8 • 65-2428 H
2
S Detector
Quarterly
Calibrate the H
2
S detector as described in “Calibration” on page 11.
Troubleshooting
The troubleshooting guide describes symptoms, probable causes, and recommended
action for problems you may encounter with the H
2
S detector.
NOTE:
This troubleshooting guide describes detector problems only. See the controller
operator’s manual for problems you may encounter with the controller.
Fail Condition
Symptoms
•
The controller indicates a fail condition.
Probable causes
•
The detector wiring is disconnected or misconnected.
•
The detector’s zero reading is low enough to cause a fail condition.
•
The detector is malfunctioning.
Recommended action
•
Verify that the detector wiring is correct and secure.
•
Calibrate the detector.
•
If the fail condition continues, replace the H
2
S sensor as described later in this section.
•
If the fail condition continues, contact RKI for further instruction.
Slow or No Response/Difficult or Unable to Calibrate
Symptoms
•
The detector responds slowly or does not respond during the monthly response test.
•
Unable to accurately set the zero or response reading during the calibration
procedure.
•
The detector requires frequent calibration.
NOTE:
Under “normal” circumstances, the detector requires calibration once every three
months. Some applications may require a more frequent calibration schedule.
Probable causes
•
The calibration cylinder is low, out-dated, or defective.
•
The detector is malfunctioning.
Recommended action
1.
Verify that the calibration cylinder contains an adequate supply of a fresh test sample.
2.
If the calibration/response difficulties continue, replace the H
2
S sensor as described
later in this section.
3.
If the calibration/response difficulties continue, contact RKI Instruments, Inc. for
further instruction.
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