MULTI-TOUCH OPERATING PANEL
ETT 764
14.1 Data Retention Battery Change
The exchangeable buffer battery ensures that the following data is preserved in the
absence of a supply voltage:
l
Time
If the battery is empty, the following settings are reset or data is deleted:
l
Time (reset to default value)
14.2 Exchanging the Battery
1. Turn off the device supply.
2. Create ESD-compliant conditions
3. Remove the locking screws with a Torx
screwdriver.
4. Carefully lift the cover to access the battery holder.
5. Remove the battery from the holder.
6. Install the new battery with the correct polarity (+ pole facing up, away from the
circuit board).
7. Close the cover and tighten the locking screws (0.7 Nm).
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