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Proceed as follows to measure impedance:
1. Switch on the DMM and select measuring range “
ȍ
”.
2. Plug the red measuring leads into the
V
ȍ
°CHz measuring jack (17) and the black
measuring lead into the COM measuring jack (18).
3. Check the measuring leads for continuity by connecting both measuring probes with one another.
The impedance value must be approximately 0 - 1.5
ȍ
(inherent impedance of the measuring
leads). For low-impedance measurements, press the button “REL/PC” (4) to not include the
inherent impedance of the measuring leads in the following impedance measurement. The
display shows the delta symbol and 0
ȍ
are indicated. The automatic range selection (AUTO) is
deactivated. The basic value (rel difference) is displayed in the upper, small display.
4. Now connect the two measuring leads to the object to be measured.
5. As long as the object to be measured is not high-impedance or interrupted, the measured value
will be indicated on the display. Wait until the displayed value has stabilised. With impedances of
>1 M
ȍ
, this may take a few seconds.
6. If “OL” (overload) appears on the display, you have exceeded the measuring range or the
measuring circuit is interrupted. Pressing the “REL” button again switches off the relative function
and activates the autorange function.
7. After measuring, remove the measuring leads from the measured object and turn off the DMM.
If you carry out a impedance measurement, make sure that the measuring points you touch
with the test probes are free from dirt, oil, solderable lacquer or similar. Such circumstances
can falsify the measured result.
Diode test
Make sure that all the circuit parts, switches and components and other objects of
measurement are disconnected from the voltage and discharged.
1. Switch on the DMM and select measuring function “
ȍ
”. Press the SHIFT / SLEEP button (16) to
switch to
. The diode symbol is displayed.
2. Plug the red measuring lead into the
V
ȍ
°CHz measuring jack (17) and the black
measuring lead into the COM measuring jack (18).
3. Check the measuring leads for continuity by connecting both measuring leads with one another.
The value must be approximately 0.0000 V.
4. Now connect the two measuring leads with the object to be measured (diode).
5. The display shows the continuity voltage “UF” in volt (V). If “OL” appears, the diode is measured
in reverse direction (UR) or the diode is faulty (interruption). Perform a counter-pole measurement
to check.
6. After measuring, remove the measuring leads from the measured object and turn off the DMM.
