RKI Instruments 65-2330RK - Manual (Page 16)

12 • 65-2330RK H
2
S Transmitter
9. Calibrate the transmitter as described in “Calibration” on page 13.
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. Turn on or plug in power to the controller.
11. 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.
12. Calibrate the replacement detector as described in “Calibration” on page 13.
13. Secure the junction box cover to the junction box.
Replacing the Hydrophobic Membrane
1. Turn off the controller.
2. Turn off or unplug incoming power to the controller.
3. Unscrew the detector housing cap from the detector housing body.
4. Gently pry up the edge of the white hydrophobic membrane with a small flat blade
screwdriver or a similar tool.
5. Peel off the hydrophobic membrane. It may be necessary to clean off the detector
housing cap face to remove any residue left from the adhesive backed membrane.
6. Install the new membrane in the recess on the face of the detector housing cap.
7. Make sure the cap gasket is in place and screw the detector housing cap back onto the
detector housing body.
8. Turn on power to the controller.
9. Turn on the controller.