RKI Instruments 65-2504RK - Manual (Page 14)

10 • 65-2504RK Oxygen Transmitter
Replacing Components of the Oxygen Transmitter
This section includes procedures to replace the oxygen detector and amplifier.
Replacing the Oxygen Detector
1. Turn off the controller.
2. Turn off power to the controller.
3. Remove the junction box cover.
4. Disconnect the detector leads from the detector terminal strip. 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. Connect the detector leads to the amplifier’s detector terminal strip as shown in
Table 3 below and Figure 3 on page 6 of this manual.
8. Turn on power to the controller.
9. Turn on the controller.
10. Calibrate the replacement detector as described in “Calibration” on page 12 of this
manual.
Replacing the Amplifier
1. Turn off the controller.
2. Turn off power to the controller.
3. Remove the junction box cover.
4. Disconnect the detector leads from the detector terminal strip.
5. Disconnect the wiring that connects the oxygen transmitter to the controller from the
amplifier’s interconnect terminal strip.
6. Unscrew and remove the two screws that secure the amplifier to the junction box.
The screws are at the top left and bottom right of the amplifier.
7. Remove the amplifier.
8. Place the new amplifier in the same position as the amplifier you removed in the
previous step.
9. Use the two screws you removed in step 5 to secure the amplifier to the junction box.
Table 3: Reconnecting the Oxygen Detector
to the Amplifier
Detector Lead Detector Terminal Strip
White OXY W
Green OXY G