65-2340RK Toxic Gas Transmitter • 15
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.
4. Unplug and remove the toxic sensor.
5. Remove the black plug from the top of the replacement sensor.
Slow or No
Response/
Difficult or
Unable to
Calibrate
• 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 18 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.
Table 2: Troubleshooting the Toxic Gas Transmitter (cont.)
Condition
Symptom(s)
Probable Causes
Recommended Action
