RKI Instruments Pioneer 4W User Manual
Page 97
Pioneer Operator’s Manual (PRELIMINARY)
Oxygen Transmitter • 21
Replacing Components of the Oxygen Transmitter
This section includes procedure to replace the oxygen sensor, amplifier, and sensor
backup battery.
Replacing the oxygen sensor
1.
Place the Pioneer’s power switch in the OFF position.
2.
Loosen the two securing screws from the detector junction box cover, then remove the
cover.
The sensor is mounted to the back of the junction box cover. A retaining strip secures the
sensor to the cover. The retaining strip is secured by two screws in standoffs. One end of
the strip has a slot cutout.
3.
Loosen one of the screws that secures the retaining strip (cutout end), then rotate the
retaining strip so it no longer covers the sensor.
4.
Unplug the sensor socket from the male connector, them remove the sensor.
5.
Place the replacement sensor in the same position as the original sensor, then rotate
the securing strip over the sensor. Tighten the screw you removed in step 3 to secure
the sensor to the junction box cover.
6.
Plug the socket of the replacement sensor into the male connector.
7.
Place the Pioneer’s power switch in the ON position.
8.
Secure the detector junction box cover to the junction box with the two screws you
removed in step 2.
9.
Calibrate the replacement detector as described in the Calibration section of this
insert.
Replacing the amplifier
1.
Place the Pioneer’s power switch in the OFF position.
2.
Remove the amplifier junction box cover.
3.
Disconnect the wiring from the detector terminal strip.
NOTE:
Leave the opposite end of the wiring connected in the detector junction box.
4.
Disconnect the wiring from terminals 4/20 FB and 24V + of the interconnect terminal
strip.
NOTE:
Leave the opposite end of the wiring connected at the Pioneer.
5.
Unscrew and remove the two screws that secure the amplifier to the junction box.
The screws are at the top right and bottom left of the amplifier.
6.
Remove the amplifier.
7.
Place the new amplifier in the same position as the amplifier you removed in the
previous step.
8.
Use the two screws you removed in step 5 to secure the amplifier to the junction box.
9.
Verify that the jumper block is installed over the OXY selector of the amplifier type
selector as shown in Figure 3, Wiring the Oxygen Transmitter to the Pioneer Gas
Monitor.