Critical Environment Technologies CGAS-A User manual
Rev. B | 2021.08
www.critical-environment.com
CGAS-A Gas Detector
Analog Transmitter
Installation Manual
2 © 2021 All rights reserved. Data subject to change without notice.
cGas Detector Analog Transmitter - Installation Manual Rev. B | 2021.08
NEED MORE INFORMATION?
This is the Installation Manual for the cGas Detector Analog Transmitter. If you
would like it in pdf form, click here to open and download it from our website.
If you need more information, refer to the cGAS Detector Operation Manual,
which covers topics such as:
• Relays - enable/disable, set ON/OFF Delays
• Enable/Disable Channels
• Replacing Plug & Play Smart Sensors
• Calibration
• Accessories
• Maintenance
• Troubleshooting
If you would like to view or download the cGAS Detector Operation Manual
from our website click here
© 2021 All rights reserved. Data subject to change without notice. 3
Rev. B | 2021.08 cGas Detector Analog Transmitter - Installation Manual
TABLE OF CONTENTS
1 POLICIES .......................................................................................................5
1.1 Important Note....................................................................................... 5
1.2 Warranty Policy ...................................................................................... 6
1.3 Service Policy ......................................................................................... 6
1.4 Copyrights .............................................................................................. 7
1.5 Disclaimer............................................................................................... 7
1.6 Revisions ................................................................................................ 8
2 INTRODUCTION .............................................................................................9
2.1 General Description................................................................................ 9
2.2 Key Features........................................................................................... 9
3 INSTRUMENT SPECIFICATIONS..................................................................11
3.1 Technical Specications...................................................................... 11
3.2 Enclosure Dimensions......................................................................... 14
4 SENSOR SPECIFICATIONS ..........................................................................15
4.1 Internal Gas Sensor Types................................................................... 15
4.2 ESH-A- Remote Gas Sensor Types...................................................... 18
4.3 RH & Temperature Sensor (Option -RHT) ........................................... 19
4.4 Calibration Extending Firmware (CEF) and Sensor Aging................. 19
5 INSTRUMENT FEATURES ............................................................................20
5.1 Exterior Enclosure................................................................................ 20
5.2 Interior System Layout......................................................................... 21
6 INSTALLATION ............................................................................................22
6.1 Special Considerations for Different Types of Sensors..................... 22
6.2 General Safety Warnings ..................................................................... 23
6.3 Protection Against Electrical Risks..................................................... 24
4 © 2021 All rights reserved. Data subject to change without notice.
cGas Detector Analog Transmitter - Installation Manual Rev. B | 2021.08
6.4 Protection Against Mechanical Risks................................................. 24
6.5 Mounting the Transmitter.................................................................... 25
6.5.1 Wet Environment Considerations ................................................ 25
6.5.2 EMI and RF Interference Considerations ................................... 26
6.5.3 Mounting Heights (Sensor Dependent)...................................... 26
6.6 Enclosure Mounting Components ...................................................... 29
6.6.1 Enclosure Base................................................................................ 29
6.6.2 Enclosure Bottom ........................................................................... 30
6.7 Wiring Connections.............................................................................. 30
6.7.1 Analog Wire Gauge vs Run Length.............................................. 32
6.7.2 Wiring the Relay Smart Board (models with Option -RLY)...... 33
6.7.3 ESH-A Remote Sensor Wiring Connection................................. 33
7 BASIC SYSTEM OPERATION .......................................................................35
7.1 Power-up and Warm-up Process from the Factory............................ 35
7.2 Navigating the Menu Structure ........................................................... 36
7.3 Accessing the Menu with Passcodes................................................. 36
7.4 Display Settings.................................................................................... 37
7.4.1 Adjust Display Brightness ............................................................. 37
................................................................... 38
7.5 Alarm Status, Fault Detection and Communication Failure Alerts ... 39
7.6 Change Units (oC or oF) of Temperature Readings............................. 39
7.7 Temperature and / or Relative Humidity Offset ................................. 40
7.8 Test Functions...................................................................................... 41
7.8.1 Test Analog Output......................................................................... 41
7.8.2 Test Relay (models with Option -RLY)......................................... 42
8 TROUBLESHOOTING....................................................................................43
© 2021 All rights reserved. Data subject to change without notice. 5
Rev. B | 2021.08 cGas Detector Analog Transmitter - Installation Manual
1 POLICIES
1.1 Important Note
Read and understand this manual prior to using this instrument. Carefully read
the warranty policy, service policy, notices, disclaimers and revisions on the
following pages.
technician and according to instructions indicated in this manual. This
trained technician.
This instrument has not been designed to be intrinsically safe. For your safety,
do not
INSTRUMENT SERIAL NUMBER:
______________________________________________________
PURCHASE DATE:
______________________________________________________
PURCHASED FROM:
______________________________________________________
6 © 2021 All rights reserved. Data subject to change without notice.
cGas Detector Analog Transmitter - Installation Manual Rev. B | 2021.08
1.2 Warranty Policy
Critical Environment Technologies Canada Inc. warrants the products we
to be free from defects in materials and workmanship for a period of two years
from the date of purchase from our facility. Sensors are consumable items and
once they leave our factory, we cannot reuse or resell them. As such, all sensor
warranty that would apply from the date of purchase from our facility.
The warranty status may be affected if the instrument has not been used and
maintained as per the instructions in the manual or has been abused, damaged,
interfaced equipment or consequential damage.
returned goods, regardless of reason, must be accompanied with an RMA
number. Please read our Warranty and Returns Policy and follow our RMA
Instructions and Form.
Due to ongoing research, development, and product testing, the manufacturer
contained herein is based on data considered accurate. However, no warranty is
1.3 Service Policy
CETCI maintains an instrument service facility at the factory. Some CETCI
distributors / agents may also have repair facilities; however, CETCI assumes
no liability for service performed by anyone other than CETCI personnel.
Repairs are warranted for 90 days after date of shipment (sensors have
individual warranties). Should your instrument require non-warranty repair, you
© 2021 All rights reserved. Data subject to change without notice. 7
Rev. B | 2021.08 cGas Detector Analog Transmitter - Installation Manual
may contact the distributor from whom it was purchased, or you may contact
CETCI directly.
returned goods, regardless of reason, must be accompanied with an RMA
number. Please read our Warranty and Returns Policy and follow our RMA
Instructions and Form.
If the product is deemed repairable, for liability reasons, CETCI will perform all
necessary repairs to restore the instrument to its full operating condition.
1.4 Copyrights
This manual is subject to copyright protection; all rights are reserved. Under
international and domestic copyright laws, this manual may not be copied or
translated, in whole or in part, in any manner or format, without the written
permission of CETCI.
Modbus® is a registered trademark of Gould Inc. Corporation.
BACnet® is a registered trademark of American Society of Heating,
Refrigeration and Air Conditioning (ASHRAE).
1.5 Disclaimer
Under no circumstances will CETCI be liable for any claims, losses or damages
by a party other than CETCI service technicians, or by operation or use of the
equipment other than in accordance with the printed instructions contained
within this manual or if the equipment has been improperly maintained or
subjected to neglect or accident. Any of the forgoing will void the warranty.
Under most local electrical codes, low voltage wires cannot be run within the
same conduit as line voltage wires. It is CETCI policy that all wiring of our
8 © 2021 All rights reserved. Data subject to change without notice.
cGas Detector Analog Transmitter - Installation Manual Rev. B | 2021.08
products meet this requirement and all wiring be within properly grounded
(earth or safety) conduit.
1.6 Revisions
This manual was written and published by CETCI. The manufacturer makes
All information contained in this manual is believed to be true and accurate at
the time of printing. However, as part of its continuing efforts to improve its
products and their documentation, the manufacturer reserves the right to make
changes at any time without notice. In addition, due to improvements made to
version of the product the user has. Should you detect any error or omission
in this manual, or should you want to inquire regarding upgrading the device’s
Critical Environment Technologies Canada Inc.
Unit 145, 7391 Vantage Way, Delta, BC, V4G 1M3, Canada
Toll Free: +1.877.940.8741
Telephone: +1.604.940.8741
Email: [email protected]
Website: www.critical-environment.com
incidental or consequential damages resulting from any defect in any manual,
even if advised of the possibility of such damages.
© 2021 All rights reserved. Data subject to change without notice. 9
Rev. B | 2021.08 cGas Detector Analog Transmitter - Installation Manual
2 INTRODUCTION
2.1 General Description
Thank you for purchasing our CGAS-A analog cGas Detector, a single sensor, 4
- 20 mA transmitter available with a wide range of sensors and sensor types for
applications.
The CGAS-A transmitter is available with internal or remote sensor and operates
2.2 Key Features
• Single gas channel
• 4 - 20mA analog output (signals gas concentration reading)
• Easy Plug & Play Smart sensor replacement at end of life
• Pre-calibrated replacement sensors
• 24 volt DC or (ground referenced) AC power
•
• Bright LCD display
• Option -LT*: Low temperature package for improved usability in cold
environments
• Option -RHT**: Relative Humidity and Temperature sensor
•
• Option -S: Splash guard, factory installed, IP54 rated enclosure
• Option -SN: Splash guard for sticky gas sensors, factory installed
• Standard water / dust tight, corrosion resistant enclosure (drip proof)
10 © 2021 All rights reserved. Data subject to change without notice.
cGas Detector Analog Transmitter - Installation Manual Rev. B | 2021.08
• Copper coated interior to reduce RF interference
• RoHS compliant circuit boards
• Auto resetting fuse
NOTE:
*Option -LT is a low temperature package with OLED display and internal heater
for cold environment applications down to -40°C / -40°F. Available with all
**Option -RHT is an RH & Temperature sensor (oC or oF). Available with all
2, ClO2, HCI,
HCN, O3, PH3). The CGAS-A has one analog output which is used for gas
be locally displayed only.
***Option -RLY
2and sticky gas
sensors (Cl2, ClO2, HCI, HCN, O3, PH3).
Options -RHT and -RLY are both available with CGAS-A-CO only.
If after reading through the manual, you have any questions, please do not
hesitate to contact our service department for technical support.
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