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j) Capacity Measuring
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Make sure that all the circuit parts, switches and components and other objects of
measurement are disconnected from the voltage and discharged.
With electrolyte capacitors, ensure that you observe the polarity.
- Switch on the DMM and select measuring range
.
- Plug the red measuring lead into the V measuring socket (7) and the
black measuring lead into the COM measuring socket (8).
- The display shows the unit “nF”.
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Due to the sensitive measuring input, the display may show a
value in case of “open” measuring lines. By pressing the button
“REL”, the display is set to “0”. The Auto range function
remains active.
- Now connect the two test prods (red = positive pole/black = negative pole) with the object to be mea-
sured (condenser). After a short while the display shows the capacity. Wait until the displayed value
has stabilised. With capacities of >40 µF, this may take a few seconds.
- If “OL” (overload) appears on the display, you have exceeded the measuring range.
- After measuring, remove the measuring lines from the measured object and turn the DMM off.
REL Function
The REL function allows a reference value measurement to avoid possible line losses which may caused
e.g. during resistance measurements. For this purpose, the current indicated value is set to zero. A new
reference value is set.
Press the “REL” button to activate this measuring function. The display indicates “ “. The automatic
measuring range selection is deactivated now (except for capacity measuring range).
To deactivate this function, switch the measuring function.
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The REL function is not active in the frequency measuring range and for the high-
impedance resistance measuring range, diode tests and continuity tests.
