RKI Instruments 65-2515RK - Manual (Page 13)

65-2515RK Oxygen Detector • 9
8. Turn on the controller.
CAUTION: Allow the replacement sensor to warm up for 5 minutes before you continue with the
next step.
9. Calibrate the replacement sensor as described in “Calibration” on page 10.
Replacing the Oxygen Detector
NOTE: In most cases, it is only necessary to replace the plug-in oxygen sensor.
1. Turn off the controller.
2. Turn off or unplug incoming power to the controller.
3. Remove the junction box cover.
4. Disconnect the detector leads from the terminal block inside the junction box. Note
the position of the color-coded leads as you remove them.
5. Unscrew the detector from the junction box.
6. Guide the detector leads of the replacement detector through the bottom conduit hub
of the junction box, then screw the mounting threads of the detector into the conduit
hub.
7. Wire the detector leads to the terminal block in the same position as the leads you
removed in step 4.
8. Reinstall the junction box cover.
9. Turn on or plug in incoming power to the controller.
10. Turn on the controller.
CAUTION: Allow the replacement detector to warm up for 5 minutes before you continue with
the next step.
11. Calibrate the replacement detector as described in “Calibration” on page 10.
Calibration Frequency
Although there is no particular calibration frequency that is correct for all applications, a
calibration frequency of every 3 to 6 months is adequate for most applications. Unless
experience in a particular application dictates otherwise, RKI Instruments, Inc.
recommends a calibration frequency of every 3 months (quarterly).
If an application is not very demanding, for example detection in a clean, temperature
controlled environment, and calibration adjustments are minimal at calibration, then a
calibration frequency of every 6 months is adequate.
If an application is very demanding, for example if the environment is not well controlled,
then more frequent calibration than every 3 months may be necessary.