RKI Instruments 65-2485RK-02 - Manual (Page 16)

12 • 65-2485RK-02 Multi Point Detector
Replacing Components of the Multi-Point Detector
This section includes maintenance procedures for the oxygen detector, the CO detector,
and the H
2
S detector.
Oxygen Detector
This section contains instructions to replace the plug-in oxygen sensor and to replace the
entire detector assembly. In most cases it in 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 or plug in power to the controller.
Slow or No
Response/
Difficult or
Unable to
Calibrate • Detector responds
slowly or does not
respond to response
test.
• Unable to accurately
set the zero or
response reading
during calibration.
• Detector 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 CO, O
2
, or H
2
S
detector housing cap is
wet or clogged with dirt
or other particulates.
• The calibration gas is
not an appropriate
concentration.
• The detector 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 if necessary.
3. Verify that the calibration gas
concentration is appropriate for each
detector.
4. If the calibration/response difficulties
continue, replace the CO, O
2
, or H
2
S
plug-in sensor as described later in
this section.
5. If the calibration/response difficulties
continue, contact RKI for further
instruction.
Unexplained
Upscale
Readings or
Alarms • Controller indicates a
reading that cannot
be verified.
• Alarms occur at the
controller that cannot
be explained.
• Charcoal filter in CO
detector is saturated
and no longer
scrubbing out
interfering gases.
1. Replace charcoal filter in the CO
detector.
2. If difficulties continue, contact RKI for
further instructions.
Condition Symptom(s) Probable Causes Recommended Action