Instruction 0019-9337
18
Oxor® III
5.4 O
2
Sensor Replacement
Material Required:
• O
2
Sensor, P/N (0024-8106)
• #1 Phillips Screwdriver
Procedure:
1. Disassemble the analyzer as follows:
a. Remove the battery cover and the batteries, uncovering one of
the cover hold-down screws.
b. Remove and set aside all four cover hold-down screws.
c. With the analyzer on its back, remove the front cover, laying it
face down to the left of the body.
d. Carefully remove the circuit board, slipping off the battery con-
nec tor on top, and then laying the circuit board face down in the
top cover.
2. Slip off the oxygen sensor's electrical connector from the circuit
board. Push down and twist counterclockwise. Then pull the oxygen
sensor out of its socket (see Figure 5-2).
Tip:
To obtain a better grip on the oxygen sensor, it may be necessary to
remove the screw that secures the sensor socket to the case.
3. Using the old sensor as a guide, remove the paper backing from the
new sensor gasket contained in the replacement kit and adhere it
to the new sensor.
4. Properly dispose of the old oxygen sensor (see instruction sheet that
comes with the new sensor).
5. Mount the new oxygen sensor in its socket. If the sensor socket was
removed in Step 2, re-attach it to the case.
6. Plug the oxygen sensor's electric connector into the printed circuit
board (observe polarity; see Figure 5-2). Reassemble the analyzer.
Note:
The sensor may take several hours to stabilize after being con-
nected to the printed circuit board.
