Vaisala AQT400 User manual
M211930EN-A
User Guide
Air Quality Transmitter
AQT400
PUBLISHED BY
Vaisala Oyj
Street address: Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland
Mailing address: P.O. Box 26, FI-00421 Helsinki, Finland
Phone: +358 9 8949 1
Fax: +358 9 8949 2227
Visit our Internet pages at www.vaisala.com.
© Vaisala Oyj 2017
No part of this manual may be reproduced,
published or publicly displayed in any form
or by any means, electronic or mechanical
(including photocopying), nor may its
contents be modified, translated, adapted,
sold or disclosed to a third party without
prior written permission of the copyright
holder. Translated manuals and translated
portions of multilingual documents are
based on the original English versions. In
ambiguous cases, the English versions are
applicable, not the translations.
The contents of this manual are subject to
change without prior notice.
Local rules and regulations may vary and
they shall take precedence over the
information contained in this manual.
Vaisala makes no representations on this
manual’s compliance with the local rules
and regulations applicable at any given
time, and hereby disclaims any and all
responsibilities related thereto.
This manual does not create any legally
binding obligations for Vaisala towards
customers or end users. All legally binding
obligations and agreements are included
exclusively in the applicable supply
contract or the General Conditions of Sale
and General Conditions of Service of
Vaisala.
This product contains software developed
by Vaisala or third parties. Use of the
software is governed by license terms and
conditions included in the applicable
supply contract or, in the absence of
separate license terms and conditions, by
the General License Conditions of Vaisala
Group.
This product may contain open source
software (OSS) components. In the event
this product contains OSS components,
then such OSS is governed by the terms
and conditions of the applicable OSS
licenses, and you are bound by the terms
and conditions of such licenses in
connection with your use and distribution
of the OSS in this product. Applicable OSS
licenses are included in the product itself
or provided to you on any other applicable
media, depending on each individual
product and the product items delivered
to you.
Table of Contents
1. About This Document........................................................................................ 5
1.1. Version Information............................................................................................... 5
1.2. Documentation Conventions................................................................................ 5
2. Product Overview................................................................................................ 7
2.1. Introduction to AQT400........................................................................................7
2.2. Safety.......................................................................................................................8
2.2.1. ESD Protection.................................................................................................9
2.3. Regulatory Compliances....................................................................................... 9
3. System Functional Description......................................................................11
4. Installation.............................................................................................................13
4.1. Selecting Location................................................................................................ 13
4.2. Unpacking..............................................................................................................13
4.3. Installing to Mast or Wall..................................................................................... 13
4.4. Connecting Cables............................................................................................... 14
4.5. Using Serial Interfaces......................................................................................... 14
4.6. Switching on Power Supply.................................................................................15
5. Measurements......................................................................................................17
5.1. Stabilization Period.............................................................................................. 17
5.2. Measured Variables...............................................................................................17
5.3. Measuring Units.................................................................................................... 17
5.4. Impact of Ambient Conditions............................................................................17
6. Configuration and Operation........................................................................ 19
6.1. Installing AQT Configuration Tool...................................................................... 19
6.2. Using AQT Configuration Tool............................................................................ 19
6.3. Connecting to Management Console.................................................................21
6.4. Using General Commands.................................................................................. 22
6.5. Using Configuration Parameters........................................................................22
7. Data Formats.......................................................................................................25
7.1. Data Format in ASCII Mode................................................................................ 25
7.2. Data Format in Modbus Mode............................................................................25
8. Maintenance.........................................................................................................29
8.1. Overview to Maintenance...................................................................................29
8.2. Factory Calibration..............................................................................................29
8.3. Performance Check During Operation..............................................................29
9. Troubleshooting..................................................................................................31
9.1. Writing Problem Report.......................................................................................31
10. Technical Data.....................................................................................................33
10.1. AQT410 Specifications........................................................................................ 33
10.2. AQT420 Specifications....................................................................................... 35
Appendix A: Performance Check.......................................................................39
Appendix B: Accessories....................................................................................... 43
Table of Contents
1
Index............................................................................................................................... 45
Technical Support............................................................................................................47
Warranty...........................................................................................................................47
Recycling.......................................................................................................................... 47
AQT400 User Guide M211930EN-A
2
List of Tables
Table 1 Document Versions................................................................................................5
Table 2 List of parameters................................................................................................22
Table 3 CSV Output Format.............................................................................................25
Table 4 Modbus Function Codes.................................................................................... 25
Table 5 Modbus Register Addresses............................................................................. 26
Table 6 Troubleshooting AQT400...................................................................................31
Table 7 Measuring Specifications...................................................................................33
Table 8 Gas Measuring Specifications...........................................................................33
Table 9 Electrical Specifications.....................................................................................34
Table 10 Environmental Specifications...........................................................................34
Table 11 Data Connection Specifications...................................................................... 34
Table 12 Mechanical Specifications................................................................................. 34
Table 13 Measuring Specifications...................................................................................35
Table 14 Gas Measuring Specifications...........................................................................35
Table 15 Particle Measuring Specifications................................................................... 36
Table 16 Electrical Specifications.....................................................................................36
Table 17 Environmental Specifications...........................................................................36
Table 18 Data Connection Specifications.......................................................................36
Table 19 Mechanical Specifications................................................................................. 37
AQT400 User Guide M211930EN-A
4
1. About This Document
1.1. Version Information
This document provides information about the installation, operation, and maintenance of
Vaisala Air Quality Transmitters AQT400.
Table 1 Document Versions
Document Code Date Description
M211930EN October 2016 First version of this manual.
1.2. Documentation Conventions
Warning alerts you to a serious hazard. If you do not read and follow
instructions carefully at this point, there is a risk of injury or even death.
WARNING!
Caution warns you of a potential hazard. If you do not read and follow
instructions carefully at this point, the product could be damaged or important data
could be lost.
CAUTION!
Note highlights important information on using the product.
Tip gives information for using the product more eciently.
Lists tools needed to perform the task.
Chapter 1 – About This Document
5
Indicates that you need to take some notes during the task.
AQT400 User Guide M211930EN-A
6
2. Product Overview
2.1. Introduction to AQT400
Vaisala Air Quality Transmitter AQT400 measures the pollution content of ambient air. The
AQT400 series consists of two products, AQT410 and AQT420. Both models measure four
gases (CO, NO2, SO2, and O3) and weather data, such as humidity, air pressure, and
temperature in the ambient air. AQT420 additionally includes a laser particle counter for
PM2.5 and PM10 particulate measurements.
You can send the measuring data from the air quality transmitter to local systems through a
serial interface.
AQT400 is enclosed in an IP65-rated weatherproof casing and can be installed outdoors.
The units are compact but robust with no moving parts and low power consumption.
AQT400 can be used in conjunction with a PC, data logger, or other device.
The following features and components are available in AQT410 and AQT420:
• Gas measuring (CO, NO2, SO2, and O3)
• Installation kit
• Installation cable
•Configuration cable
The following feature is available only in AQT420:
• Particle measuring (PM2.5 and PM10)
Chapter 2 – Product Overview
7
Figure 1 Structure of AQT410
1M12 connector
2Sensor elements (four sensors per unit)
3Main electronics board
4Combined temperature and humidity sensor
5Radiation shield
6Integrated pressure sensor
2.2. Safety
This product has been tested for safety. Note the following precautions:
Do not exceed the specified input voltage range.CAUTION!
AQT400 User Guide M211930EN-A
8
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