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INFRARED GAS DETECTOR
Axiom Series Refrigerant Gas Detector
User Manual
Dynament is part of Process Sensing Technologies (PST)
As customer applications are outside of PST control, the information provided is given without legal responsibility. Customers
should test under their own conditions to ensure the equipment is suitable for the intended application(s). We adopt a continuous
development program which sometimes necessitates specification changes without notice. For technical assistance or enquiries
about other options, please contact us here:
sensors@processsensing.com
©2023 Process Sensing Technologies
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Summary of Contents for PST DYNAMENT Axiom Series
- Page 1 Dynament is part of Process Sensing Technologies (PST) As customer applications are outside of PST control, the information provided is given without legal responsibility. Customers should test under their own conditions to ensure the equipment is suitable for the intended application(s). We adopt a continuous development program which sometimes necessitates specification changes without notice.
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Page 2: Table Of Contents
Axiom A2L Leak Detector User Manual CONTENT SAFETY INFORMATION – READ FIRST ..........3 AXIOM A2L DETECTOR .................. 3 Description...................... 3 Power Supply....................3 Detector Mounting..................3 Detector warm-up..................4 Analogue output.................... 4 4-20mA MODE....................4 0-5V MODE ......................5 TECHNICAL SPECIFICATIONS .............. -
Page 3: Safety Information - Read First
Axiom A2L Leak Detector User Manual Safety Information – Read First Read and understand this manual in conjunction with the relevant data sheet before using the Axiom detector. When Axiom is employed to detect flammable gas, it is the customer’s responsibility to ensure the product is used safely in accordance with local regulations concerning explosive safety. -
Page 4: Detector Warm-Up
Axiom A2L Leak Detector User Manual Detector warm-up The detector takes approximately 45 seconds to warm up after power is supplied. The detector is held at -250% of the full-scale output during this time. In 4-20mA mode, the output will be forced to 2.5mA and the Open Collector Output will be active during this time. -
Page 5: 0-5V Mode
Axiom A2L Leak Detector User Manual 0.2-4.0V Mode The analogue output range is 0.2V to 4V for zero gas to FSD. The table below shows the analogue output for a detector that is configured in 0.2-4.0V mode. Gas Reading (% of detector range) Analogue output (V) 0.20 0.40... -
Page 6: Logic Levels
Axiom A2L Leak Detector User Manual Serial communications The detector has UART and RS485 interfaces, allowing communication with multiple devices in a serial manner. The serial interface allows the user to monitor gas levels, temperature, and other parameters. The communications protocol used is Modbus. Please consult the separate Modbus protocol user guide for full details. -
Page 7: Fault Indication
Axiom A2L Leak Detector User Manual Fault indication The analogue output is driven to the fault level when an internal fault is detected. Voltage output The 0.2-4.0V output will be driven to 0V in the event of a fault. 4-20mA The 4-20mA output will be driven to 2.5mA in the event of a fault. -
Page 8: Calibration
Axiom A2L Leak Detector User Manual Calibration Axiom A2L detectors do not require field calibration. Maintenance Dynament infrared detectors, like any other detectors, require regular maintenance in terms of inspection to prevent a build-up of dust or dirt or any other contamination that might prevent gas from entering the detector. -
Page 9: Appendix
Axiom A2L Leak Detector User Manual Appendix Wiring Guide Axiom can be factory configured in 4 different output modes: OPTION 1 OPTION 2 When a bare ended USB cable is used, the contacts follow the colour code below: Colour Axiom Contact 5-24V DC White Green... -
Page 10: 4-20Ma
Axiom A2L Leak Detector User Manual 4-20mA Connection Function 5.0 – 24V Input 4-20mA Output with fault indication (2.0mA = Fault) 100Ω recommended Load Resistor Open Collector Output Active Low 100mA maximum load 5.5V maximum voltage System 0V Recommended Output Circuit 4-20mA Open Collector TDS 0033... -
Page 11: 0-5V
Axiom A2L Leak Detector User Manual 0.2-4.0V Connection Function 5.0 – 24V Input 0.2-4.0V Output (0.1V minimum) Open Collector Output Active Low 100mA maximum load 5.5V maximum voltage System 0V Recommended Output Circuit 0.2-4.0V Open Collector TDS 0033 Issue 1.0 02/05/2024 Change Note: N/A Page 11 of 15... -
Page 12: Rs485
Axiom A2L Leak Detector User Manual RS485 Connection Function 5.0 – 24V Input RS485 A RS485 B System 0V Recommended Output Circuit TDS 0033 Issue 1.0 02/05/2024 Change Note: N/A Page 12 of 15... -
Page 13: Rs232 (Ttl)
Axiom A2L Leak Detector User Manual RS232 (TTL) Connection Function 5.0 – 24V Input RS232 Tx 3.3V TTL RS232 Rx 3.3V TTL System 0V Recommended Output Circuit TDS 0033 Issue 1.0 02/05/2024 Change Note: N/A Page 13 of 15... -
Page 14: Using The Open Collector Output To Drive A Relay
Axiom A2L Leak Detector User Manual Using the Open Collector Output to Drive a Relay Axiom’s Open Collector output can be used to drive a relay when connected as shown below. To do this, use the connect the relay coil between the Open Collector output (D-) and a 5V supply. On alarm or fault the Open collector output will be driven low, completing the circuit through the coil, and energising the relay. -
Page 15: Axiom Diagnostic Tool
Axiom A2L Leak Detector User Manual Axiom Diagnostic Tool (ADT) Axiom Diagnostic Tool (ADT) requires USB-C to USB PC cable connection. Axiom diagnostic information is available through a PC application, providing real time gas reading, access to configuration settings (baud rate, Modbus address) and detailed fault information to assist with service and maintenance.
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