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When using the unit in schools and hobby-workshops the
usage and the measurement has to be controlled by the res-
ponsible teachers or skilled personell.
If covers are opened or parts are removed, except it is possible
without tools, voltage-carrying components may be
le. Terminals can also carry voltage. If it is necessary to open
the unit before adjustment, maintenance, repairing or exchan-
ge of parts or modules, the measuring unit has to be separa-
ted from all voltage sources and measuring circuits. Repairs or
maintenance to the measuring unit must only be carried out
by qualified service personell or qualified electricians who
know the dangers and the respective rules (VDE 0100,
0701, VDE-0683).
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Capacitors in the unit can still carry voltage, even if the unit
has been separated from all voltage sources.
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Use special caution when working with voltage above 25 V
(AC) and above 35 V (DC).
Such voltage might cause a life-dangerous electrical shock
when electrical conductors are touched.
First switch off voltage source, connect the measuring unit
with the terminals of the voltage source to be measured, set
the measuring unit to the necessary voltage range and after-
wards switch on voltage source.
After measurement has been finished, switch off the voltage
source and remove the measuring cables from the terminals of
the voltage source.
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Before changing the measuring range remove the probe tips
from the object to be measured.
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Control before each measurement the measuring
your test leads to make sure they are not damaged.
unit and
. Do not use this measuring unit in environments or rooms with
