Diode Test; E) Capacity Measuring - VOLTCRAFT LCR-100 Bedienungsanleitung

d) Diode test
Make sure that all the circuit parts, switches and components and other objects of measurement
are disconnected from the voltage and discharged.
- Turn the DMM on and select measuring range
- Press the button "
appears on the display. Pressing this button again takes you to the first measuring
function etc.
- Plug the red measuring lead into the Ω measuring socket "+" (9) and the black
measuring lead into the Ω measuring socket."-" (8).
- Check the measuring leads for continuity by connecting both measuring prods with
one another. After that the value must be approx. 0 V.
- Now connect the two measuring prods with the object to be measured (diode).
- The display shows the continuity voltage "UF" in volt (V). If "OL" is indicated, the
diode is measured in reverse direction (UR) or the diode is defect (interruption).
Perform a counter-pole measuring for control reasons.
- After measuring, remove the measuring leads from the measuring object and turn
the DMM off.
Silicone diodes have an on-state voltage (UF) of approx. 0.4 – 0.9 V.

e) Capacity measuring

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, observe the polarity under all circumstances!
- Turn the DMM on and select measuring range "CAP"
- Plug the red measuring lead into the CAP measuring socket "+" (9) and the black
measuring lead into the CAP measuring socket."-" (8).
- The display shows the unit "nF".
Due to the sensitive measuring input, the display may show a value in case
of "open" measuring leads. This does not impair the measuring accuracy.
- Now connect the two test prods (red = positive pole/black = negative pole) with
the object to be measured (condenser). After a short while the display shows the
capacity. Wait until the display has stabilised. With capacities of >40 µF, this may
take a few seconds.
- If the capacitor was not completely discharged, the display shows "dSC". An inte-
grated discharge circuit slowly discharges the component. Discharge the capacitor
manually or wait until this display disappears and the measuring value is indicated.
- As soon as "OL" (overload) appears on the display, you have exceeded the measuring range.
- After measuring, remove the measuring leads from the measuring object and turn the DMM off.
28
" (4) to switch the measuring function. The diode symbol