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In commercial institutions, the accident prevention regulations of the Employer’s Lia-
bility Insurance Association for Electrical Systems and Operating Materials are to be
observed.
In schools, training centres, computer and self-help workshops, handling of measu-
ring instruments must be supervised by trained personnel in a responsible manner.
Always make sure before measuring voltages that the measuring instrument is not
set to a current measuring range.
The voltage between any socket of the measuring instrument and the ground may
not be higher than 500V DC/AC.
Before changing the measuring range, the test prods have to be removed from the
measured object.
Take particular care when dealing with voltages exceeding 25V AC or 35V DC! Even
with voltages as low as these, it is possible to receive a life-threatening electric
shock if you touch electric conductors.
Prior to each measurement, check your instrument including its measuring lines for
damage. Never carry out measurements when the protective insulation is damaged
(ripped, torn off etc.).
In order to avoid an electric shock, ensure that you do not touch the connections to be
measured, even indirectly, during measurements.
Do not use the clamp-on ammeter just before, during or just after an electrical storm
(electrical shock! / high-energy over-voltages!). Please make certain that your hands,
shoes, clothing, the floor, the measuring instrument or the measurement lines swit-
ches and switching parts are absolutely dry.
Do not operate the measuring instrument in areas or unfavourable conditions where
combustible gases, vapours or dust are or may be present. Avoid operation in the
immediate vicinity of:
- strong magnetic or electromagnetic fields
- transmitting aerials or HF generators.
These could falsify the measured value.
For safety reasons, when measuring only use the supplied measuring cables which
are adjusted to the specifications of the multimeter.
If you have reasons to assume that safe operation is no longer possible, then dis-
connect the appliance immediately and secure it against inadvertent operation.
