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Chapter 1 Taking Measurements with the NI 4050
NI 4050 User Manual 1-8 www.ni.com
2. Select diode mode.
3. Select the range for your measurement. Only the 2 V range is available
for diode measurement.
The value indicator will indicate the voltage drop measured. If the display
indicates 2.200 VDC, the diode is either reverse biased or defective. See the
Diode Measurements section of Chapter 2, NI 4050 Operation, for more
information on diode measurements.
Measure Current
You can use the NI 4050 to measure current with an optional National
Instruments CSM series current shunt module. These accessories are
connected between the NI 4050 cable and the test probes as shown in
Figure 1-7.
Figure 1-7.
Connections for Current Measurement
Current shunt accessories contain a precision resistor that converts the
current through the shunt into a voltage that the NI 4050 can measure in
voltage mode. While the soft front panel cannot measure current directly
with the NI 4050, you can calculate the value of the current flowing through
the shunt by dividing the voltage measured by the value of the precision
resistor.
Current
Source
Current Shunt
Accessory
250 V
MAX.
LO
HI