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9. Cleaning and maintenance
a) General
To ensure the accuracy of the measuring device over an extended period of time, it should be calibrated once a year.
Apart from occasional cleaning and fuse replacements, the measuring device requires no servicing.
See the next chapter for information on battery and fuse replacement.
Regularly check the technical safety of the device and measuring lines, e.g. check for damage to
the housing, the insulation or squeezing etc.
b) Cleaning
Always observe the following safety instructions before cleaning the device:
Live components may be exposed if covers are opened or parts are removed (unless these parts
are intended to be removed without tools).
Before cleaning or repairing the device, connected lines must be disconnected from the measuring
device and from any test objects. Switch off the measuring device.
Do not use agents containing carbon, benzine, alcohol or similar substances to clean the device. They corrode the
surface of the measuring device. In addition, the vapours are detrimental to health and explosive. Sharp-edged tools,
screwdrivers or metal brushes should not be used for cleaning purposes.
Use a clean, lint-free, antistatic and slightly moistened cloth to clean the device, the display and the measuring lines.
Allow the product to dry completely before you use it again to carry out measurements.
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