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If one actions the hatch when the battery is flat, no more display can happen.
Invert replacement battery polarity during 3 seconds (in this case only)
before connecting this new battery the right way.
Battery
Hatch must be closed when battery is changed
Remove the battery, if the meter is not to be used during
several months.
If battery is changed within 30 seconds , datas are kept in
memory.
A battery icon is displayed when battery gets weak.
EEE message when battery is flat.
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