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Voltcraft VC100 serie Manual

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- A measuring value of approx. < 10 Ohm is detected for the throughput and a permanent signal
sounds.
- As soon as “OL” (overload) appears on the display, you have exceeded the measuring range or the
measuring circuit has been interrupted.
- After measuring, remove the measuring leads from the measuring object and turn the DMM off. Turn
the rotary switch to the position “OFF” or turn the device off via the “POWER” switch.
g) No-contact voltage test “NCV”
ƽ
Make sure that all measuring sockets are unoccupied. Please remove all measuring
leads and adapters from the measuring device.
This function only serves as aid. Prior to performing work on these cables, you have
to perform contact measuring operations to check for the absence of voltage.
- Turn the DMM on and select measuring range “NCV”
- Test this function beforehand on a known AC voltage source.
- Guide the measuring device with the sensor area (1) towards to position to be tested at a distance of
max. 10 mm. In case of twisted cables, it is recommended to check the cable at a length of approx.
20 to 30 cm.
- In case voltage is detected, a signal sounds and the display shows “000”
- After you finish measuring, turn the DMM off. Turn the rotary switch to the position “OFF” or turn the
device off via the “POWER” switch.
☞
Due to the sensitivity, static fields may also be displayed when touching. This is normal and
does not influence the test result.
h) Transistor test “hFE”
ƽ
Transistor tests can only be performed with the optionally available measuring
adapter. No voltage may be applied and measured on the adapter.
- Turn the DMM on and select measuring range “hFE”
- Disconnect all measuring leads from the measuring instru-
ment.
- Attach the optionally available measuring adapter to the three
measuring sockets COM (5) + V (8) + mA(7)
- Insert the transistor to be tested into the corresponding header
observing the correct polarity. The left header is intended for
NPN types and the right header for PNP types. SMD types can
also be tested.
- The amplification factor “hFE” is displayed
- After measuring, remove the adapter and turn the DMM off.
Turn the rotary switch to the position “OFF” or turn the device
off via the “POWER” switch.
… 37 …


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