horiba APDA-371 User manual

APDA-371 Particulate Monitor Operation Manual - © Copyright 2008 HORIBA Europe GmbH. All Rights Reserved
worldwide. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or
translated into any other language in any form without the express written permission of HORIBA Europe GmbH.
APDA-371
P ARTICULATE M ONITOR
O PERATION M ANUAL

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen,  : [phone],  : [phone]
Page 2
Table of Contents
1 INTRODUCTION 4
1.1 About This Manual.............................................................................................................4
1.2 Technical Service..............................................................................................................4
1.3 Beta Attenuation Monitor...................................................................................................4
1.4 Beta Radiation Safety Statement ......................................................................................4
1.5 Model APDA-371 PM
10
USEPA Equivalent Method..........................................................4
1.6 Model APDA-371 PM
2.5
USEPA Equivalent Method .........................................................6
1.7 APDA-371 Specifications ..................................................................................................7
2 SITE SELECTION AND INSTALLATION 7
2.1 Unpacking and Inspection.................................................................................................7
2.2 Enclosure Selection...........................................................................................................8
2.3 Site Selection ....................................................................................................................8
2.4 Mounting Options in a Walk-In Shelter..............................................................................9
2.5 Installation Instructions in a Walk-In Shelter....................................................................10
2.6 Electrical Connections.....................................................................................................15
3 INITIAL SETUP OF YOUR APDA-371 18
3.1 Power On ........................................................................................................................18
3.2 Warm-up..........................................................................................................................18
3.3 Using the Keypad and Display ........................................................................................18
3.4 Filter Tape Loading..........................................................................................................19
3.5 Self-Test..........................................................................................................................20
3.6 Initial SETUP Settings Considerations ............................................................................21
3.7 Initial Leak Check and Flow Check..................................................................................22
3.8 Starting a Measurement Cycle ........................................................................................22
3.9 The Flow Statistics Screen..............................................................................................22
3.10 The OPERATE Screen....................................................................................................22
3.11 The NORMAL Screen......................................................................................................23
3.12 The INSTANTANEOUS Screen ......................................................................................23
3.13 The AVERAGE Screen....................................................................................................24
4 THE MEASUREMENT CYCLE 25
4.1 The One-Hour Cycle Timeline.........................................................................................25
4.2 Automatic Span Check During The Cycle .......................................................................26
4.3 Sample Period Description..............................................................................................26
5 FLOW SYSTEM and FLOW CALIBRATIONS 27
5.1 Flow System Diagram .....................................................................................................27
5.2 Flow Type Descriptions...................................................................................................27
5.3 Leak Check Procedure....................................................................................................28
5.4 Leak Isolation and Nozzle Seal Methods.........................................................................29
5.5 Nozzle and Vane Cleaning..............................................................................................29
5.6 Field Calibration of Flow System – Actual (Volumetric) Flow Mode ................................31
5.7 Field Calibration of Flow System – EPA Standard Flow Mode........................................32
5.8 Field Calibration of Flow System – Metered Flow Mode.................................................33
6 SETUP MENU DESCRIPTIONS 34
6.1 CLOCK Screen................................................................................................................35
6.2 SAMPLE Settings Screen – Critical Information.............................................................35
6.3 CALIBRATE Screen – Critical Information ......................................................................37
6.4 EXTRA1 Screen..............................................................................................................38

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen, Telefon: [phone], Fax: [phone] Page 3
6.5 ERRORS Screen.............................................................................................................39
6.6 PASSWORD Screen.......................................................................................................41
6.7 INTERFACE Screen........................................................................................................41
6.8 SENSOR Screen.............................................................................................................41
6.9 HEATER Screen..............................................................................................................42
7 MAINTENANCE, DIAGNOSTICS and TROUBLESHOOTING 44
7.1 HORIBA Suggested Periodic Maintenance.....................................................................44
7.2 Audit Sheet and Test Records.........................................................................................44
7.3 Self-Test Feature.............................................................................................................45
7.4 Power-Up Problems ........................................................................................................45
7.5 Basic Problem and Cause/Solution Table.......................................................................45
7.6 Nozzle Component Replacement....................................................................................48
7.7 Field BKGD Zero Background Tests ...............................................................................48
7.8 Test Menu System...........................................................................................................50
7.9 COUNT test Screen.........................................................................................................50
7.10 PUMP Test Menu............................................................................................................50
7.11 TAPE Test Menu.............................................................................................................51
7.12 DAC Test Menu – Analog Output Test............................................................................51
7.13 CALIBRATE Test Menu...................................................................................................51
7.14 INTERFACE Test Menu..................................................................................................52
7.15 FLOW Test Menu............................................................................................................52
7.16 ALIGN Test Menu – Photo Sensor Tests ........................................................................52
7.17 HEATER Test Menu........................................................................................................53
7.18 FILTER-T Test Menu – Filter Temperature Sensor.........................................................53
7.19 RH Test Menu – Filter Humidity Sensor..........................................................................54
8 EXTERNAL DATALOGGER INTERFACE SYSTEM 55
8.1 Analog Concentration Output Signal...............................................................................55
8.2 Early Cycle Mode Description .........................................................................................56
8.3 Telemetry and Error Relays.............................................................................................57
8.4 Digital Datalogger Interfacing with the APDA-371...........................................................59
9 RS-232 SERIAL COMMUNICATIONS – DATA RETRIEVAL 61
9.1 Serial Port Connections and Settings..............................................................................61
9.2 HORIBA Communications Software................................................................................61
9.3 Downloading Data Using HyperTerminal.........................................................................61
9.4 System Menu File Descriptions.......................................................................................62
9.5 Printer Output Port...........................................................................................................68
9.6 Modem Option.................................................................................................................68
9.7 Flash Firmware Upgrades...............................................................................................69
10 ACCESSORIES and PARTS 70
10.1 Consumables, Replacement Parts, and Accessories......................................................70
10.2 Series 500 Sensor Configurations.....................................................................................2
11 THEORY OF OPERATION and MATHEMATICAL ANALYSIS 4
11.1 Converting Data Between EPA Standard and Actual Conditions......................................5
APDA-371 Audit Sheet Sample 91

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen,  : [phone],  : [phone]
Page 4
1 INTRODUCTION
1.1 About This Manual
This document is organized with the most important information toward the front of the manual, such as site selection,
installation, setups, and field calibrations.
Sections and sub-sections marked with an Information Symbol contain critical information which all APDA-371
owners and operators should read and understand. Toward the back are sections that provide in-depth information on
subjects such as theory, diagnostics, accessories, and alternate settings. These sections provide valuable information
which should be consulted as needed. Electronic versions of this manual are also available.
1.2 Technical Service
This manual is structured by customer feedback to provide the required information for setup, operation, testing,
maintaining, and troubleshooting your APDA-371 unit. Should you still require support after consulting your printed
documentation, we encourage you to contact one of our expert Technical Service representatives during normal
business hours of 7:00 a.m. to 4:00 p.m. Pacific Standard Time, Monday through Friday. In addition, technical
information and service bulletins are often posted on our website. Please contact us and obtain a Return Authorization
(RA) number before sending any equipment back to the factory. This allows us to track and schedule service work and
expedite customer service.
1.3 Beta Attenuation Monitor
The HORIBA model APDA-371 automatically measures and records airborne particulate concentration levels using the
principle of beta ray attenuation. This method provides a simple determination of concentration in units of milligrams or
micrograms of particulate per cubic meter of air. A small
14
C (Carbon 14) element emits a constant source of high-
energy electrons known as beta particles. These beta particles are detected and counted by a sensitive scintillation
detector. An external pump pulls a measured amount of dust-laden air through a filter tape. After the filter tape is loaded
with ambient dust, it is automatically placed between the source and the detector thereby causing an attenuation of the
beta particle signal. The degree of attenuation of the beta particle signal is used to determine the mass concentration of
particulate matter on the filter tape, and hence the volumetric concentration of particulate matter in ambient air. A
complete description of the measurement cycle is included in Section 4. In addition, an in-depth scientific explanation of
the theory of operation and the related equations is included toward the back of the manual.
1.4 Beta Radiation Safety Statement
The HORIBA APDA-371 contains a small
14
C (Carbon 14) beta radiation-emitting source. The activity of the source is
60 Ci ±15Ci (microcurries), which is below the “Exempt Concentration Limit” as defined in 10 CFR Section 30.70 –
Schedule A. The owner of a APDA-371 is not required to obtain any license in the United States to own or operate the
unit. The owner of a APDA-371 may elect to return the entire unit to HORIBA for recycling of the
14
C source when the
unit has reached the end of its service life, although the owner is under no obligation to do so. Under no circumstances
should anyone but factory technicians attempt to remove or access the beta source. The beta source has a half-life of
about 5730 years, and should never need to be replaced. Neither the
14
C source nor the beta particle detector are
serviceable in the field. Should these components require repair or replacement, the APDA-371 must be returned to the
factory for service and recalibration.
1.5 Model APDA-371 PM
10
USEPA Equivalent Method
The HORIBA Europe GmbH Model APDA-371 is designated as an equivalent method for PM10 monitoring by the
United States Environmental Protection Agency on August 3, 1998.
Designation Number: EQPM-0798-122

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen, Telefon: [phone], Fax: [phone] Page 5
The EPA designation applies to G, -1, G-1, and later APDA-371 PM10 Beta Attenuation Monitors, when used in
conjunction with the following requirements. Users are advised that configurations that deviate from this specific
description may not meet the applicable requirements of 40 CFR Parts 50 and 53.
•The APDA-371 is operated to obtain a daily average of the hourly measurements, with a filter change frequency
of one hour.
•The inlet must be equipped with the standard BX-802 EPA PM
10
inlet head.
•The unit must be used with standard glass fiber filter tape.
•The unit may be operated with or without any of the following options: BX-823 inlet tube extension, BX-825
heater kit, BX-826 230V heater kit, BX-828 roof tripod, BX-902 exterior enclosure, BX-903 exterior enclosure
with temperature control, BX-961 mass flow controller, BX-967 internal calibration device.
•The SAMPLE TIME parameter must be set for 50 minutes.

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen,  : [phone],  : [phone]
Page 6
1.6 Model APDA-371 PM
2.5
USEPA Equivalent Method
The HORIBA Europe GmbH Model APDA-371 Beta Attenuation Mass Monitor - PM
2.5
FEM Configuration, is designated
as an equivalent method for PM
2.5
monitoring in accordance with 40 CFR Part 53 by the United States Environmental
Protection Agency as of March 12, 2008.
Designation Number: EQPM-0308-170
All of the following parameters and conditions must be observed when the APDA-371 is operated as a PM
2.5
FEM
particulate monitor:
•The inlet must be equipped with an EPA-designated PM
2.5
Very Sharp Cut Cyclone (VSCC™-A by BGI, Inc.).
The HORIBA stock number for the VSCC™ is BX-808.
•The inlet must be equipped with a standard EPA PM
10
inlet head. HORIBA BX-802.
•The unit is operated for hourly average measurements. The PM
2.5
concentration is calculated (external to the
APDA) as a daily average of the hourly concentration measurements made by the APDA-371.
•The unit must be equipped with firmware revision 3.2.4 or later.
•The APDA-371 must be operated in proper accordance with this operation manual, revision F or later. A
supplemental BGI Inc. manual is also supplied with the VSCC™.
•The unit must be equipped with a BX-596 ambient temperature and barometric pressure combination sensor.
This is used for flow control and flow statistics.
•The unit must be equipped with the internal BX-961 automatic flow controller, and must be operated in Actual
(volumetric) flow control mode.
•The unit must be equipped with a BX-827 (110V) or BX-830 (230V) Smart Inlet Heater, with the heater RH
regulation set point set to 35%, and Delta-T control disabled.
•The unit must be equipped with the 8470-1 rev D or later tape control transport assembly with close geometry
beta source configuration. All APDA-371 units manufactured after March 2007 have these features standard.
Older units will have to be factory upgraded and re-calibrated to the latest specifications.
•The unit must be operated with standard glass fiber filter tape.
•The COUNT TIME parameter must be set for 8 minutes.
•The SAMPLE TIME parameter must be set for 42 minutes.
•The BX-302 zero filter calibration kit is a required accessory. This kit must be used to audit the BKGD
(background) value upon unit deployment and periodically thereafter, as described in the BX-302 manual.
•The unit may be operated with or without a BX-823 eight foot inlet tube extension and with or without
weatherproof outdoor enclosures BX-902 or BX-903.

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen, Telefon: [phone], Fax: [phone] Page 7
1.7 APDA-371 Specifications
PARAMETER SPECIFICATION
Measurement Principle: Particulate Concentration by Beta Attenuation.
US-EPA Existing
Designations: PM
10
: EPA EQPM-0798-122
PM
2.5
: Class III EPA EQPM-0308-170
Standard Range: 0 - 1.000 mg/m
3
(0 - 1000 g/m
3
)
Optional Ranges: 0 - 0.100, 0.200, 0.250, 0.500, 2.000, 5.000, 10.000 mg/m
3
(special applications)
Accuracy: Exceeds US-EPA Class III PM
2.5
FEM standards for additive and multiplicative bias.
Resolution: ± 0.1 µg/m
3
Lower Detection Limit:
(2σ) (1 hour) Less than 4.8 g/m
3
from 0.000 to 0.100 mg/m
3
(less than 4.0 g/m
3
typical)
Lower Detection Limit:
(2σ) (24 hour) Less than 1.0 g/m
3
Measurement Cycle Time: 1 Hour
Flow Rate: 16.7 liters/minute. Adjustable 0-20 LPM range. Actual or Standard flow.
Filter Tape: Continuous glass fiber filter, 30mm x 21m roll. > 60 days/roll.
Span Check: Automatic 800ug (typical) span foil verified hourly.
Beta Source:
14
C (carbon-14), 60 µCi ±15 µCi (< 2.22 X 106Beq), Half-Life 5730 years.
Beta Detector Type: Photomultiplier tube with organic plastic scintillator.
Operating Temp. Range: 0 to +50°C
Ambient Temp. Range: -30° to +60°C
Ambient Humidity Range: 0 to 90% RH, non-condensing.
Humidity Control: Actively controlled inlet heater module, 10 - 99% RH set point.
Approvals: US-EPA, CE, NRC, TUV, CARB, ISO-9001
User Interface: Menu-driven interface with 8x40 character LCD display and dynamic keypad.
Analog Output: Isolated 0-1 VDC output standard. 0-10V, 4-20mA, 0-16mA switch-selectable.
Serial Interface: RS-232 2-way serial port for PC or modem communications.
Printer Output: Output-only serial port, data or diagnostic output to a PC or serial printer.
Telemetry Inputs: Clock Reset (voltage or contact closure), Telemeter Fault (contact closure).
Alarm Contact Closures: Data Error, Tape Fault, Flow Error, Power Failure, Maintenance.
Compatible Software: MicroMet Plus
®
, Comet™, HyperTerminal
®
, ProComm Plus
®
.
Error Reporting: User-configurable. Available through serial port, display, and relay outputs.
Memory: 4369 records (182 days @ 1 record/hr).
Power Supply: 100 - 230 VAC, 50/60 Hz. 0.4 kW 3.4A max.
Weight: 24.5 kg (54 lbs) without external accessories.
Unit Dimensions: H x W x D = 31cm x 43cm x 40cm (12.25” x 17” x 16”).
*Specifications may be subject to change without notice.
2 SITE SELECTION AND INSTALLATION
2.1 Unpacking and Inspection
If any damage to the shipment is noticed before unpacking, a claim must be filed with the commercial carrier
immediately. Notify HORIBA after notification of the commercial carrier.
Remove the unit and accessories from the shipping boxes and compare the received items to the packing list. Make
sure you have all of the required items for the type of installation you plan to perform.

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen,  : [phone],  : [phone]
Page 8
The APDA-371 is shipped with two white foam rings and a white plastic shim inside the front of the unit, which prevent
the moving parts of the tape control assembly from being damaged in transit. Do not remove the foam rings until the
APDA-371 is ready to be installed. These rings must be replaced anytime the unit is being transported in order to avoid
damaging the tape control mechanism.
Please keep the special box and foam packing material that the APDA-371 was shipped in, to re-use in the event that
you must return the unit to the factory. HORIBA is not responsible for any damages to the unit if returned in non-original
packaging, or without the foam rings in place. Contact HORIBA for replacement packing materials if necessary.
2.2 Enclosure Selection
The APDA-371 unit is not weatherproof or water resistant, and is designed to be mounted in a weatherproof, level,
vibration free, dust free, and temperature controlled environment where the operating temperature is between 0o C and
+50o C, and where the relative humidity is non-condensing and does not exceed 90%. There are two standard
configurations described below for providing a weatherproof location in which to install the unit. Please contact HORIBA
if you plan to have a non-standard mounting or enclosure configuration.
1. A walk-in building or mobile shelter with a flat roof: This is often a pre-fabricated shelter, a trailer shelter, or
a room in an existing permanent building. The APDA is mounted on a bench-top or in an equipment rack, often with a
variety of other instruments installed in the same shelter. The inlet tube of the APDA must extend up through the roof
with appropriate hardware. AC power must be available. Instructions for this type of installation are included in this
section of the manual.
2. BX-902/903 environmentally controlled mini enclosure: Sometimes nicknamed “dog house” enclosures,
these small pre-fabricated enclosure are just big enough for the APDA and related accessories, and are installed on the
ground or on the roof of a larger building. They are available with a heater (BX-902), or with a heater and air conditioner
(BX-903). These enclosures are custom designed by HORIBA to accept the APDA-371, and are supplied with a
supplemental setup and installation manual.
NOTE: The air temperature inside any enclosure in which a APDA-371 is installed must be held as constant as possible
over the course of the hour. This is important because the unit measures the beta particles through a small gap of air
around the filter tape at the beginning and the end of each hour. If the air temperature inside the enclosure has changed
by more than about 2 degrees C during this time, the concentration measurement can be affected on the order of
several micrograms. HORIBA recommends logging the air temperature inside the enclosure to monitor this effect. The
exact temperature is not critical as long as it fluctuates as little as possible during any one hour.
2.3 Site Selection
Selection of a proper site for the APDA-371 is critical for accurate measurements. In many cases, these items must be
correctly addressed in order for the collected data to be acceptable for regulatory requirements, such as EPA PM
10
and
PM
2.5
equivalent methods. Specifications for the site selection can be found in EPA document EPA-450/4-87-007 May
1987 “Ambient Monitoring Guidelines for Prevention of Significant Deterioration”, as well as 40 CFR, Part 58. In any
case, the Code of Federal Regulations takes precedence.
Inlet Height:
•The inlet should be located in the “breathing zone”, between 2 and 15 meters above ground level. If the APDA
is to be installed in an enclosure at ground level, then the inlet height must two meters or greater above the
ground.
•If the inlet is located on (or through) a rooftop, the total height should be no more than 15 meters from the
ground level. The inlet height should be two meters above roof surface of the building that the unit is installed
in. This matches the specified inlet height of most FRM samplers.
•If the APDA-371 is to be co-located with other particulate instruments, such as FRM filter-based samplers or
other APDA units, then the air inlet must be the same height as the inlet of the other samplers.
•The BX-902 and BX-903 environmental shelters are designed to locate the inlet two meters above whatever
surface they are placed on.
•Make sure to account for the height of the PM
10
and/or PM
2.5
heads when planning the inlet tube length.
HORIBA can supply a variety of tube lengths up to 8-feet long.
•The maximum allowable total inlet tube length is 16 feet between the APDA-371 and the bottom of the inlet

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen, Telefon: [phone], Fax: [phone] Page 9
head.
•If the APDA inlet is the highest point on a building, then lightning rods must be installed to prevent destruction of
the APDA during electrical storms.
Inlet Radius Clearance:
•The APDA-371 inlet must have a one meter radius free of any objects that may influence airflow characteristics,
including the inlet of another instrument.
•If a APDA-371 is to be installed at a station with other APDA or FRM sampler, the inlets of each sampler must
be no less than one meter apart from each other.
•If the APDA is to be collocated with another APDA instrument or FRM sampler, then the inlets must be spaced
between one and two meters apart. Two meters is recommended where possible.
•If installing near a PM
10
SSI Hi-Volume sampler, then the distance between the inlet of the APDA-371 and the
Hi-Vol should be no less than three meters.
•The APDA-371 inlet must be located at least two meters from obstructions such as short walls, fences, and
penthouses.
•If located beside a major obstruction (such as a building) then the distance between the unit and the building
must be equal to twice the height of the building.
•The inlet must be at least 20 meters from the drip line of any overhanging trees.
•There must be at least a 270 degree arc of unrestricted airflow around the inlet. The predominant direction of
concentration movement during the highest concentration season must be included in the 270 degree arc.
Particulate Sources: To avoid possible errors in the concentration measurements, the inlet must be located as far as
possible from any artificial sources of particulate, such as blowers, vents, or air conditioners on a rooftop. Especially if
any of these types of devices blow air across the inlet of the APDA-371. Even sources of filtered air must not blow
across the inlet.
Spacing from Roadways: The APDA-371 should usually not be located directly next to a major highway or arterial
roadway, as vehicle exhaust will dominate the concentration measurement. This effect can be difficult to predict
accurately as shifting winds may direct the plume toward or away from the APDA inlet.
•Roads with a daily traffic volume of less than 3,000 vehicles are generally not considered major sources of
pollutants, and in this case the APDA must be located at least five meters from the nearest traffic lane.
•The APDA must be located at least 25 meters from any elevated roadway greater than five meters high.
•The unit should be located as far as possible from unpaved roadways, as these also cause artificial
measurements from fugitive dust.
•The unit should not be installed in unpaved areas unless year-round vegetative ground cover is present, to
avoid the affects of re-entrained fugitive dust.
2.4 Mounting Options in a Walk-In Shelter
When the APDA-371 is to be located in a walk-in shelter, the unit will have to be installed either in an equipment rack or
on a bench-top. HORIBA recommends using an equipment rack when possible, as it does a better job of keeping the
unit level and in the correct placement. A rack also tends to be a cleaner installation and is more space-efficient.
However, either method may be used as long as the mounting is level and allows the inlet tube to be perfectly vertical.
HORIBA supplies brackets standard rack-mount screws with each unit. Take the following into account when planning
your mounting:
•Rear Access: It is important that your mounting leaves plenty of access to the rear of the APDA-371 unit for
wiring connections and maintenance. At least five inches is required. Full access to the back is recommended
whenever possible.
•Top Access: It is necessary to have a minimum of eight inches clearance between the top of the APDA inlet
receiver and the bottom of the shelter ceiling to accommodate the smart inlet heater which mounts on the inlet
tube directly above the APDA.
•Mobile Shelters: If the APDA-371 is being installed into an equipment rack in a mobile shelter or van, the
instrument must be supported from the bottom in addition to the rack brackets, due to additional strain. The
foam shipping rings must also be inserted any time a mobile shelter is moved with the APDA-371 inside.
•Rack Modifications: It is often necessary to modify the top of the equipment rack by cutting a hole to allow the
inlet tube to extend through to the ceiling. The drawing below shows the location of the hole. Note: The inlet

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen,  : [phone],  : [phone]
Page 10
heater is a cylinder which installs on the inlet tube two inches above the top of the inlet receiver of the APDA-
371. If the APDA unit is to be mounted high in the rack, it may be necessary to make the hole in the top of the
rack larger in order to clear the heater diameter. The heater is supplied with an insulation tube cover which may
be modified as needed. Make sure these parts are going to fit before installing the APDA-371.
Rack top modifications for inlet tube clearance
2.5 Installation Instructions in a Walk-In Shelter
Installation of the APDA-371 should be performed by personnel familiar with environmental monitoring equipment.
There are no special precautions or handling concerns except for the normal level of care required for handling
scientific equipment. Refer to the diagrams on the following pages.
1. Roof Modifications: Determine the exact location where the APDA inlet tube will pass through the roof of the
enclosure, and drill a 2 ¼” or 2 ½” diameter hole through the roof at that location. Make sure the hole is directly above
where the APDA inlet receiver is to be located, as the inlet tube must be perfectly vertical. A plumb-bob is useful for
determining where to locate the hole. Note: The inlet receiver on the APDA is slightly to the left (0.6 in, 15 mm) of the
center line of the unit. See diagrams.
2. Waterproof Flange: Apply all-weather caulking around the top of the hole, and install the BX-801 roof flange
onto the hole. It is usually best if the threaded barrel of the flange assembly is installed downward, into the hole. Secure
the flange in place with four lag bolts or self-tapping screws (not supplied). Caulk around the screws to prevent leaks.
Apply Teflon tape to the threads of the gray plastic watertight fitting, and screw it into the roof flange.
3. Inlet Tube: Remove the white cap and rubber seal from the flange assembly. This makes it easier to install the
inlet tube, as the rubber seal is a tight fit around the tube. Lower the inlet tube through the flange assembly in the roof
and into the inlet receiver on the APDA Make sure the inlet tube is fully seated.
4. Inlet Alignment: It is very important for the inlet tube to be perpendicular to the top of the APDA. The nozzle
may not close properly if there is binding caused by misalignment. A simple check is to rotate the inlet tube back and
forth by hand (before tightening the roof flange seal or the APDA inlet set screws). If the inlet tube is installed straight,
then the tube should rotate fairly easily while inserted into the APDA. If it does not rotate, check the inlet tube for vertical
alignment or move the APDA slightly.
5. Smart Heater: Before tightening the inlet tube in place, the BX-827 or BX-830 smart inlet heater (used on most
APDA-371 units) must be installed on the tube. Pull the inlet tube up out of the inlet receiver, and pass the tube through
the hole in the heater body (the cable end is the bottom). Then re-insert the inlet tube into the APDA. Position the
bottom of the heater unit two inches above the top of the inlet receiver on the APDA, and securely tighten the two set
screws in the heater to fasten it to the tube. Included with the smart heater is a 12” tube of insulation. The tube is split
down its length for easy application. Wrap the insulation around the heater body and peel back the adhesive cover strip
to secure in place. The insulation may be cut to fit if needed.
6. Inlet Tightening: Slide the black rubber seal and white cap down over the top of the inlet tube and into the roof
flange. It is easier if you wet the rubber seal with water or alcohol first. Tighten the white plastic cap.
7. Support Struts: The BX-801 inlet kit usually comes with two angled aluminum struts to support the inlet tube
above the roof and prevent the inlet from moving in the wind. These struts are typically fastened (about 90 degrees

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
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HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen, Telefon: [phone], Fax: [phone] Page 11
apart) to the inlet tube with a supplied hose clamp. The bottom ends of the struts should be fastened to the roof with lag
bolts (not supplied). Note: Some installations may require different methods or hardware for supporting the inlet tube.
Support the tube in the best manner available.
8. Temperature Sensor: Most APDA-371 units are supplied with a BX-592 (temperature) or BX-596 (temperature
and pressure) sensor, which is attached to the inlet tube above the roof. The sensor cable must feed into the shelter to
be attached to the APDA. In some cases it is easiest to simply drill a 3/8” hole through the roof about six inches away
from the inlet tube, then feed the cable through the hole and caulk around it to prevent leaks. In some applications there
may be a better place to feed the cable into the shelter. Route the cable into the shelter in the best manner. The BX-596
attaches directly to the inlet tube with a supplied U-bolt. If using a BX-592, fasten the aluminum cross-arm to the inlet
tube, and clip the temperature probe to the cross-arm.
9. Inlet Separator Heads: If the APDA-371 is to be configured for FEM PM
2.5
monitoring, then install the PM
2.5
Very Sharp Cut Cyclone (BGI VSCC™) onto the top of the inlet tube beneath the BX-802 PM
10
head. For PM
10
monitoring, the BX-802 is installed on the inlet tube with no cyclone. Use o-ring lubricant as needed.
10. Inlet Tube Grounding: Tighten the two ¼”-20 set screws located in the inlet receiver of the APDA to secure
the inlet tube. This also creates a ground connection for the inlet tube, as static electricity can build up on the inlet under
certain atmospheric conditions and cause errors. This is very important in areas near electromagnetic fields, high
voltage power lines, or RF antennas. Check the connection by scraping away a small spot of the clear anodizing near
the bottom of the inlet tube, and use a multimeter to measure the resistance between this spot and the “CHASSIS”
ground connection on the back of the APDA. It should measure just a couple of Ohms or less if a good connection is
made with the set screws. If not, remove the set screws and run a ¼-20 tap through the holes. Then reinstall the screws
and check the electrical resistance again. Note: Anodized aluminum surfaces are non-conductive.

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
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______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen,  : [phone],  : [phone]
Page 12
BX
-
802
PM
10
Head
BX
-
808
BGI VSCC™
PM
2.5
Cyclone
(optional)
BX
-
596
AT/BP Sensor
(or BX-592)
Inlet Support
Struts
8112
Inlet Tube
8’ standard
BX
-
801
Roof Flange
Enclosure
Roof
BX
-
827 or 830
Smart Heater
with insulation
Mounting
Bench or
Rack
2”
2 Meters
6.5 feet
adds
14.0” adds
19.0”
APDA
-
371
With Medo
vacuum pump
or equivalent
8” min. clearance
3 to 4 feet typical
5’ typical
3
/
28
/200
7
BAM 1020
1
6
:
08
:
29
LAST CONCENTRATION: 0.028 mg/m3
CURRENT FLOW: 16.7 LPM
STATUS: ON
FIRMWARE: 3236-02 3.2.4
SETUP OPERATE TEST
TAPE
F1 F2 F3
F4 F5 F6
APDA
MET ONE INSTRUMENTS
Typical APDA-371 Installation in a walk-in shelter

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen, Telefon: [phone], Fax: [phone] Page 13
BX
-
802
PM
10
Head
3
/
28
/200
7
BAM 1020
1
6
:
08
:
29
LAST CONCENTRATION: 0.028 mg/m3
CURRENT FLOW: 16.7 LPM
STATUS: ON
FIRMWARE: 3236-02 3.2.4
SETUP OPERATE TEST
TAPE
F1 F2 F3
F4 F5 F6
APDA
MET ONE INSTRUMENTS
BX
-
808
BGI VSCC™
PM
2.5
Cyclone
(optional)
BX
-
596
AT/BP Sensor
(or BX-592)
Inlet Tube
2”
-Total Height-
6.6 ft (2.0 meters)
without cyclone
7.0 ft (2.1 meters)
with cyclone
adds
14.0”
adds
19.0”
15.5”
27” typical
Inlet tube
Mounting
Rack
BX
-
902/90
3
Environmental
Enclosure
BX
-
126
Vacuum Pump
or equivalent
BX
-
827 or 830
Smart Heater
with insulation
8119 Seal
Typical APDA-371 Installation in a BX-902 mini enclosure

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen,  : [phone],  : [phone]
Page 14
12.25”
3
/
28
/200
7
BAM 1020
1
6
:
08
:
29
LAST CONCENTRATION: 0.028 mg/m3
CURRENT FLOW: 16.7 LPM
STATUS: ON
FIRMWARE: 3236-02 3.2.4
SETUP OPERATE TEST
TAPE
F1 F2 F3
F4 F5 F6
APDA
MET ONE INSTRUMENTS
14.25”
19”
17”
120 VOLTS
16”
5” min. rear clearance
75mm (2.95”)
from front face
15mm (0.6”)
from center
C
L
9.25”
3.5”
FRONT BACK
TOP
APDA-371 mounting dimensions

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
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HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen, Telefon: [phone], Fax: [phone] Page 15
2.6 Electrical Connections
Each APDA-371 is factory configured to run on either 120 or 230 volt AC power. Your shelter must be wired for power
to run the APDA, the pump, and any other AC powered devices such as computers, data loggers, other instruments,
etc. A good earth-ground connection point near the APDA unit is highly recommended. Have a qualified electrical
contractor provide power according to all local codes. After the APDA unit is installed and power is provided, connect
the electrical accessories as follows. Refer to the diagram below.
1. APDA-371 Power: Plug the APDA-371 into the AC power mains with the provided power cord. Note: There are
two fuses located inside the APDA power switch module, which can be accessed by prying open the small cover
surrounding the switch. The power cord must be removed in order to open the cover.
HORIBA recommends plugging the APDA-371 unit into a battery back-up UPS (uninterruptible power supply) since
even a momentary power outage will reset the APDA and stop an entire hour’s worth of data collection. A small
computer-style UPS of 300 Watts or greater is usually sufficient. The vacuum pump usually does not need to be
connected to the UPS as the APDA can compensate for short pump power outages. If the pump is to be backed up as
well, then a much larger UPS is required.
2. Chassis Ground: Connect one of the terminals marked “CHASSIS” on the back of the APDA to a ground point
as close as possible to the instrument. Use the green/yellow ground wire supplied with the unit. A ground rod is
recommended, but a cold water pipe, or junction box safety ground are other possible connection points. Note: the
APDA-371 also uses the standard safety ground line inside the power cord.
3. Pump Connection: Decide on a location to place the air pump. The best location is often on the floor under the
rack or bench, but it may be up to 25 feet away if desired. Route the air tubing from the pump to the back of the APDA
unit, inserting it firmly into the compression fittings on both ends. The tubing should be cut to the proper length and the
excess saved for replacements. The pump is supplied with a 2-wire signal cable which the APDA uses to turn the pump
on and off. Connect this cable to the terminals on the back of the APDA marked “PUMP CONTROL” The end of the
cable with the square black ferrite filter goes to the APDA, but the polarity of the wires is not important. Either the red or
black wire can go to either terminal. Connect the other end of the cable to the two terminals on the pump.
4. Temperature/Pressure Sensor: The BX-596 or BX-592 temperature sensor should already be installed onto
the inlet tube, and the sensor cable routed to the APDA-371. Connect the cable to the terminals on the back of the
APDA as follows:
BX
-
596
AT/BP
Sensor
Wire Color
Terminal Name
Yellow Channel 6 SIG
Black/Shield Channel 6 COM
Red Channel 6 POWER
Green Channel 6 ID
White Channel 7 SIG
BX
-
592
AT
Sensor
Wire Color
Terminal Name
Yellow or
White Channel 6 SIG
Black/Shield Channel 6 COM
Red Channel 6 POWER
Green Channel 6 ID
Additional HORIBA BX-500 series sensors may be connected to APDA channels 1 through 5 to log various other
meteorological parameters. Details on these sensor connections are given in Section 10.2 of this manual.
5. Smart Heater: There are two possible versions of the BX-827/830 Smart Heater electrical connection. If the
Smart Heater kit was supplied with a gray relay module (units built after May, 2008 as shown below), then plug the relay
module into the mating control connector on the back of the APDA, and connect the Smart Heater to the green
connector on the top of the relay module. The relay module has its own power cord to supply power to the heater. Note:
The connector on the back of the APDA has been changed to prevent connecting the heater directly to the APDA.

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen,  : [phone],  : [phone]
Page 16
On previous versions of the kit, the Smart Heater assembly simply plugs directly into the back of the APDA-371, and
power is supplied internally by the APDA. If the APDA is configured like this, then simply plug the heater cable directly
into the mating green metal connector on the back of the APDA-371.
6. Optional Data Logger Connection: The APDA-371 has an analog output which may be recorded by a
separate data logger if required. Connect the terminals on the back of the APDA marked ”VOLT OUT +, -“ to the data
logger with 2-conductor shielded cable (not supplied). Polarity must be observed. Information on configuring this analog
output is provided in Section 8 of this manual. A current loop output is also available.
7. Other Connections: The APDA-371 has a variety of telemetry I/O relays and error relays located on the back
of the unit. There are also RS-232 data connections. These items are described in Section 8 and Section 9 of this
manual.
Relay Module
Smart Heater
Heater Power Cord
Relay Module
Smart Heater
Heater Power Cord

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen, Telefon: [phone], Fax: [phone] Page 17
RANGE
X1
PRINTER
RS
-
232
OPTION
SWITCH
1 2 3 4
TELEMETRY
FAULT N.V.
SIG
COM
POWER
ID
CHAN 1
SIG
COM
POWER
ID
SIG
COM
POWER
ID
SIG
COM
POWER
ID
SIG
COM
POWER
ID
SIG
COM
POWER
ID
SIG
COM
POWER
ID
EXTERNAL
RESET N.V.
+
EXTERNAL
RESET V.
-
TAPE
FAULT
INVALID
DATA
MAINTENANCE
FLOW
FAULT
PUMP
CONTROL
POWER
FAIL
+
VOLTAGE
OUTPUT
-
CHASSIS
GROUNDS
+
CURRENT
OUTPUT
-
CHAN 2
CHAN 3
CHAN 5
CHAN 6
CHAN 7
CHAN 4
RS232
POLARITY
C1 NORMAL
C2 REVERSE
SW1 OFF= 0-1V
SW1 ON= 0-10V
SW2 OFF= 0-16mA
SW2 ON= 4-20mA
RANGE
X10
VACUUM
SMART
HEATER
APDA-371 back panel connections

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen,  : [phone],  : [phone]
Page 18
3 INITIAL SETUP OF YOUR APDA-371
This section describes the process for setting up and configuring your APDA-371, as well as the basic steps required to
put the unit into operation. Some of the topics in this section will direct you to other sections of this manual for more
detailed information. It is assumed that the unit is already installed and sited as described in Section 2. In some cases it
is useful to first set up the APDA-371 unit on a test bench before deployment or installation in order to explore the
functions of the unit and perform setups. The following steps for starting up your unit are described in this section:
1. Power on and warm up the unit.
2. Familiarize yourself with the user interface.
3. Load a roll of filter tape.
4. Perform a Self-Test.
5. Set the real-time clock, and review your SETUP parameters.
6. Perform a leak check and a flow check.
7. Return to the top-level menu and wait for automatic start at the top of the hour.
8. View the OPERATE menus during the cycle.
3.1 Power On
The APDA-371 has a power switch located on the back of the unit directly above the power cord. Verify that the unit is
plugged in to the correct AC voltage, and that any electrical accessories are correctly wired before turn the unit on.
(Section 2.6) When power is switched on the main menu screen should appear after a few seconds as shown below.
The unit will probably flash an error indicating that there is no filter tape installed. Note: Units running revision 3.1 or
earlier firmware will display a slightly different main menu screen.
The Main Menu Screen
3.2 Warm-up
The APDA-371 must warm up for at least one hour before an operation cycle is started. This is because the beta
detector contains a vacuum tube which must stabilize every time the unit is powered up. This also allows the electronics
to stabilize for optimal operation. This applies any time the unit is powered up after being off for more than a moment.
Instrument setups and filter tape installation can be performed during this warm up time. Most agencies choose to
discard the first few hours of concentration data after the APDA is powered up.
3.3 Using the Keypad and Display
When the APDA-371 is powered up it will display the main (top level) menu on the LCD display. This menu is the
starting point for all functions of the APDA-371 user interface.
3/28/2007 BAM 1020 16:08:29
LAST CONCENTRATION: 0.028 mg/m3
CURRENT FLOW: 16.7 LPM
STATUS: ON
FIRMWARE: 3236-02 3.2.4
SETUP OPERATE TEST
TAPE
F1 F2 F3
F4 F5 F6
3/28/2007 BAM 1020 16:08:29
LAST CONCENTRATION: 0.028 mg/m3
CURRENT FLOW: 16.7 LPM
STATUS: FILTER TAPE ERROR!
FIRMWARE: 3236-02 3.2.4
SETUP OPERATE TEST TAPE
APDA
-
371
APDA
-
371

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen, Telefon: [phone], Fax: [phone] Page 19
The APDA-371 User Interface
Soft Keys:
Directly beneath the display are four white buttons called “soft-keys” or “hot-keys”. These are dynamic keys who’s
function changes in response to a menu option displayed directly above each key on the bottom row of the display.
Whatever menu option is displayed above one of these keys is the function which that key will perform in that particular
menu. These are used throughout the entire menu system for a wide variety of functions. For example, modifications
made within a menu are usually not saved unless a SAVE soft-key is pressed. EXIT is also another common soft-key
function.
Arrow (Cursor) Keys:
The four red arrow keys are used to scroll up, down, left, and right to navigate in the menu system, and to select items
or change fields on the screen. The arrow keys are also often used to change parameters or increment/decrement
values in the menu system.
Contrast Key:
The key with a circular symbol on it is for adjusting the light/dark contrast on the LCD display. Press and hold the key
until the desired contrast is achieved. It is possible to overadjust the contrast and make the entire display completely
blank or completely dark, so be careful to set it to a visible level or it may appear that the unit is not operating.
Function Keys F1 to F6:
The function keys serve as shortcuts to commonly used menu screens, and can be safely pressed at almost any time
without interrupting the sample cycle. The Fkeys are only functional from the main menu screen or for entering
passwords. The factory default password is F1, F2, F3, F4.
F1 Current: This key is a shortcut to the OPERATE > INST screen, used to display the instantaneous data values
that are being measured by the APDA-371. See section 3.12. The F1 key can be used without interrupting a sample
cycle.
F2 Average: This key is a shortcut to the OPERATE > AVERAGE screen, used to display the latest average of the
data recorded by the APDA-371. See Section 3.13. The F2 key can be used without interrupting a sample cycle.
F3 Error Recall: This key allows the user to view the errors logged by the APDA-371. The errors are sorted by
date. The last 12 days which contain error records are available, and up to the last 100 errors can be viewed. The F3
key can be used without interrupting a sample cycle.
F4 Data Recall: This key allows the user to view the data stored in the APDA-371, including concentrations,
flow, and all six external channels. The data is sorted by date, and the user can scroll through the data hour-by-hour
using the soft-keys. Only the last 12 days which contain data records are available in this menu. The F4 key can be
used without interrupting a sample cycle.
F5 Transfer Module: This key is used to copy the memory contents to an optional transfer storage module to
retrieve the digital data without a computer. This function is rarely used. HORIBA recommends downloading the data
with a laptop, computer or modem connection.
F6 (Blank): This key is not assigned a data function.
3.4 Filter Tape Loading
A roll of filter tape must be loaded into the APDA-371 for sampling. One roll of tape should last more than 60 days
under normal operation. It is important to have several spare rolls of tape available to avoid data interruptions. HORIBA
recommends wearing lint-free cotton gloves when handling the tape. Some agencies save the used rolls of tape for

Operation Manual HORIBA APDA-371
Particulate Monitor
Date: April, 2010
______________________________________________________________________________________________________________________
______________________________________________________________________________________________________________________
HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen,  : [phone],  : [phone]
Page 20
post-sampling analysis, although there is no guarantee that the sampled spots have not been contaminated. Used filter
tape should never be “flipped over” or re-used! This will result in measurement problems. Loading a roll of filter tape is a
simple matter using the following steps:
1. Turn the APDA-371 on and enter the TAPE menu (Note: This is not the same as the TEST > TAPE menu). If
the nozzle is not in the UP position, press the TENSION soft-key to raise the nozzle.
2. Lift the rubber pinch roller assembly and latch it in the UP position. Unscrew and remove the clear plastic spool
covers.
3. An empty core tube MUST be installed on the left (take-up) reel hub. This provides a surface for the used tape
to spool-up on. HORIBA supplies a plastic core tube to use with the first roll of tape. After that, you can use the empty
core tube left over from your last roll to spool-up the new roll. Never fasten the filter tape to the aluminum hub.
4. Load the new roll of filter tape onto the right (supply) reel, and route the tape through the transport assembly as
shown in the drawing. Attach the loose end of the filter tape to the empty core tube with cellophane tape or equivalent.
5. Rotate the tape roll by hand to remove excess slack, then install the clear plastic spool covers. The covers will
clamp the rolls to the hubs to prevent slipping.
6. Align the filter tape so that it is centered on all of the rollers. Newer units have score marks on the rollers to aide
in visually centering the tape.
7. Unlatch and lower the pinch roller assembly onto the tape. The APDA will not function if the pinch rollers
are latched up, and it has no way of automatically lowering the roller assembly!
8. Press the TENSION soft-key in the TAPE menu. The APDA-371 will set the tape to the correct tension and alert
you if there was an error with the process. Exit the menu.
Filter Tape Loading Diagram
3.5 Self-Test
The APDA-371 has a built-in self-test function which automatically tests most of the tape control and flow systems of
the unit. The self-test should be run right after each time the filter tape is changed, and it can also be used if the