Cleaning And Maintenance; A) General; Cleaning The Housing; Cleaning The Lens - VOLTCRAFT WBM-460 Bedienungsanleitung

15. Cleaning and maintenance

a) General

The multimeter should be calibrated once a year to ensure that measurements remain accurate.
The measuring instrument does not need to be serviced (apart from occasional cleaning and replacing the battery/
fuse). Refer to the following sections for instructions on how to change the fuse and battery.
Regularly check the device and test leads for signs of damage.
b) Cleaning the housing
Always observe the following safety information before cleaning the device:
Opening covers on the product or removing parts that cannot be removed by hand may expose
voltage-carrying components.
Before cleaning or repairing, the leads must be disconnected from the measuring instrument and
all measured objects. Switch the DMM off.
Do not use abrasive detergents, petrol, alcohol or other similar chemicals to clean the device. These may corrode
the surface of the multimeter. In addition, the vapours emitted by these substances are explosive and harmful to your
health. Do not use sharp-edged tools, screwdrivers or metal brushes to clean the device.
Use a clean, damp, lint-free and antistatic cloth to clean the multimeter, display and test leads. Allow the multimeter
to dry out completely before using it again.
c) Cleaning the lens
Remove loose particles with clean compressed air and wipe off remaining residue with a fine lens brush. Clean the
surface of the lens with a lens cloth or a soft, lint-free cloth.
The cloth can be moistened with water or a lens cleaning solution to remove fingerprints and other residues.
Do not use any acidic, alcoholic or other solvents or rough, linty cloth to clean the lens.
Avoid applying too much pressure when cleaning the lens.
Close the lens cover after cleaning.
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