Calibration Interval; Battery Replacement - Elma Instruments 1500B Bedienungsanleitung

5.2 Calibration Interval

The voltage testers must be calibrated periodically and checked by our service department
at regular intervals to ensure the specified accuracy of measurement results. We
recommend a calibration interval of one year.

5.3 Battery Replacement

If no signal sound is audible when short-circuiting the test probes, proceed with the battery
replacement.
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Please consider your environment when you dispose of your oneway batteries or
accumulators. They belong in a rubbish dump for hazardous waste. In most cases,
the batteries can be returned to their point of sale.
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Completely disconnect Elma 1500B from the measurement circuit.
Loosen screw down instrument.
Remove discharged batteries.
Replace by new batteries, type 1.5V IEC LR03 by respecting
correct polarity.
Insert the battery case and close it.
Please, comply with the respective valid regulation regarding the
return, recycling and disposal of used batteries and accumulators.
If an instrument is not used over an extended time period, the
accumulators or batteries must be removed. Should the instrument
be contaminated by leaking battery cells, the instrument has to be
returned for cleaning and inspection to the factory.
Elma 107 Page 40