Fluke BT520 User Manual page 62

BT520
Users Manual
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7-2
Remove the batteries if the Product is not used for an
extended period of time, or if stored in temperatures that
exceed the specification of the battery manufacturer. If the
batteries are not removed, battery leakage can damage the
Product.
Connect the battery charger to the mains power outlet
before the Product.
Use only Fluke approved power adapters to charge the
battery.
Keep cells and battery packs clean and dry. Clean dirty
connectors with a dry, clean cloth.
Do not keep cells or batteries in a container where the
terminals can be shorted.
Ensure fuse continuity. If the protective fuse opens, the mΩ
function will display 'OL' with all probe tip conductors short
circuited.
Replace a blown fuse with exact replacement only for
continued protection against arc flash.
After extended periods of storage, it may be necessary to
charge and discharge the battery packs several times to
obtain maximum performance.