RKI Instruments 65-2399RK-CH4 - Manual (Page 15)

65-2399RK-CH4 Combustible Gas Transmitter • 11
Troubleshooting
The troubleshooting guide describes symptoms, probable causes, and recommended
action for problems you may encounter with the methane 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 Methane Transmitter
Condition Symptom(s) Probable Causes Recommended Action
Fail Condition • Controller indicates a
fail condition.
• The transmitter wiring
is disconnected or
misconnected.
• The wiring from the
detector to the
amplifier is
disconnected or
misconnected.
• The plug-in sensor is
not properly plugged
into the 3 socket
pattern 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. Verify that the wiring from the detector
to the amplifier is correct and secure.
3. Confirm that the plug-in sensor is
properly installed.
4. Perform a zero adjustment. A full
calibration is recommended.
5. If the fail condition continues, replace
the sensor as described later in this
section.
6. 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 6
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 membrane on the
detector housing cap is
blocked with dirt or
some other particulate
matter.
• The transmitter is
malfunctioning.
1. Verify that the calibration cylinder
contains an adequate supply of a
fresh test sample.
2. Verify that the calibration gas
concentration is appropriate for the
transmitter.
3. Check the face of the detector
housing cap and remove any
particulate contamination from the
hydrophobic membrane if necessary.
If membrane appears saturated with
contamination or damaged, replace
the membrane as described in the
next section.
4. If the calibration/response difficulties
continue, replace the sensor as
described later in this section.
5. If the calibration/response difficulties
continue, contact RKI for further
instruction.