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Capacitors in the unit can still carry voltage, even if the unit has
been separated from all voltage sources.
•
Please make shure to use new fuses of the proper rating. Do not
use repaired fuses and do not bridge the fuse holders.
To exchange the fuse separate the measuring unit from the
measuring circuit and switch it off. Remove all connected cables
and measuring tips. Use a suitable crosspoint screw driver and
carefully open the cabinet. Remove the defective fuse(s) and
replace them with a new one of the same type and nominal
current 0.5 A ultra rapid, 250 V; usual name: FF 0.5 A/ 250 V or 20 A
ultra rapid, 250 VDC, usual name : FF20 A/250V.
After the fuse has been exchanged close the cabinet. Do not
operate the unit before it has been closed and screwed safely.
•
Use special caution when working with voltage above 25 V AC
and above 35 V DC.
Such voltage might already cause a life-dangerous electrical
shock when electrical conductors are touched.
First switch off the 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 afterwards
switch on the voltage source.
After measurement has been finished, switch off the voltage
source and remove the measuring cables from the terminals of
the voltage source.
However if the unit is operated below the first voltage-
range of 25 V ACrms, there is no danger of an electrical
shock when it is touched.
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Make shure before each voltage measurement the unit is not set
to the current measuring range.
•
Control before each measurement the measuring unit and your
test leads to make shure they are not damaged.
•
Do not use this measuring unit in environments or rooms with
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adverse environmental conditions where burnable gas, vapour or
dust is existing or might exist.
For your own safety avoid under all circumstances that the
measuring unit or the test leads become wet.
•
For measurement use only those test leads which are supplied
with the measuring unit. Only these are admissible.
•
To avoid an electrical shock, don't touch directly or indirectly the
test probes and the test points during measurement.
•
To avoid an electrical shock or damage do not apply more than
500 VDC/VAC between any terminal of the measuring unit and the
earth ground.
•
If there are doubts whether a safe usage is still possible the unit
has to be put out of operation and be secured against unintentional
use.
It must be assumed that a safe usage is not possible if
- the unit shows visible damage
- the unit does not work and
- after longterm storage under unfavourable conditions
or
- after transport strain
•
Don't switch on the measuring unit immediately after bringing it
in from a cold to warm room. Condensed water might impair or
destroy your unit. Give the unit time to warm up to room tempe-
rature without switching it on.
•
The influence of large HF-fields can cause the DMM to give
incorrect readings.
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