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Batteries drained: replace batteries.
E-8 can mean a number of things, depending on the instructions…
Meter failure: contact customer service.
E-6 can mean a number of things, depending on the instructions…
Handling error.
E-4 can mean one of two things depending on the instructions…
A meter error has occurred or the meter is defective.
There is no cassette in the meter.
E-1 can mean a number of things, depending on the instructions…