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Eagle Instruction Manual Maintenance • 49
To replace the H
2
S or CO 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. Locate the toxic gas sensor you intend to replace. With the
batteries closest to you, the sensor for Channel 3 is at the top right
corner of the sensor block, and the sensor for Channel 4 is at the
bottom right corner of the sensor block. Note the color of the leads
extending from the sensor you intend to replace.
4. Unplug the appropriate sensor connector from the circuit board.
Use the color of the leads to determine the appropriate connector.
5. Remove the sensor from the sensor block. If necessary, wiggle the
sensor to work it out of the seal.
6. Install the replacement sensor in reverse order.
CAUTION:Verify that you install the H
2
S or CO sensor in the appropriate
flow block position. The Eagle will display inaccurate H
2
S and
CO readings if the sensors are not installed in the correct flow
block positions.
The Eagle continues to display H
2
S and CO readings in the
same channels as it did previously regardless of which socket
(EC1 or EC2) the sensor is wired to or into which flow block
position the sensor is installed. However, the H
2
S and CO
reading will be inaccurate due to the charcoal filter installed
before the CO flow block position.