Keysight 34450A Guia Del Usuario página 103

Measurement Tutorial 3
Considering the internal resistance and external lead resistance total is
0.0125 ohm. If applying a 1 A DC current, an error of (0.0125 ohm x 1 A) 0.0125 V
or 12.5 mV will occur. This error will be relative by range with the ADC dynamic
range of 1.2 V.
Figure 3-4 Example of measuring voltage and current in dual measurement
The error in measurement will be significant when applying a higher current.
Keysight 34450A User's Guide 103