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Chapter 1 Taking Measurements with the NI 4050
NI 4050 User Manual 1-4 www.ni.com
The Function selector allows you select a measurement mode. Select
Edit»Settings and click on the tabs for Current and Resistance or
Temperature to control the data type acquired by VirtualBench-DMM.
DC volts measures the DC component of a voltage signal.
AC volts measures the AC component of a voltage signal.
DC current measures the DC component of a current source.
AC current measures the AC component of a current source.
2-wire measures resistance using the 2-wire method.
4-wire measures resistance using the 4-wire method.
Diode measures the voltage drop across a diode. The maximum voltage
VirtualBench-DMM measures is 2 V.
Temperature measures temperature.
The run button starts and stops continuous DMM measurements.
The single button performs a single measurement.
The math buttons allow you to manipulate readings mathematically.
Null starts relative mode. VirtualBench-DMM makes all subsequent
measurements relative to the measurement it makes when you click
on Null.
Max/Min displays the maximum and minimum values that occur after you
start Relative mode.
mX+B enables the mX+B calculation on all readings.
dB compresses a large range of measurements into a much smaller range
by expressing DC or AC voltage in decibels.
dBm shows decibels above or below a 1 mW reference.