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Critical Environment Technologies ESH-A Operation Manual

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Operation Manual
Rev. B | 2024.11
ESH-A Remote Sensor
www.critical-environment.com

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Summary of Contents for Critical Environment Technologies ESH-A

  • Page 1 Operation Manual Rev. B | 2024.11 ESH-A Remote Sensor www.critical-environment.com...

  • Page 2: Table Of Contents

    3.3 Standard Enclosure Dimensions ..............14 3.4 Exterior Enclosure ..................15 3.5 Interior System Layout ................. 16 3.6 List of Available ESH-A Remote Sensors ..........17 3.7 Factors Affecting Lifespan and Performance of Sensors..... 18 3.7.1 Catalytic Bead Sensors ..............18 3.7.2 PID Sensors ..................
  • Page 3 Rev. B | 2024.11 ESH-A - Operation Manual 4.2.2 EMI and RF Interference Considerations ........21 4.2.3 Mounting Heights (sensor and application dependent) ..22 4.3 Enclosure Mounting Components ............. 23 4.3.1 Enclosure Base ................23 4.3.2 Enclosure Bottom ................24 4.4 Wiring Connections ..................

  • Page 4: Policies

    ESH-A - Operation Manual Rev. B | 2024.11 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 5: 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 6: Copyrights

    ESH-A - Operation Manual Rev. B | 2024.11 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 7: Revisions

    Rev. B | 2024.11 ESH-A - Operation Manual 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 no warranty or representation, expressed or implied, including any warranty of merchantability or fitness for purpose, with respect to this manual.

  • Page 8: Safety Information

    • RoHS compliant circuit boards 2.1 General Safety Warnings The ESH-A Remote Sensor is intended for indoor use, permanently mounted at a height that is appropriate for the type of gas being monitored. Refer to Section 4.2.3 Sensor Mounting Heights. The ESH-A Remote Sensor should be protected from extreme weather conditions.

  • Page 9: Protection Against Electrical Risks

    The power supply may have a building installed circuit breaker / switch that is suitably located and easy to access when servicing is required and should be labelled as ESH-A Remote Sensor supply (disconnecting power to the ESH-A). Appropriate markings should be visible at the circuit breaker / switch that is supplying power to the ESH-A.

  • Page 10: Instrument Specifications

    100 ohm load or a voltage signal of 0.40 to 2 volts. Each ESH-A is given the same serial number as the device it is being connected to. Make sure to connect the ESH-A to the controller or transmitter that has the same serial number or the system won’t work and the factory calibration will...

  • Page 11: Technical Specifications

    An optional splash guard may be installed to further protect the remote sensor in water spray or wash down applications. All ESH-A Remote Sensors operate by diffusion. The sensors utilized in this device are accurate enough to measure to Occupational Health & Safety (OHS) hazardous levels for toxic gases.
  • Page 12 ESH-A - Operation Manual Rev. B | 2024.11 ELECTRICAL Power Requirement 12 - 24 VDC, 1W, Class 2 Outputs current or voltage VDC four conductor shielded 14 - 18 awg (or larger) Wiring stranded within conduit (refer to Section 4.4.1 Wire Gauge vs.
  • Page 13 Rev. B | 2024.11 ESH-A - Operation Manual CERTIFICATION Model: ESH-A-XXXX S/N: same serial# as controller or transmitter connected to Rating: 12 - 30 VDC, 1W, 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 14: Standard Enclosure Dimensions

    ESH-A - Operation Manual Rev. B | 2024.11 3.3 Standard Enclosure Dimensions Above dimensions are shown with optional splash guard. Without splash guard, thickness is 53.34 mm (2.1”). The area required for enclosure door to be open 90 degrees is 155.7 mm (6.13”) or 243.84 mm (9.6”) for fully open. With the splash guard, the enclosure has an IP54 rating.

  • Page 15: Exterior Enclosure

    Rev. B | 2024.11 ESH-A - Operation Manual 3.4 Exterior Enclosure       NUMBER FEATURE FUNCTION Door Hinge Secures door  Indicates sensor gas type  Gas Type Door Screw Secures door  Sensor Opening Allows gas diffusion into ...

  • Page 16: Interior System Layout

    ESH-A - Operation Manual Rev. B | 2024.11 3.5 Interior System Layout      NUMBER FEATURE FUNCTION V+ is the 12 - 24 VDC power supply TMP/Temp is for the temperature signal output to the controller/ ...

  • Page 17: List Of Available Esh-A Remote Sensors

    JP1-2 and JP1-3 are used to set the Pin 3 - external current output connection 3.6 List of Available ESH-A Remote Sensors ESH-A Remote Sensors - Combustible Catalytic Bead Acetylene (C ESH-A- 0 - 100% LEL ~5 years...

  • Page 18: Factors Affecting Lifespan And Performance Of Sensors

    ESH-A - Operation Manual Rev. B | 2024.11 ESH-A Remote Sensors - Infrared Propane (C ESH-A-JET 0 - 100% LEL ~8 years 3.7 Factors Affecting Lifespan and Performance of Sensors Sensors have an operational life expectancy, a shelf life for storage and a recommended calibration frequency that is commonly dependent on the type of sensor, type of application and particular environment.

  • Page 19: Pid Sensors

    Rev. B | 2024.11 ESH-A - Operation Manual and in most cases a sensor will 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 20: Installation

    ESH-A - Operation Manual Rev. B | 2024.11 4 INSTALLATION The ESH-A is not a standalone sensor, it must be connected to a CET Self Contained Controller or Transmitter. NOTE: The ESH-A is not designed to connect directly to the FCS System Controller.

  • Page 21: Wet Environment Considerations

    Rev. B | 2024.11 ESH-A - Operation Manual Care should be taken to ensure that the face of the ESH-A is not obstructed in order to maximize the sensor’s exposure to the environment being monitored. Do not mount the device upside down, sideways or flat on the floor or other surface.

  • Page 22: Mounting Heights (Sensor And Application Dependent)

    4.2.3 Mounting Heights (sensor and application dependent) The ESH-A needs to be mounted where it will best detect the target gas. Some applications may require some adjustments, but generally speaking, the mounting height will depend on the density of the target gas relative to air.

  • Page 23: Enclosure Mounting Components

    Rev. B | 2024.11 ESH-A - Operation Manual Hydrogen (H on or near the 5000 (combustible) ceiling Methane (CH on or near the 5000 (combustible) ceiling 6 in (15 cm) from 3000 Propane (C (combustible) floor target gas 3000 TVOCs (PID)

  • Page 24: Enclosure Bottom

    IMPORTANT: Each ESH-A is given the same serial number as the device it is being connected to. Make sure to connect the ESH-A to the controller or transmitter that has the same serial number or the system won't work and the factory calibration will be void.
  • Page 25 The ESH-A Remote Sensor must be used with appropriately rated equipment. External 12 - 24 VDC power to the ESH-A is supplied by the controller or transmitter it is connected to. All wiring should be run within properly grounded (earth or safety) conduit.

  • Page 26: Wire Gauge Vs Run Length By Cet Device

    ESH-A - Operation Manual Rev. B | 2024.11 Refer to the Installation Manual of the self contained controller or transmitter you are connecting the ESH-A Remote Sensor to for specific wiring instructions. 4.4.1 Wire Gauge vs Run Length by CET Device...

  • Page 27: System Operation

    61 m / 200 ft Controller 5 SYSTEM OPERATION The ESH-A is not a standalone sensor, it must be connected to a CET self contained controller or transmitter. NOTE: The ESH-A is not designed to connect directly to the FCS System Controller.

  • Page 28: Fault Detection

    5.1 Fault Detection In the event of a problem with the measurement circuitry or dead or damaged sensor, the signal between the ESH-A Remote Sensor and the controller or transmitter may drop and the controller/transmitter may indicate a fault condition on the display (if equipped with one) or via the Fault LED. Normal operation will resume once the fault condition has been rectified.

  • Page 29: Regulators & Flow

    “air” balance, not N balance. • The catalytic sensors in the ESH-A Remote Sensor need to be calibrated using a humidification chamber. Flowing dry gas over these sensors can result in a negative a reaction and inaccurate readings.

  • Page 30: Calibration Frequency

    ESH-A - Operation Manual Rev. B | 2024.11 All ESH-A catalytic sensor models should be calibrated with a humdification chamber including: • ESH-A-CCH4-100 • ESH-A-CC3H8-100 • ESH-A-CC2H2-100 • ESH-A-CH2-100, etc. NOTE: Other types of sensors that require the use of a humidification chamber include solid state refrigerants and solid state TVOCs.

  • Page 31: Zero Calibration Of An Installed, Responsive Sensor

    Follow the instructions in the Calibrating and ESH-A Remote Sensor section of the Operations Manual of the self contained controller or transmitter that the ESH-A is connected to, with the exception that the gas should be applied to the ESH-A sensor opening instead of the transmitter or controller’s sensor opening.
  • Page 32 ESH-A - Operation Manual Rev. B | 2024.11 Power up the ESH-A Remote Sensor and leave it on; the new sensor should be allowed to warm-up for a 24 hour period prior to calibration. The indicated features on the ESH-A are required for calibration.

  • Page 33: Accessories

    Step 3 Attach a voltmeter to TP1 and TP2. Using the POT RN1 potentiometer (located on the left underside of the ESH-A board), adjust the voltage to read 0.40 VDC. Step 4 Return the jumpers to their original positions and close the ESH-A.

  • Page 34: Metal Protective Guard

    7.0” W x 6.3” H x 3.6” D 7.3 Calibration Adapter Clip “Cal Clip” (p/n: CET-SGC) To calibrate an ESH-A with a factory installed splash guard (Option -S), attach the Cal Clip around the splash guard. The small barb hose fitting accommodates standard or Teflon tubing of 1/8”...

  • Page 35: Ss Refrigerant And Tvoc Calibration Kit

    The SS Refrigeration TVOC Calibration Kit contains a sensor extracting tool, a humidification chamber with sponge and an extra sponge. Use during calibration of catalytic sensors in the ESH-A, solid state refrigerant sensors and solid state TVOCs sensors. 7.5 Calibration Kit (p/n: CET-715A-CK1) The complete Calibration Kit contains all the items necessary for common field and shop calibrations.

  • Page 36: Maintenance

    ESH-A - Operation Manual Rev. B | 2024.11 8 MAINTENANCE Regular maintenance includes inspecting, cleaning if necessary, bump testing and calibration. Check the unit for wear and tear, tampering, accidental or deliberate damage; for cracks, water damage, loose screws or wires and make sure there isn’t a buildup of dust on the outside or inside of the enclosure.

  • Page 37: Trouble Shooting

    Check to make sure the ESH-A that is connected to the transmitter or self contained controller matches the serial number of said transmitter/controller. Each ESH-A is given the same serial number as the device it is being connected to. Make sure to connect the ESH-A to the self contained controller or transmitter that has the same serial number or the system won’t work properly.
  • Page 38 ESH-A - Operation Manual Rev. B | 2024.11 NOTES © 2024 All rights reserved. Data subject to change without notice.
  • Page 39 Rev. B | 2024.11 ESH-A - Operation Manual NOTES © 2024 All rights reserved. Data subject to change without notice.
  • Page 40 SAFER AIR EVERYWHERE. www.critical-enviroment.com ESH-A-20241120-B 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.

This manual is also suitable for:

Esh-a-cc2h2-100Esh-a-ch2-100Esh-a-ch4-100Esh-a-c3h8-100Esh-a-splEsh-a-sph