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13. Maintenance and cleaning
Never operate the measurement device when it is open.
RISK OF FATAL INJURY!
a) General
To ensure the accuracy of the multimeter over an extended period of time, it should be calibrated
once a year.
Apart from occasional cleaning and fuse replacements, the multimeter requires no servicing.
Information on changing the battery and fuse appears below.
Regularly check the technical safety of the instrument and measuring lines,
e.g. check for damage to the housing or squeezing etc.
b) Cleaning
Live components may be exposed if covers are opened or parts are removed.
The connected lines must be disconnected from the measuring device and all
measuring objects prior to cleaning or repairing the device. Switch the DMM
off.
Do not use any carbon-containing cleaning agents or petrol, alcohol or the like to clean the
product.
These could corrode the surface of the measuring instrument. Furthermore, the fumes are
hazardous to your health and explosive. Moreover, you should not use sharp-edged tools,
screwdrivers or metal brushes or similar for cleaning.
For cleaning the device or the display and the measuring lines, use a clean, fuzz-free, antistatic
slightly damp cloth.
c) Fuse replacement (only for VC155)
Using mended fuses or bridging the fuse holder is not admissible for safety
reasons.
Never operate the measurement device when it is open.
RISK OF FATAL INJURY!
The currency measuring ranges are protected against overload with ceramic fine-wire fuses. If
measuring in this range is no longer possible, you have to change the fuse.
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