RKI Instruments 65-2340RK - Manual (Page 15)

65-2340RK Toxic Gas Transmitter • 11
Replacing Components of the Toxic Gas Transmitter
This section includes a procedure to replace the plug-in toxic sensor, a procedure to
replace the entire toxic 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 Toxic Sensor
CAUTION: The plug-in sensor contains electrolyte which is a dilute acid. Do not disassemble the
sensor when replacing it with a new one. If sensor 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 with the splashguard from the detector housing
body. Make sure not to lose the cap gasket.
Table 2:Troubleshooting the Toxic Gas 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 socket 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 zero (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 zero or
response 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 incorrect
calibration cup or
regulator is being
used.
• The plug-in sensor
face is blocked with dirt
or some other
particulate
contamination.
• 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. Confirm that you are using the correct
calibration cup and regulator for your
detector type. See Table 3 on page 14
for a list of the required calibration
cups and regulators.
3. Check the plug-in sensor face and
remove any particulate contamination
if necessary.
4. Verify that the calibration gas
concentration is appropriate for the
transmitter. The concentration should
be in the detection range, preferably
about half of the detection range.
5. If the calibration/response difficulties
continue, replace the plug-in sensor
as described later in this section.
6. If the calibration/response difficulties
continue, contact RKI for further
instruction.