Det-Tronics PIRECL Infrared Hydrocarbon Gas Detector PointWatch Eclipse - Manual (Page 25)

23 95-8526 14.2
4. Return to Normal is complete when:
A. The onboard LED changes from “off” to steady
green.
B. The LED within the PIRTB (if used) turns off.
C. The Eclipse current output returns to 4 mA after
detected calibration gas level drops below 5%
LFL or the calibration abort signal is provided.
tiMe oUt
If calibration is not completed within 10 minutes, a
calibration-failed fault is generated, and the unit returns to
normal operation using the previous calibration values.
NOTE
Under normal conditions, span calibration is
typically completed in 3 minutes or less.
Calibration abort
Calibration can be aborted at any time after zero
calibration is completed. This is done by activating the
onboard or PIRTB magnetic switch, or by a command
from the HART, MODBUS or EQP interface. If calibration
is terminated, the new zero point is retained, and a zero
calibration code is saved in the calibration history buffer.
The unit will immediately return to normal operation.
table 5—Quick Reference Guide for Zero only Calibration Procedure using Magnetic Switch
table 4—Quick Reference Guide for normal Calibration Procedure using Magnetic Switch
Description indicating leD
(on-board/pirtb)
Current output
(default setting)
operator action
Normal-ready to calibrate steady green/off 4 mA Purge with clean air if required
Initiate Calibration steady red/on-steady 1 mA Apply Magnet for 2 seconds min.
Zero Calibration complete flashing red/on-flashing 1 mA Apply Calibration Gas to device
Span Calibration in progress flashing red/on-flashing 1 mA Continue cal gas flow
Span Calibration complete off/on-steady 1 mA Remove Calibration Gas
Output Returns to Normal steady green/off 4 mA Calibration Completed
Normal Operation steady green/off 4 mA None
Description indicating leD
(on-board/pirtb)
Current output
(default setting)
operator action
Normal-ready to calibrate steady green/off 4 mA Purge with clean air if required
Initiate Calibration steady red/on-steady 1 mA Apply Magnet for 2 seconds min.
Zero Calibration complete flashing red/on-flashing 1 mA Re-initiate magnetic switch
to terminate calibration
Return to Normal Mode steady green/off 4 mA Zero Calibration Completed