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11. Cleaning and maintenance
a) General information
The multimeter should be calibrated once a year to ensure that measurements remain accurate.
The multimeter does not need to be serviced (apart from occasional cleaning and replacing the battery).
Refer to the following sections for instructions on how to change the battery.
Regularly check the device and test leads for signs of damage.
b) Cleaning
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 servicing the multimeter, disconnect all cables from the multimeter and all
measured objects. Power the multimeter off.
Do not use abrasive detergents, petrol, alcohol or other similar chemicals to clean the device. These may corrode the
surface of the meter. 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 device to dry
completely before using it again.
c) Inserting/changing the batteries
To operate the multimeter, two 1.5 volt micro batteries (for example, AAA or LR03) are required. At initial start-up or
when the battery change symbol " " appears in the display, two new, fully charged batteries must be inserted.
In addition, a protective power-off prevents an incorrect measurement in the case of insufficient battery supply. In this
case, the device emits three beeps and then powers off. A battery change is required.
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