RKI Instruments Eagle Series - Manual (Page 57)

Eagle Instruction Manual Maintenance • 50
serviceable components. For genuine RKI sensors, call RKI or your
local distributor. All sensors are covered by a limited warranty; see
warranty for details.
CAUTION: Avoid pulling on sensor wires. Always unplug at the connector.
Replacing the Combustibles Sensor
Replace the combustibles sensor when:
• The combustibles channel cannot be calibrated correctly.
• The LEL reading cannot be set to 0 by the Demand Zero command.
To replace the combustibles sensor:
1. Take the Eagle to a non-hazardous location, and turn the power
off.
2. Unscrew the two large screws on the top of the case, then carefully
lift the top of the case and lay it aside.
3. Unplug the four-wire connector (red/white/green/black) from
the circuit board.
4. Locate the combustibles sensor. With the batteries closest to you,
the combustibles sensor is at the top left corner of the sensor block.
5. Remove the two screws in the oval keeper plate, and remove the
sensor from the sensor block.
6. Unplug the cable socket from the top of the sensor. Retain the oval
keeper plate for use with the replacement sensor.
7. Install the replacement sensor in reverse order.
Replacing the Oxygen Sensor
Replace the oxygen sensor when:
• The O
2
channel cannot be set to 00.0% on an oxygen-free sample.
• The O
2
display cannot be set to 20.9% by the Demand Zero
command.
• The O
2
reading drifts noticeably. For example, if the O
2
reading
varies from 20.5 to 21.5 while you view the display for a few
seconds.
To replace the oxygen sensor:
1. Take the Eagle to a non-hazardous location, and turn the power
off.