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Critical Environment Technologies CGAS-A Series Installation & Operation Manual

Co2 detector analog transmitter
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Installation & Operation Manual
Rev. B | 2020.22
CGAS-A CO
Detector
2
Analog Transmitter
www.critical-environment.com

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Summary of Contents for Critical Environment Technologies CGAS-A Series

  • Page 1 Installation & Operation Manual Rev. B | 2020.22 CGAS-A CO Detector Analog Transmitter www.critical-environment.com...

  • Page 2: Table Of Contents

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 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 ....................
  • Page 3 Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual 6.4.2 EMI and RF Interference Considerations ........19 6.4.3 Mounting Height................20 6.5 Enclosure Mounting Components ............20 6.5.1 Enclosure Base ................20 6.5.2 Enclosure Bottom ................21 6.6 Wiring Connections ................21 6.6.1 Analog Wire Gauge vs Run Length ..........
  • Page 4 cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 9.1.2 Regulators & Flow ................41 9.1.3 Adapters ................... 41 9.1.4 Calibration Frequency ..............41 9.1.5 Gas Testing Frequency (Bump Testing) ........42 9.2 Calibrating the Internal Sensor ............42 9.2.1 Set Calibration Gas Value ..............

  • Page 5: Policies

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation 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. This product must be installed by a qualified electrician or factory trained technician and according to instructions indicated in this manual.

  • Page 6: Warranty Policy

    The product 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.

  • Page 7: Copyrights

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual may contact the distributor from whom it was purchased or you may contact CETCI directly. Prior to shipping equipment to CETCI, contact our office for an RMA #. All returned goods, regardless of reason, must be accompanied with an RMA number.

  • Page 8: Revisions

    Should you detect any error or omission in this manual, or should you want to inquire regarding upgrading the device’s firmware, please contact CETCI at the following address: Critical Environment Technologies Canada Inc. Unit 145, 7391 Vantage Way, Delta, BC, V4G 1M3, Canada Toll Free: +1.877.940.8741...

  • Page 9: Introduction

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual 2 INTRODUCTION 2.1 General Description Thank you for purchasing our cGas Detector Analog Transmitter, a single channel CO gas detection designed for use in non-explosion rated, commercial applications that require continuous monitoring of Carbon dioxide. It offers one 4-20 mA analog output and is ideal for applications where compressed CO used and stored, climate control in commercial buildings and other processes requiring the continuous monitoring of CO...

  • Page 10: Instrument Specifications

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 If after reading through the manual, you have any questions, please do not hesitate to contact our service department for technical support. 3 INSTRUMENT SPECIFICATIONS 3.1 Technical Specifications MECHANICAL ABS / Polycarbonate, IP54 rating with splash guard Enclosure installed.
  • Page 11 Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual ELECTRICAL 16 - 30 VDC, 3 W, Class 2 12 - 27 VAC, 50-60 Hz, 3 VA, Class 2 Power Requirement 24V recommended. Refer to Section 6.6 Wiring Connections 24 VDC or 24 VAC (ground referenced) 3-conductor Wiring shielded 18 AWG (or larger) stranded within conduit...
  • Page 12 cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 CERTIFICATION Model: CGAS-A-XXX S/N: CGASA1807B00010 Rating: 16-30 VDC, 3W, Class 2 12-27 VAC, 50-60 Hz, 3VA, Class 2 CERTIFIED FOR ELECTRIC SHOCK & ELECTRICAL FIRE HAZARD ONLY. LA CERTIFICATION ACNOR COUVRE UNIQUEMENT LES RISQUES DE CHOC ELECTRIQUE ET D’INCENDIE D’ORIGINE ELECTRIQUE.

  • Page 13: Enclosure Dimensions

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual 3.2 Enclosure Dimensions 4 SENSOR SPECIFICATIONS 4.1 Available Internal Gas Sensors Infrared Sensors Part Numbers Range Lifespan 0 - 5,000 CGAS-A-CO2-5K Carbon Dioxide ~ 8 years CGAS-A-CO2-5% 0 - 5% vol ©...

  • Page 14: Optional Rh & Temperature Sensor (Option -Rht)

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 4.2 RH & Temperature Sensor (Option -RHT) The CGAS-A is a single channel device, it has one analog output. Therefore, if it has an internal gas sensor and a relative humidity and temperature sensor, the analog output signal be used to send the gas reading signal to a controller or BAS/DDC.

  • Page 15: Interior System Layout

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual Allows gas diffusion into sensor Sensor Opening  Door Screw Secures door shut  Lock Slot For security padlock or tie  5.2 Interior System Layout    ...

  • Page 16: Installation

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 Sockets for smart The CO sensor board plugs into the main  sensor board board using these sockets 6 INSTALLATION The CO sensor in the cGas Detector goes through a burn in period at our factory prior to shipping so it is ready for operation upon arrival.

  • Page 17: General Safety Warnings

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual 6.1 General Safety Warnings The cGas Detector is intended for indoor use, permanently mounted at a height that is appropriate for the type of gas being monitored. Refer to Section 6.4 Mounting the Transmitter.

  • Page 18: Mounting The Transmitter

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 and caution must be exercised when removing the door to avoid damaging the hinges. The door should only be removed when absolutely required. Any damage occurring from door removal procedure will not be covered under warranty.

  • Page 19: Wet Environment Considerations

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual bottom edge of the base. Refer to Section 6.5 Enclosure Mounting Components. The clearance from the PCA to the base enclosure is 12.7 mm / ½ in. Do not use a conduit connector that has more than 12.7 mm (½...

  • Page 20: Mounting Height

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 3. Inform operators and technical staff working in the surrounding area to be aware of these possible conditions and that two way radios, Bluetooth enabled devices, cell phones and other electrical equipment may interfere with the response of the gas detectors.

  • Page 21: Enclosure Bottom

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual NUMBER FEATURE Door Hinge  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 6.5.2 Enclosure Bottom ...
  • Page 22 cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 Signal output and supply should be in shielded cable. The cable shield should be connected to earth ground at the controller/power supply that is providing power for the cGas. If the cGas Detector is being connected to either a QCC or FCS the supply voltage will either be supplied by the QCC or FCS and any additional power requirements of the system will be supplied by RPS-24VDC Remote Power...

  • Page 23: Analog Wire Gauge Vs Run Length

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual VDC or 12 VAC. NOTE: WARRANTY VOID IF SOLID-CORE WIRE IS USED AT THE WIRING TERMINAL STRIP. When using solid core wiring for distribution (in the conduit), use stranded wire pigtails 18 AWG within the enclosure to connect to the circuit board.

  • Page 24: System Operation

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 5,600 316 (assume a 12 VAC 200 Ω termination 8,900 resistor) 13,583 NOTE: The termination resistor could be as high as 500 Ω (10 volt measurement at 20 mA). A poor quality 24 VAC transformer might supply as little as 14 volts at low line conditions.

  • Page 25: Navigating The Menu Structure

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual was last powered up, and the state of the environment it is installed in. 7.2 Navigating the Menu Structure The three programming push-buttons inside the enclosure are used to navigate through the cGas Detector menu structure.
  • Page 26 cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 CODE NAME DESCRIPTION 0001 Test Menu • Test Analog Output • Display Type • Brightness 1014 Display Menu • Selected Channel • Hide Channel • Selected Channel • Selected Alarm Level •...

  • Page 27: Display Settings

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual 7.4 Display Settings The LCD display can display up to 2 lines of 16 characters. The backlight can be turned off, but in normal operation, as configured from the factory, the display is backlit.

  • Page 28: Display Information - Normal Or Minimal

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 7.4.2 Display Information - Normal or Minimal The default display set from the factory is normal mode which displays the gas type, gas reading and gas units for CH1. 536 PPM The information can be reduced to just the gas type by changing the setting to the minimal mode display.

  • Page 29: Alarm Status, Fault Detection And Communication Failure Alerts

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual Press ENTER. Press the UP button until you see Selected Channel. Selected Channel >CO Press ENTER. Using the UP or DOWN buttons, scroll through the item you want to apply changes to: •...

  • Page 30: Enable / Disable Channels

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 NOTE: If a question mark ? is displayed then the system is in a minor fault and a re-zeroing is recommended. For a list of Fault Codes, refer to Section 12 Troubleshooting.

  • Page 31: Setting Channel Alarm Setpoints, Direction And Hysteresis

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual If you want to choose a different channel, press ENTER and use the UP button to scroll to the next value. Press ENTER and continue. Selected Channel >Temperature The list to choose from will depend on the configuration of the device: •...
  • Page 32 cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 Ascending alarm is used when monitoring a gas that becomes hazardous in increasing quantity. The normal/safe gas level is below the alarm setpoint and when the gas level increases, reaching and exceeding the alarm setpoint, the alarm is tripped.
  • Page 33 Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual Alarms Menu Press Enter In the Selected Channel menu, confirm the correct channel is showing. Selected Channel Press the UP button until you see Selected Alarm, confirm the correct alarm level is showing.

  • Page 34: Change Units (Oc Or Of) Of Temperature Readings

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 to change the value. Press ENTER to confirm and continue. Alarm Hysteresis Confirm? >010 PPM CO2 >10 PPM >Y 7.8 Change Units (oC or oF) of Temperature Readings NOTE: This menu item only applies if the cGas Detector has the -RHT option installed.

  • Page 35: Temperature And/Or Relative Humidity Offset

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual 7.9 Temperature and/or Relative Humidity Offset NOTE: This menu item only applies if the cGas Detector has the -RHT option installed. NOTE: Depending on the configuration, the device will show the temperature in either Celsius or Fahrenheit.

  • Page 36: Set Analog Output Mode

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 Temperature Adj Humidity Adj >-4.0 degC >+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 ENTER and reenter the value.

  • Page 37: Test Analog Output

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual When finished pressed ENTER and then ENTER again to exit. 7.11 Test Analog Output Testing the analog output allows you to determine if the installation was successful. The test forces the cGas Detector to output a predetermined signal to the controller or DDC/BAS to test that the correct signal is being transmitted and the controller responds as configured (ie.

  • Page 38: Plug & Play Smart Sensor Replacement

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 8 PLUG & PLAY SMART SENSOR REPLACEMENT A sensor will need to be replaced when it does not have enough sensitivity to respond to a bump test or it repeatedly fails calibration. Similarly, the sensor may need to be replaced if the application requirements change and a different gas needs to be monitored.

  • Page 39: Read From Sensor

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual 8.2 Read from Sensor During this process, the main board reads from the smart sensor board and uploads the calibration and configuration information stored in the smart sensor board, saving the information and overwriting the existing calibration and configuration information for that sensor in the main board.

  • Page 40: Calibration

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 From the main display, press ENTER. Enter passcode 3022 using the UP button and ENTER buttons. Enter Password 3022 Press ENTER to access the Config Menu. Config Menu Press Enter In the Selected Channel menu, confirm the desired channel is showing.

  • Page 41: Regulators & Flow

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual Same when flowing CO calibration gas, flow for 4 minutes BEFORE you enter the Calibrate Span menu. 9.1.2 Regulators & Flow and N calibration gases should be flowed at 0.5 LPM. Fixed flow regulators provide more accuracy.

  • Page 42: Gas Testing Frequency (Bump Testing)

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 9.1.5 Gas Testing Frequency (Bump Testing) For the purpose of safety in OHS applications, sensors should be gas tested (bump tested) once every month to confirm response and alarm activation. 9.2 Calibrating the Internal Sensor(s) Calibration has three processes - Set Calibration Gas Value, Span and Zero.

  • Page 43: Zero (Null) Calibration

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual The factory default calibration gas concentrations are: GAS TYPE RANGE CALIBRATION GAS LEVEL Carbon Dioxide (CO 0 - 5,000 ppm 1,000 PPM Carbon Dioxide (CO 0 - 5% vol 1.0 % VOL * subject to change when required 9.2.2 Zero (Null) Calibration...

  • Page 44: Span Calibration

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 Zero Success 56AD When the process has finished and the Zero calibration was accepted, press ENTER and use the UP button navigate to Exit and press ENTER to exit. Remove the cylinder of gas.

  • Page 45: Troubleshooting Zero And Span Calibration

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual Confirm CalGas >1000 PPM >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.

  • Page 46: Calibration Adapter Plug Doesn't Fit

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 questions, please contact our Technical Service Department at help@cetci. com or 604-940-8741 (Local) or 1877-940-8741 (Toll Free). 9.3.1 Calibration Adapter Plug Doesn’t Fit Use a slight twisting motion as you gently push the calibration adapter plug (p/n: CET-7000-CAP) into the sensor opening.

  • Page 47: Zero Override

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual 9.3.4 Zero Override If the gas level (possible residual gas) is too high, but still within the override range, the display will indicate that an override is required. Override? -1PPM >Y To override the value use the UP button to select Y and press ENTER.

  • Page 48: Set Analog Output Zero / Set Analog Output Range

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 Follow the same steps - first for calibrating the zero output (Cal AO 4.0 mA) and then the range output (Cal AO 20.0 mA). From the main display, press ENTER. Enter passcode 3032 using the UP button and ENTER button.

  • Page 49: Accessories

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual NOTE: If you change the analog output zero and range values, you MUST recalibrate the analog output. Refer to Section 9.4 Calibrating the Analog Output. 10 ACCESSORIES 10.1 Splash Guard (Option -S) The splash guard attaches to the front of the enclosure to protect the sensor during water spray or washdown applications.

  • Page 50: Metal Protective Guard

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 gas readings will not be accurate. 10.3 Metal Protective Guard (p/n: SCS-8000-RSG) The metal protective guard (p/n: SCS-8000-RSG) is made of heavy gauge, galvanized metal and helps protect against abrasive damage, theft and vandalism to the transmitters.

  • Page 51: Maintenance

    Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual The Calibration Kit and gases are available from the CETCI factory. Many gases, but not all are carried in inventory. Check with any CETCI authorized distributor for availability of specific gas types. NOTE: Gas cylinders cannot be shipped from Canada to other countries, including the USA.

  • Page 52: Trouble Shooting

    cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 It is important to ensure that excess water and/or dust is not somehow entering the enclosure and physically damaging the circuit board or internal components. 12 TROUBLE SHOOTING cGas Detector won’t power up. (blank display) Is the power properly connected? Check the wiring connections.
  • Page 53 Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual List of Possible cGas Error Codes: (appears on the display in place of the units for a channel) CODE DESCRIPTION Check to make sure the smart sensor board is present and installed properly in the socket. If installed, the cGas detects the sensor signal Negative Fault is too far below its zeroAD.
  • Page 54 cGas Detector Analog Transmitter - Operation Manual Rev. B | 2020.07 cGas cannot communicate with the sensor. Ensure the smart board is installed correctly. RH & Temp Fault If unresolved, contact our Technical Support Department Indicates a hardware failure in the analog AO DAC is not output circuit.
  • Page 55 Rev. B | 2020.07 cGas Detector Analog Transmitter - Operation Manual NOTES © 2020 All rights reserved. Data subject to change without notice.
  • Page 56 CGAS-A-2020722-Rev-B Unit 145, 7391 Vantage Way, Delta, BC V4G 1M3 Canada Tel: +1.604.940.8741 Toll Free: +1.877.940.8741 www.critical-environment.com © 2020 All rights reserved. Data subject to change without notice.

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Cgas-a-co2-5kCgas-a-co2-5

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