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Voltcraft VC155 Manual

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f) Non contact voltage test “NCV”
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.
1. Turn the DMM on and select measuring range “NCV” with the rotary switch (5). You will see the
word “NCV” on the display (4).
2. Test this function beforehand on a known AC voltage source.
3. Guide the measuring device with the sensor area (3) towards to position to be tested at a distance
of max. 5 mm. In case of twisted cables, it is recommended to check the cable at a length of
approx. 20 to 30 cm.
4. In case voltage is detected, the will be an acoustic signal.
5. After you nish measuring, turn the DMM off. Turn the rotary switch to the position “OFF”.
g) Temperature measuring (only in VC155)
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.
1. Turn the DMM on and select measuring range “°C” with the rotary switch (5).
2. Disconnect all measuring leads from the measuring instrument.
3. Connect the enclosed temperature sensor to the DMM while observe the correct polarity. The
TEMP (+) terminal must be inserted into the ºC socket (8) and the COM (-) terminal must be
inserted into the COM socket (9).
4. Now expose the sensor tip to the temperatures.
5. The display shows the temperature on the sensor. The unit of the measured value is “ºC”. If “1”
(towards the left side of the display) is shown, the measuring range was exceeded or there is no
sensor connected.
6. After measuring, remove the adapter and turn the DMM off. Turn the rotary switch to the position
“OFF”.
HOLD FUNCTION
The HOLD button (1) allows you to hold the measuring value on the display. The symbol “ ” appears
on the display. This facilitates reading, e.g. for documentation purposes. Another press will switch
back to measuring operation again.
… 33 …


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