Summary of Contents for GDA E-Sense
- Page 1 Electrochemical Gas Detector Operating Manual Revision 2.1 © Copyright Gas Detection Australia 2025...
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Page 2: Table Of Contents
8.3.1 Perform Span Calibration 8.3.2 Failed Span Point Calibration 8.4 Test mA Output 9 Maintenance 9.1 User Maintenance 10 Specifications 10.1 General Specification 10.2 Mode Specifications 10.3 Specification GDA 1300 432 937 E-Sense Manual Rev 2.1 Page 2 of 25... - Page 3 11 Sensor Replacement 11.1 Replacement Sensor Element 11.2 Replacement Sensor Head Steps 12 Sensor Head Replacement GDA 1300 432 937 E-Sense Manual Rev 2.1 Page 3 of 25...
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Page 4: Proprietary
2 Warnings, Cautions and Notes For safety reasons, the E-Sense gas detector must be installed, operated, and serviced only by competent personnel. To avoid instrument damage please read the manual before operating or servicing this product. -
Page 5: Introduction
3.2 Product Identification The product name is GDA E-Sense Electrochemical Gas Detector. The serial number of the unit is located on the right side and on the inside of the enclosure. The target gas that the Detector is calibrated to is printed on the front lid label and on the serial number label. - Page 6 Gas characteristics, air flow, concentration of leaked gas, volume of room, etc. all contribute to the detectors ability to detect the target gas. GDA 1300 432 937 E-Sense Manual Rev 2.1 Page 6 of 25...
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Page 7: Installation
● Gases similar to air are to be installed in the Breathing Zone 1.0m to 1.8m from the ground. ● Heavier gases fall, install detector 300 mm from ground Below shows allowable mounting orientations for the GDA 2500 depending on the target gas. Note the IP rating is only maintained in the normal orientation. -
Page 8: Wiring Instructions
The sensor is a two-wire loop-powered 4-20 mA device. The sensor is designed to work with 24 V from a regulated power supply. The sensor transmitter is wired to the GDA range of control units with a 2 core cable with an overall screen/shield or a 3 core 18 AWG cable. -
Page 9: Electrical Connections
Shielded cables are required to be used for sensors to reduce RFI and EMI pickup along the cable which may be up to 1 km away. Installing unshielded cables will VOID WARRANTY. The figure below shows how to connect a 2700 detector in 2-wire or 3-wire mode to the GDA controller. Cable Shield connections. - Page 10 0 - 2 V 0.4 - 2 V 250 Ω 0 - 5 V 1 - 5 V 500 Ω 0 - 10 V 2 - 10 V Load Resistor wiring. GDA 1300 432 937 E-Sense Manual Rev 2.1 Page 10 of 25...
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Page 11: Verification Of Installation
6 Verification of Installation The Verification of Installation procedure is performed after the E-Sense detector has been installed and electrically connected. Ensure that the power to the detector(s) is switched off at the controller. ● Visually check that the mechanical mounting of the detector is correct as to details in this manual. -
Page 12: Commissioning
7 Commissioning Initial Commissioning It is necessary to commission your newly installed E-Sense detectors. Full system commissioning is not covered in this manual as every installation is different. Below is a recommended sequence of checks to ensure correct operation of the detector. -
Page 13: Function Checks
Regulator: 0.5 LPM Tube: Tygon E-3603 (Recommend) Gassing Cap: GC-ESENSE (Available from GDA) Multimeter: Multimeter with a milliamp DC range (Available from GDA) Recommended calibration gas concentrations and safe levels Chem. Formula Sensor Ranges 0-200 ppm 0-300 ppm 0-10 ppm 0-25% vol. -
Page 14: Fault Condition
The detector does not have a fault condition indicator light. A sensor fault will change the mA current output to below 2.0 mA. This will cause a fault condition on the controller. GDA 1300 432 937 E-Sense Manual Rev 2.1 Page 14 of 25... -
Page 15: Calibration Procedure
Calibration of your detector is required annually or sooner if it fails at your 6 monthly Bump Test. It is the recommendation from GDA that the detector has a bump test period in accordance with the building requirements of where it is installed. Electrochemical sensors have a limited life span and will require replacement. -
Page 16: Zero Point Calibration
● Adjust the Zero potentiometer (pot) until the multimeter reads 3.90 to 4.00 mA. For Oxygen 4.35 mA ● Turn off gas and remove the gassing cap. GDA 1300 432 937 E-Sense Manual Rev 2.1 Page 16 of 25... -
Page 17: Span Point Calibration
Refer to the table in section 7.2.1 for recommended calibration gas concentrations and safe levels for each E-Sense model. We will refer to this gas as Span gas. If your cylinder's concentration is not listed use the calculations below to determine the mA span set point for the value of your calibration cylinder. - Page 18 Ensure that the JP3 jumper is repositioned to its Normal Operating position after functional testing to ensure sensing operation. GDA 1300 432 937 E-Sense Manual Rev 2.1 Page 18 of 25...
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Page 19: Maintenance
9 Maintenance 9.1 User Maintenance It is the recommendation from GDA that the detector has a bump test period in accordance with the building requirements of where it is installed. It is required that the minimum bump test period is at a minimum of at least once every 6 months and a recalibration of the Zero and Span point annually with certified calibration gas. -
Page 20: Specifications
Output Modes 0 mA minimum used for voltage input equipment or 4 mA minimum used for current input equipment (industry standard) Mode select jumper 3 Wire GDA 1300 432 937 E-Sense Manual Rev 2.1 Page 20 of 25... -
Page 21: Specification
800 to 1200 Operating Pressure mbar mbar mbar mbar mbar mbar Gas density compared to Air Approx. Lighter Heavier Approx. Heavier Heavier (1.204 kg/m 1.165 0.717 1.880 1.331 1.434 2.279 GDA 1300 432 937 E-Sense Manual Rev 2.1 Page 21 of 25... -
Page 22: Sensor Replacement
Remove the lid of the enclosure (4 screws). 2. Disconnect the power connector (green 4 pin) located on the left of the main board. 3. Using a GDA spanner and a shifter remove the brass sensor head lid. 4. Gently wiggle out the old sensor element. -
Page 23: Replacement Sensor Head
Sensor Head to ensure a smooth bend of the cable. 10. Reconnect the power connector into the socket on the main board. 11. Calibration of Sensor Head is required. GDA 1300 432 937 E-Sense Manual Rev 2.1 Page 23 of 25... -
Page 24: Sensor Head Replacement
Updated styling of documentation 06 Feb, 2025 Revision of the 2700 Manual HW: V4.0 04 Apr, 2024 Initial revision of the 2700 Manual HW: V3.3 22 Dec, 2022 GDA 1300 432 937 E-Sense Manual Rev 2.1 Page 24 of 25... - Page 25 GDA 1300 432 937 E-Sense Manual Rev 2.1 Page 25 of 25...
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