Maintenance

To maintain the detector in good operating condition, perform the following basic maintenance as required.

Calibrate, bump test, and inspect the detector on a regular schedule.
Maintain an operations log of all maintenance, bump tests, calibrations, and alarm events
Clean the exterior with a soft damp cloth. Do not use solvents, soaps, or polishes.
Do not immerse the detector in liquids.

Charging the Detector

Warning

Charge only in a safe area that is free of hazardous gas within temperatures of 32° F-113°F (0°C-45°C).

Charge the battery after each workday. To charge the battery, refer to the following procedures and illustration:

Deactivate the detector.
Insert the charging adapter plug into an AC outlet.
Connect the charging adapter to the detector IR receptacle. Refer to the following illustration.
Allow the battery to charge for 6 hours.
To reach full battery capacity, allow a new battery to fully charge and discharge three times.

Replacing a Sensor or Sensor Filter

Warning

To avoid personal injury and/or property damage, only use sensors that are specifically designed for the detector.

Note Detectors that are configured for 1, 2, or 3 gases may contain a dummy sensor in one of the four sensor locations.

To replace a sensor or sensor filter, refer to the following figure, table and procedures #1-13

Item	Description
1	Front shell
2	LEL sensor
3	PCB
4	PCB screws (2)
5	Pump
6	Rear shell
7	Machine screws (6)
8	Pump inlet
9	Pump filter (particulate)
10	Moisture filter
11	CO sensor
12	H₂S sensor
13	O₂ sensor
14	Sensor filter

1. Deactivate the detector.

2. Remove the pump inlet screw and the pump inlet.

3. Remove the six machine screws from the rear shell.

4. Because the pump hose is connected to the rear shell and front shell pump, carefully remove the rear shell by lifting upward and tilting to the left. Both the rear and front shell are laying flat side by side.

5. Remove the two PCB screws.

6. Lift the PCB upward and tilt to the left. Lay the PCB (sensors facing up) onto the rear shell.

7. Slide the LEL, CO, and H2S sensor(s) outward to remove.

To remove the oxygen sensor, gently insert a screwdriver to the back of the oxygen sensor to push out the sensor.

8. Insert the new sensor(s) and replace the sensor filter.

9. Reassemble the detector and replace the two PCB screws.

10. Replace the six machine screws.

11. If required, replace the pump and moisture filter.

12. Replace the pump inlet and the pump inlet screw.

13. Activate the detector and then calibrate the new sensor(s). Refer to Calibration.