RKI Instruments 65-2432RK - Manual (Page 13)

65-2432RK CO Transmitter • 13
• Unable to accurately set the zero or response reading during the calibration
procedure.
• The transmitter requires frequent calibration.
NOTE: Under “normal” circumstances, the transmitter requires calibration once every
three months. Some applications may require a more frequent calibration
schedule.
Probable causes
• The calibration cylinder is low, out-dated, or defective.
• The transmitter is malfunctioning.
Recommended action
1. Verify that the calibration cylinder contains an adequate supply of a fresh test
sample.
2. If the calibration/response difficulties continue, replace the CO sensor as described
later in this section.
3. If the calibration/response difficulties continue, contact RKI Instruments, Inc., for
further instruction.
Replacing Components of the CO Transmitter
This section includes procedure to replace the CO sensor and amplifier. A procedure to
replace the entire detector assembly is at the end of this section. In most cases, it is not
necessary to replace the entire detector assembly.
Replacing the sensor
4. Turn off the controller.
5. Turn off or unplug incoming power at the power source end.
6. Unscrew the bottom section of the CO detector housing from the top section.
7. Unplug and remove the CO sensor with the boot and charcoal filter attached
8. Remove the rubber boot and charcoal filter from old sensor.
9. Install the rubber boot with charcoal filter onto the replacement sensor’s face.
10. Carefully plug the replacement sensor into the socket pattern that is located in the top
section of the detector housing.
NOTE: Match the sensor’s male pins with the four female sockets as you plug the sensor
into the socket.
11. Screw the bottom section of the detector housing onto the top section.
12. Turn on or plug in incoming power at the power source end.
13. Turn on the controller.
CAUTION: Allow the replacement sensor to warm up for 5 minutes before you continue with the
next step.
14. Calibrate the replacement sensor as described in the Calibration section of this
manual.