Appendix C: Calibration and adjustment Series 2280 Precision DC Power Supply Reference Manual
C-4 077085503 / March 2019
Characterization shunts
Before performing calibration, you need to verify the value of the following shunts.
You can use the calibrated shunts, or you can use the following procedure to prepare your shunts:
Step 1: Verify the 5.05 Ω shunt
Step 2: Verify the 0.05 Ω shunt
Step 1
You can use 5 Ω and 0.05 Ω precision shunt resistors in series instead of the 5.05 Ω shunt resistor.
To verify the value, you need to make 4-wire sense connections between the shunts and the digital
multimeter (DMM).
Figure 112: Verify the precision shunt resistor
After connection, you can read the shunt value from the DMM (R
total
). Make sure the R
total
is within the
range of 5.05 ± 0.05 Ω. If it is not, adjust your shunts to guarantee the total shunt value is in the
required range.
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