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11. Cleaning and Maintenance
a) General
To ensure accuracy of the multimeter over an extended period of time, it should be calibrated once a year.
Apart from occasional cleaning and battery replacements, the meter requires no servicing.
Notes on replacing the battery 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 abrasive 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 lines.
Allow the product to dry completely before you use it again to conduct measurements.
c) Inserting and Changing the Batteries
The multimeter is operated with three 1.5 Volt micro batteries (e.g. AAA or LR03). You need to insert a new, charged
battery before initial operation or when the battery change symbol
Proceed as follows to insert or change the batteries:
- Disconnect the connected measuring lines from the measuring circuit and the
meter. Switch off the DMM.
- Loosen the rear screw at the battery compartment lid with a matching Phillips
screwdriver. The screw cannot be removed entirely. Remove the battery compart-
ment lid from the device.
- Replace all flat batteries with new one of the same type. Insert the new batteries in
the battery compartment (12) observing the correct polarity. Observe the polarity
as indicated in the battery compartment.
- Close the casing carefully again.
46
appears on the display.
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