Conrad F 113 Bedienungsanleitung Seite 9

AC-coupled. In DC voltage measurement, if a „−" is displayed in
front of the measurement value, the voltage measured is nega-
tive (or the measuring leads have been inadvertently reversed).
5.4 Resistance Measurement and Continuity Check
Important!
Make absolutely sure that there is no voltage across any of the
circuit components, circuits, and measurement objects you are
measuring.
You can use this function to test no-load cables, fuses, circuit,
etc., for continuity acoustically. Carry out the measurement as
follows:
a) Please observe Section 5.3.1 of these instructions (connec-
tion of measuring leads). Set the measurement function
switch to „400". Manual range selection is not possible.
b) Next, connect the measurement probes to the measurement
object. If the through resistance is less than 15 Ω there is an
acoustic signal. In the continuity check, cable resistances of
no-load cables up to 400 Ω can be checked/measured. The
resistance value in the display always relates to the measu-
rement section (circuit paths/components) between the test
probes. It can thus happen that you do not measure the resi-
stance value of the resistance built into the circuit corre-
sponding to the color code (color rings) of this resistance.
Important!
When measuring resistances built into circuits including Si-tran-
sistors/diodes, the test voltage of the 400 Ω range is sufficient to
switch this semi-conductor. This may result in errors in the mea-
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surement values.
The resistance of the measuring leads is normally negligibly small
(approx. 0.1 to 0.2 Ω). However, this low value, even in the 400 Ω
range, may lead to inaccuracies.
When carrying out measurement of resistances, make sure that
the measurement points you touch are free of dirt, oil, soldering
material, or similar, as such impurities can result in errors in the
measurement.
If „OL" is displayed, you have exceeded the measurement range,
or the measurement section has been interrupted.
Important!
Never measure loaded capacitors. This could irreparably damage
your device through a possible discharge.
400 V
AC
red measuring
line
black measuring line
parallel connecting points
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