11. MAINTENANCE AND CLEANING
a) General information
To ensure accuracy of the multimeter over an extended period of time, it should be calibrated once a year.
Apartfromoccasionalcleaningandfusereplacements,themeterrequiresnoservicing.
Notes on changing the battery and fuse are provided below.
Regularly check the technical safety of the device and measuring lines, e.g. check for damage to
the casing or squeezing, etc.
b) Cleaning
Always observe the following safety information 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
thesurfaceofthemeter.Furthermore,thefumesarehazardoustoyourhealthandexplosive.Alsodonotuseany
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 lines.
Allow the product to dry completely before you use it again to conduct measurements.
c) Opening meter
The battery and fuse compartment (13) must only be opened after all measuring lines were discon-
nected from the meter.
The casing design only permits access to the battery and fuse
even when the battery and fuse compartment is opened. The
casing no longer has to be opened and disassembled com-
pletely. These measures improve user safety and operational
comfort.
Proceed as follows to open it:
- Disconnect all measuring lines from the meter and switch it
off.
-
Remove the rubber protection cover from the device carefully.
- Loosen and remove the rear battery compartment screw and
remove the battery compartment lid.
- The fuses and the battery compartment can be accessed
now.
- Close the casing again in the reverse order and screw the
battery and fuse compartment closed.
- The meter is ready for use once again.
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