Det-Tronics PIRECL Infrared Hydrocarbon Gas Detector PointWatch Eclipse - Manual (Page 42)

F-3 95-8526 14.2
connections AnD hArDWAre
The HART Communicator can interface with the Eclipse from the onboard I.S. communication port, from the control room,
or any wiring termination point in the analog output signal loop. To communicate, connect the HART communicator in
parallel with the Eclipse analog signal or load resistor. The connections are non-polarized.
NOTE
The HART Communicator needs a minimum of 250 ohms resistance in the loop to function properly. The HART
Communicator does not measure loop resistance. Any external ohmmeter is required.
coMMonlY UseD hArt coMMAnDs
The most commonly used HART commands for the PIRECL are:
1. Performing basic setup functions such as:
• Assigning a tag number to the detector
• Assigning unit of measure (%LEL, PPM, % Vol)
2. Performing detailed setup functions such as:
• Assigning a special gas type
• Configuring Gas Alarm Levels (Low & High threshold)
• Configuring Fault Codes (analog signal output levels during various fault conditions)
• Configuration of HART and MODBUS communication protocols
• Write-protecting the HART programming, or assigning a password to protect the setup.
3. Performing Diagnostic and Service functions such as:
• Reset Alarms or Faults
• Performing a signal loop output test
• Performing a Calibration
• Monitoring detector history/data logs
It is important for the user to understand how to correctly operate the HART Field Communicator, and how to navigate
through the various programming options and either select or de-select the desired parameters. This document does
NOT cover this fundamental information on the HART Field Communicator. Please refer to the Field Communicator
instruction manual for specific guidance on how to operate the communicator.