Keithley 2280 Series - Characterization Shunts

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.
Shunt value
Tolerance
Calibration use
0.05 Ω
± 0.0005 Ω
High current calibration
5.05 Ω
± 0.05 Ω
Low current calibration
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.