78 • Chapter 6: Maintenance HS-04 Operator’s Manual
Replacing the Sensor
1. Verify that the HS-04 is off.
2. Remove the rubber boot, if installed.
3. Use a small Phillips screwdriver to unscrew the 4 screws that attached the front case to the
rear case.
4. Turn the instrument right side up. The screws are not captive and may fall out. Be sure not to
lose them.
5. Remove the front case from the rear case.
6. Turn the front case upside down.
7. Remove the old sensor. It will either be in its rear case socket or it will be stuck to the sensor
gasket in the front case.
Figure 17: Unscrewing Case Screws
Figure 18: Case Separation
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