Critical Environment Technologies cGas-SC Operation Manual
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Critical Environment Technologies cGas-SC Operation Manual

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Operation Manual
Rev. F | 2024.03
cGas-SC
Self-Contained Controller
www.critical-environment.com

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Summary of Contents for Critical Environment Technologies cGas-SC

  • Page 1 Operation Manual Rev. F | 2024.03 cGas-SC Self-Contained Controller www.critical-environment.com...
  • Page 2 • Mounting and Installing • Wiring Connections • Relay Connections If you would like to view or download the cGas-SC Installation Manual from our website click here If after reading through the manual, you have any questions, please do not hesitate to contact Technical Support at help@cetci.com...

  • Page 3: Table Of Contents

    Rev. F | 2024.03 cGas-SC - Operation Manual TABLE OF CONTENTS 1 POLICIES ......................6 1.1 Important Note ......................... 6 1.2 Warranty Policy ......................... 6 1.3 Service Policy ..........................7 1.4 Copyrights ..........................7 1.5 Disclaimer ..........................7 1.6 Revisions ............................ 7 2 SAFETY INFORMATION ..................
  • Page 4 - Operation Manual Rev. F | 2024.03 4.11 Relays, Buzzer and Strobe Settings ..................22 4.11.1 Enable / Disable Relays, Buzzer and /or Strobe ..........23 4.11.2 Set Relay ON / OFF Delays ..................24 4.12 Relay Mode of Operation ....................26 4.12.1 Failsafe / Normal .....................26 4.12.2 Silenceable / Non-Silenceable ................26...
  • Page 5 Rev. F | 2024.03 cGas-SC - Operation Manual 9 CALIBRATION ....................44 9.1 Calibration Specifications .....................44 9.1.1 Gas ..........................44 9.1.2 Regulators & Flow......................45 9.1.3 Adapters ........................45 9.1.4 Calibration Frequency ....................45 9.1.5 Gas Testing Frequency (Bump Testing) ..............46 9.1.6 Sticky Gases .......................46 9.2 Calibrating the Internal Sensor(s)..................46...

  • Page 6: Policies

    ______________________________________________________ 1.2 Warranty Policy Critical Environment Technologies Canada Inc. warrants the products we manufacture (excluding sensors, battery packs, batteries, pumps, and filters) to be free from defects in materials and workmanship for a period of two years from the date of purchase from our facility.

  • Page 7: Service Policy

    Rev. F | 2024.03 cGas-SC - Operation Manual accuracy of this dataon data considered accurate. However, no warranty is expressed or implied regarding the accuracy of this data. 1.3 Service Policy CETCI maintains an instrument service facility at the factory. Some CETCI distributors / agents may also have repair facilities;...

  • Page 8: Safety Information

    There are no replaceable components except the smart sensor boards. The cGas-SC is intended for indoor use, permanently mounted upright at a height that is appropriate for the type of gas being monitored. Care should be take to ensure that excess water or dust are not somehow entering the enclosure and physically damaging the circuit board or internal components.

  • Page 9: Protection Against Electrical Risks

    Power supply shall have a building installed circuit breaker / switch that is suitably located and easy to access when servicing is required and should be labelled as cGas-SC supply (disconnecting power to the cGas-SC). Appropriate markings should be visible at the circuit breaker / switch that is supplying power to the cGas-SC.

  • Page 10: Sensor Lifespan Information

    3.2 Sensor End of Life (EOL) Notification The cGas-SC Self Contained Controller has a sensor end of life notification feature that tracks the number of days the sensor has been powered since installation. This is a useful feature that helps users keep track of the sensor’s lifespan and plan for its replacement in advance.

  • Page 11: Enable/Disable Sensor Eol Notification

    Rev. F | 2024.03 cGas-SC - Operation Manual Sensor Lifespan Sensor Lifespan Total 36 Months >Left 26 Months Press OK and navigate to EXIT or to the next channel to view its sensor lifespan following the same steps. NOTE: The countdown will change from months to days when the remaining lifespan reaches 30 days.

  • Page 12: Catalytic Sensors

    - Operation Manual Rev. F | 2024.03 • Paint fumes, cleaning products, dust, sand, water and insects can reduce lifespan and compromise performance. • Avoid exposure to high concentrations of solvent vapors during storage, installation and operation. Organic solvents may block the sensing electrodes, create false baselines and in some cases damage the electrodes and physically damage the body of the sensor.

  • Page 13: Solid State Sensors

    Rev. F | 2024.03 cGas-SC - Operation Manual that are absorbed by sensor which can result in the temporary loss of sensitivity. Sensor might recover after a period of operation in clean air. Even when the sensor is not powered, exposure to compounds that poison or inhibit the sensor can impact its lifespan.

  • Page 14: Optical Photo Ion (Particulate) Sensors

    The cGas-SC will be visible on the controller / BAS / DDC system during the power up countdown and will output a default value to prevent alarms until the system is fully powered up.

  • Page 15: Accessing The Menu With Passcodes

    NOTE: Except when conducting test functions, the gas detection and alarm reactions of the cGas-SC will continue to function as normal during menu use. 4.3 Display Settings The LCD display can display up to 2-lines of 16-characters. After warm-up and upon normal operation, the display will show the current gas level reading for each channel that it has been configured.

  • Page 16: Display Configurations

    - Operation Manual Rev. F | 2024.03 Enter passcode 2019 and press the OK button. Enter Passcode 2019 Navigate to the Display parent menu and then to the Brightness menu item. Choose Menu Brightness >Display Enter the numeric value as desired and press OK.

  • Page 17: Alarm Status, Fault Detection And Communication Failure Notifications

    High alarm high The cGas-SC has built in fault detection, and in the event of a problem with the measurement circuitry the transmitter will indicate a fault condition on the display and the display backlight will blink. Normal operation will resume once the fault condition has been corrected.

  • Page 18: Temperature And / Or Relative Humidity Offset

    4.7 Setting Channel Alarm Setpoints, Direction and Hysteresis The cGas-SC can be configured with 3 gas alarm setpoints. LOW, MID and HIGH are names we use to describe the alarm setpoints but each one can be set to any level. The number...
  • Page 19 100 ppm and the hysteresis is 5 ppm, when the gas concentration reaches or exceeds 100 ppm, the cGas-SC will display an alarm condition. The alarm condition will remain displayed until the gas concentration reduces to 95 ppm (5 ppm below the alarm setpoint).

  • Page 20: Enable / Disable Alarm Blink

    - Operation Manual Rev. F | 2024.03 Selected Channel Navigate to the Selected Alarm menu item and confirm the correct alarm level is showing or choose a different alarm level (ie. Mid or High). Selected Alarm Selected Alarm Low Alarm >Mid Alarm...

  • Page 21: Enable / Disable Channels

    Rev. F | 2024.03 cGas-SC - Operation Manual Selected Alarm Selected Alarm Low Alarm >High Alarm Navigate to Alarm Blink menu item and press OK. Change value to Enabled and press OK. Alarm Blink Alarm Blink >Disabled >Enabled Repeat for each channel and each alarm as required.

  • Page 22: Relays, Buzzer And Strobe Settings

    4.11 Relays, Buzzer and Strobe Settings The cGas-SC has two dry contact relays that are designed to operate fan starters or coils to control equipment that draws no more than 5 amps @ 240 V start-up and / or operational current.

  • Page 23: Enable / Disable Relays, Buzzer And /Or Strobe

    Pressing the OK button will stop sounding the buzzer or any external audible device the cGas-SC is connected to for 2 minutes, the factory default set amount of time. If a different set amount of time is required, this needs to be specified at the time of order.

  • Page 24: Set Relay On / Off Delays

    Repeat for whichever Relay 1, Relay 2, Buzzer or Strobe you want to disable. 4.11.2 Set Relay ON / OFF Delays The cGas-SC Self Contained Controller has configurable ON and OFF delay for its relays, internal buzzer and side mounted strobe. The relay timers functionality offer a high degree of flexibility, allowing for many variations in settings for turning on and off relay triggered events such as fans and/or signaling a Building Automation System.
  • Page 25 Rev. F | 2024.03 cGas-SC - Operation Manual 1, Relay 2 and the strobe is a 10 second ON Delay and a 10 second OFF Delay. The default setting from the factory for the buzzer is 0 seconds, indicating no ON or OFF Delays are set.

  • Page 26: Relay Mode Of Operation

    The factory defaults can be changed if needed. 4.12.1 Failsafe / Normal The cGas-SC is designed to be failsafe whereby the relay is normally energized in a non- alarm state for failsafe operation. If required, the failsafe operation can be disabled and the relay will be energized in an alarm state.

  • Page 27: Latching / Not Latching

    DDC/BAS. You can do the same for relative humidity and temperature if the -RHT option is installed.

  • Page 28: Test Analog Output

    The test will start as soon as you press OK to confirm. To stop the test, press any button. 4.13.2 Test Analog Output NOTE: This functionality is available only when Option -2AO is installed or the cGas-SC has 3 gas channels.

  • Page 29: Test Relays, Buzzer And/Or Strobe

    3 gas channels installed. 3 channel models inherently have 1 analog output and cannot have Option -2AO. The factory default analog output for the cGas-SC is 4-20 mA. The analog output can be changed to voltage in the field.
  • Page 30 All 3 channel cGas-SC models come with 1 analog output. It is located on the remote sensor daughter board in the middle of the main board. The factory default is 4 - 20 mA. The analog output can be changed to voltage in the field using the jumpers on jumper bank 3.

  • Page 31: Set The Analog Output Type

    Refer to Section 5.1.2 Set the Analog Output Range. 5.1.2 Set the Analog Output Range The factory default analog output for the cGas-SC is 4-20 mA. The default voltage output value is 0-10 volts. The output range can be changed, for example to 0-20 mA or 2-10 volts.

  • Page 32: Set The Analog Output Mode

    NOTE: If the analog output mode is OFF, the cGas-SC is still detecting gas and will display readings BUT it will not be sending an analog signal back to the controller.

  • Page 33: Calibrating The Analog Output

    5.2 Calibrating the Analog Output (requires a 4-20 mA meter) NOTE: The analog output is calibrated at the factory prior to shipping and should not require re-calibration in the field. Only cGas-SC models with Option -2AO installed or with 3 remote sensors can have analog output.

  • Page 34: Modbus And Bacnet Configuration

    Rev. F | 2024.03 6 MODBUS® & BACNET® CONFIGURATION The cGas-SC can be changed from Modbus® to BACnet® or vice versa in the field. 6.1 Changing Digital Communication Type in the Field When the communication type is changed from/to Modbus® or BACnet®, the device will reset.

  • Page 35: Change Modbus® Mac Address

    Rev. F | 2024.03 cGas-SC - Operation Manual 6.2.1 Change Modbus® MAC Address All devices on the same network must have a unique Modbus® ID. The range of numbers that can be used as a Modbus® MAC address is 001 to 247.

  • Page 36: Modbus® Holding Registers

    The factory set default BACnet® MAC address is 100. The MAC ID along with the Instance ID make up the complete ID for the device. Each device requires a unique ID in order to communicate with the BAS / DDC. A MAC address should be set for each cGas-SC Self Contained Controller during installation.

  • Page 37: Change Bacnet® Baud Rate

    Rev. F | 2024.03 cGas-SC - Operation Manual Enter Passcode 2019 Navigate to the Communications parent menu and press OK. Choose Menu >Communications Navigate to the Comm Type menu item and confirm that it is showing BACnet. Comm Type BACnet Navigate to the Instance ID menu item.

  • Page 38: Bacnet® Pics Information

    Rev. F | 2024.03 6.3.4 BACnet® PICS Information Critical Environment Technologies Canada Inc. (CETCI) has been granted the BACnet® Testing Laboratories (BTL) certification for the CGAS Product Line upon passing the BTL requirements for the BACnet® Smart Actuator (B-SA) designation.

  • Page 39: Set Number Of Required Channels

    & fault flags to never trip. 7.3 Set Analog Output(s) Priority Depending on the model, the cGas-SC could have none, 1 or 2 analog outputs. If 1 or more analog outputs are installed, this setting enables you to assign 1 priority to each. Each AO can be assigned to the same or to different priorities.

  • Page 40: Set Relays, Buzzer And Strobe Priority

    - Operation Manual Rev. F | 2024.03 Enter Passcode 2019 Navigate to the Analog Outputs parent menu and then to the Pick AO menu item and press Choose Menu >Analog Outputs Choose the analog output you would like to assign a priority to and press OK.

  • Page 41: Plug & Play Smart Sensor Replacement

    Rev. F | 2024.03 cGas-SC - Operation Manual Selected Relay Selected Relay Relay 1 >Buzzer Selected Relay Selected Relay Relay 1 >Strobe Navigate to the Relay Priority menu item and press OK. Relay Priority 1# ### ## ### ## Choose the priority the relay will respond to: •...

  • Page 42: How To Add A New Smart Sensor Board

    • Add a second gas channel to a device in the field • Add smart sensor board(s) to a sensorless stock order that has been installed NOTE: You cannot add a 3 channel to a cGas-SC in the field that does not already have an existing 3rd channel.

  • Page 43: Read From Sensor

    Rev. F | 2024.03 cGas-SC - Operation Manual When installing a second smart sensor after initially ordering a single smart sensor model, you will need to remove the center circular cut out of the foam in the second sensor vent area before installing the smart board.

  • Page 44: Calibration

    - Operation Manual Rev. F | 2024.03 Enter passcode 2019 and press the OK button. Enter Passcode 2019 Navigate to the Configuration parent menu and then to the Selected Channel menu item and press OK. Choose Menu Selected Channel >Configuration...

  • Page 45: Regulators & Flow

    Rev. F | 2024.03 cGas-SC - Operation Manual IMPORTANT NOTES: • Oxygen sensors require 99.9% nitrogen (N2) for a true zero. We recommend doing the span first, followed by zeroing. • Ethylene Oxide should be zeroed on site if the ambient temperature is above 22°C (71.6°F).

  • Page 46: Gas Testing Frequency (Bump Testing)

    NOTE: A dual channel cGas-SC with internal CO + NO sensors that requires a splash guard should be ordered with the special splash guard for sticky gases.

  • Page 47: Zero (Null) Calibration

    Rev. F | 2024.03 cGas-SC - Operation Manual Enter passcode 2020 and press the OK button. Enter Passcode 2020 Navigate to the Calibration parent menu and then to the Selected Channel menu item and press OK. Choose Menu Selected Channel >Calibration...

  • Page 48: Span Calibration

    - Operation Manual Rev. F | 2024.03 Zero Success 56 AD When the process has finished and the Zero calibration was accepted remove the cylinder of zero gas. If the Zero calibration was not successful refer to Section 9.3.2 Zero Fault.

  • Page 49: Troubleshooting Calibration

    Rev. F | 2024.03 cGas-SC - Operation Manual NOTE: If an inappropriate concentration of span gas is applied during calibration, calibration may succeed but it does not mean the equipment has been calibrated properly. CETCI is not responsible for improperly calibrated transmitters. Follow manual instructions carefully.

  • Page 50: Span Override

    - Operation Manual Rev. F | 2024.03 9.3.5 Span Override During the Span calibration, readings are taken and from the results sensitivity is calculated and compared to the original sensitivity of the sensor at the time of installation. If this sensitivity is below the override range, but above the fault limit, the display will indicate that an override is required.
  • Page 51 Rev. F | 2024.03 cGas-SC - Operation Manual     NUMBER FEATURE FUNCTION Used for Zero calibration of a new or replacement POT RN1 sensor. TP1 and TP2 calibrate to 0.40 VDC with  (Potentiometer) Null gas applied.

  • Page 52: Calibrating An Internal Oxygen Sensor

    - Operation Manual Rev. F | 2024.03 instructions in Section 6.2 Calibrating the Internal Sensor(s) with the exception of applying the gas to the ESH-A sensor opening instead of the CGAS sensor opening. 9.5 Calibrating an Internal Oxygen Sensor When calibrating an Oxygen sensor, a Span calibration should be done first, then a Zero calibration.

  • Page 53: Options & Accessories

    Rev. F | 2024.03 cGas-SC - Operation Manual Span Success 1956 AD 19 When the process has finished and the Span calibration was accepted, remove the cylinder of span gas. Refer to Section 9.3.5 Span Override if the Span calibration was not successful.

  • Page 54: Calibration Kit

    Canada to other countries, including the USA. 10.4 Side Mounted Strobe with Audible (Option -L2) Red flashing beacon with audible, factory installed on the side of the cGas-SC enclosure. Offers 80 flashes per minute and a siren volume of 85 dB.

  • Page 55: Trouble Shooting

    Device cannot be seen by the Controller and/or the BAS / DDC on the Modbus® network. This fault should be accompanied by a COMM Fault on the display. If it is not displayed it means the cGas-SC is seeing and responding to communication and the issue maybe on on the Controller’s side.
  • Page 56 (left) if a single channel Smart Board Faults unit. If a power cycle does not resolve this, replace the sensor smart board. cGas-SC detected an error in the smart board ID. Error in reading Smart Use “Write to Sensor” for the indicated channel Board (passcode 2019, Configuration menu).
  • Page 57 Department. This is a daughter board hardware failure. Contact ADC COMM our Technical Support Department. The cGas-SC has detected a critical memory failure of the main board. This can be corrected Internal Memory F80-99 by bootloading a valid configuration onto the Faults unit.
  • Page 58 - Operation Manual Rev. F | 2024.03 NOTES © 2024 All rights reserved. Data subject to change without notice.
  • Page 59 Rev. F | 2024.03 cGas-SC - Operation Manual NOTES © 2024 All rights reserved. Data subject to change without notice.
  • Page 60 SAFER AIR EVERYWHERE. www.critical-environment.com CGASSC20240311 Critical Environment Technologies Unit 145, 7391 Vantage Way, Delta, BC V4G 1M3 Canada Tel: +1.604.940.8741 Toll Free: +1.877.940.8741 © 2024 All rights reserved. Data subject to change without notice.

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