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24. MAINTENANCE AND CLEANING
General Information
To ensure 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 meter requires no servicing.
Notes on changing the battery and fuse are provided below.
Regularly check the technical safety of the device and measuring leads, e.g. check
for damage to the housing or squeezing, etc.
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 this can be done without tools).
The connected lines must be disconnected from the meter and all measuring
objects before the device is cleaned or repaired. Switch off the DMM.
Do not use any carbon-containing cleaning agents or petrol, alcohol or the like to clean the product.
They will damage the surface of the meter. Furthermore, the fumes are hazardous to your health and
explosive. Also do not use any sharp-edged tools, screwdrivers, metal brushes, etc. for cleaning.
Use a clean, lint-free, antistatic, slightly damp cloth for cleaning the device or the display and
the measuring leads. Allow the product to dry completely before you use it again to conduct
measurements.
Fuse replacement
Disconnect the product from the power source before opening the storage
compartment.
Disconnect the measuring leads from the product before opening the storage
compartment.
Never operate the meter when it is open. Danger to life!
Turn the two screws on top of the product from the position “CLOSE” to “OPEN” to unlock the storage
compartment.
Push the lever on the fuse compartment cover to the right to open the fuse compartment.
Replace the broken fuse with a new one of the same type. See the chapter technical data.
