Vaisala CARBOCAP GMT220 SERIES User manual

USER'S GUIDE
Vaisala CARBOCAP® Carbon Dioxide
Transmitter Series
GMT220
M010022EN-E

PUBLISHED BY
Vaisala Oyj Phone (int.): [phone]
P.O. Box 26 Fax: [phone]
FI-00421 Helsinki
Finland
Visit our Internet pages at http://www.vaisala.com/
© Vaisala 2008
No part of this manual may be reproduced in any form or by any means, electronic or
mechanical (including photocopying), nor may its contents be communicated to a third
party without prior written permission of the copyright holder.
The contents are subject to change without prior notice.
Please observe that this manual does not create any legally binding obligations for
Vaisala towards the customer or end user. All legally binding commitments and
agreements are included exclusively in the applicable supply contract or Conditions of
Sale.

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Table of Contents
CHAPTER 1
GENERAL INFORMATION............................................................................3
About This Manual...................................................................3
Version Information...............................................................3
Related Manuals...................................................................3
General Safety Considerations.............................................4
Feedback...............................................................................4
Product Related Safety Precautions......................................4
ESD Protection .........................................................................5
Recycling ..................................................................................5
Warranty....................................................................................5
CHAPTER 2
PRODUCT OVERVIEW..................................................................................7
GMT220 Transmitter Parts ......................................................7
LED Indicators and Optional Display.....................................9
CHAPTER 3
INSTALLATION............................................................................................11
Wall Mounting.........................................................................11
Duct or Channel Mounting ....................................................12
Connections............................................................................13
Power Supply Requirements ................................................14
Connection to a 24 VAC Supply ...........................................14
Relays......................................................................................15
CHAPTER 4
OPERATION.................................................................................................17
Getting Started .......................................................................17
Serial Commands...................................................................18
Setting Relay Trigger Points ...............................................19
Pressure Compensation......................................................20
Temperature Setting ...........................................................20
Display Setting ....................................................................21
Setting Current Output Range.............................................21
Error States.............................................................................22
Non-critical and Fatal Errors ...............................................22
Error Indication in Transmitters without Display..................23
Error Messages ......................................................................23

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CHAPTER 5
MAINTENANCE............................................................................................25
Replacing the Probe...............................................................25
Transmitter with Integrated Probe (Wall Model)..................25
Transmitter with Remote Probe...........................................25
Check and Calibration............................................................26
Comparison with Calibrated Probe......................................26
Calibrator GMK220..............................................................27
On-site Checking and Adjusting with Reference Gas and
GM70 Hand-Held Meter......................................................27
Two-Point Adjustment Procedure........................................28
One-Point Adjustment Procedure........................................30
Technical Support ..................................................................32
Vaisala Service Centers.........................................................33
CHAPTER 6
TECHNICAL DATA ......................................................................................35
Technical specifications........................................................35
Inputs and outputs...............................................................36
Operating conditions............................................................36
Mechanics ...........................................................................36
Electromagnetic compatibility..............................................37
Accessories.........................................................................37
Dimensions in mm (inches)...................................................38

Chapter 1 ________________________________________________________ General Information
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CHAPTER 1
GENERAL INFORMATION
This chapter provides general notes for the manual and the product.
About This Manual
This manual provides information for installing, operating, and
maintaining Carbon Dioxide Transmitter Series GMT220.
Version Information
Table 1 Manual Revisions
Manual Code Description
M010022EN-C September 2002
M010022EN-D August 2008
M010022EN-E October 2008 - Updated technical specification
Related Manuals
Table 2 Related Manuals
Manual Code Manual Name
M010139EN-E Vaisala CARBOCAP®Hand-Held Carbon Dioxide
Meter GM70 User's Guide

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General Safety Considerations
Throughout the manual, important safety considerations are
highlighted as follows:
WARNING Warning alerts you to a serious hazard. If you do not read and follow
instructions very carefully at this point, there is a risk of injury or
even death.
CAUTION 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.
NOTE Note highlights important information on using the product.
Feedback
Vaisala Customer Documentation Team welcomes your comments
and suggestions on the quality and usefulness of this publication. If
you find errors or have other suggestions for improvement, please
indicate the chapter, section, and page number. You can send
comments to us by e-mail: [email protected]
Product Related Safety Precautions
The Carbon Dioxide Transmitter Series GMT220 delivered to you has
been tested for safety and approved as shipped from the factory. Note
the following precautions:
WARNING Ground the product, and verify outdoor installation grounding
periodically to minimize shock hazard.
CAUTION Do not modify the unit. Improper modification can damage the
product or lead to malfunction.

Chapter 1 ________________________________________________________ General Information
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ESD Protection
Electrostatic Discharge (ESD) can cause immediate or latent damage
to electronic circuits. Vaisala products are adequately protected
against ESD for their intended use. However, it is possible to damage
the product by delivering electrostatic discharges when touching,
removing, or inserting any objects inside the equipment housing.
To make sure you are not delivering high static voltages yourself:
- Handle ESD sensitive components on a properly grounded and
protected ESD workbench. When this is not possible, ground
yourself to the equipment chassis before touching the boards.
Ground yourself with a wrist strap and a resistive connection cord.
When neither of the above is possible, touch a conductive part of
the equipment chassis with your other hand before touching the
boards.
- Always hold the boards by the edges and avoid touching the
component contacts.
Recycling
Recycle all applicable material.
Dispose of batteries and the unit according to statutory regulations.
Do not dispose of with regular household refuse.
Warranty
Vaisala issues a guarantee for the material and workmanship of this
product under normal operating conditions for one (1) year from the
date of delivery. Exceptional operating conditions, damage due to
careless handling and misapplication will void the guarantee.

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Chapter 2 __________________________________________________________ Product Overview
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CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces the Carbon Dioxide Transmitter Series
GMT220.
GMT220 Transmitter Parts
Vaisala’s GMT220 transmitters are versatile instruments for
measuring CO2in industrial applications. The CARBOCAP®sensor is
silicon based and its operation is based on the NDIR Single-Beam
Dual-Wavelength principle.
0807-032
Figure 1 GMT220 with Integrated Probe

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The following numbers refer to Figure 1 on page 7:
1 = Transmitter cover
2 = Transmitter housing
3 = Integrated probe (interchangeable)
4 = Printed protective film
5 = Tightening screw
6 = Cable gland (I.D. 6 mm)
0807-033
Figure 2 GMT220 with Probe Installed Remotely
The following numbers refer to Figure 2 above:
7 = Remote probe (interchangeable)
8 = Probe cable (2m)
9 = Clamping sleeve
10 = Cable clamp
11 = Pin connector for a serial COM adapter
12 = Probe mounting clips (optional)
13 = Mounting flange (optional)
14 = Fixing screws (4 pcs)