Diode Test - VOLTCRAFT VC5070 Bedienungsanleitung

f) Diode test
Make sure that all circuit parts, switches, components and any other test objects are
currentless and discharged.
A diode test determines forward voltage and operating current of a diode (reverse direction IR, forward
direction IF).
For this measurement, proceed as follows:
- Use the rotary switch to select the measuring function "Ω" and
the measuring range according to your diode. Start with the
smallest range "x100k/1.5 µA". Switch to a higher value accord-
ingly (up to max. x1/150 mA).
- Connect the black measuring line with the COM socket (6) and
the red measuring line with the V/Ω socket (7).
- Now perform null balancing.
- Connect the two test prods with each other and wait until the
pointer has stabilised. A value of approx. 0 Ohm must be dis-
played. In case of a deviation, adjust the pointer to 0 Ohm using
the 0 Ohm calibration control (9).
- Now connect the two test prods with the test object (diode).
Always perform a measurement with reversed polarity as well.
- Read off the measured voltage (UF/UR) on the "LV" scale, the
unit being volt (V).
- The operating current (IF/IR) is displayed on the "LI" scale. The
unit corresponds to the chosen measuring range (µA/mA).
The operating current can be set from 1.5 µA to 150 mA. Caution! Excess current may
damage the component!
- If there is no display, the diode is measured in reverse direction or the diode is defective (break).
- After measuring, put the rotary switch in the "OFF" position to turn off the multimeter.
32