Conrad VC444 Bedienungsanleitung Seite 6

Used batteries are to be treated as waste requiring
special handling and must therefore be disposed of
without harming the environment. Special collection
containers are provided for this purpose by specia-
list dealers and in scrap yards.
b) Changing the fuse
Make sure that only a fuse of the given type and no-
minal current rating is used as replacement. The
use of a repaired fuse or the bridging of the fuse
holder is not permitted.
To change the mA current input range fuse, disconnect the measu-
ring instrument from the circuit being measured and switch it off.
Remove all connected leads and test probes. Take a suitable
cross-head screwdriver and open the measuring instrument case
as described under "a) Inserting / changing the battery" above. Re-
move the defective fuse and replace this with an identical fuse with
0.3 A quick-blow 250V rating usually with the designation:
F0.3A/250V or F300mA/250V.
After having changed the fuse carefully close the measuring instru-
ment once more. Only put the measuring instrument into operation
again when the case is securely closed and screwed.
c) Connecting the instrument leads
Always use only the supplied test leads for measurements. Before
connecting, always check the condition of the connecting plugs
and test probes and check the insulation for damage.
The test leads are approved for voltages up to 600 V max. The
VC444 measuring instrument is designed for voltages up to 600
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VDC and VAC rms max., electrically isolated from AC mains, CAT I.
Take particular care when dealing with voltages greater than 25
VAC or 35 V DC.
Never exceed the maximum input levels, because
otherwise damage to the measuring instrument can
endanger life.
d) Putting into service
Basic setting
The measuring instrument is switched on by turning the rotary
switch away from the "OFF" position. When switching on, make
sure that the "Hold" button is not pressed in.
e) Connector and socket configuration
Transistor connector (hFE)
The 8-pin transistor connector is labelled symmetrically. Insert the
voltage-free transistor leads (B) base, (E) emitter and (C) collector,
as indicated, into the connector sockets. Take the pin configuration
for the various transistors from a transistor reference book.
f) Measuring function switch (rotary switch)
The rotary switch must not under any circum-
stances be moved while the instrument is connec-
ted with the object being measured, otherwise with
voltages greater than 25 VAC rms or 35 VDC the
measuring instrument can be destroyed and the life
of the user endangered.
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