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© National Instruments Corporation vii NI 4050 User Manual
Contents
Chapter 1
Taking Measurements with the NI 4050
Cable and Probes ...........................................................................................................1-1
Introduction to the VirtualBench-DMM Soft Front Panel.............................................1-3
Use the Soft Front Panel ................................................................................................1-5
Measure DC and AC Voltage..........................................................................1-5
Measure 2-Wire Resistance.............................................................................1-6
Measure the Voltage Drop Across a Diode.....................................................1-7
Measure Current..............................................................................................1-8
Measure Temperature......................................................................................1-9
Chapter 2
NI 4050 Operation
Safety Instructions .........................................................................................................2-1
Measurement Fundamentals ..........................................................................................2-2
Warm Up .........................................................................................................2-2
Selecting the Resolution..................................................................................2-2
Grounding........................................................................................................2-2
Voltage Measurements ..................................................................................................2-2
DC Voltage......................................................................................................2-2
Input Ranges .....................................................................................2-3
Measurement Considerations............................................................2-3
Input Impedance .................................................................2-3
Thermal EMF .....................................................................2-4
Noise Rejection...................................................................2-4
AC Voltage......................................................................................................2-6
Input Ranges .....................................................................................2-7
Measurement Considerations............................................................2-7
AC Offset Voltage..............................................................2-7
Frequency Response...........................................................2-7
Resistance Measurements..............................................................................................2-8
2-Wire Resistance Measurements ...................................................................2-8
Input Ranges .....................................................................................2-8
Continuity Measurements................................................................................2-9
Diode Measurements .....................................................................................................2-9