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30 6. Service and Maintenance
6.4 Changing the module
The instrument must be newly calibrated if a module is
changed (See 5.4 Calibrating instrument, page 28)!
Instrument must be switched off. Plug contacts in the instrument
should not be touched!
1 Unscrew the screws at the back of the instrument.
2 Remove module and attach new module.
There must be rubber sealing rings available for the screws.
Check that the sealing rings are in their correct position.
3 Tighten screws.
6.5 Changing battery
1 Open battery compartment at the back of the instrument.
2 Remove spent button cell and insert new button cell (Type
CR2032, 3V). The (+) symbol should be visible.
3 Close the battery compartment.
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