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The voltage between the two measuring contacts of the
measuring device and the earth may not exceed 250 V
DC/AC in overvoltage category III or 250 V DC/AC in
overvoltage category II.
Before changing the measuring area, the test prods
have to be removed from the measured object.
Take particular care when dealing with voltages excee-
ding 25 V AC or 35 V 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 indi-
rectly, 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 device
or the measurement lines switches 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 electromagnatic fields
- transmitting aerials or HF generators.
These could falsify the measured value.
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