RKI Instruments Inert Gas Testing Eagle with Two Pumps - Manual (Page 58)

52 • Maintenance Eagle Instruction Manual
4. Unplug the cable leading from the oxygen sensor at the large
multi-pin connector.
5. Loosen the screws on the metal strap that covers the oxygen
sensor.
6. Push the strap toward the screw that is furthest away from the
battery compartment.
7. Swing the strap aside.
8. Remove the oxygen sensor.
9. Install the replacement sensor in reverse order.
Replacing the H
2
S Sensor
Replace the H
2
S sensor when:
• The H
2
S channel cannot be calibrated correctly.
• The H
2
S reading cannot be set to 0.0 by the Demand Zero
command.
NOTE: Allow up to 1/2 hour after you replace the H
2
S sensor, or if
charged batteries have not been installed for an extended
period, for the channel to show a normal response, then
calibrate the sensor.
To replace the H
2
S 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 H
2
S sensor. With the batteries closest to you, the H
2
S
sensor is at the top right corner of the sensor block.
4. Unplug the sensor connector from the circuit board.
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.