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- 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.
Proceed as described above to measure alternating currents.
Alternate current measuring is only possible with the VC170!
Select the desired measuring range and press the button “SELECT” (3) to switch to the AC range. “AC”
appears on the display.
Pressing this button again, takes you back etc.
After measuring, remove the measuring leads from the measuring object and turn the DMM off. Turn the
rotary switch to “OFF”.
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Do not measure any currents above 10 A in the 10Arange and no currents above 400
mAin the mA/µA range, otherwise the fuses trigger.
c) Frequency measuring and duty cycle (only VC170)
The VC170 can be used to measure and indicate signal voltage frequencies from 10 Hz up to 10 MHz.
Measuring socket selection and assignment of the black and red measuring cable
DMM black red
VC170 COM (5) V/Hz (8)
Proceed as follows to measure frequencies:
- Turn the DMM on at the rotary switch and select measuring range “Hz/%”.
- Plug the red measuring lead into the Hz measuring socket and the black measuring lead into the
COM measuring socket.
- Now connect the two measuring prods to the object to be measured (signal generator, switch etc.).
- The frequency and corresponding unit are displayed.
- After measuring, remove the measuring leads from the measuring object and turn the DMM off. Turn
the rotary switch to “OFF”.
Proceed as follows to measure the pulse-pause ratio (duty cycle):
- Connect the DMM as described for frequency measuring and select the measuring range “Hz/%”.
- Press the button “SELECT”. The pulse/break ratio is displayed in %.
- After measuring, remove the measuring leads from the measuring object and turn the DMM off. Turn
the rotary switch to “OFF”.
