Aethlabs microAeth MA Series User manual
microAeth®
MA Series MA200, MA300, MA350
Operating Manual
© 2018 AethLabs
https://aethlabs.com
Firmware v1.08, microAeth Manager v1.03
December 2018, rev03
1. Introduction ...................................................................................................................................................... 8
1.1. Serial Number.............................................................................................................................................. 8
1.2. Overview ...................................................................................................................................................... 8
1.3. Instrument Diagrams................................................................................................................................ 9
1.3.1. MA200.................................................................................................................................................... 9
1.3.2. MA300.................................................................................................................................................... 10
1.3.3. MA350.................................................................................................................................................... 11
2. Safety, Handling, and Support....................................................................................................................... 12
2.1. Important Safety Information ................................................................................................................ 12
2.1.1 Handling.................................................................................................................................................. 12
2.1.2. Repair..................................................................................................................................................... 12
2.1.3. Light Sources........................................................................................................................................ 12
2.1.4. Battery................................................................................................................................................... 13
2.1.5. Charging / Power Source................................................................................................................... 13
2.1.6. Heat Exposure ...................................................................................................................................... 13
2.1.7. Radio Frequency Exposure................................................................................................................. 13
2.1.8. Radio Frequency Interference (FCC and IC Compliance Statements) .................................... 13
2.1.9. Medical Device Interference ............................................................................................................. 14
2.1.10. Explosive Atmospheres .................................................................................................................... 14
2.1.11. High-consequence Activities ........................................................................................................... 14
2.1.12. Choking Hazard .................................................................................................................................. 14
2.2. Important Handling Information............................................................................................................ 14
2.2.1. Moving Parts......................................................................................................................................... 14
2.2.2. Exposure to liquid, excessive dust, or foreign objects ................................................................. 14
2.2.3. Using connectors, ports, and buttons ............................................................................................ 14
2.2.4. Operating Temperature...................................................................................................................... 14
2.2.5. Consumables........................................................................................................................................ 15
2.2.6. Cleaning ................................................................................................................................................ 15
2.2.7. Replacement Parts.............................................................................................................................. 15
2.2.8. Accessories .......................................................................................................................................... 15
2.2.9. Servicing ............................................................................................................................................... 15
2.2.10. Disposal............................................................................................................................................... 15
2.2.11. Shipping ............................................................................................................................................... 16
2.3. Warranty...................................................................................................................................................... 16
2.4. End User License Agreement (EULA)...................................................................................................... 17
2.5. Regulatory and Compliance Notices ..................................................................................................... 20
3. Unpacking .......................................................................................................................................................... 21
3.1. MA200 Included Items ............................................................................................................................. 21
3.2. MA300 Included Items............................................................................................................................. 21
3.3. MA350 Included Items............................................................................................................................. 21
3.4. Consumables.............................................................................................................................................. 22
3.5. Accessories................................................................................................................................................. 22
3.6. Replacement Parts.................................................................................................................................... 23
4. Measurements .................................................................................................................................................. 24
4.1. Particles....................................................................................................................................................... 24
4.1.1. DualSpot®Loading Compensation (beta)....................................................................................... 24
4.2. Temperature ............................................................................................................................................... 24
4.3. Relative Humidity and Dewpoint ............................................................................................................ 24
4.4. Altimeter/Barometer................................................................................................................................ 25
4.5. Accelerometer ........................................................................................................................................... 25
4.6. GPS............................................................................................................................................................... 25
4.7. Flow............................................................................................................................................................... 25
5. Configuration and Operation......................................................................................................................... 26
5.1. Overview ...................................................................................................................................................... 26
5.2. Recommendations for Best Use Practices ........................................................................................... 26
5.2.1. Instrument Settings: Measurement Timebase and Flow Rate.................................................... 26
5.2.2. Battery Runtime on Single Charge.................................................................................................. 27
5.2.3. Effects of Contamination .................................................................................................................. 27
5.2.4. Recommended Settings for Different Scenarios ......................................................................... 27
5.2.5. Contamination, Maintenance, and Cleaning of Sample Chamber............................................. 27
5.2.7. Contamination Probability for Various Use Scenarios................................................................. 27
5.2.8. Recommended Cleaning & Maintenance Intervals ...................................................................... 28
5.2.9. microCyclone™PM2.5 Size-selective inlet.................................................................................... 28
5.3. Measurement Sampling Connections ................................................................................................... 28
5.3.1. Inlet Port............................................................................................................................................... 28
5.3.2. Outlet Port ........................................................................................................................................... 28
5.4. Power ........................................................................................................................................................... 29
5.4.1. Charging................................................................................................................................................ 29
5.4.2. Turn on .................................................................................................................................................. 29
5.4.3. Turn off.................................................................................................................................................. 29
5.5. Communication ......................................................................................................................................... 29
5.5.1. On-board user interface.................................................................................................................... 29
5.5.2. USB 2.0.................................................................................................................................................. 29
5.5.3. 3.3V TTL Serial...................................................................................................................................... 30
5.5.4. Wi-Fi ...................................................................................................................................................... 30
5.5.5. Bluetooth Low Energy ........................................................................................................................ 30
5.6. Instrument Operating Parameters........................................................................................................ 30
5.6.1. Date/Time: GPS time synchronization (microAeth Manager only)............................................ 30
5.6.1. Date/Time: Application time synchronization (microAeth Manager only) ............................... 30
5.6.2. Date/Time: Timezone offset (microAeth Manager only).............................................................. 31
TABLE OF CONTENTS
5.6.3. Flow setpoint ....................................................................................................................................... 31
5.6.4. Timebase............................................................................................................................................... 31
5.6.5. Wavelengths (microAeth Manager only)......................................................................................... 31
5.6.6. Sampling mode (microAeth Manager only).................................................................................... 31
5.6.7. AutoSample.......................................................................................................................................... 32
5.6.8. GPS (microAeth Manager only)........................................................................................................ 32
5.6.9. Serial baud rate ................................................................................................................................... 32
5.6.10. Serial data mode ............................................................................................................................... 32
5.6.11. Serial data format (microAeth Manager only).............................................................................. 32
5.6.12. Tape advance ATN threshold........................................................................................................... 32
5.7. Using the microAeth Manager Software ............................................................................................... 33
5.7.1. microAeth Manager Software Installation ..................................................................................... 33
5.7.1.1. Installation on macOS.................................................................................................................. 33
5.7.1.2. Installation on Windows .............................................................................................................. 33
5.7.2. Overview................................................................................................................................................ 34
5.7.2.1. Main Application Window............................................................................................................. 34
5.7.2.1.1. Manage Application Button and Section............................................................................ 34
5.7.2.1.2. Notifications Section ............................................................................................................. 34
5.7.2.1.3. Device Section......................................................................................................................... 35
5.7.3. Configuration and Status of Instrument and Operating Parameters...................................... 35
5.7.3.1. Battery ............................................................................................................................................ 35
5.7.3.2. Status.............................................................................................................................................. 35
5.7.3.3. Date/Time ...................................................................................................................................... 35
5.7.3.3.1. GPS time synchronization .................................................................................................... 35
5.7.3.3.2. Application time synchronization ....................................................................................... 36
5.7.3.3.3. Timezone offset ...................................................................................................................... 36
5.7.3.4. Memory........................................................................................................................................... 36
5.7.3.5. Firmware......................................................................................................................................... 36
5.7.3.6. Flow setpoint ................................................................................................................................. 36
5.7.3.7. Timebase ......................................................................................................................................... 36
5.7.3.8. Wavelengths .................................................................................................................................. 37
5.7.3.9. Sampling mode.............................................................................................................................. 37
5.7.3.10. AutoSample ................................................................................................................................. 37
5.7.3.11. GPS................................................................................................................................................. 37
5.7.3.12. Serial baud rate ........................................................................................................................... 37
5.7.3.13. Serial data mode ......................................................................................................................... 38
5.7.3.14. Serial data format....................................................................................................................... 38
5.7.3.15. Tape advance ATN threshold..................................................................................................... 38
5.7.4. Data Sessions Management in the microAeth Manager.............................................................. 38
5.7.5. Data Download in the microAeth Manager..................................................................................... 39
5.7.6. Exporting Data from the microAeth Manager local database .................................................... 40
5.7.7. Delete All Data on the microAeth..................................................................................................... 41
5.8. Using the on-board user interface......................................................................................................... 42
5.8.1. Overview ............................................................................................................................................... 42
5.8.2. Configuration of Instrument Operating Parameters.................................................................. 42
5.8.2.1. Change Timebase.......................................................................................................................... 42
5.8.2.2. Change Flow.................................................................................................................................. 42
5.8.2.3. Change Tape Adv. ATN................................................................................................................. 42
5.8.3. Operation and Status ........................................................................................................................ 43
5.8.3.1. Start Measurement ...................................................................................................................... 43
5.8.3.2. Stop Measurement....................................................................................................................... 43
5.8.3.3. Advance Tape ................................................................................................................................ 43
5.8.3.4. Filter Tape Cartridge Removal and Installation ..................................................................... 44
5.8.3.5. Calibrate Flow............................................................................................................................... 44
5.8.3.6. Test Flow ........................................................................................................................................ 45
5.8.3.7. Calibrate Optics............................................................................................................................ 45
5.8.3.8. Change Serial Mode..................................................................................................................... 45
5.8.3.9. Change Serial Baud...................................................................................................................... 45
5.8.3.10. Change AutoSample.................................................................................................................. 46
5.8.3.11. Display All Settings (terminal emulator interface only) ...................................................... 46
5.8.3.12. Display FlowCal Info (terminal emulator interface only).................................................... 47
5.8.3.13. Turn Off ........................................................................................................................................ 47
5.8.4. On-board Status Indications ........................................................................................................... 48
5.8.4.1. Serial Number ............................................................................................................................... 48
5.8.4.2. Battery ........................................................................................................................................... 48
5.8.4.3. Charging ........................................................................................................................................ 48
5.8.4.4. Startup........................................................................................................................................... 48
5.9. Command Line Interface (CLI) for Polled Serial Data Mode............................................................. 48
5.9.1. AethLabs Serial Protocol.................................................................................................................... 49
5.9.2. Bayern-Hessen Protocol.................................................................................................................... 49
5.10. Filter Media ............................................................................................................................................... 52
5.11. Data Safety................................................................................................................................................ 52
6. Viewing and Analyzing Measurement Data ................................................................................................. 53
6.1. Data File Structure .................................................................................................................................... 53
6.2. Serial Data Format Structures ............................................................................................................... 58
6.2.1. Verbose Structure............................................................................................................................... 58
6.2.2. Minimal Structure ............................................................................................................................... 64
6.3. Status Codes.............................................................................................................................................. 65
7. Maintenance and Service................................................................................................................................ 66
7.1. Cleaning........................................................................................................................................................ 66
7.2. Display and Check All Settings................................................................................................................ 66
7.2.1. Display All Settings Descriptions...................................................................................................... 67
7.2.2. Display All Settings Example ............................................................................................................. 70
7.3. Flow Calibration ......................................................................................................................................... 72
7.3.1. Flow Calibration Table......................................................................................................................... 72
7.3.2. Display and Check Flow Calibration Table ...................................................................................... 72
7.3.2.1. Flow Calibration Table Results Descriptions............................................................................ 73
7.3.2.2. Flow Calibration Table Example.................................................................................................. 74
7.3.3. Test Flow Procedure............................................................................................................................ 75
7.3.4. Flow Calibration Kit Setup................................................................................................................. 76
7.3.5. Flow Calibration Procedure............................................................................................................... 77
7.4. Optical Calibration Procedure ................................................................................................................ 78
7.5. Installing Operating System Firmware.................................................................................................. 79
7.5.1. Upgrading firmware from version 1.05 to 1.08............................................................................... 79
7.5.2. Upgrading firmware from version 1.07 to 1.08............................................................................... 81
8. Technical Specifications ................................................................................................................................. 84
8.1. MA200.......................................................................................................................................................... 84
8.2. MA300.......................................................................................................................................................... 86
8.3. MA350.......................................................................................................................................................... 88
microAeth® MA Series MA200, MA300, MA350 Operating Manual 9
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8 microAeth® MA Series MA200, MA300, MA350 Operating Manual AethLabs
1.1. Serial Number
The model and serial number of the microAeth MA200 and microAeth MA300 are located on the bottom and
back of the instruments adjacent to the USB port. The model and serial number of the microAeth MA350 is
located on the inside of the main enclosure door of the instrument adjacent to the USB port. Record the serial
number in the space provided below. Refer to these numbers whenever you contact AethLabs for service.
Model: microAeth® MA_____
Serial Number: MA_____-______
1.2. Overview
Thank you for your purchase of the AethLabs microAeth® Black Carbon monitor. This product is the result
of many years of research and development and represents a leap forward in mobile and stationary Black
Carbon measurements. We hope that the features and capabilities of this product will enable new types of
research and scientic inquiry. Please let us know how you use the instrument and if there is anything we can
do to help.
The microAeth MA Series instruments are portable scientic instruments which measure the mass
concentration of light absorbing carbonaceous particles in a sampled aerosol. The instruments have 5
analytical channels each operating at a different wavelength (880 nm, 625 nm, 528 nm, 470 nm, 375 nm).
Measurement at 880 nm is interpreted as concentration of Black Carbon (‘BC’). Measurement at 375 nm
is interpreted as Ultraviolet Particulate Matter (‘UVPM’) indicative of organic sources such as woodsmoke,
tobacco, and biomass burning. The MA Series instruments have a number of important advancements. The
microAeth MA Series feature miniature cartridges that have a spool of lter material for particulate collection
and on-board analysis. The instrument automatically controls the advance of the tape material, moving to a
new unused spot when required. This allows the instrument to run continuously for multiple weeks or months
without human intervention. The 5 wavelength optical engine enables discrimination between organic and
elemental particles which is helpful in source identication when measuring different aerosols. The MA Series
also features the DualSpot® loading compensation method, which in real-time measures and adjusts for
differing optical properties of particles of varying age and composition.
1. Introduction 1.3. Instrument Diagrams
1.3.1. MA200
1. Inlet port
2. User interface screen
3. Outlet port
4. User interface buttons (3)
5. DC Barrel jack port
6. USB mini-B port
7. 4-pin 3.3V TTL serial port
8. Filter tape cartridge door
9. Flat head screw in lter tape cartridge door
10. Serial number label
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1.3.2. MA300
1. Filter tape cartridge door
2. Flat head screws (2) in lter tape cartridge door
3. User interface screen
4. User interface buttons (3)
5. Inlet port
6. Outlet port
7. DC Barrel jack port
8. USB mini-B port
9. 4-pin 3.3V TTL serial port
10. Serial number label
1.3.3. MA350
1. Enclosure door
2. Enclosure door padlock loop
3. Enclosure latches (2)
4. Wall mounting kit bosses (4)
5. Inlet port
6. Outlet port
7. Sealing circular connector for DC power in, 3.3V TTL serial comms
8. Cap for sealing circular connector
9. Enclosure door gasket
10. Serial number label
11. USB mini-B port
12. User interface buttons (3)
13. User interface screen
14. Flat head screw (1) in lter tape cartridge door
15. Filter tape cartridge door
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2. Safety, Handling, and Support
2.1. Important Safety Information
WARNING: Correct operation of the microAeth is imperative for safe functioning. Failure to follow these
safety instructions could result in re, electric shock, injury, or damage to the microAeth, accessories, or
other property. Only AethLabs authorized service personnel should remove covers except lter tape cartridge
door. Never disassemble or make modications to the microAeth as it may cause damage or hazard. Read all
safety information and familiarize yourself with the contents of this user manual before using the microAeth.
2.1.1 Handling
Please handle the microAeth with care. The microAeth has sensitive electronic and mechanical components
inside that if disturbed or damaged can cause measurement issues and possible hazard. The microAeth
and its lithium-ion battery can be damaged if dropped, impacted, burned, punctured, crushed, or exposed
to liquid. If damage is noticed or suspected, discontinue use of the microAeth and any accessories until the
instrument has been inspected or repaired by AethLabs authorized service personnel.
2.1.2. Repair
Only AethLabs authorized service personnel should repair or service the microAeth. Never disassemble
the microAeth for any reason including repair. Never remove covers except for the lter tape cartridge
door. Always make sure the lter tape cartridge door is reinstalled when the instrument is in use. Making
modications or repairs to the microAeth will void any warranty and may cause damage or hazard.
2.1.3. Light Sources
The microAeth contains components with emissions in both the visible (red, green, and blue ) and invisible
spectrums (infrared and ultraviolet). These components are covered during operation and not directly
accessible but can cause injury and damage if unauthorized disassembly or repair is made to these sources
or any of their mating components. Do not look directly at the light sources as it may be hazardous to do
so with the naked eye or with the aid of optical instruments. The microAeth contains a Class 1M LED light
source product. Do not directly view the light sources with optical instruments. Only AethLabs authorized
service personnel should move, modify, service, or repair the light sources and mating components.
2.1.4. Battery
Do not attempt to disconnect, connect, or replace the lithium-ion battery in the microAeth. Do not expose
the battery to sources of excessive heat. Only AethLabs authorized service personnel should service or
replace the battery in the microAeth. Never remove covers except for the lter tape cartridge door. Always
make sure the lter tape cartridge door is reinstalled while the instrument is in use. The lithium-ion battery
in the microAeth must be recycled or disposed of properly and separately from general or household waste
in compliance with local laws and regulations. The lithium-ion battery contained in the microAeth and
therefore the microAeth must be packaged and shipped properly. Please see section 2.2.11. Shipping for
more information. Do not incinerate the battery. Do not handle damaged or leaking lithium-ion batteries.
CAUTION RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.
2.1.5. Charging / Power Source
The microAeth should only be operated and charged from the power source types indicated in the
instrument specications. Charge and operate the microAeth with the supplied power barrel jack for fast
charging or the supplied USB cable for charging over USB. Only genuine cables and power chargers from
AethLabs should be used. Do not use any cables, power chargers, or power sources with the microAeth
that are not supplied by, or recommended by AethLabs, as they may cause damage or a hazard. Always
inspect ports and cables before making any connection to the instrument. Damaged cables or chargers, or
charging when moisture is present, can cause re, electrical shock, other injury, or damage.
2.1.6. Heat Exposure
Do not expose the microAeth or its battery to sources of excessive heat such as direct, high intensity
sunshine or re. Always provide adequate ventilation, shelter, or protection for the instrument.
2.1.7. Radio Frequency Exposure
The microAeth uses radio signals for wireless communications with networks and other instruments.
2.1.8. Radio Frequency Interference (FCC and IC Compliance Statements)
The effect of electromagnetic elds from components and radios contained in the microAeth on other
electronic devices is dependent on various factors and is unpredictable. The microAeth complies with Part
15 of the FCC Rules and with Industry Canada licence-exempt RSS standard(s). Operation is subject to
the following two conditions: (1) this device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired operation. Do not use
near life critical systems. The electromagnetic elds from the instrument may interfere with other electronic
devices. Follow all signs and notications that prohibit or restrict the use of electronic devices and wireless
transmitters.
Important: Changes or modications to this product not authorized by AethLabs could void the
electromagnetic compatibility (EMC) and wireless compliance and negate your authority to operate the
product. This product has demonstrated EMC compliance under conditions that included the use of
compliant peripheral devices and shielded cables between system components. It is important that you use
compliant peripheral devices and shielded cables between system components to reduce the possibility of
causing interference to radios, televisions, and other electronic devices.
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2.1.9. Medical Device Interference
The effect of electromagnetic elds from components and radios contained in the microAeth on medical
devices is dependent on various factors and is unpredictable. The electromagnetic elds from the
instrument may interfere with medical devices.
2.1.10. Explosive Atmospheres
Never use, charge, or make connections to the microAeth in any area with a potentially explosive
atmosphere or near re or ammable substances.
2.1.11. High-consequence Activities
The microAeth is not intended for use where the failure of the microAeth could lead to death, personal
injury, or severe environmental damage.
2.1.12. Choking Hazard
Some microAeth components and accessories may present a choking hazard to children. Keep these
components and accessories away from children.
2.2. Important Handling Information
2.2.1. Moving Parts
The microAeth contains motorized moving parts. Be careful of moving parts when the lter tape cartridge
door is open and or interacting with the lter tape cartridge advance and analysis chamber mechanisms.
2.2.2. Exposure to liquid, excessive dust, or foreign objects
Never expose the microAeth, ports, cables, or connections to the instrument to liquid or excessive dust.
Never insert foreign objects into any opening or port. This instrument, ports, and air passageways should
not be exposed to rain, moisture, objects lled with liquids, or any other sources or forms of liquid.
2.2.3. Using connectors, ports, and buttons
Never force any connector, cable, or foreign object into any port or opening in the instrument. Do not
apply excessive pressure when inserting the lter tape cartridge into the instrument, pressing a button,
or inserting or threading a cable or tubing connector into a port. Be careful to align threaded connectors
correctly and to assure correct orientation while inserting all connectors. If the cable or tubing connector
and port do not join with reasonable ease, they may not be compatible or there may be an obstruction.
Always inspect ports and cables before making any connection to the instrument. If a port is obstructed or
a cable is damaged or frayed, contact AethLabs or an authorized representative immediately for support
and genuine AethLabs replacement components.
2.2.4. Operating Temperature
The microAeth is designed to operate in ambient temperatures and conditions of 0 ~ 40 °C, non-
condensing. The microAeth can be damaged and battery life shortened if stored or operated outside
of these conditions. For safety reasons the internal battery charger may disable battery charging if the
instrument is operating at extreme temperatures. Avoid exposing the microAeth, connections, and tubing
to rapid and dramatic changes in temperature or humidity. Care must be taken to identify installation and
use conditions that might cause condensation of the sample aerosol stream or of the instrument itself. Such
condensation can cause instrument damage, electrical shock, or hazard.
2.2.5. Consumables
Filter tape cartridges will require replacement on a regular basis depending on the measurement
environment and the operating settings of the instrument. Only genuine AethLabs lter material and
cartridges, supplied by AethLabs or authorized representative, should be used in the microAeth.
2.2.6. Cleaning
If the microAeth is exposed to any liquids or other damaging contaminants, immediately turn off the
instrument, disconnect all cables, and remove any foreign substances in contact with the instrument.
Do not use liquids or other cleaning products on the instrument. Wait until the microAeth is completely
dry before charging or turning on the instrument. Only AethLabs authorized service personnel should
clean the air passageways and internal components of the microAeth. Keeping the microAeth and its air
passageways, internal components, and optical chambers clean is critical for maintaining the instrument
and producing quality measurements. Contamination of the instrument can cause increased measurement
noise, poor sealing of the analytical area and degraded operational lifetime of some components. AethLabs
recommends sending your instrument for annual service, or more frequent service depending on use and
operating conditions.
2.2.7. Replacement Parts
Only genuine AethLabs parts should be used in the microAeth. Only AethLabs authorized service personnel
should make repairs, install replacement parts, or open the instrument except for the lter tape cartridge
door. Always make sure the lter tape cartridge door is reinstalled when the instrument is in use.
2.2.8. Accessories
Only use genuine accessories from AethLabs or recommended by AethLabs. Do not use any accessories
with the microAeth that are not supplied by or recommended by AethLabs, as they may cause damage or
hazard.
2.2.9. Servicing
Only AethLabs authorized service personnel should service the microAeth. Never remove covers except
for the lter tape cartridge door. Always make sure the lter tape cartridge door is reinstalled when the
instrument is in use.
2.2.10. Disposal
The microAeth and/or its battery must be recycled or disposed of properly and separately from general or
household waste in compliance with local laws and regulations. When this product reaches its end of life,
take it to a collection point designated by local authorities. The separate collection and recycling of your
product and/or its battery at the time of disposal will help conserve natural resources and ensure that it is
recycled in a manner that protects human health and the environment.
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2.2.11. Shipping
The microAeth MA series instruments contain lithium-ion batteries and therefore must be packaged and
shipped properly according to regulations for different shipping methods. Please refer to International
Air Transport Association (IATA) regulations when shipping the microAeth as there are limits to how many
microAeth can be shipped in a single box based on the battery size in each instrument. The microAeth
MA200 contains a 3.6V, 3200mAh (11.52 Wh), 1 cell rechargeable lithium-ion battery. The microAeth MA300
contains a 3.6V, 12800mAh (46.08 Wh), 4 cell rechargeable lithium-ion battery. The microAeth MA350
contains a 3.6V, 12800mAh (46.08 Wh), 4 cell rechargeable lithium-ion battery. Please contact your shipping
carrier for more information and for packing instructions.
2.3. Warranty
If product(s) were not purchased directly from AethLabs. please check with your reseller for Warranty details.
Disclaimer of Warranties; Limitation of Liability. Seller warrants that the Products sold hereunder, under normal
use and service as described in the operator’s manual, shall be free from defects in workmanship and material
for the lesser of (i) twelve (12) months, or (ii) the length of time specied in the operator’s manual, from the
date of the shipment to the Buyer (“Warranty Period”). This Warranty Period is inclusive of any statutory
warranty. Notwithstanding the foregoing, this limited warranty is subject to the following exclusions and
exceptions: (i) air pumps are warranted only for ninety (90) days unless otherwise specied in the operator’s
manuals; (ii) parts repaired or replaced as a result of repair services are warranted to be free from defects in
workmanship and material, under normal use, for the later of (a) ninety (90) days from the date of shipment
to the Buyer, or (b) the end of the Warranty Period; (iii) Seller does not provide any warranty on nished
goods manufactured by others or on other consumable materials; and (iv) unless specically authorized by
separate writing by Seller, Seller makes no warranty with respect to, and shall have no liability in connection
with, goods which are incorporated into other products or equipment, or which are modied by any person
other than Seller. Seller agrees during the Warranty Period, to repair or replace, at Seller’s option, defective
Products so as to cause the same to operate in substantial conformance with the published specications
thereof; provided that Buyer shall (i) promptly notify Seller in writing upon the discovery of any defect, which
notice shall be provided during the Warranty Period and shall include the product model and serial number (if
applicable) and details of the warranty claim, and (ii) prepay the shipment costs. Replacement parts may be
new or refurbished, at the election of Seller. All replaced parts shall become the property of Seller. Shipment
to customer of repaired or replacement Products shall be made in accordance with the delivery provisions set
forth in these Terms. In no event shall Seller have any obligation to make repairs, replacements or corrections
required, in whole or in part, as the result of: (i) normal wear and tear; (ii) accident, disaster or event of force
majeure; (iii) misuse, fault or negligence of or by Buyer; (iv) use of the Products in a manner for which they
were not designed; (v) causes external to the Products such as, but not limited to, water damage, impact
damage from fall, power failure or electrical power surges, lack of maintenance; (vi) improper storage and
handling of the Products; or (vii) use of the Products in combination with equipment or software not supplied
by Seller. If Seller determines that Products for which Buyer has requested warranty services are not covered
by the warranty hereunder, Buyer shall pay or reimburse Seller for all costs of investigating and responding
to such request at Seller’s then prevailing time and materials rates. If Seller provides repair services or
replacement parts that are not covered by this warranty, Buyer shall pay Seller therefore at Seller’s then
prevailing time and materials rates. ANY INSTALLATION, MAINTENANCE, REPAIR, SERVICE, RELOCATION
OR ALTERATION TO OR OF, OR OTHER TAMPERING WITH, THE PRODUCTS PERFORMED BY ANY
PERSON OR ENTITY OTHER THAN SELLER WITHOUT SELLER S PRIOR WRITTEN APPROVAL, OR ANY
USE OF REPLACEMENT PARTS NOT SUPPLIED BY SELLER, SHALL IMMEDIATELY VOID AND CANCEL
ALL WARRANTIES WITH RESPECT TO THE AFFECTED PRODUCTS. THE OBLIGATIONS CREATED BY
THIS WARRANTY STATEMENT TO REPAIR OR REPLACE A DEFECTIVE PRODUCT SHALL BE THE SOLE
REMEDY OF BUYER IN THE EVENT OF A DEFECTIVE PRODUCT OR OTHERWISE FOR BREACH OF THIS
WARRANTY OR THESE TERMS. EXCEPT AS EXPRESSLY PROVIDED IN THIS WARRANTY STATEMENT,
SELLER DISCLAIMS ALL OTHER WARRANTIES, WHETHER EXPRESS OR IMPLIED, ORAL OR WRITTEN,
WITH RESPECT TO THE PRODUCTS, INCLUDING WITHOUT LIMITATION ALL IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. SELLER DOES NOT WARRANT THAT
THE PRODUCTS ARE ERROR-FREE OR WILL ACCOMPLISH ANY PARTICULAR RESULT. SELLER MAKES
NO OTHER REPRESENTATION OR WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, REGARDING THE
PRODUCTS, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SELLER BE LIABLE FOR COSTS OF PROCUREMENT
OF SUBSTITUTE GOODS AND SERVICES, LOSS OF USE OR LOST PROFITS, OR ANY OTHER SPECIAL,
INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES, ARISING OUT OF OR RELATED TO ANY SALE
OF THE PRODUCTS OR THE USE OR PERFORMANCE OF THE PRODUCTS, HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN AN ACTION FOR CONTRACT, TORT OR OTHERWISE, AND
WHETHER OR NOT SELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
2.4. End User License Agreement (EULA)
READ THIS END USER LICENSE AGREEMENT (“AGREEMENT”) CAREFULLY BEFORE USING THE
ACCOMPANYING SOFTWARE AND ANY ASSOCIATED FIRMWARE (COLLECTIVELY, THE “SOFTWARE”).
BY DOWNLOADING AND USING THE SOFTWARE, YOU ACKNOWLEDGE THAT YOU HAVE READ THIS
AGREEMENT, THAT YOU UNDERSTAND IT, AND THAT YOU ACCEPT AND AGREE TO BE BOUND BY ITS
TERMS. IF YOU ARE NOT WILLING TO BE BOUND BY THE TERMS OF THIS AGREEMENT, YOU SHOULD
TERMINATE THE DOWNLOAD AND/OR INSTALLATION PROCESS, AND REFRAIN FROM ACCESSING OR
USING THE SOFTWARE.
THE SOFTWARE IS COPYRIGHTED AND IS LICENSED TO YOU UNDER THIS AGREEMENT; IT IS NOT
SOLD TO YOU. THIS AGREEMENT REPRESENTS THE ENTIRE AGREEMENT BETWEEN YOU AND
MICROAETH CORPORATION DBA AETHLABS CONCERNING THE SOFTWARE, AND THIS AGREEMENT
SUPERSEDES AND REPLACES ANY PRIOR PROPOSAL, REPRESENTATION, OR UNDERSTANDING YOU
MAY HAVE HAD WITH AETHLABS RELATING TO THE SOFTWARE.
License Grant. microAeth Corporation DBA AethLabs (“Licensor”) hereby grants you a personal, non-
transferable and non-exclusive license to use (i) the Software, and (ii) any related documentation or electronic
instructions accompanying the Software (the “Documentation”).
You obtain no right, title or ownership in any Software or Documentation, nor do you obtain any right to
sublicense the Software. The Software may be used only as provided in either machine-readable object code
form or machine-compressed form. This license is not a sale of the original or any copy of the Software.
You may use the Documentation to assist in your use of the Software, but you may not make copies of the
Documentation.
Use Restrictions. Except to the extent these restrictions are prohibited by applicable law or prohibited by
the terms of any Open Source License, you must not, and must not allow any other person to: (a) use the
Software to conduct comparative or competitive analyses, including benchmarking; (b) reverse engineer,
decompile, reverse compile, reduce in human readable form or otherwise access the source code of the
Software; (c) sublicense, rent, lease, modify, enhance, supplement, create derivative works from the Software;
18 microAeth® MA Series MA200, MA300, MA350 Operating Manual microAeth® MA Series MA200, MA300, MA350 Operating Manual 19
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(d) copy the Software; (e) remove or otherwise tamper with any proprietary notices contained on or in the
Software; or (f) use or permit the Software to be used to perform services for third parties, without Licensor’s
express written authorization.
Software Transfers. Unless Licensor has given you specic written permission to do so, you may not copy,
transfer, transmit, sublicense or assign your rights to use the Software, grant a security interest in or over your
rights to use the Software, or otherwise transfer any part of your rights to use the Software.
Warranty Disclaimers, Limitations on Liability and Remedies. THE SOFTWARE IS PROVIDED TO YOU ON
AN “AS IS” BASIS AND IS USED ONLY AT YOUR SOLE RISK. TO THE FULLEST EXTENT PERMISSIBLE
BY LAW, LICENSOR DISCLAIMS ALL WARRANTIES, EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE,
OF ANY KIND REGARDING SOFTWARE, INCLUDING ANY IMPLIED WARRANTIES AS TO FITNESS FOR
A PARTICULAR PURPOSE, MERCHANTABILITY, TITLE, NON-INFRINGEMENT, RESULTS, ACCURACY,
COMPLETENESS, ACCESSIBILITY, COMPATIBILITY, SECURITY AND FREEDOM FROM COMPUTER VIRUS.
IF APPLICABLE LAW DOES NOT ALLOW THE EXCLUSION OF SOME OR ALL OF THE ABOVE IMPLIED
WARRANTIES TO APPLY TO YOU, THE ABOVE EXCLUSIONS WILL APPLY TO YOU TO THE FULLEST
EXTENT PERMITTED BY APPLICABLE LAW. Any warranties that by law survive the foregoing disclaimers
shall terminate ninety (90) days from the date you received the Software.
The entire risk as to the quality and performance of the Software and the Documentation is with you. Should
the Software or the Documentation prove defective, you (and not Licensor or its distributors, licensors
or dealers) assume the entire cost of all necessary servicing or repair. Licensor does not warrant that the
functions contained in the Software will meet your requirements or operate in the combination that you may
select for use, that the operation of the Software will be uninterrupted or error free, or that defects in the
Software will be corrected. No oral or written statement by Licensor or by a representative of Licensor shall
create a warranty or increase the scope of this warranty.
LICENSOR’S ENTIRE LIABILITY AND YOUR EXCLUSIVE REMEDY WITH RESPECT TO ANY DISPUTE WITH
LICENSOR (INCLUDING WITHOUT LIMITATION YOUR USE OF THE SOFTWARE) IS TO DISCONTINUE
YOUR USE OF THE SOFTWARE. LICENSOR AND ITS VENDORS SHALL NOT BE LIABLE FOR ANY
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL OR EXEMPLARY DAMAGE ARISING
FROM YOUR USE OF THIS SOFTWARE OR FOR ANY OTHER CLAIM RELATED IN ANY WAY TO YOUR
USE OR REGISTRATION WITH LICENSOR. THESE EXCLUSIONS FOR DIRECT, INDIRECT, SPECIAL,
INCIDENTAL, CONSEQUENTIAL OR EXEMPLARY DAMAGES INCLUDE, WITHOUT LIMITATION, DAMAGES
FOR LOST PROFITS, LOST DATA, LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR
MALFUNCTION, OR ANY OTHER COMMERCIAL DAMAGES OR LOSSES, EVEN IF LICENSOR HAD BEEN
ADVISED OF THE POSSIBILITY THEREOF AND REGARDLESS OF THE LEGAL OR EQUITABLE THEORY
UPON WHICH THE CLAIM IS BASED. BECAUSE SOME STATES OR JURISDICTIONS DO NOT ALLOW
THE EXCLUSION OR THE LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES,
IN SUCH STATES OR JURISDICTIONS, LICENSOR AND ITS VENDORS’ LIABILITY IN SUCH STATE OR
JURISDICTION SHALL BE LIMITED TO THE FULLEST EXTENT PERMITTED BY LAW. IN ANY EVENT,
IF ANY OF THE ABOVE PROVISIONS IN THIS SECTION ARE NOT ENFORCEABLE IN AN APPLICABLE
JURISDICTION, THE MAXIMUM LIABILITY OF LICENSOR WILL BE LIMITED TO, IN THE SOLE DISCRETION
OF LICENSOR, EITHER THE (1) CORRECTION OR DELETION OF ANY DEFECTIVE SOFTWARE; OR (2)
REFUND OF ANY FEES FOR THIS SOFTWARE RECEIVED BY LICENSOR FROM YOU, IF ANY.
Ownership and Licenses. Licensor and its licensors own all copyright, trademarks, designs, patents, know-
how, trade secrets, trade, business or company names, domain names and related registration rights and
all other intellectual property rights in the Software, including any modications (“Licensor IP”). Licensor IP
is protected by U.S. and international copyright and other intellectual property laws. You are only granted
license rights in the Software, expressly stated in this Agreement. You must not do anything to jeopardize
Licensor’s or its licensors’ rights in the Licensor IP including to (i) copy, modify, merge, or transmit Licensor
IP; (ii) register or attempt to register any competing intellectual property rights to the Licensor IP; (iii) delete
or tamper with any proprietary notices on or in the Licensor IP, (iv) take or use any action that diminishes
the value of any trademarks included in the Licensor IP, or (v) use the Software in violation of applicable law.
These restrictions are in addition to those stated in Section 2.
Third Party and Open Source Software. Portions of the Software may utilize or incorporate third party
software and other copyrighted material. Acknowledgements, licensing terms and additional disclaimers for
any such material are contained in the Documentation or may otherwise accompany such material, and your
use of such material is governed by their respective terms. Certain software libraries and other third party
software included within the Software are open source software and licensed under the terms of licenses
such as the BSD License, GNU General Public License (“GPL”), and/or GNU Lesser General Public License
(“LGPL”). To the extent that portions of the Software are distributed under and subject to open source
licenses obligating Licensor to make the source code for such portions publicly available (such as the GPL
and LGPL), Licensor will make such source code portions (including Licensor modications, as appropriate)
available upon request for a period of up to three (3) years from the date of distribution. Such request can
be made in writing to: microAeth Corporation (refer to current mailing address available at https://aethlabs.
com). A copy of the GPL may be obtained at http://www.gnu.org/licenses/gpl.html, and a copy of the LGPL at
http://www.gnu.org/licenses/lgpl.html.
Term and Termination of Agreement. This Agreement is effective upon your downloading, accessing or
using the Software. This Agreement shall continue in effect until terminated. Without prejudice to any other
rights, this Agreement will terminate automatically if you fail to comply with any of the limitations or other
requirements described herein. Furthermore, you may terminate this Agreement at any time by destroying
all copies of the Software and Documentation. All obligations of condentiality and restrictions on use, and
all other provisions that may reasonably be interpreted to survive termination of this Agreement, will survive
termination of this Agreement for any reason.
U.S. Government Restricted Rights. If you are a U.S. Government user, then the Software and Documentation
(i) are provided with “RESTRICTED RIGHTS” and the use, duplication or disclosure of the Software and
Documentation is subject to the restrictions set forth in subparagraphs (c)(1) and (c)(2) of the Commercial
Computer Software-Restricted Rights (Jun 1987) clause at FAR 52.227-19, and (ii) are provided with “LIMITED
RIGHTS” and the use, duplication and disclosure of the Software and Documentation is subject to the
restrictions set forth in subparagraphs (a)(13) and (b)(3) of the Rights in Technical Data-Noncommercial Items
(Nov 1995) clause at DFARS 252.227-7013, as applicable, or their successors or any similar future statutes or
regulations. Manufacturer is microAeth Corporation DBA AethLabs.
Export Control Laws. You agree to comply with all laws, rules and regulations applicable to the export of the
Software or the Documentation. Specically, you shall not export, re-export or transship the Software or the
Documentation, or the direct product thereof, in violation of any United States or other laws and regulations
which may from time to time be applicable. None of the Software, Documentation or underlying information
or technology may be downloaded or otherwise exported or re-exported (i) into (or to a national or resident
of) Cuba, Iran, Iraq, Libya, Serbia, Montenegro, North Korea, Syria or any other country to which the U.S. has
embargoed goods; or (ii) to anyone on the U.S. Treasury Department’s list of Specially Designated Nationals
or the U.S. Commerce Department’s Table of Denial Order. By using the Software, you are agreeing to the
foregoing and you are representing and warranting that you are not located in, under the control of, or a
national or resident of any such country or on any such list.
Applicable Law and Forum. With respect to any and all disputes arising out of or in connection with this
20 microAeth® MA Series MA200, MA300, MA350 Operating Manual microAeth® MA Series MA200, MA300, MA350 Operating Manual 21
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Agreement, Licensor and you agree to negotiate in good faith and undertake reasonable efforts to cooperate
with one another in order to achieve a mutually satisfactory resolution. Licensor has no obligation to become
involved in any dispute between you and any other person. This Agreement and any dispute arising in
connection therewith shall be exclusively governed by and construed in accordance with the laws of the State
of California without regard to its conict of law principles. Licensor and you agree that all disputes arising
under this Agreement shall be resolved by condential binding arbitration administered by the American
Arbitration Association (“AAA”) in San Francisco, California, or another forum mutually agreed upon by
you and Licensor, pursuant to the Commercial Arbitration Rules (“Rules”) of the AAA by a sole arbitrator
nominated by agreement of you and Licensor and conrmed in accordance with the Rules. If AAA is not
hearing consumer commercial disputes at the time, Licensor may select another arbitral body in its sole
discretion. The arbitrator’s award shall be binding and may be entered as a judgment in a court of competent
jurisdiction. You agree that Licensor is entitled to obtain preliminary injunctive relief to the extent allowed by
law to enforce any of the terms of this Agreement pending a nal arbitral decision.
Indemnication. You agree to defend, indemnify and hold harmless Licensor, and its afliates, ofcers,
directors, employees and contractors from any demands, claims, damages, liabilities, expenses or harms,
including attorneys’ fees, arising in connection with your use of the Software, breach of this Agreement, or
dealings or transactions with other persons resulting from use of this Software.
Entire Agreement. This Agreement constitutes the complete agreement between Licensor and you with
respect to the subject matter hereof, and supersedes all prior agreements, oral or written, with respect to the
subject matter hereof.
2.5. Regulatory and Compliance Notices
This instrument meets the requirements of CE certication.
This device complies with Part 15 of the FCC Rules.
This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada. If changes are made to
this instrument or it is opened without the authorization of the manufacturer, this declaration will be rendered
invalid.
Regulatory information, certication, and compliance marks specic to microAeth are available on microAeth
and within the microAeth manual.
3. Unpacking
Carefully unpack the instrument and accessories from their packaging. Check to identify that all items
are present and that there is no damage. Retain original packaging for safe storage and shipping of the
instrument.
3.1. MA200 Included Items
microAeth MA200
MA200 Filter Tape Cartridge (1 installed in instrument)
Barrel jack AC adapter with 1 territory-specic plug
USB communication cable
Serial to USB converter cable
1 meter sampling hose with swivel tube connector
Lapel clip for sampling hose
Cross-platform microAeth® Manager software (for download via AethLabs website)
Manual (for download via AethLabs website)
3.2. MA300 Included Items
microAeth MA300
MA300/350 Filter Tape Cartridge (1 installed in instrument)
Barrel jack AC adapter with 1 territory-specic plug
USB communication cable
Serial to USB converter cable
1 meter sampling hose with swivel tube connector
Lapel clip for sampling hose
Cross-platform microAeth® Manager software (for download via AethLabs website)
Manual (for download via AethLabs website)
3.3. MA350 Included Items
microAeth MA350
MA350/350 Filter Tape Cartridge (1 installed in instrument)
MA350 Sealed connector to DC barrel jack and serial port cable
Barrel jack AC adapter with 1 territory-specic plug
USB communication cable
Serial to USB converter cable
1 meter sampling hose with swivel tube connector
Lapel clip for sampling hose
Cross-platform microAeth® Manager software (for download via AethLabs website)
Manual (for download via AethLabs website)
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3.4. Consumables
MA200 Filter Tape Cartridge
The lter tape cartridges are custom designed for use in the microAeth® MA200. The lter tape cartridges
have PTFE lter material for collecting a 3 mm sample spot. Cartridges each contain 15 sampling locations.
MA300 / MA350 Filter Tape Cartridge
The lter tape cartridges are custom designed for use in the microAeth® MA300 and MA350. The lter tape
cartridges have PTFE lter material for collecting a 3 mm sample spot. Cartridges each contain 85 sampling
locations.
3.5. Accessories
microCyclone™ PM2.5 Size-selective inlet
The microCyclone is a miniature PM2.5 size-selective inlet for the microAeth. This sharp-cut cyclone has a
size cut of 2.5 micron at 50 ml/min and 1.6 micron at 100 ml/min.
microAeth MA Series Flow Calibration Kit
The microAeth MA Series Flow Calibration Kit comes with all of the components necessary to reliably perform
a ow calibration of the microAeth® MA Series instruments. This kit includes a custom designed external
mass owmeter and all necessary tubing, connectors, and cables to perform the simple and fully automated
ow calibration. The only way to perform a ow calibration on the MA Series instruments is to use the
AethLabs MA Series Flow Calibration Kit.
Portable Aerosol Dryer
A small, portable, passive naon / dessicant aerosol dryer. Dessicant life of 500 liters before recharge or
replacement.
Serial to bare leads cable
This cable allows the microAeth MA Series instruments to send and receive 3.3v TTL serial data from the
4-pin serial port to and from other devices. This cable is not included.
MA350 Sealed connector to bare leads cable
This cable allows the microAeth MA350 to send and receive 3.3v TTL serial data to and from other devices.
This cable also allows the MA350 to be powered from an external source. This cable is not included.
3.6. Replacement Parts
microAeth MA Series Flow Calibration Kit Communication cable
This cable allows the microAeth MA Series instruments to communicate with the custom designed external
mass owmeter in the microAeth MA Series Flow Calibration Kit. This cable is included in the microAeth MA
Series Flow Calibration Kit.
microAeth MA Series Flow Calibration Kit Inlet lter
This low backpressure inline disc lter is used on the inlet of the external owmeter of the microAeth MA
Series Flow Calibration Kit to keep the external owmeter clean and to keep the microAeth sampling lter
clean during ow calibration. An inline lter isn't required but is recommended especially if a ow calibration
is being completed outdoors or in a dirty environment.
Serial to USB converter cable
This cable allows the microAeth MA Series instruments to send and receive serial data from the 4-pin serial
port to the USB port of a computer. This cable is also used to upgrade the rmware of microAeth MA Series
instruments. This cable is included with all MA Series instruments.
MA350 Sealed connector to DC barrel jack and serial port cable
This cable converts the microAeth MA350 sealed connector port to a DC barrel jack port and a 4-pin serial
port. This cable is included with the MA350.
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4. Measurements
4.1. Particles
The microAeth MA Series instruments make real-time ve wavelength optical analyses by measuring the
rate of decrease in transmitted light through the sample lter, due to continuous particle deposition on the
lter. Measurement at 880 nm is interpreted as the concentration of Black Carbon (‘BC’). Measurement at
375 nm is interpreted as Ultraviolet Particulate Matter (‘UVPM’) indicative of woodsmoke, tobacco, and or
biomass burning. Measurements at 625 nm, 528 nm, and 470 nm wavelengths provide additional information
about the aerosol, and allow for the calculation of the angstrom exponent which can be used for source
apportionment and other atmospheric investigations.
4.1.1. DualSpot®Loading Compensation (beta)
The microAeth MA Series instruments include hardware and rmware that implement the patented
DualSpot® Loading Compensation method. This method simultaneously collects aerosol samples on two
analysis spots in parallel and at different face velocities while measuring the rate of change in absorption
of transmitted light due to the particles loading on the lter. The use of this method is an optional user
selectable feature. A ow rate of 100 or 150 ml/min is highly recommended when using DualSpot®
loading compensation. Although DualSpot mode can be used in many sampling scenerios, for best results
it should be used in stationary applications.
4.2. Temperature
A temperature measurement of the sample air stream is made every Timebase. The sensor value for this
measurement is very close to both the lter sampling locations and the internal mass owmeters. The
datastream from this sensor is representative of the internal temperature of the sample air and while it may
track changes in external air temperature, it may have a temperature offset compared with actual external
ambient air temperature due to internal heating or cooling of the instrument. This sensor value is always
recorded. In the data output, this value is recorded in the column labeled “Sample temp (C).” The accuracy of
the temperature measurement is typically ± 0.2 °C.
A temperature measurement of the internal chassis of the instrument is made every Timebase. This sensor
value is always recorded. In the data output, this value is recorded in the column labeled “Internal temp
(C).” The accuracy of the temperature measurement is typically ± 1 °C at 25 °C and typically ± 3 °C over the
temperature measurement range of -40 to +85 °C.
4.3. Relative Humidity and Dewpoint
A relative humidity measurement of the sample air stream is made every Timebase. This sensor is coupled to
measurement sample spot sense2. In SingleSpot™ mode there is no active ow through the humidity sensor,
while in DualSpot® mode there is active ow through the humidity sensor. Therefore the measurement will be
more accurate and more responsive in DualSpot® mode. This sensor value is always recorded. In the data
output, this value is recorded in the column labeled “Sample RH (%).” The accuracy of the relative humidity
measurement is typically ± 1.8 %RH between 10-90 %RH at 25 °C.
A dewpoint calculation is made by the instrument every Timebase. This value is always calculated and
recorded using the temperature and relative humidity senors measurements. In the data output, this value is
recorded in the column labeled “Sample dewpoint (C).”
4.4. Altimeter/Barometer
A pressure measurement of the internal chassis of the instrument is made every Timebase. This sensor is
always recorded. In the data output, this value is recorded in the column labeled “Internal pressure (Pa)” The
accuracy of the absolute pressure measurement is typically ± 0.4 kPa at test conditions of 50 to 110 kPa over
−10 °C to 70 °C.
4.5. Accelerometer
A 3-axis acceleration measurement of the internal chassis of the instrument is made every Timebase. This
sensor is always recorded. In the data output, this value is recorded in the columns labeled “Accel X,” “Accel
Y,” and “Accel Z.”
4.6. GPS
The microAeth has access to the Global Positioning System with a built-in antenna. The GPS is used for
precise, automatic time synchronization and for optional location tracking.
4.7. Flow
Two separate mass owmeters each make ow measurements of the sample air stream and are recorded
every Timebase. These sensor measurements are always recorded and represent the average ow through
the timebase period (not instantaneous). In the data output, these values are recorded in the column labeled
“Flow total (mL/min)” and “Flow1 (mL/min).” The accuracy of the ow measurements is typically ± 5% FS 0-1
L/min (25 °C characteristic). The repeatability of the flow measurements is typically ±0.4% FS 0-1 L/min.
When the instrument has DualSpot loading compensation enabled, a ow calculation is made by the
instrument every Timebase. This value is always calculated and recorded. In the data output, this value is
recorded in the column labeled “Flow2 (mL/min).”
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5. Configuration and Operation
5.1. Overview
The microAeth MA Series instruments are highly sensitive, portable, and miniature ve-wavelength
instruments designed for measuring the light absorbing carbon (‘LAC’) particles. The instruments have an
880 nm optical channel which is primarily interpreted as Black Carbon (‘BC’). The instruments also measure
Ultraviolet Particulate Matter (‘UVPM’) and makes measurements at three other wavelengths which can be
used to calculate the angstrom exponent for source apportionment or other investigations into the optical
properties of light absorbing particles in the atmosphere. The instruments are based on the well-established
Aethalometer® measurement principle used for over 30 years in laboratory-sized analyzers and incorporate
the patented DualSpot® loading compensation method. The microAeth draws an air sample at a ow rate
of 50, 100, or 150 ml/min through a 3 mm diameter portion of the lter media. Optical transmission through
the ‘Sensing’ spot is illuminated by stabilized 880 nm (IR), 625 nm (Red), 528 nm (Green), 470 nm (Blue), and
375 nm (UV) LED light sources and measured by a detector. The optical attenuation (ATN) due to absorbance
of particles collected on the spot is measured relative to an adjacent ‘Reference’ portion of the lter where
no particles are accumulated. This change in ATN is derived using a starting measurement and an additional
measurement at the end of the timebase period. The gradual accumulation of optically-absorbing particles
leads to an increase in ATN from one period to the next. The air ow rate through the spot is measured by one
or more mass ow sensor(s) which are also used to stabilize the pump. The electronics and microprocessor
measure and store the data each timebase period to determine the ATN increment during each timebase. This
is then converted to a mass concentration of BC expressed in nanograms per cubic meter (ng/m³) using the
known optical absorbance per unit mass of Black Carbon material. The instrument’s operating parameters are
set up by an external software application or by the on-board interface. Operation is completely automatic
after the instrument is turned on and sampling is started. During operation, the microprocessor performs
the optical measurements, measures and stabilizes the air ow, calculates the BC mass concentration
and records data to internal nonvolatile memory. The data may be downloaded at a later time by the same
external software package or over serial. The microAeth derives its power from an internal rechargeable
lithium-ion battery.
5.2. Recommendations for Best Use Practices
The small size and light weight of the microAeth® allow it to be used to gather data in a wide range of
operational scenarios, not always possible using larger instruments. Optimization of performance across the
breadth of applications requires an understanding of scientic objectives, operational settings, their impact
on instrumental sensitivity and trade-offs, as well as proper maintenance of the instrument. The following
recommendations provide general guidelines.
5.2.1. Instrument Settings: Measurement Timebase and Flow Rate
In order to get the best data from the microAeth for a sampling campaign, we highly recommend that the
instrument warm up for approximately 30 minutes so that it can equilibrate. The microAeth can acquire
data on six timebase settings: 1, 5, 10, 30, 60, or 300 seconds. The 1 second timebase should only be
used under special circumstances where a decreased signal-to-noise ratio is acceptable. At this setting,
instrumental noise is larger and typically requires post-processing. The microAeth pump can operate at
three sampling ow rate settings: 50, 100, and 150 ml/min. The choice of these parameters affects the
operation and data. On a 1 second timebase, the instrument will acquire about 25 megabytes of data per
day, which may be more challenging to handle and take longer to download. Due to the ow split between
Spot 1 and Spot 2 the measurement sensitivity in DualSpot® mode will be lower than in SingleSpot™
mode for the same total ow rate. DualSpot mode may not be compatible with 50 ml/min ow rate unless
measuring higher mass concentrations.
5.2.2. Battery Runtime on Single Charge
Battery Runtime on Single Charge: Affected by ow rate and timebase settings.
NOTE: Battery life will gradually diminish after many cycles (~ 1 year of use). Runtimes vary based on
individual microAeth instruments and specic environments.
5.2.3. Effects of Contamination
Effects of Contamination, Vibration, and Impact: Primarily affected by timebase setting.
1 second 5 seconds 10 seconds 30 seconds 60 seconds 300 seconds
very large large large moderate low least
5.2.4. Recommended Settings for Different Scenarios
Different Black Carbon measurement scenarios require different operational settings for optimum
performance. The 1 second timebase setting is a ‘Data Acquisition Mode’ intended for subsequent
processing, and should NOT be used for routine monitoring. On a 1 second timebase, the instrument will
acquire about 25 megabytes of data per day, which may be more challenging to handle and take longer to
download. Data collected on a 1 second timebase should always be smoothed or averaged over longer
periods, in order to optimize the signal-to-noise ratio at the desired time resolution.
5.2.5. Contamination, Maintenance, and Cleaning of Sample Chamber
If a loose particle of contamination enters the sample chamber of the microAeth or the instrument
experiences vibration or impact, the data may be degraded. Shaking or tapping a “dirty” instrument may
create data excursions that are far larger than those of a “clean” unit. These effects are amplied greatly
at the shorter timebase settings. Our recommendations for cleaning are based upon the likelihood of
contamination and the nature of use.
5.2.7. Contamination Probability for Various Use Scenarios
Sampling Scenario without use of microCyclone™Contamination Probability
Dry, dusty environment High
Occupational settings with combustion exhaust High
Exposure to “oily” smokes such as biomass-burning plumes,
2-cycle engine exhaust High
Presence of suspended uff, bers, pollen High
Immediate vicinity of trafc and roadways High
Outdoor urban environments High
Outdoor rural environments (without dust, uff, pollen) High
Residential indoor environments High
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5.2.8. Recommended Cleaning & Maintenance Intervals
It is suggested to perform standard maintenance at least once per 12-18 months. Unique, dirtier and or
higher concentration sampling environments and applications may require standard maintenance on more
regular intervals. It is recommended that users plan standard maintenance schedules that best coincide
with and allow for the best data quality during measurement campaigns.
5.2.9. microCyclone™PM2.5 Size-selective inlet
The microCyclone™ may help to prevent contamination in dusty or dirty environments where larger
diameter particles are present. The microCyclone PM2.5 Size-selective inlet can be connected to the inlet
of the microAeth to provide a PM2.5 size cut point when the microAeth is set to a 50 ml/min ow rate. A 1.6
micron size cut point is provided by the microCyclone when connected to a microAeth with a 100 ml/min
ow rate. The microCyclone may not be appropriate for use with the microAeth MA200, MA300, or MA350
when using specic operating settings depending on ow rates and if DualSpot® loading compensation
is enabled. The microCyclone can be used at 100 ml/min with a outpoint of 1.6 micron in DualSpot mode.
While operation at 50 ml/min in DualSpot mode may be possible it has not yet been validated.
IMPORTANT: If a microCyclone is being used with your microAeth, please clean it on a frequent
basis, depending on sampling environment and concentrations. Please see microCyclone manual and
documentation for more information.
5.3. Measurement Sampling Connections
5.3.1. Inlet Port
The inlet port is a 10-32 UNF inch threaded port.
The inlet port and all connections to the inlet port must be properly protected from the environment. There
must be limited restriction to ow while protection from water, insects, bugs, and other objects that can
block or inltrate the instrument air pathway. Extra precaution must be taken as the internal pump of the
instrument is pulling air into the instrument through this port.
It is always recommended to use the sampling tube assembly supplied with your microAeth, screwed
into the instrument's inlet port. Using this sampling tube assembly allows for more targeted sampling,
can provide basic protection to the instrument inlet, and prevents the possibility of light leakage into the
instrument's sample chamber.
5.3.2. Outlet Port
The outlet port is a 10-32 UNF inch threaded port.
The outlet port and all connections to the outlet port must be properly protected from the environment.
There must be limited restriction to ow while protection from water, insects, bugs, and other objects that
can block or inltrate the instrument air pathway.
5.4. Power
5.4.1. Charging
Input: 100~240 VAC 50/60Hz 0.4A, Output: 5VDC / 2A, with option for Type A, C, G, or I plug
It is highly recommended to use the DC barrel jack for charging and power. Power via USB may
introduce additional noise to measurement data.
Charging times with instrument turned off:
MA200:
Fast charging DC via barrel jack AC adapter: ~3 hours
USB charging: ~6.5 hours
MA300:
Fast charging DC via barrel jack AC adapter: ~11.75 hours
USB charging: ~25.75 hours
MA350:
Sealed connector for fast charging DC via barrel jack AC adapter: ~11.75 hours
USB charging on inside panel: ~25.75 hours
5.4.2. Turn on
The on-board user interface on the front of the microAeth can be used to turn on the instrument.
1) To turn on the microAeth, press and hold only one of the three buttons for 2 seconds. The screen and
instrument will turn on and the instrument serial number will be displayed.
5.4.3. Turn off
The on-board user interface on the front of the microAeth can be used to turn off the instrument.
1) Use the left and right buttons to scroll through the top level menu options to ‘Turn Off’.
2) Press the center button to select the ‘Turn Off’ option. The screen and instrument will turn off.
5.5. Communication
5.5.1. On-board user interface
The microAeth has an on-board user interface with a backlit low power screen and three buttons.
5.5.2. USB 2.0
The microAeth has a USB 2.0 full speed port for communication with the cross-platform microAeth®
Manager software for conguring the instrument settings and downloading data.
The AethLabs provided mini-B to Type A USB cable can provide communication and power to and from the
device, although it is not recommended for providing power to the microAeth while making measurements.
A USB connection to a computer running the microAeth Manager software can be used to communicate
with the device. Charging through the USB port is at a slower rate than the barrel jack AC adapter. It is
highly recommended to use the DC barrel jack for charging and power while making measurements.
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5.5.3. 3.3V TTL Serial
The microAeth has a 4-pin serial port for communication through 3.3V TTL serial with external data
acquisition systems or for direct integration into another system.
Communication though the 3.3V TTL serial port can be established to a computer through a terminal
emulator using the custom AethLabs 4-pin Serial to USB converter cable. AethLabs only supports Tera
Term for Windows. The default terminal emulator settings and terminal emulator settings required for
updating rmware in the bootloader are as follows:
Baud Rate Data Parity Stop Flow control
1000000 8 bit none 1 bit none
(Xon/Xoff for rmware update)
NOTE: The serial baud rate can be changed using the on-board LCD interface and the Change Serial Baud
menu or using the microAeth Manager and the Baud rate setting under Serial and Communications. When
installing rmware using the instrument bootloader, the baud rate is always 1000000 even if the baud rate
setting has been changed.
Before using the AethLabs 4-pin Serial to USB converter cable, it may be required to install drivers
from Future Technology Devices International Ltd. (FTDI) in order for the converter cable to be
recognized by and used with the computer.
A bare leads serial cable is available from AethLabs for custom integration work.
CAUTION: Interfacing to the serial port for customization and integration requires care, a short of the
power supply or improper grounding practices could cause additional instrument noise and / or in
the case of a short circuit or over-voltage / over-current, damage to the instrument.
5.5.4. Wi-Fi
The microAeth has 802.11b Wi-Fi with AES hardware encryption built-in.
5.5.5. Bluetooth Low Energy
The microAeth has Bluetooth Low Energy built-in.
5.6. Instrument Operating Parameters
5.6.1. Date/Time: GPS time synchronization (microAeth Manager only)
The time on the microAeth can be automatically synchronized to satellites using its on-board GPS unit.
Time synchronization will automatically occur even if the GPS setting is turned off and location is not being
recorded. Time is ISO 8601 formatted.
It is very important to conrm the date and time of the microAeth before a sampling campaign.
5.6.1. Date/Time: Application time synchronization (microAeth Manager only)
The time on the microAeth can be manually synchronized to the time on the computer. Time
synchronization will occur between the microAeth and the computer when the button is clicked in the
microAeth Manager. Time is ISO 8601 formatted.
It is very important to conrm the date and time of the microAeth before a sampling campaign.
5.6.2. Date/Time: Timezone offset (microAeth Manager only)
The timezone offset setting permits the user to select a timezone offset from Coordinated Universal
Time (UTC) to be used as part of the ISO 8601 time and date format in the instrument and recorded
with instrument measurement data. Daylight savings time offsets are not automatically adjusted by the
instrument or the microAeth Manager.
5.6.3. Flow setpoint
The sampling ow setpoint setting permits the user to select a sampling ow rate setpoint of 50, 75,
100, 125 or 150 ml/min. A ow rate of 100, 125 or 150 ml/min is highly recommended when using
DualSpot® loading compensation. It is recommended to use lower ow rates in areas with high
BC concentrations, and higher ow rates when maximum sensitivity is required in areas of low BC
concentrations. A lower ow rate should also be selected for longer run times and extended battery life.
Please read section 5.2 Recommendations for Best Use Practices for more information.
5.6.4. Timebase
The timebase setting permits the user to select a measurement integrating time of 1, 5, 10, 30, 60, or 300
second(s). The date and time (timestamp) is recorded at the end of the sampling and measurement interval.
It is recommended to use a 30 or 60 second timebase for most ‘human exposure’ or ‘ambient monitoring’
measurements. Faster timebases will result in higher noise, and are most useful either for direct source
monitoring (tailpipe analysis) or for other applications requiring extremely rapid data. A 300 second
timebase can be selected for longer run times and extended battery life. Please read section 5.2
Recommendations for Best Use Practices for more information.
5.6.5. Wavelengths (microAeth Manager only)
The wavelengths setting permits the user to select the measurement wavelength(s) used for particle
measurements.
1 Wavelength: IR (880 nm)
2 Wavelengths: IR (880 nm), UV (375 nm)
5 Wavelengths: IR (880 nm), Red (625 nm), Green (528 nm), Blue (470 nm), UV (375 nm)
5.6.6. Sampling mode (microAeth Manager only)
The sampling mode setting permits the user to select if the microAeth is in SingleSpot™ or DualSpot®
loading compensation sampling mode. A ow rate of 100 , 125 or 150 ml/min is highly recommended
when using DualSpot® loading compensation. Although DualSpot mode can be used in many sampling
scenerios, for best results it should be used in stationary applications.
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5.6.7. AutoSample
The AutoSample setting permits the user to select if the microAeth will automatically start sampling and
measurements.
Off: Automatic start of sampling and measurements will not occur.
Resume after power loss (Resume): If the instrument was previously sampling and experienced a power
failure. If this setting is on, the instrument will automatically start sampling and measurements when it turns
on from a loss of power or some other event that caused the instrument to turn off.
External power control (Ext Power): If the 5V barrel jack of the instrument is supplied with power, the
instrument will automatically turn on and start sampling and measurements. If power is removed from the
5V barrel jack of the instrument, the instrument will automatically stop sampling and measurements and
turn off.
5.6.8. GPS (microAeth Manager only)
The GPS setting permits the user to select if GPS location recording is turned on or off.
5.6.9. Serial baud rate
The serial baud rate setting permits the user to select the serial baud rate of 57600, 115200, 230400,
460800, 921600, or 1000000 to use when measurement data is transmitted through the serial port.
NOTE: When installing rmware using the instrument bootloader, the baud rate is always 1000000 even if
the baud rate setting has been changed.
5.6.10. Serial data mode
The serial data mode setting permits users to select the serial data mode of the serial port. The following
three options are available:.
Off: No measurement data will be transmited via the serial port. On-board user interface data and the
output of Display All Settings and Display FlowCal Info will still be transmitted when selected and at startup.
Streaming: Measurement data will be transmited via the serial port while sampling and measurements are
occuring. On-board user interface data and the output of Display All Settings and Display FlowCal Info will
still be transmitted when selected and at startup.
Polled: Measurement data and instrument status can be polled and the operating controls of the instrument
can be controlled using the command line inferface (CLI) via the serial port. See section 5.9. Command Line
Interface (CLI) for Polled Serial Data Mode for CLI commands. On-board user interface data and the output
of Display All Settings and Display FlowCal Info will still be transmitted when selected and at startup.
5.6.11. Serial data format (microAeth Manager only)
The serial data format setting permits the user to select the serial data format of the serial port of
measurement data in streaming and polled serial data modes. Two format options are available: Verbose
and Minimal. For more information about serial output formating structures, see section 6.2. Serial Output
Format Structures.
5.6.12. Tape advance ATN threshold
The tape advance ATN threshold setting permits the user to enter the attenuation (ATN) threshold natural
number value of 1 to 100 that will trigger an automatic tape advance to a new lter sampling location during
a sampling and measurement period. The attenuation (ATN) threshold value will trigger a tape advance
when the rst of the wavelength measurements reaches this threshold.
NOTE: The lowest wavelength light source enabled will typically trigger the attenuation (ATN) tape advance.
5.7. Using the microAeth Manager Software
5.7.1. microAeth Manager Software Installation
The microAeth Manager for macOS® and Windows® is available for download from the AethLabs website
at https://aethlabs.com/microaeth/software. Before instrallation, check with the computer’s system
administrator to make sure that the correct permissions have been granted on the computer to install and
run a new application. Please visit the AethLabs website for more information and to sign up for software
announcements and to receive notications of software and rmware updates.
Before installing or upgrading microAeth Manager, make sure to export and backup all data stored in
the microAeth Manager local database.
5.7.1.1. Installation on macOS
1) Delete any previous versions of the microAeth Manager from the computer.
2) Download the microAeth Manager software to the computer running macOS®.
3) Locate and open the le ‘microAeth_Manager_x.xx.dmg’ on the computer.
4) The virtual disk image will be mounted and a window will open showing the ‘microAeth Manager’
application le.
5) Drag the ‘microAeth Manager’ application le to the ‘Applications’ folder of the computer. The
application is now installed and ready for use with the microAeth MA series instruments.
6) When the microAeth Manager is rst opened after installation on the computer, a prompt may appear
with the following message and verication request, ‘“microAeth Manager” is an application downloaded
from the Internet. Are you sure you want to open it?’ Please conrm to start using the application.
5.7.1.2. Installation on Windows
1) Delete any previous versions of the microAeth Manager from the computer.
2) Download the microAeth Manager software to the computer running Windows®.
3) Locate and open the le ‘microAeth_Manager_x.xx.exe’ on the computer.
4) A prompt may appear with the following message and verication request, ‘Do you want to allow this
app from an unkown publisher to make changes to your device?’ Please conrm to start the installation
wizard.
5) The microAeth Manager installation wizard will guide the user through the process of choosing
the application installation location, creating a desktop shortcut icon, and opening the Device Driver
Installation Wizard for installing USB drivers required for the computer to communicate with the
microAeth MA series instruments.
6) A prompt may appear with a message and verication request to install the USB device software or
drivers required. Please conrm and complete both installation wizards.
7) The application is now installed and ready for use with the microAeth MA series instruments.
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5.7.2. Overview
The microAeth Manager software is designed for use with microAeth MA series instruments only. The
microAeth Manager is intended to help with the conguration and management of the microAeth MA series
instruments and their collected data. Only one microAeth can be connected to the computer and microAeth
Manager software at a time. Plug in the USB cable to the USB port of the microAeth. Plug in the USB A
connector of the cable into a computer where the microAeth Manager is installed. Turn on the microAeth
MA series instrument and open the microAeth Manager. The instrument serial number and name will appear
in the microAeth Manager device section of the main application window and then the instrument can be
congured and its data can be downloaded and managed through the application.
5.7.2.1. Main Application Window
The microAeth Manager main application window consists of three sections: Manage, Notications, and
Device Section.
5.7.2.1.1. Manage Application Button and Section
Clicking the ‘Manage application’ button in the top right of the main application window will toggle
open and close the Manage application section where the user can manage general settings and nd
out more information about the application.
The ‘Info’ button and the application version are in the top right of the ‘Application settings’ section. If
the ‘Info’ button is clicked, a window will appear with more detailed information about the application,
legal notices, a link for checking for available microAeth Manager updates, and a link to the AethLabs
website. To check if updates of the microAeth Manager are available, click the 'Check for
updates' button. A web browser will open and take you to the AethLabs website for more information
about the latest version available of the microAeth Mansger.
The 'Show 24 hour format' toggle in the 'Application settings' section can be used to change the time
formatting in the application.
The ‘Clear database’ button in the ‘Local database’ section in the top right allows the user to delete
all data previously downloaded from microAeth MA series instruments and currently stored in the
microAeth Manager application local database. If the ‘Clear database’ button is clicked, a window will
appear to conrm if the user would like to delete all data in the application database. The user must
conrm by typing in ‘DELETE’ and clicking the ‘Delete all data in the application database’ button.
ONCE THIS ACTION IS COMPLETED, IT IS NOT REVERSIBLE. Clearing and deleting the data
in microAeth Manager local database does not delete data stored on a microAeth MA series
instrument. It only deletes the data that was previously downloaded and stored in the microAeth
Manager local database on that specic computer. AethLabs recommends regularly deleting the
data in the microAeth Manager local database as the time it takes to access the microAeth Manager
local data base through the 'Manage data' button will increase as the data base size increases.
5.7.2.1.2. Notifications Section
The notications section displays notications in the expandable and collapsible log. Clicking the ‘View
all notications’ button on the right of the main application window will toggle open the notications log.
Clicking the same button labeled ‘Collapse notications’ will collapse the notications log to display the
single latest notication.
5.7.2.1.3. Device Section
The device section displays the interface for conguring settings, downloading data, and managing
data from microAeth MA series instruments. This area will display ‘Looking for connected devices’ and
a searching animation when no microAeth MA series instruments are connected and or communicating
with the microAeth Manager.
When a microAeth MA series instrument is connected and communicating with the microAeth Manager,
the section ‘Local devices’ and the instrument device pane for the specic connected microAeth MA
series instrument will appear below.
The name and serial number of the instrument are displayed in the top left of the instrument device
pane title bar. The name of the instrument can be edited by clicking on the name of the instrument in
the device pane title bar.
The USB icon and device pane toggle button are displayed in the top right of the instrument device
pane title bar. The USB icon will display green when the instrument is connected with the microAeth
Manager. The device pane toggle button with the vertical arrow in it, located in the far right of the
instrument device pane title bar, is used to expand and collapse the device pane. The device pane
displays status, settings, and data information for the connected instrument.
5.7.3. Configuration and Status of Instrument and Operating Parameters
The microAeth Manager software can be used to only congure microAeth MA series instruments when
the microAeth is connected to the computer. Only one microAeth can be connected to the computer and
microAeth Manager software at a time. Plug in the USB cable to the USB port of the microAeth. Plug in the
USB A plug of the cable into a computer where the microAeth Manager is installed. Turn on the microAeth
MA series instrument and open the microAeth Manager. The instrument serial number and name will appear
in the microAeth Manager device section of the main application window and then the instrument can be
congured through the microAeth Manager device pane.
5.7.3.1. Battery
The microAeth Manager displays the percentage of battery remaining in the microAeth.
5.7.3.2. Status
The microAeth Manager displays the current status of the microAeth.
5.7.3.3. Date/Time
The microAeth Manager displays the current date, time, and timezone offset of the microAeth. Click the
‘Time options’ button to show the ‘Change time options’ window to modify date and time settings.
5.7.3.3.1. GPS time synchronization
The GPS time synchronization toggle switch in the ‘Change time options’ window of the microAeth
Manager (click the ‘Time options’ button on the main application window), can be used to turn GPS
time synchronization on or off.
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5.7.3.3.2. Application time synchronization
The application time synchronization ‘Sync now’ button in the ‘Change time options’ window of the
microAeth Manager (click the ‘Time options’ button on the main application window), can be used
to manually synchronize the time of the microAeth and the computer. When time is synchronized, a
conrmation notication will be displayed below the button in this window.
5.7.3.3.3. Timezone offset
The timezone offset dropdown and ‘Set timezone offest’ button in the ‘Change time options’ window of
the microAeth Manager (click the ‘Time options’ button on the main application window), can be used
to select and set a timezone offset from Coordinated Universal Time (UTC) to be used as part of the ISO
8601 time and date format in the instrument and recorded with instrument measurement data. Daylight
savings time offsets are not automatically adjusted by the instrument or the microAeth Manager. Select
the desired value from the dropdown and click the button ‘Set timezone offset’ to save. When the
timezone offset is saved, a conrmation notication will be displayed below the button in this window.
5.7.3.4. Memory
The microAeth Manager displays the percentage of memory available in the microAeth. The microAeth
has 16GB of memory which can store 31,250,000 data lines.
1 second timebase: 361 days of data
5 second timebase: 4.95 years of data
10 second timebase: 9.90 years of data
30 second timebase: 29.72 years of data
60 second timebase: 59.45 years of data
300 second timebase: 297.27 years of data
AethLabs recommends regularly deleting data on the microAeth as all unsynchronized data is
downloaded together from the microAeth to the microAeth Manager local database on each different
computer.
5.7.3.5. Firmware
The microAeth Manager displays the operating system rmware version running on the microAeth.
5.7.3.6. Flow setpoint
The ow setpoint dropdown can be used to select a sampling ow setpoint of 50, 75, 100, 125 or 150
ml/min. Select the desired value from the dropdown and click the checkmark to save and the ‘x’ to
cancel. A ow rate of 100, 125 or 150 ml/min is highly recommended when using DualSpot® loading
compensation.
5.7.3.7. Timebase
The timebase dropdown can be used to select the measurement integrating time of 1, 5, 10, 30, 60, or
300 second(s). Select the desired value from the dropdown and click the checkmark to save and the ‘x’ to
cancel.
5.7.3.8. Wavelengths
The wavelengths dropdown can be used to select the measurement wavelength(s) used for particle
measurements. Select the desired value from the dropdown and click the checkmark to save and the ‘x’
to cancel.
1 Wavelength: IR (880 nm)
2 Wavelengths: IR (880 nm), UV (375 nm)
5 Wavelengths: IR (880 nm), Red (625 nm), Green (528 nm), Blue (470 nm), UV (375 nm)
5.7.3.9. Sampling mode
The sampling mode dropdown can be used to select if the instrument is in SingleSpot™ or DualSpot®
loading compensation sampling mode. Select the desired value from the dropdown and click the
checkmark to save and the ‘x’ to cancel. A ow rate of 100 or 150 ml/min is highly recommended
when using DualSpot® loading compensation. Although DualSpot mode can be used in many sampling
scenerios, for best results it should be used in stationary applications.
5.7.3.10. AutoSample
The AutoSample dropdown can be used to select the autosample mode. Select the desired value from
the dropdown and click the checkmark to save and the ‘x’ to cancel.
Off: Automatic start of sampling and measurements will not occur.
Resume after power loss (Resume): If the instrument was previously sampling and experienced a
power failure. If this setting is on, the instrument will automatically start sampling and measurements
when it turns on from a loss of power or some other event that caused the instrument to turn off.
External power control (Ext Power): If the 5V barrel jack of the instrument is supplied with power, the
instrument will automatically turn on and start sampling and measurements. If power is removed from the
5V barrel jack of the instrument, the instrument will automatically stop sampling and measurements and
turn off.
5.7.3.11. GPS
The GPS toggle switch can be used to turn GPS recording on or off.
5.7.3.12. Serial baud rate
The serial baud rate dropdown can be used to select the serial baud rate for all data transmitted through
the serial port. Select the desired value from the dropdown and click the checkmark to save and the ‘x’ to
cancel.
NOTE: When installing rmware using the instrument bootloader, the baud rate is always 1000000 even if
the baud rate setting has been changed.
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5.7.3.13. Serial data mode
The serial data mode dropdown can be used to select the serial mode of the serial port. Select the
desired value from the dropdown and click the checkmark to save and the ‘x’ to cancel.
Off: No measurement data will be transmited via the serial port. On-board user interface data and the
output of Display All Settings and Display FlowCal Info will still be transmitted when selected and at
startup.
Streaming: Measurement data will be transmited via the serial port while sampling and measurements
are occuring. On-board user interface data and the output of Display All Settings and Display FlowCal Info
will still be transmitted when selected and at startup.
Polled: Measurement data and instrument status can be polled and the operating controls of the
instrument can be controlled using the command line inferface (CLI) via the serial port. See section 5.9.
Command Line Interface (CLI) for Polled Serial Data Mode for CLI commands. On-board user interface
data and the output of Display All Settings and Display FlowCal Info will still be transmitted when selected
and at startup.
5.7.3.14. Serial data format
The serial data format dropdown can be used to select the serial data format when serial data streaming
is turned on. Select the desired value from the dropdown and click the checkmark to save and the ‘x’ to
cancel.
For more information about serial output formating structures, see section 6.2. Serial Output Format
Structures.
5.7.3.15. Tape advance ATN threshold
The tape advance ATN threshold eld can be used to enter the attenuation (ATN) threshold natural
number value of 1 to 100 that will trigger an automatic tape advance to a new lter sampling location
during a sampling and measurement period. The attenuation (ATN) threshold value will trigger a tape
advance when the rst of the wavelength measurements reaches this threshold. Enter the desired value
into the eld and click the checkmark to save and the ‘x’ to cancel.
NOTE: The lowest wavelength light source enabled will typically trigger the attenuation (ATN) tape
advance.
5.7.4. Data Sessions Management in the microAeth Manager
Management of data both stored on the microAeth and data stored in the microAeth Manager local
database can be completed through the Manage data window of the microAeth Manager. Data is
downloaded from the instrument via the USB port ans is stored in the microAeth Manager local database.
The downloaded data is divided into data sessions in the microAeth Manager local database based on
previous sampling and measurements completed with the instrument. A data session is created when
the instrument starts sampling and measurements and the data session is closed when the instrument
sampling and measurements are stopped. The downloaded data sessions can then be exported to one .csv
le per session using the ‘Data sessions in application’ section of the Manage data window. Individual or
multiple data sessions can be selected and exported. When exporting long data sessions that span multiple
calendar days, the user can select to have the exported data session les split into multiple les based on
the calendar days of that session.
Data session les are exported to a folder named with the instrument serial number (MAxxx-xxxx) in the
directory shown at the bottom of the Manage data window below the ‘Export selected sessions’ button and
to the right of the text ‘Data le export location:’ The data le export directory is located in the computer
operating system user directory ‘/Documents/AethLabs_microAeth_Manager_Data’.
Session data les are exported as .csv les with the following naming system:
MAxxx-xxxx_Szzzz_yymmddhhmmss
xxx-xxxx is the serial number of the instrument
zzzz is the session ID number
yymmddhhmmss is the year, month, day, hour, minute, and second of when the session started
Session data les that are split into multiple les based on the calendar days of that session are exported
as .csv les with the following naming system:
MAxxx-xxxx_Szzzz_Pv_yymmddhhmmss
xxx-xxxx is the serial number of the instrument
zzzz is the session ID number
v is the split session partial le number
yymmddhhmmss is the year, month, day, hour, minute, and second of when the split session partial le
started within the session
5.7.5. Data Download in the microAeth Manager
The microAeth Manager can be used to download data stored on the instrument via the USB port. Data can
be downloaded to the local database in the client application software using the USB cable provided by
AethLabs. Once the data stored on the microAeth is downloaded to the local microAeth Manager database
on the computer, the data can then be exported to .csv les. There are two locations in the microAeth
Manager to download data from a microAeth.
Option 1:
1) Plug in the USB cable to the USB port of the microAeth. Plug in the USB A plug of the cable into a
computer where the microAeth Manager is installed and where data will be downloaded.
2) Open microAeth Manager.
3) Turn on the microAeth.
4) The microAeth information will be loaded into the microAeth Manager instrument device pane.
5) If there is new data stored on the microAeth that has not been downloaded to the microAeth Manager
local database, then the text ‘There are xxxx points of new data available to download’ and a ‘Download
now’ button will appear below the instrument device pane title bar where the name and serial number of the
instrument are displayed.
6) To download data from the instrument to the microAeth Manager local database, click the ‘Download
now’ button.
7) A window will appear with the title ‘Downloading data progress for MAxxx-xxxx’ and the ‘Current
Progress: xx%’ progress bar.
8) When the download is complete, the progress bar will change to ‘Data download is complete (xxxx
points)’ and the ‘Close’ button can be clicked to return to the main application window.
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