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Critical Environment Technologies CGAS-A-VLT-NH3-S, Addendum

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Critical Environment Technologies CGAS-A-VLT-NH3-S Addendum Download Page 8

cGas Ammonia Vent Line Transmitter - Addendum 

Rev. B | 2022.09

8 

© 2022 All rights reserved. Data subject to change without notice. 

The area required for enclosure door to be open 90 degrees is 178 mm / 7.0 in or 254 mm / 

10.0 in for fully open.  With the optional splash guard installed, the enclosure is IP54 rated.

2.3 Exterior Enclosure - Front

NUMBER

FEATURE

FUNCTION

Door Hinge

Secures door to base and allows easy 

opening and closing

Display

LCD display (standard display shown)

Splash Guard

Covers unused sensor vent, protects 

from water/dust ingress, IP45 rated

Door Screw

Secures door shut

Lock Slot

For security padlock or tie

13mm / 1.5 in water tight 

cable restraint

Water tight conduit entry for shielded 

18 awg stranded cable. For outdoor 

applications, weather proof and UV 

protected cable is suggested.

Summary of Contents for CGAS-A-VLT-NH3-S

Page 1: ...www critical environment com cGas Detector Ammonia Vent Line Transmitter Rev B 2022 09 Addendum for cGas Detector Operation Manual ...

Page 2: ... Manual Refer to the cGas Detector Operation Manual for information on Policies Warranty Copyrights Basic Operation and Instrument Settings Display Settings Alarm Status and Fault Settings Alarm Setpoints Enable Disable Channel Relay Operation Test Functions Modbus and BacNet Configuration digital model cGas Ammonia Vent Line Detector Part Numbers CGAS A VLT NH3 S CGAS D VLT NH3 S INSTRUMENT SERIA...

Page 3: ...terior Enclosure Back 9 2 5 Interior Enclosure 9 3 SENSOR SPECIFICATIONS AND CONSIDERATIONS 10 4 INSTALLATION 11 5 CALIBRATION 11 5 1 Remove Detector from Vent Stack 12 5 2 Set Calibration Gas Value 13 5 3 Attach Calibration Adapter with Tubing 13 5 4 Zero Null Calibration 14 5 5 Span Calibration 14 5 6 Troubleshooting Calibration 15 5 3 1 Calibration Adapter Plug Doesn t Fit 16 5 3 2 Zero Fault 1...

Page 4: ...t for technical support This product must be installed by a qualified 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 technician This instrument has not been designed to be intrinsically safe For your safety do not use it in classified hazardous areas explosion r...

Page 5: ... x 3 3 in Completely assembled product 127 x 127 x 182 5 mm 5 0 x 5 0 x 7 18 in Coupler 19 5 mm 3 4 inch NPT cast steel Sensor Assembly Length including coupler 98 5 mm 3 875 inches 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 character graphic LCD user configura...

Page 6: ...r 4 20 mA output signals gas reading RH Temperature Option RHT User selectable units o C or o F with user selectable display or hide readings Digital Output CGAS D VLT model User configurable in the field BACnet MS TP version 1 rev 14 RS 485 or Modbus RTU version 1 1b3 RS 485 Relay Option RLY Optional SPDT dry contact relay rated 30 volts 2 amps ENVIRONMENTAL Operating Temperature 0 C to 40 C 32 F...

Page 7: ...18 Conforms to EMC Directive 2014 30 EU EN 50270 2015 Type 1 EN61010 Conforms to FCC This device complies with part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation 2 2 Enclosure Dimensions ...

Page 8: ... rated 2 3 Exterior Enclosure Front NUMBER FEATURE FUNCTION Door Hinge Secures door to base and allows easy opening and closing Display LCD display standard display shown Splash Guard Covers unused sensor vent protects from water dust ingress IP45 rated Door Screw Secures door shut Lock Slot For security padlock or tie 13mm 1 5 in water tight cable restraint Water tight conduit entry for shielded ...

Page 9: ...pipe with potted sensor screws into the cast steel mounting plate Cast steel sensor mounting plate 19 mm 3 4 in cast steel coupler for connecting to mounting pipe 13 mm 1 2 in water tight cable restraint If using conduit replace with liquid tight type conduit fitting 2 5 Interior Enclosure The sensor is potted behind the enclosure and wires pass from the back of the enclosure into the interior of ...

Page 10: ...be replaced If you install and power up the cGas Ammonia Vent Line Detector as soon as it arrives the sensor will require about a 5 minute warm up period The sensor goes through a burn in period at our factory so it is ready for operation upon arrival If the device is not installed within two weeks of delivery the sensor may require a longer warm up time to stabilize and provide accurate readings ...

Page 11: ...rs the unused sensor vent in the front of the enclosure protects the device from water and dust ingress Any water or physical damage to the transmitter that occurs from the installer drilling installation holes will not be covered under warranty If using the conduit fitting at the bottom of the enclosure it must be the liquid tight type FOR MORE INFORMATION ON INSTALLATION INCLUDING WIRING CONNECT...

Page 12: ...in place Unscrew the wide ring portion of the coupler and carefully remove the device from the mounting pipe Be careful to not handle the device roughly resulting in disconnecting or loosening the wires IMPORTANT The catalytic sensor is very susceptible to shock when working with the sensor do not hit it Manually loosen then senso When replacing the fitting does not have to be pressurized so minim...

Page 13: ...scode 3032 using the UP button and ENTER button Enter Password 3032 Press ENTER to access the Calibrate Menu Calibrate Menu Press Enter In the Selected Channel menu confirm the desired channel is showing Selected Channel NH3 Press the UP button to accept the displayed calibration gas value if it is correct Or press ENTER and change the value using the UP or DOWN buttons Calibration Gas 0 5 vol NH3...

Page 14: ...ibrate Zero 100 AD Press ENTER if using ambient air or attach the regulator to the cylinder of zero air insert the calibration adapter into the sensor opening on the front of the enclosure door refer to Section 6 3 1 Calibration Adapter Plug if the adapter will not fit Press ENTER to start the Zero calibration The display will show a countdown from 20 seconds Zeroing 47AD 18s Zero Success 56AD Whe...

Page 15: ...e UP and ENTER buttons Confirm CalGas 0 5 vol N Y Press ENTER to confirm Attach the regulator to the span gas cylinder and flow the span gas over the sensor You have 120 seconds to start flowing the gas If the gas isn t detected the display will return to Calibrate Span Waiting for Gas 53AD 35s When the gas is detected the display will show stabilizing for a countdown from 120 seconds and then spa...

Page 16: ... fault then the sensor needs to be replaced Over time a sensor degrades and when it has gone beyond an acceptable level it has reached its end of life and will no longer pass a calibration If replacing the sensor does not correct the fault please contact Technical Service at help cetci com 5 6 4 Zero Override If the gas level possible residual gas is too high but still within the override range th...

Page 17: ...e and remove the old assembly completely Feed the wires and new smart board through the hole in the back of the enclosure into the interior of the transmitter and screw the new sensor pipe assembly into the back of the transmitter and Press smart board into the left side socket and replace the 3 screws IMPORTANT The catalytic sensor is very susceptible to shock when working with the sensor do not ...

Page 18: ...nections and possible interferences and try a complete calibration procedure from the beginning again to see if this corrects the fault If a second calibration does not resolve the fault then the sensor needs to be replaced Check to make sure the gas cylinder isn t empty Frequent unexpected alarm signal sent to BAS DDC Check to see if EMI and RF interference is causing the equipment to react this ...

Page 19: ... single channel unit Otherwise power cycle or replace the sensor smart board F03 CO2 Communication Fault cGas cannot communicate with the CO2 sensor even though it can communicate with the smart board Power cycle or replace the sensor smart board F04 POT chip has failed The internal smart sensor board gainPOT chip has failed If a power cycle does not resolve this replace the sensor smart board F05...

Page 20: ...Canada Inc All rights reserved Data in this publication may change without notice CGAS VLT 20220902 Unit 145 7391 Vantage Way Delta BC V4G 1M3 Canada Tel 1 604 940 8741 Toll Free 1 877 940 8741 www critical enviroment com SAFER AIR EVERYWHERE ...

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