11 Instrument maintenance
118 NBM-550 Narda
The rechargeable batteries have a useful life of about 1000
charge cycles or 3 years (whichever occurs soonest).
Replace the batteries if the operating time is significantly
reduced although the batteries are fully charged.
Replacing the batteries
1. Switch off the instrument and disconnect it from all other
devices (AC Adapter / Charger, USB).
2. Open the battery compartment on the back of the
instrument.
3. Remove the old batteries and dispose of them according
to the waste disposal ordinances applicable in your
country.
4. Insert the new batteries.
Make sure you insert them the right way round according
to the diagram on the base of the battery compartment.
5. Close the battery compartment.
6. Connect the AC Adapter / Charger and charge the
batteries (a complete charge cycle takes about 2 hours).
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