Chapter 6 VirtualBench-DMM
Getting Started with VirtualBench 6-4
©
National Instruments Corporation
c. Click on Run. VirtualBench-DMM continuously acquires and
displays voltage measurements in the display window.
d. Check to see that the input signal does not exceed the range of
your DAQ device, and that the input signal does not exceed the
selected range, when the DMM display shows +CLIP or -CLIP.
e. Click on Run again to stop the measurement.
3. Measure current. VirtualBench-DMM requires the use of a
precision external shunt resistor to measure current.
a. Connect a precision shunt resistor across the input of the
Channel that you specified in step one. See the user manual of
your DAQ device for details.
b. Connect your current signal to the same terminals.
c. Select Settings from the Edit menu on the front panel.
d. Select the Current and Resistance tab.
e. Enter the value of the shunt resistor that you placed across the
channel specified in step one input of your DAQ device.
f. Click on OK.
g. Click on the third (IDC) or fourth (IAC) button in the Mode
Selector, depending on which type of voltage you connected in
substep "b" of step three.
h. Click on Run. VirtualBench-DMM continuously acquires and
displays current measurements in the display window.
06Chap06.fm Page 4 Friday, February 28, 1997 3:22 PM