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f) Diode Test
ƽ
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 “SELECT” on the VC270 and VC290 to switch the measurement
function. The diode symbol appears in the display. Pressing this button
again takes you to the next measuring function.
- Plug the red measuring lead into the Ω measuring socket (7) and the
black measuring lead into the COM measuring socket (8).
- Check the measuring leads for continuity by connecting both measuring
probes with one another. The value must be approximately 0 V.
- Now connect the two measuring probes with the object to be measured
(diode).
- 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.
- After measuring, remove the measuring leads from the measured object and turn the DMM off.
g) Continuity Check
ƽ
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 or
- Press “SELECT” twice on the VC270 and VC290 to switch the measure-
ment function. The symbol for continuity check now appears in the dis-
play. Pressing this button again takes you to the first measuring function
etc.
- Plug the red measuring lead into the Ω measuring socket (7) and the
black measuring lead into the COM measuring socket (8).
- Acontinuity value of less than 10 Ohm is identified as continuity; in this
case a beep sounds.
- If “OL” (overload) or 1 appears on the display, you have exceeded the
measuring range or the measuring circuit has been broken.
- After measuring, remove the measuring leads from the measured object and turn the DMM off.
