RKI Instruments 65-2322RKSS - Manual (Page 15)

65-2322RKSS Oxygen Transmitter • 11
Replacing Components of the Oxygen Transmitter
This section includes a procedure to replace the plug-in oxygen sensor, a procedure to
replace the entire oxygen detector assembly, and one to replace the amplifier. In most
cases, it is not necessary to replace the entire detector assembly.
Replacing The Plug-in Oxygen Sensor
CAUTION: The plug-in sensor contains electrolyte that is an irritant. Do not disassemble the
sensor when replacing it with a new one. If electrolyte comes in contact with your
skin, wash affected area thoroughly with soap and water.
1. Turn off the controller.
2. Turn off or unplug power to the controller.
3. Unscrew the detector housing cap from the detector housing body. Make sure not to
lose the cap gasket.
4. Unplug and remove the oxygen sensor.
5. Carefully plug the replacement sensor into the socket pattern that is located in the
detector housing.
6. Make sure the cap gasket is in place and screw the detector housing cap back onto the
detector housing body.
7. Turn on power to the controller.
8. Turn on the controller and place into normal operation.
CAUTION: Allow the replacement sensor to warm up for 5 minutes before you continue with the
next step.
9. Calibrate the detector as described in “Calibration” on page 13.
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 flame arrestor in
the detector housing
cap is wet or clogged
with dirt or other
particulates.
• 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 detector housing cap to
determine if the flame arrestor is wet
or dirty. Clean or replace 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.
Table 2:Troubleshooting the Oxygen Transmitter (cont.)
Condition Symptom(s) Probable Causes Recommended Action