RKI Instruments 65-2331RK - Manual (Page 17)

65-2331RK H
2
S Transmitter • 13
3. Unscrew the detector housing cap from the detector housing body. Make sure not to
lose the cap gasket.
4. Unplug and remove the H
2
S sensor with the rubber boot and spacer attached.
5. Remove the rubber boot and spacer from the old sensor.
6. Install the spacer and rubber boot onto the replacement sensor’s face.
7. Carefully plug the replacement sensor into the four-socket pattern that is located in
the detector housing.
8. Make sure the cap gasket is in place and screw the detector housing cap back onto the
detector housing body.
9. Turn on or plug in power to the controller.
10. 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.
11. Calibrate the transmitter as described in the “Calibration” on page 15.
Replacing the H
2
S Detector
NOTE: In most cases, it is only necessary to replace the plug-in H
2
S sensor.
1. Turn off the controller.
2. Turn off or unplug power to the controller.
3. Remove the junction box cover.
4. Remove the detector terminal strip from its socket.
5. Disconnect the detector leads from the detector terminal strip. Note the position of the
color-coded leads as you remove them.
6. Unscrew the detector from the junction box conduit hub.
7. 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. If necessary for environmental conditions, apply thread sealant or teflon tape to
the hub and/or detector threads to seal them.
8. Connect the detector leads to the appropriate detector terminal strip terminals.
Connect the red wire to the terminal labeled TOXIC + and the black wire to the
terminal labeled TOXIC -. See Figure 4 for the detector wiring connections to the
amplifier.
9. Reinstall the detector terminal strip into its socket.
10. Reinstall the junction box cover.
11. Turn on or plug in power to the controller.
12. Turn on the controller and place it into normal operation.
CAUTION: Allow the replacement detector to warm up for 5 minutes before you continue with
the next step.
13. Calibrate the replacement detector as described in “Calibration” on page 15.