RKI Instruments 65-2484RK-06 - Manual (Page 20)

16 • 65-2484RK-06 Multi Point Detector
6. Make sure the cap gasket is in place and screw the detector housing cap back onto the
detector housing body.
7. Turn on or plug in power to the controller.
8. Turn on the controller and place into normal operation.
CAUTION: Allow the replacement sensor to warm up for 5 minutes before you continue with the
next step.
9. Calibrate the detector as described in “Calibration, O
2
Detector” on page 21.
Replacing the Oxygen Detector
NOTE: In most cases, it is only necessary to replace the oxygen sensor.
1. Turn off the controller.
2. Turn off or unplug incoming power to the controller.
3. Remove the junction box cover from the bottom junction box.
4. Disconnect the detector leads from the terminal block in the junction box. Note the
position of the color-coded leads as you remove them.
5. Unscrew the detector from the junction box hub.
6. Guide the detector leads of the replacement detector through the junction box hub
then screw the mounting threads of the detector into the hub. If necessary for
environmental conditions, apply thread sealant or teflon tape to the hub and/or
detector threads to seal them.
7. Connect the detector leads to the terminal block the same way the old detector was
wired. See the controller operator’s manual and the controller’s detector head
specification sheet for the multi-point detector to verify the connections are correct.
Also see Figure 6 for a wiring diagram.
8. Reinstall the junction box cover.
9. Turn on or plug in 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, O
2
Detector” on
page 21.
H
2
S Detector
This section includes a procedure to replace the H
2
S sensor and one to replace the entire
detector assembly. In most cases it is not necessary to replace the entire detector assembly.
Replacing the Plug-In H
2
S Sensor
CAUTION: The 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.