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03 Series Operator’s Manual
Maintenance • 68
8. Reinstall the front case to the rear case.
9. Screw in the 4 screws that were removed in Step 3.
10. Reinstall the rubber boot if it is being used.
11. Calibrate the new sensor as described in “Calibration Mode” on
page 31.
Replacing the Sensor Membrane and Charcoal Filter
WARNING: Replace the sensor membrane and charcoal filter in a
non-hazardous environment.
NOTE:
An alligator or belt clip may be installed on the instrument but is
not shown in the figures in this section.
When replacing the sensor filters, it is recommended that you replace all
filters at the same time.The HS-03 and OX-03 only have a sensor
membrane. The CO-03 has a sensor membrane and a charcoal filter.
1. Verify that the 03 Series is off.
2. Remove the rubber boot, if installed.
3. With a small Phillips screwdriver, carefully unscrew the four screws that
attach the rear case to the front case.
4. Turn the instrument right side up. The screws are not captive and will
fall out. Be sure not to lose them.
5. Remove the front case from the rear case.
Figure 17: Case Separation
Front Case
Rear Case
Screw, 4x