VOLTCRAFT VC650BT Mode D'emploi page 56

When a minus "-" appears in front of the measured value when measuring direct current, the
current has the opposite direction (or the measuring leads have been swapped).
4. After measuring, remove the measuring leads from the measured object and turn off the DMM.
Proceed as follows to measure alternating current "AC" (A ~ ):
1. Switch on the DMM and select measuring range "A
about the measured range, start with a larger range ("A
switch to the function "A ~", "mA ~" or "µA ~". The indication "AC" and "TrueRMS" show on the display.
Measuring function
A ~
mA ~
µA ~
2. Depending on the measuring function chosen, plug the red measuring lead into the 10A measuring
jack (20) / mAµA measuring jack (19) and the black measuring lead into the COM measuring jack (18).
3. Now connect the two test prods in series with the object to be measured (generator, circuit, etc.); the
display indicates the polarity of the measured value together with the currently measured value.
4. After measuring, remove the measuring leads from the measured object and turn off the DMM.
Frequency measuring / signal ratio in % (duty cycle)
The DMM can be used to measure and indicate signal voltage frequencies from 0.001 Hz to 400 MHz.
Proceed as follows to measure frequencies:
1. Switch on the DMM and select measuring function "%".
2. Plug the red measuring leads into the
measuring lead into the COM measuring jack (18).
3. Connect the two measuring leads to the object to be measured (signal generator, circuit, etc.).
4. The frequency and corresponding unit are displayed.
5. Press the SHIFT / SLEEP button (16) until the display indicates "%" to measure the signal ratio
(duty cycle).
6. After measuring, remove the measuring leads from the measured object and turn off the DMM.
Impedance measuring
Make sure that all the circuit parts, switches and components and other objects of
measurement are disconnected from the voltage and discharged.
Measuring range
0.001 – 10 A
0.001 – 400 mA
0.01 – 4000 µA
V
", "mA " or "µA
"). Press the SHIFT / SLEEP button (16) to
Measuring jacks
COM + 10A
COM + mAµA
COM + mAµA
°CHz measuring jack (17) and the black
". If you are not sure
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