Observe the following notes from the operating instructions:
5.4 Commissioning
The product is equipped with a backup battery.
The 3 x LR44/AG13 button cells are already in the battery
compartment. Open the battery compartment and
remove the insulating strip. Then briefly press the reset
button.
All settings can now be made conveniently without
having to plug the product into the socket.
5.4.5 Replace batteries
The energy meter is supplied from the factory with
3 x 1.5 V LR44/AG13 button cells in the battery compartment. To replace the batteries, proceed as follows:
The battery compartment is located on the back of the
instrument. Using a flat screwdriver, carefully lift the
cover cap of the battery compartment. Remove the
empty batteries and replace them with new ones.
Pay attention to the polarity (+/-) as printed on the inside
of the cover cap (flat side (+) left). Carefully replace the
cover. Be careful not to bend the contacts when closing
the battery compartment.
The battery compartment must be closed before use.
During extended periods of non-use, remove the
batteries from the energy meter to prevent leakage.
Leaking batteries can cause electric shock and damage
to the energy meter.
Replace batteries only when the energy meter is disconnected from the power supply.
Replace batteries only with batteries of the same type.
Do not mix new and empty batteries. Do not dispose of
batteries with household waste. Dispose of batteries at
the appropriate collection points.