5 Maintenance
128 Keysight U1251B and U1252B User’s and Service Guide
Introduction
General maintenance
Besides the above hazard, dirt, or moisture in the terminals can distort readings.
The steps for cleaning are as follows:
1 Turn the meter off and remove the test leads.
2 Turn the meter over and shake out any dirt that may have accumulated in the
terminals.
3 Wipe the case with a damp cloth and a mild detergent — do not use abrasives
or solvents. Wipe the contacts in each terminal with a clean swab dipped in
alcohol.
Battery replacement
The meter is powered by a 9 V Ni-MH rechargeable battery, 8.4 V nominal
voltage. Use only the specified type (refer to Figure 5-1). To ensure that the
correct battery type is used, replace the battery immediately when the low battery
sign flashes. If your meter has the rechargeable battery type, refer to the section
“Charging the battery” on page 131.
CAUTION
Any repair or service which is not covered in this manual should only be
performed by qualified personnel.
WARNING
Ensure that the terminal connections are correct for that particular
measurement before proceeding. To avoid damaging the device, do not
exceed the input limit.
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