Met One Instruments LVS-100 User manual

USER MANUAL
metone.com
LVS -100
Low Volume Air Sampler
Version 1.6

Met One Instruments is now part of the Acoem Group. The Met One
range of gas analyzers was originally developed by Acoem under
the brand name Ecotech MicroVol 1100.
For the purposes of expediting the availability of Met One gas
analyzers to Met One customers around the world; Met One
Instruments have chosen to use the original Ecotech MicroVol
1100 operating manual.
Although the name of the Met One instrument is different, the
analyzer itself has remained unchanged and meets the strictest
quality and performance requirements expected of Met One
equipment. All the information presented in this manual is
current, including analyzer specifications and operating
principles.
Met One will update this manual to reflect the new branding
convention in due course.

MicroVol-1100 User manual 1.6 Front Matter
Manufacturers statement
Thank you for selecting the MicroVol-1100 Low flow-rate Air Sampler. The
MicroVol-1100 is designed primarily as a stand alone portable particulate sampler and
should give many years of trouble free service if installed, used and maintained
correctly. By following the guidelines contained in this manual and with the
implementation of a good quality-assurance program, the user can obtain accurate and
reliable particulate concentration data. Please ensure that you read the safety and
warranty details as they contain important information for the user. If, after reading
this manual you have any questions or you are still unsure or unclear on any part of
the NUT-1000 then please do not hesitate to contact Ecotech.
Ecotech also welcomes any improvements that you feel would make this a more
useable and helpful product then please send your suggestions to us here at Ecotech.
Please help the environment and recycle the
pages of this manual when finished using it.
Notice
The information contained in this manual is subject to change without notice. Ecotech
reserves the right to make changes to equipment construction, design, specifications
and /or procedures without notice.
Copyright © 2007. All rights reserved. Reproduction of this manual, in any form, is
prohibited without the written consent of Ecotech Pty Ltd.
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Front Matter MicroVol-1100 User manual 1.6
WARNING
Safety requirements
•To reduce the risk of personal injury caused by electrical shock, follow all
safety notices and warnings in this documentation.
•If the equipment is used for purposes not specified by Ecotech, the protection
provided by this equipment may be impaired.
•Replacement of any part should only be carried out by qualified personnel,
only using parts specified by Ecotech. Always disconnect power source before
removing or replacing any components.
ii

MicroVol-1100 User manual 1.6 Front Matter
Factory service/warranty
This product has been manufactured with care and attention.
The product is subject to a 12-month warranty on parts and labour. The warranty
period commences when the product is shipped from the factory. Consumable items
are not covered by this warranty.
To ensure that we process your factory repairs and returned goods efficiently and
expeditiously, we need your help. Before you ship any equipment to our factory,
please call your local Ecotech service response centre (or distributor) to obtain a
return authorisation number.
When you call please be prepared to provide the following information:
1. your name, telephone number and Facsimile number
2. Your company name
3. The model number or a description of each item
4. The serial number of each item, if applicable
5. A description of the problem or the reason you are returning the equipment
(eg, sales return, warranty return, etc)
If you are required to return the equipment an accompanying document with:
1. Your name, number and Facsimile number
2. Your company name with return shipment
3. The model number or a description of each item
4. The serial number of each item, if applicable
A description of the problem/reason you are returning the equipment
iii

Front Matter MicroVol-1100 User manual 1.6
Claims for Damaged Shipments and Shipping
Discrepancies
Damaged shipments
1. Inspect all instruments thoroughly on receipt. Check materials in the
container(s) against the enclosed packing list. If the contents are damaged
and/or the instrument fails to operate properly, notify the carrier and Ecotech
immediately.
2. The following documents are necessary to support claims:
a. Original freight bill and bill lading
b. Original invoice or photocopy of original invoice
c. Copy of packing list
d. Photographs of damaged equipment and container
You may want to keep a copy of these documents for your records also.
Refer to the instrument name, model number, serial number, sales order
number, and your purchase order number on all claims. Upon receipt of a
claim, we will advice you of the disposition of your equipment for repair or
replacement.
Shipping Discrepancies
Check all containers against the packing list immediately on receipt. If a shortage or
other discrepancy is found, notify the carrier and Ecotech immediately. We will not be
responsible for shortages against the packing list unless they are reported promptly.
iv

MicroVol-1100 User manual 1.6 Front Matter
Manual Revision History
Ecotech Manual ID: MAN 0040
Manual PN: ECO-MIC1100MAN
Current Revision: 1.6
Date released: May 2007
Description: User Manual for the MicroVol-1100
This manual is a newly created document for use of the MicroVol-1100 low flow-rate
air sampler.
Edition Date Summary Affected
Pages
1.0 November
2000 Release All
1.1 December
2000 Menu structure flow chart added 28
1.1a June 2001 Battery charger part number
changed 53
1.2 April
2003 Wind Direction Sensor drawing added 38, 35
Protection mode notes added 28,33
Flow-rate notes added 7-9, 13
Minor details 32, 34, 35
1.3 November
2003 V1.13 software changes – trigger input 2.4.2, 4.5.4.3
Size Select function 4.5.4
1.4 February
2006 Updated Downloader information and USB-RS232
adapter information
46-49
1.5 June 2006 General updates various
1.6 January
2007 New company details added, Manual redesigned All,
v

Front Matter MicroVol-1100 User manual 1.6
Table of Contents
1INTRODUCTION............................................................................................................1
1.1 ...................................................................................................................1DESCRIPTION
1.2 ..............................................................................................................3SPECIFICATIONS
1.2.1 .............................................................................................................3FLOW CONTROL
1.2.2 ...........................................................................................................3INLET ASSEMBLY
1.2.3 ............................................................................................3OPERATING ENVIVONMENT
1.2.4 .................................................................................3CONSTRUCTION AND DIMENSIONS
1.2.5 ............................................................................................................................4POWER
1.2.6 .................................................................................................................4ACCESSORIES
1.2.7 .................................................................................................4BATTERY PACK OPTION
1.3 ..............................................................................................................5NOMENCLATURE
1.4 ..................................................................................................6BACKGROUND/THEORY
1.4.1 ...............................................................................................6PARTICULATE SAMPLING
1.4.2 ...................................................7PRINCIPLE OF OPERATION OF SIZE SELECTIVE INLETS
1.5 .............................................................................................8INSTRUMENT DESCRIPTION
1.5.1 .....................................................................................................................9INLET TUBE
1.5.2 ........................................................................9FILTER HOLDER /IMPACTOR ASSEMBLY
2INSTALLATION...........................................................................................................10
2.1 .......10CONNECTING EQUIPMENT TO THE WIND SPEED AND DIRECTION INPUT PLUG
2.1.1 ..........................................................10CONNECTING A WIND SENSOR OR RAIN-GAUGE
2.1.2 ..............................11CONNECTING AN EXTERNAL TRIGGER FOR REMOTE ACTIVATION
2.2 ......................................11INSTALLING THE MICROVOL-1100 FOR INDOOR SAMPLING
2.3 .....................................11INSTALLING THE MICROVOL-1100 FOR OUTSIDE SAMPLING
2.4 ....................................................................................................12CONNECTING POWER
2.4.1 ..............................................................................................12MAINS POWER ADAPTOR
2.4.2 ..........................................................12CONNECTING POWER –BATTERY PACK OPTION
2.5 ............................................................................................13TRANSPORTING/STORAGE
2.6 .........................................................................13FILTER PREPARATION AND HANDLING
2.6.1 ...............................................................................14PRE-COLLECTION EQUILIBRATION
2.6.2 .......................................................................................................14FILTER EXCHANGE
2.6.3 .............................................................................15POST COLLECTION EQUILIBRATION
2.6.4 ..........................................................................................................15FINAL WEIGHING
3OPERATION..................................................................................................................17
3.1 ......................................................................................18HOW THE MICROVOL THINKS
3.2 ......................................................................17GENERAL OPERATIONAL INFORMATION
3.2.1 ........................................................................................................19MENU OPERATION
3.2.2 ........................................................................................20CHANGING MENU SETTINGS
3.3 .................................................................................................................21MAIN SCREEN
3.4 ....................................................................................................22MENUS AND SCREENS
3.4.1 ...........................................................................................................23STATUS SCREEN
3.4.2 ................................................................................................................24SETUP MENU
3.4.3 ............................................................................................................30MANUAL MENU
3.4.4 HIDDEN MENU..............................................................................................................45
3.5 ................................................................................................................30WIND SENSOR
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MicroVol-1100 User manual 1.6 Front Matter
3.6 ..................................................................................................................31RAIN GAUGE
4CALIBRATION.............................................................................................................33
4.1 ........................................................................33TEMPERATURE SENSOR CALIBRATION
4.2 ........................................................33BAROMETRIC PRESSURE SENSOR CALIBRATION
4.3 ...........................................................................................33FLOW RATE CALIBRATION
4.4 .......................................34PROCEDURE FOR RE-CALIBRATING THE MICROVOL-1100:
5COLLECTING DATA ..................................................................................................36
5.1 ............................................................36USING MICROVOL DOWNLOADER SOFTWARE
5.2 ........................39COMMUNICATING WITH THE MICROVOL (ALTERNATIVE METHOD)
5.3 ..............................................................................................................40CALCULATIONS
5.3.1 .........................................................................................................41SAMPLE VOLUME
5.3.2 ........................................................................41MASS CONCENTRATION CALCULATION
6MAINTENANCE...........................................................................................................42
6.1 ...................................................................................................42MAINTENANCE TOOLS
6.2 ............................................................................................42MAINTENANCE SCHEDULE
6.3 ........................................................................................42MAINTENANCE PROCEDURES
6.3.1 ............................................................................42CLEANING THE INLET COMPONENTS
6.3.2 ..................................................................................................43IMPACTOR ASSEMBLY
6.3.3 ....................................................................................................44PUMP MAINTENANCE
7TROUBLESHOOTING ................................................................................................47
8INSTRUCTIONS FOR ACCESSORIES AND OPTIONS........................................49
8.1 ..............................................................................................................49BATTERY PACK
8.2 ...................................................................................49CHARGING THE BATTERY PACK
8.3 .....................................................................................49DISPOSING OF OLD BATTERIES
8.4 .................................................50BATTERY CHARGER WITH TIMER,100-250V MODEL
8.5 ...................................................................50BATTERY CHARGER,BASIC 240V MODEL
8.6 ......................................................................51DUAL-STAGE FILTER HOLDER (OPTION)
8.7 .............................................................................51PM2.5 NOZZLE ADAPTOR (OPTION)
.........................................53APPENDIX A SPARE PARTS AND ACCESSORIES LIST
.................................................................54APPENDIX B MICROVOL-1100 LOG-BOOK
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Front Matter MicroVol-1100 User manual 1.6
List of Figures
Figure 1 MicroVol-1100 Inlet Assembly..................................................................................... 7
Figure 2 MicroVol-1100 components layout.............................................................................. 8
Figure 3 External Trigger Output............................................................................................. 11
Figure 4 Mains power adaptor................................................................................................. 12
Figure 5 Battery pack connection sequence........................................................................... 13
Figure 6 MicroVol-1100 control panel (cover removed).......................................................... 17
Figure 7 Main screen pump on................................................................................................ 21
Figure 8 Main screen pump off................................................................................................ 21
Figure 9 Main menu................................................................................................................. 21
Figure 10 Status Screen.......................................................................................................... 23
Figure 11 Setup Menu............................................................................................................. 24
Figure 12 Filter Blocked........................................................................................................... 25
Figure 13 Main screen pump off ......................................................................................... 25
Figure 14 Start Date Menu...................................................................................................... 25
Figure 15 End Date Menu ....................................................................................................... 25
Figure 16 Daily Menu .............................................................................................................. 26
Figure 17 Weekly Menu........................................................................................................... 26
Figure 18 Wind Menu.............................................................................................................. 27
Figure 19 Trigger Setup Menu................................................................................................. 27
Figure 20 Logger setup Menu................................................................................................. 29
Figure 21 Clock Menu ............................................................................................................. 29
Figure 22 Manual Mode........................................................................................................... 30
Figure 23 Hidden Menu........................................................................................................... 45
Figure 24 Conditional sampling, wind direction sensor setup................................................. 30
Figure 25 Properties screen................................................................................................... 37
Figure 26 Output screen......................................................................................................... 38
Figure 27 MicroVol-1100 Underside........................................................................................ 39
Figure 28 Replacing the pump ............................................................................................... 44
Figure 29 Dual stage filter holder ............................................................................................ 51
Figure 30 Views of the PM nozzle adaptor (pencil shows scale)......................................... 51
2.5
Figure 31 PM Nozzle components and assembly................................................................ 52
2.5
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MicroVol-1100 User manual 1.6 Introduction
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1.1 Description
The MicroVol-1100 Particulate Sampler provides a flexible platform for sampling of
PM10, PM2.5 or TSP particulate and for monitoring basic meteorological parameters.
Incorporating a pump, filter holder and flow control circuit, the sampler is
microprocessor based and features internal data logging of flow and meteorological
parameters.
The MicroVol-1100 constantly monitors the 'mass flow rate' of air passing through
the filter and pump. This mass flow is computed with the ambient pressure and
temperature sensor measurements to calculate the volumetric flow rate (e.g. 3L/min).
variation in pump vacuum is The pump is a linear diaphragm pump and the correct
flow rate is maintained by varying the amplitude of diaphragm movement, this
changes the vacuum created by the pump, more vacuum for more filter loading.
The MicroVol-1100 incorporates Active Volumetric flow control which mediates
pump speed and air velocity to guarantee a constant sampling flow-rate no matter the
filter loading of restrictions in place.
The MicroVol-1100 is designed to operate from a 12 VDC power supply. It can be
powered from a variety of different sources, including the AC mains power adaptor,
an optional battery pack, or solar panel and battery combination.
The MicroVol-1100 incorporates ambient temperature, pressure and humidity sensors,
which are used to automatically maintain a constant volumetric flow-rate of typically
3 litres per minute (l/min) through a 47mm-diameter circular filter.
The MicroVol-1100 includes the facility to monitor wind speed and direction, using
an optional external wind sensor. Wind speed and direction data are averaged and
stored in internal memory, and may be used as triggers for conditional sampling.
The MicroVol-1100 also incorporates a time clock and programmable timer enabling
multiple time based sampling programs to be configured.
The MicroVol-1100 internal data logger stores time based data averages at user
selectable intervals. The data includes date and time stamp, flow-rate, total sample
volume, average temperature, barometric pressure, and either wind speed and wind
direction or rain-fall information. Data values stored in the MicroVol may be
downloaded via the RS-232C Serial port.
The MicroVol-1100 is extremely quiet allowing it to be used at indoor sampling
locations to assess human exposure to particulate matter (PM), and is housed in a
weatherproof enclosure for outdoor sampling in a range of environments.
Some typical sampling applications include:
•Sample collection at surface mines
•Fence line sampling
•Saturation sampling to determine gradients in PM concentration
•Indoor air quality studies for health and safety
•Locations where mains power is unavailable
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Introduction MicroVol-1100 User manual 1.6
Sampler features
•Active volumetric flow control
•Internal data logging
•Sampler setup via four-line LCD display and keypad
•Sampling procedure can be programmed through specific time
periods from the hour, the day and the day of week, as well as the
calendar dates it will run between
•Conditional sampling based on wind speed and direction
•Ultra-efficient, long life pump designed for flow rates of 1 to 4.5
l/min 1
•Low power consumption
•Optional solar panel and battery operation.
•Auto pump shut-down when voltage is low to protect battery
•Light-weight rugged weather-proof construction and low noise
operation suits indoor and outdoor operation
•Precision flow controller ensures flow-rate control within 1% of set-
point
•PM10 & TSP Sampling inlet (standard), PM2.5 inlet adaptor (optional
extra), includes rain cap and insect mesh for outdoor use
•Optional dual-stage filter pack can collect particulate matter and
gaseous compounds on separate filters:
Example: First stage collects fine particulate,
inorganic anion concentrates or acidic particulate;
Second stage collects non-reactive gases.
1The PM10 Inlet must operate at flow rate of 3.0 l/min to achieve the specified cut-point
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MicroVol-1100 User manual 1.6 Introduction
1.2 Specifications
1.2.1 Flow Control
1
Volumetric flow-rate range : 1 – 4.5 l/min
Flow accuracy: 2% of reading
Flow repeatability: 0.5% of reading
1.2.2 Inlet Assembly
Inlet Assembly material: Anodised aluminium
Size Selective Inlets: PM10 (standard), TSP (pending)
PM2.5 adaptor (option)
Cut-point: 50% cut-point at 3 l/min volumetric
flow-rate
Filter holder material: Polycarbonate
Filter element: ∅47mm Polypropylene-ringed
circular filter (various materials
and pore sizes available)
1.2.3 Operating environment
Ambient temperature range: 0 to +45°C
Temperature accuracy: ±1°C
Barometric pressure range: 600-900 mm Hg (Torr)
(800-1200 hPa)
Barometric Pressure accuracy: ±4 mm Hg (Torr)
Note: Avoid corrosive, salty, or excessively
humid environments where possible.
1.2.4 Construction and Dimensions
Housing: PVC plastic, with rubber feet and
weatherproof cap
Case dimensions: 300 mm (height) x 170 mm (diameter)
Sample tube length: 500mm (1000mm option or other
lengths available)
Inlet height (approx.): 600mm (standard)
Weight: 3.75 kg with mains power adaptor
8.15kg with battery pack option
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Introduction MicroVol-1100 User manual 1.6
1.2.5 Power
Operating Voltage: 11-15 VDC (12VDC nominal)
Power consumption (typ.): 2.5 – 3 watts (210 mA @ 12 VDC)
Using clean Teflon filter with support
ring, 2um pore size, 3l/min
Power consumption (max.): 6 watts (500 mA @ 12 VDC)
Power consumption (standby): 0.6W (50 mA @ 12 VDC)
Power connector: 2.5mm DC connector
Centre (+), outside (-)
Power sources: Mains power adaptor (standard)
Battery pack (optional)
Solar panel battery charger (optional)
Low voltage cut out: At 11VDC, auto reset @ 12VDC
(adjustable)
1.2.6 Accessories
Standard: PM10 Size Selective inlet
Single filter holder
100-240VAC to 12 VDC power pack
Optional: Double filter holders
Battery pack for 24 hour sampling
Solar Panel & regulator
PM2.5 Inlet Adaptors
1.2.7 Battery Pack option
Nominal Voltage: 12VDC
Nominal capacity: 12Ah at 20hr discharge rate of 600mA
Operation capacity: At least 24 hours, up to 48 hours
depending on filter loading, filter
material and flow-rate (using a fully
charged battery)
Fuse: 3.15A, M205 type (20x5mm)
Charge retention (shelf life) at 20°C:
1 month 97%
3 months 91%
6 months 85%
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MicroVol-1100 User manual 1.6 Introduction
Life expectancy vs depth of discharge (d.o.d.):
100% d.o.d. 250 cycles (approx.)
50% d.o.d. 550 cycles (approx.)
30% d.o.d. 1500 cycles (approx.)
Battery charger type: 12V sealed lead-acid battery charger
Charging voltage: 14.4 – 15.0 VDC
Max. charge current: 2.5A
Charger connection: Waterproof connector with cover,
dotted pin (+)
Features: Clips to underside of MicroVol
Weather-proof construction
Dimensions: 185mm (height) x 170mm (diameter)
1.3 Nomenclature
SSI: Size Selective Inlet, used to sample particulates of a given Equivalent
Aerodynamic Diameter (PM10, PM2.5).
TSP: The TSP (Total Suspended Particulate) includes all suspended particulate
matter.
PM10:The PM10 includes all particulates of an Equivalent Aerodynamic Diameter
(EAD) of 10 microns or less.
PM2.5:The PM2.5 includes all particulates of an Equivalent Aerodynamic Diameter
(EAD) of 2.5 microns or less.
PPM: Parts Per Million
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Introduction MicroVol-1100 User manual 1.6
1.4 Background/ Theory
1.4.1 Particulate Sampling
The MicroVol is designed primarily as a particulate sampler. The MicroVol pump and
flow controller draws a sample of air through a specially prepared filter. The filter
collects the airborne particles for analysis. The MicroVol controls the flow-rate and
records the volume of air that has been sampled.
The airborne suspended particles are collected on a pre-weighed filter over a pre-
determined period. After the sampling period is complete, the filter is removed and re-
weighed to determine the concentration and/or composition of suspended particulate.
Concentration results are typically expressed in micrograms per cubic metre (µg/m3)
of air sampled at standard temperature and pressure conditions.
Acceptable levels have been established to govern the amount of airborne particulate
of a particular size and composition that may pose a health hazard to humans.
The MicroVol-1100 utilises a size-selective inlet to restrict the sampled particulate to
being that of a designated size or smaller.
•A PM10 sample inlet restricts the collected particulate to that with an
aerodynamic equivalent diameter (AED) of 10 microns or less.
•A PM2.5 sample inlet similarly restricts the collected particulate to
that with an aerodynamic equivalent diameter (AED) of 2.5 microns
or less.
•A TSP (Total Suspended Particulate) sample inlet, ideally, samples
all suspended particulate matter. However, it should prevent
unusually large particles and insects from being collected on the
filter element.
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MicroVol-1100 User manual 1.6 Introduction
1.4.2 Principle of operation of size selective inlets
Figure 1 MicroVol-1100 Inlet Assembly
The MicroVol-1100 inlet has been developed, tested and calibrated by the Australian
CSIRO Division of Atmospheric Research.
The size-selective inlet is of the impaction type. Ambient air enters the Inlet
Assembly via a rain cap and Stainless Steel insect mesh screen that prevent
contamination of the sample by precipitation and large debris. The air is funnelled
through an acceleration nozzle where it is directed towards a flat impaction plate that
sharply diverts the airstream. Particles larger than the size cut-point tend to be heavier
and hit the impaction plate where they are trapped. Smaller particles remain airborne
and continue into the sampler. The size cut-point is affected by airstream velocity /
flow-rate, acceleration nozzle diameter, and particle density, composition and shape.
Ambient air is drawn into the size-selective inlet at a constant flow-rate in order to
maintain the size cut-point. To achieve this, the MicroVol-1100 uses a volumetric
flow-rate controller. The flow rate must be set to 3.0 l/min to achieve the correct
particle size cut-point. This flow rate is the same for PM10 and PM2.5 measurements.
The standard inlet consists of a PM10 nozzle body, impactor plate, rain cap and
connecting tube with o-ring seals. The PM10 nozzle body incorporates a filter holder
shroud and insect screen. An optional nozzle insert is available for PM
2.5
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Introduction MicroVol-1100 User manual 1.6
measurements. The impactor plate can be removed to closely approximate TSP
sampling.
1.5 Instrument description
Figure 2 MicroVol-1100 components layout
Note: All parts, especially the impactor
assembly, filter holder and inlet tube, must be
clean and completely dry before assembly.
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MicroVol-1100 User manual 1.6 Introduction
Note: The impactor must be greased prior
to use – see Section 6.3.2 for details.
1.5.1 Inlet tube
The inlet tube is removed during transportation. Remove the seal caps from the inlet
tube. Put the seal caps in a safe place for future transport. Check that the insides of the
inlet components (aluminium inlet tube, filter holder and impactor assembly) are free
of packing foam. Make sure the tube is clean and dry internally before fitting it to the
sampler.
Insert one end of the tube into the orange push-in fitting near the base of the
MicroVol-1100. Once initial resistance is felt, push the inlet tube into the fitting a
further 5-10mm to make a gas-tight seal. Then clip the tube to the side of the
MicroVol-1100. Put one of the seal caps on the top of the tube until the filter holder /
impactor assembly is ready to be attached. Keep the caps for future transportation.
1.5.2 Filter holder/impactor assembly
Detach the blue filter holder from the metal impactor assembly. Disassemble the filter
holder; install a filter in the filter holder, then re-assemble the filter holder and
impactor assembly. The filter holder and impactor assembly fit together as shown in
Figure 1. Make sure that the parts are pushed together and sealed correctly.
Remove the cap from the upper inlet tube and install the filter holder/impactor
assembly on top of the tube. Once initial resistance is felt, push the assembly down
another 5-10mm to make a gas-tight seal on the sample tube.
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Installation MicroVol-1100 User manual 1.6
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Important:
•A clean 47mm filter should always be installed in the filter holder before
applying power.
•Always operate the MicroVol-1100 with the rain cap installed on top of the
Inlet Assembly – refer to Figure 1.
•Do not expose the MicroVol-1100 to excessive amounts of water splashing
or spray. Avoid excessively humid environments if possible.
•Keep the MicroVol-1100 away from corrosive environments including salt
water.
2.1 Connecting Equipment to the Wind Speed and Direction
Input Plug
The Wind Speed and Direction Input Plug is a 6-pin connector located on the
underside of the MicroVol.
One of the following external devices may be connected to the Input Plug Note: It is
not possible to connect more than one of the following at any one time. The MicroVol
is easily configured to accept these inputs.
•Wind speed/direction sensor
•Remote external Trigger
•Rain gauge
2.1.1 Connecting a Wind sensor or Rain-gauge
The wind speed and direction sensor and tipping bucket rain gauge are
optional accessories. The cables may be ordered separately, and can be
manufactured to any length specified. Either cable connects to the socket on
the underside of the MicroVol. A weatherproof cover is fitted to the socket to
exclude dirt and moisture. This cover should be removed only when a cable is
connected to the socket.
Mounting hardware is included. The wind sensor includes a 1.2m cross arm
and rotating adaptor for aligning the sensor to true North. The rain gauge
includes a bracket, which may be mounted to a 25-50mm pole (either vertical
or horizontal).
The MicroVol is factory configured for the wind sensor input (default
configuration). If a rain gauge is used, the configuration should be changed.
Refer to the Hidden Menu section for details of how to set up the MicroVol
for rain gauge or wind sensor input.
10