Series 2280 Precision DC Power Supply Reference Manual
Appendix C: Calibration and adjustment
077085503 / March 2019
C-5
Step 2
To verify the 0.05 Ω precision shunt resistor, you need to measure two voltages:
Voltage
Description
V
total
The total voltage across the two shunts
V
0.05
The voltage across the 0.05 Ω shunt
Then calculate the value of the 0.05 Ω shunt using the following formula:
R
0.05
= V
0.05
* R
total
/ V
total
You need to connect the shunt with the power supply, electronic load, and digital multimeter. For
details, see the following figures. After you have made the connections, configure the settings for the
power supply and electronic load, as shown in the following table.
Measure step Power supply
Electronic load
V
total
1.0 V, 0.2 A, constant voltage mode
2.0 V, 0.2 A, constant current mode
V
0.05
1.0 V, 0.2 A, constant voltage mode
2.0 V, 0.2 A, constant current mode
Figure 113: Measure the voltage across the shunts
