Operating Manual
Chapter 6, Warranty, Maintenance and Troubleshooting
Repair Procedures
Battery Pack Replacement
Remove the Battery Pack
1. Remove the two battery mounting screws on the back of
the instrument.
2. Pull out the battery pack by gripping it at the edge of the
battery pack case and pulling it away from the unit.
Replace the Battery Pack
3. Insert the front of the battery pack under the lip on the case
and snap the bottom of the battery pack into the case.
4. Install and tighten the battery mounting screws.
Sensor Replacement
1. Verify that the instrument is turned OFF; remove battery pack.
2. If your unit is a pumped version, remove the pump cover by
removing the screw with a 1/16" hex key.
3. Remove the sensor cover screws and cover.
4. Gently lift out the sensor to be replaced; properly dispose
of sensor.
NOTE: Sensor positions cannot be changed. Each sensor
location is identified by a label in the bottom of each
sensor well. When replacing a sensor, ensure that
the gas type printed on the sensor label matches the
sensor identification label in the instrument.
5. If replacement sensor is equipped with a shorting plate, clip
or wire attached to its pins, remove plate, clip or wire before
inserting the replacement sensor.
6. Carefully align the new sensor contact pins with the sockets
on the printed circuit board.
7. Press the new sensor into place.
8. Replace the sensor gasket and sensor cover.
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