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9. OPTINAL MAINS UNIT OPERATION
The measuring device may be operated both with batteries and an optional mains unit. Mains unit
operation is suitable for long-term measurements or continuous operation.
The mains unit can be connected to the side of the mains unit socket (16). When connecting a mains
unit, automatic deactivation is deactivated; the display symbol (D) goes out. Mains unit operation is
displayed by the symbol “Ext-Power”.
Batteries in the measuring device do not need to be taken out. Switching from battery to mains unit
operation is performed automatic and without interruption of measured value operation.
The following prerequisites are required for the mains unit:
Output voltage:
12 V/DC
Output current:
at least 500 mA
Hollow plug:
5.0 x 2.1 mm (outer/inner Ø)
Polarity
Inner plus pole
Observe the safety notes of the mains unit.
10. CLEANING AND MAINTENANCE
10.1. GENERAL
To ensure accuracy of the multimeter over an extended period of time, it should be calibrated once a
year in a calibration lab.
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.
10.2. 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 device.
