RKI Instruments 65-2391RK - Manual (Page 14)

10 • 65-2391RK CO
2
Transmitter
Troubleshooting
The troubleshooting guide describes symptoms, probable causes, and recommended
action for problems you may encounter with the CO
2
transmitter.
NOTE: This troubleshooting guide describes transmitter problems only. See the
controller operator’s manual for problems you may encounter with the
controller.
Table 3:Troubleshooting the CO
2
Transmitter
Condition Symptom(s) Probable Causes Recommended Action
Fail Condition • Controller indicates a
fail condition.
• The transmitter wiring
is disconnected or
misconnected.
• The transmitter’s
reading in air is low
enough to cause a fail
condition.
• The transmitter is
malfunctioning.
1. Verify that the transmitter wiring is
correct and secure.
2. Calibrate the transmitter.
3. If the fail condition continues, replace
the detector.
4. If the fail condition continues, contact
RKI for further instruction.
Slow or No
Response/
Difficult or
Unable to
Calibrate • Transmitter responds
slowly or does not
respond to response
test.
• Unable to accurately
set the zero or
response reading
during calibration.
• Transmitter requires
frequent calibration.
Note: Under “normal”
circumstances, the
transmitter requires
calibration once every
six months.
Some applications
may require a more
frequent calibration
schedule.
• The calibration cylinder
is low, out-dated, or
defective.
• The transmitter is
malfunctioning.
1. Verify that the calibration cylinder
contains an adequate supply of a
fresh test sample.
2. Verify that the regulator used for
calibration is a 0.5 LPM regulator.
3. If the calibration/response difficulties
continue, replace the detector.
4. If the calibration/response difficulties
continue, contact RKI for further
instruction.