RKI Instruments 35-3001-09 User Manual
Page 19
35-3001-09 Oxygen/Hydrogen Sulfide Sample-Draw Detector • 15
Quarterly Calibration
Calibrate the sample-draw detector as described in “Calibration, Oxygen Sensor” on page 19 and
“Calibration, H
2
S Sensor” on page 20.
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 Operator’s Manual if the controller exhibits any problems.
Fail Condition
Symptoms
•
The sample-draw detector’s Fail LED is on.
•
The monitoring device is operating properly but indicates a reading well below zero.
Probable causes
•
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.
•
The sensor wiring is disconnected or misconnected.
Recommended action
1.
At the sample-draw detector, set the correct flow rate with the sensor flow control valve.
2.
If you cannot set the correct flow rate, check the sample lines for obstructions or kinks.
3.
Verify that the sensor wiring is correct and secure. “Wiring the Sample-Draw Detector to a
Controller” on page 10 describes sensor wiring connections.
4.
Calibrate the sample-draw detector as described in “Calibration, Oxygen Sensor” on page 19
and “Calibration, H
2
S Sensor” on page 20.
5.
If the fail condition continues, replace the sensor(s) as described in “Replacing Components of
the Sample-Draw Detector” on page 16.
6.
If the fail condition continues, contact RKI Instruments, Inc. for further instruction.
Slow or No Response/Difficult or Unable to Calibrate
Symptoms
•
The sensor 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 sensor requires frequent calibration.
Probable causes
•
The calibration cylinder is low, out-dated, or defective.
•
If a demand flow regulator calibration kit is used, the demand flow regulator is not functioning
properly.
•
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.