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© 2021 All rights reserved. Data subject to change without notice. 

19

Rev. B | 2021.08 

cGas Detector Analog Transmitter - Installation Manual

Remote PID Sensors

Part Number

Range

TVOCs

ESH-A-SPL

0 - 30 ppm

ESH-A-SPH

0 - 300 ppm

4.3 RH & Temperature Sensor (Option -RHT)

The CGAS-A is a single channel device, it has one analog output. If ordered 

with an internal or remote gas sensor and a relative humidity and temperature 

sensor, the analog output signal will be used to send the gas reading signal to a 

controller or BAS/DDC. Therefore, the RH & temperature readings are for display 

purposes only, there is no current output or communication back to a controller 

or BAS/DDC for RH or temperature readings when a gas sensor is present.

4.4 Calibration Extending Firmware (CEF) and Sensor Aging

The cGas Detector with integral electrochemical sensor(s) have been

programmed with our CEF. This firmware takes into consideration the aging of

the electrochemical CO and NO2 sensors so that less frequent calibrations are

required in less-critical applications such as parking garages. The system tracks

the age of the sensor and automatically compensates for the reduced output of

the sensor as it ages.

Содержание CGAS-A

Страница 1: ...Rev B 2021 08 www critical environment com CGAS A Gas Detector Analog Transmitter Installation Manual...

Страница 2: ...u 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 disab...

Страница 3: ...eatures 9 3 INSTRUMENT SPECIFICATIONS 11 3 1 Technical Specifications 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...

Страница 4: ...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...

Страница 5: ...ified electrician or factory trained technician and according to instructions indicated in this manual This instrument should be inspected and calibrated regularly by a qualified and trained technicia...

Страница 6: ...t is only to be used for the purposes stated in the manual Critical Environment Technologies is not liable for auxiliary interfaced equipment or consequential damage Prior to shipping equipment to CET...

Страница 7: ...pyright 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 B...

Страница 8: ...cumentation the manufacturer reserves the right to make changes at any time without notice In addition due to improvements made to our products there may be information in this manual that does not ex...

Страница 9: ...in this device are accurate enough to measure to Occupational Health Safety OHS hazardous levels for toxic gases 2 2 Key Features Single gas channel 4 20mA analog output signals gas concentration rea...

Страница 10: ...on RHT is an RH Temperature sensor o C or o F Available with all internal gas sensor configurations except sticky gas sensors Cl2 ClO2 HCI HCN O3 PH3 The CGAS A has one analog output which is used for...

Страница 11: ...0 in x 3 0 in Conduit Entry Points 12 7 mm 1 2 in diameter Mounting Holes 4 47 mm 0 175 in diameter maximum head diameter 8 mm 0 32 in 8 or 4 mm screw USER INTERFACE Display standard 2 line by 16 cha...

Страница 12: ...in conduit Fuses Automatic resetting thermal INPUT OUTPUT Analog Output One Linear 4 20 mA output signals gas reading RH Temperature Option RHT User selectable units o C or o F user selectable display...

Страница 13: ...ERTIFICATION ACNOR COUVRE UNIQUEMENT LES RISQUES DE CHOC ELECTRIQUE ET D INCENDIE D ORIGINE ELECTRIQUE Conforms to CSA C22 2 No 205 12 UL508 Edition 18 2018 Conforms to EMC Directive 2014 30 EU EN 502...

Страница 14: ...m 10 0 in for fully open With the optional splash guard installed the enclosure is IP54 rated NOTE During calibration the sensor response time will be slower with a splash guard installed NOTE The sta...

Страница 15: ...art Number Range Lifespan Ammonia NH3 CGAS A NH3 0 500 ppm 2 yrs Carbon Monoxide CO CGAS A CO 0 200 ppm 3 yrs Chlorine Cl2 CGAS A CL2 0 5 0 ppm 3 yrs CGAS A CL2 10 0 10 ppm 3 yrs Chlorine Dioxide ClO2...

Страница 16: ...O3 CGAS A O3 0 1 0 ppm 2 yrs Phosphine PH3 CGAS A PH3 0 1 0 ppm 2 yrs Silane SiH4 CGAS A SIH4 0 20 ppm 2 yrs Sulphur Dioxide SO2 CGAS A SO2 0 20 ppm 2 yrs Internal Solid State Sensors Part Number Ran...

Страница 17: ...butylene CGAS A STVOC 0 500 ppm 5 yrs Internal Catalytic Combustible Sensors Part Number Range Lifespan Ethanol or Dimethyl Ether C2 H6 O CGAS A CC2H6O 100 0 100 LEL 5 yrs Ethane C2 H6 CGAS A CC2H6 10...

Страница 18: ...al Gas Sensor Part Number Add a remote ESH A sensor CGAS A R 4 2 ESH A Remote Gas Sensor Types Remote Catalytic Combustible Sensors Part Number Range Lifespan Acetylene C2 H2 ESH A CC2H2 100 0 100 LEL...

Страница 19: ...controller or BAS DDC Therefore the RH temperature readings are for display purposes only there is no current output or communication back to a controller or BAS DDC for RH or temperature readings wh...

Страница 20: ...nual Rev B 2021 08 5 INSTRUMENT FEATURES 5 1 Exterior Enclosure NUMBER FEATURE FUNCTION Door Hinge Secures door to base and allows easy opening and closing Display LCD display standard display shown S...

Страница 21: ...ramming Buttons Access menu options and program functions using buttons inside the enclosure Arrow up Enter Arrow down Test Points TP1 TP2 For measuring voltage output TB1 Wiring Terminal Pluggable te...

Страница 22: ...left to warm up for 24 hours prior to considering the gas readings to be accurate NOTE All sensors are calibrated in the factory before they are shipped and should not require calibration at the time...

Страница 23: ...inated hydrocarbon vapours can poison catalytic sensors A bump test will help you determine if a sensor requires calibration If the sensor still does not respond as it should after a successful calibr...

Страница 24: ...being around this type of equipment 6 4 Protection Against Mechanical Risks The door of the enclosure can be removed if absolutely necessary to facilitate installation of the base but it is not recomm...

Страница 25: ...face of the cGas Detector is not obstructed in order to maximize the sensor s exposure to the environment being monitored Two in 12 7 mm conduit entry points are located in the enclosure base one in t...

Страница 26: ...the likelihood of getting faulty readings 1 Locate the detectors and controllers out of the way from normal foot traffic and high energy equipment 2 Confirm the devices are properly grounded using con...

Страница 27: ...ne 3000 279 Carbon Monoxide CO breathing zone 5000 7500 465 697 Chlorine Cl2 6 in 15 cm from floor 3000 279 Ethane C2H6 combustible 6 in 15 cm from floor 3000 279 Propane C3H8 combustible 6 in 15 cm f...

Страница 28: ...de HCN 12 in 30 cm from floor 3000 279 Hydrogen Sulphide H2S 3 ft 91 cm from floor 3000 279 Nitric Oxide NO breathing zone 5000 465 Nitrogen Dioxide NO2 breathing zone 5000 465 Oxygen O2 breathing zon...

Страница 29: ...ation Manual R123 refrigerant only 12 in 30 cm from floor 3000 279 TVOCs target gas dependent 3000 279 6 6 Enclosure Mounting Components 6 6 1 Enclosure Base NUMBER FEATURE Door Hinge Conduit Entry Po...

Страница 30: ...ter Damage from incorrect wiring connections or from too much voltage applied is not covered under warranty All wiring should be run in EMT or better conduit properly earth grounded Signal output and...

Страница 31: ...ass 2 or better transformer need to be used In all cases the voltage supply to the cGas Detector should never drop below 16 VDC or 12 VAC NOTE WARRANTY VOID IF SOLID CORE WIRE IS USED AT THE WIRING TE...

Страница 32: ...PLY VOLTAGE MAXIMUM LOAD Wire Termination Resistor ohms WIRE GAUGE AWG MAXIMUM CABLE LENGTH feet 24 VDC 592 assume a 500 termination resistor 18 7 100 16 10 700 14 20 000 16 VDC 216 assume a 200 termi...

Страница 33: ...ls are normally energized in a non alarm state for failsafe operation Refer to the cGas Detector Operation Manual for more information 6 7 3 ESH A Remote Sensor Wiring Connection Each ESH A is given t...

Страница 34: ...to change without notice cGas Detector Analog Transmitter Installation Manual Rev B 2021 08 Wiring Example ESH A Remote Sensor Note The maximum length of wire between the ESH A Remote Sensor and the c...

Страница 35: ...kes between 2 and 5 minutes depending on the gas sensors type NOTE The cGas Detector will be visible on the controller BAS DDC system during the warm up countdown but a correct reading will not show u...

Страница 36: ...is manual use the UP button A line under a character or number indicates that is the space into which you are entering a character or number Use the ENTER button to move to the next space Or use the U...

Страница 37: ...nt gas level reading for each channel that it has been configured Pressing the UP or DOWN button allows you to scroll through a series of information screens showing the model name serial number and f...

Страница 38: ...n the display 7 4 2 Display Configurations The default display set from the factory is normal mode which displays the gas type gas reading and gas units for CH1 CO2 536 PPM The information can be redu...

Страница 39: ...mitter will indicate a fault condition on the display Normal operation will resume once the fault condition has been corrected NOTE If a question mark is displayed the system is reading slightly negat...

Страница 40: ...ctor has the RHT option installed NOTE Depending on the configuration the device will show the temperature in either Celsius or Fahrenheit The units can be changed at any time refer to Section 7 6 Cha...

Страница 41: ...DOWN and ENTER buttons Temperature Adj 4 0 degC Humidity Adj 02 RH Press ENTER to confirm the value is correct If you entered the wrong value press the UP button to move the cursor to N and press ENTE...

Страница 42: ...en again to Confirm Y Confirm 14 0 mA N Y Test AO 14 0 mA The test will start as soon as you press ENTER to confirm To stop the test press the UP or DOWN button To test another analog output value rep...

Страница 43: ...the UP button and press ENTER on the Exit menu item 8 TROUBLESHOOTING cGas Detector won t power up blank display Is the power properly connected Check the wiring connections Refer to Section 6 7 Wirin...

Страница 44: ...sensor will normally resolve this F02 Smart Board Fault cGas cannot communicate with the smart board Ensure the smart board is installed and installed on the correct side left if a single channel unit...

Страница 45: ...rd is installed in the correct socket ie CH1 gas should be in the left socket When confirmed if still in error use Write to Sensor for the indicated channel passcode 3022 F07 RH Temp Fault cGas cannot...

Страница 46: ...46 2021 All rights reserved Data subject to change without notice cGas Detector Analog Transmitter Installation Manual Rev B 2021 08 NOTES...

Страница 47: ...2021 All rights reserved Data subject to change without notice 47 Rev B 2021 08 cGas Detector Analog Transmitter Installation Manual NOTES...

Страница 48: ...7 Rev B Unit 145 7391 Vantage Way Delta BC V4G 1M3 Canada Tel 1 604 940 8741 Toll Free 1 877 940 8741 2021 All rights reserved Data subject to change without notice www critical enviroment com SAFER A...

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