RKI Instruments 65-2321RK - Manual (Page 14)

10 • 65-2321RK Oxygen Transmitter
4. When the display reading rises above the decreasing alarm setpoint, return the
controller to normal operation.
Quarterly
Calibrate the oxygen transmitter as described in “Calibration” on page 13 of this manual.
See the calibration frequency discussion in “Calibration Frequency” on page 13 to
determine if a quarterly calibration schedule fits your needs.
Troubleshooting
The troubleshooting guide describes symptoms, probable causes, and recommended
action for problems you may encounter with the oxygen transmitter.
NOTE: This troubleshooting guide describes transmitter problems only. See the
controller operator’s manual for problems you may encounter with the
controller.
Table 2:Troubleshooting the Oxygen Transmitter
Condition Symptom(s) Probable Causes Recommended Action
Fail Condition • Controller indicates a
fail condition.
• The transmitter wiring
is disconnected or
misconnected.
• The plug-in sensor is
not properly plugged
into the sockets in the
detector housing body.
• The transmitter’s zero
reading is low enough
to cause a fail
condition.
• The transmitter is
malfunctioning.
1. Verify that the transmitter wiring is
correct and secure.
2. Confirm that the plug-in sensor is
installed properly.
3. Perform a fresh air adjustment. A full
calibration is recommended.
4. If the fail condition continues, replace
the plug-in sensor as described later
in this section.
5. 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 fresh air or
zero reading during
calibration.
• Transmitter requires
frequent calibration.
Note: Under “normal”
circumstances, the
transmitter requires
calibration once every 3
months.
Some applications
may require a more
frequent calibration
schedule.
• The calibration cylinder
is low, out-dated, or
defective.
• The calibration gas is
not an appropriate
concentration.
• The transmitter is
malfunctioning.
1. Verify that the calibration cylinder
contains an adequate supply of a
fresh test sample.
2. Check the sensor face for dirt. Clean
if necessary.
3. Verify that the calibration gas
concentration is appropriate for the
transmitter. Zero emission air (20.9%
oxygen) is normally used for a fresh
air adjustment if the environment is
suspect and 100% nitrogen (0%
oxygen) is normally used for a zero
adjustment.
4. If the calibration/response difficulties
continue, replace the plug-in sensor
as described later in this section.
5. If the calibration/response difficulties
continue, contact RKI for further
instruction.