RKI Instruments 35-3000RK-OXY User Manual
Page 14
14 • 35-3000RK-OXY Sample-Draw Oxygen Detector
Troubleshooting
The troubleshooting guide describes symptoms, probable causes, and recommended
action for problems you may encounter with the sample-draw detector.
NOTE:
This troubleshooting guide describes sample-draw detector problems only. See
the controller instruction manual for problems you may encounter with the
controller.
Fail condition
Symptoms
•
The sample-draw detector’s FAIL light is on.
•
The controller is operating properly but indicates a reading well below zero.
Probable causes
•
The detector wiring is disconnected or misconnected.
•
The sample-draw detector’s flow rate is too low because of an obstructed sample line,
failed pump, etc.
•
The sample-draw detector is malfunctioning.
Recommended action
1.
At the sample-draw detector, set the correct flow rate with the bypass valve or flow
adjust potentiometer.
2.
If you cannot set the correct flow rate, check the sample lines for obstructions or kinks.
3.
Verify that the detector wiring is correct and secure. The Installation section on page 9
describes detector wiring connections.
4.
Calibrate the sample-draw detector as described in the Calibration section on page 17.
5.
If the fail condition continues, replace the oxygen sensor as described later in this
section.
6.
If the fail condition continues, contact RKI Instruments, Inc., 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 fresh air or zero 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 sample-draw detector’s flow rate is too low because of an obstructed sample line,
failed pump, etc.
•
The sample-draw detector is malfunctioning.