Chapter 6 VirtualBench-DMM
Getting Started with VirtualBench 6-2 www.ni.com
The front panel of VirtualBench-DMM has the following features:
• Measurement Display—Displays measurements.
• Function Selector—Selects which measurement mode you want to
use. The modes, from left to right, are as follows:
– Volts AC—Measures the AC component of a voltage signal.
– Volts DC—Measures the DC component of a voltage signal.
– Current AC—Measures the AC component of a current source.
– Current DC—Measures the DC component of a current source.
– Ohms—Measures resistance.
– 4-Wire Ohms—Measures resistance using four-wire method.
– Diode—Measures the voltage drop across a diode.
– Temperature—Measures temperature.
• Resolution Control—Selects the number of digits of resolution.
• Range Selector—Determines the measurement range. This range is
different for each measurement mode. AutoRange mode selects the
best range to fit the input signal.
• Main Control Buttons
– Run—Starts or stops the DMM acquisition.
– Single—Acquires a single measurement.
– Log—Enables logging.
• Math Control Buttons
– Null—Selects relative mode. When you click this button, all
subsequent measurements become relative to the measurement
made when you pressed this button.
– Max/Min—Displays the maximum and minimum values since
you first clicked the button.
– mX+B—Manipulates normal display readings (X) according to
the calculation mX+B.
– dB—Displays the decibel value of your signal.
– dBm—Displays the decibel power level with respect to 1 mW.
– %—Displays the current value as a percentage of a reference.
Note Refer to the VirtualBench-DMM Online Reference for more information about the
front panel items.
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