3458A Datasheet, PDF (13/27 Pages) Keysight Technologies – Shattering performance barriers of speed and accuracy

Section 3: DC Current
Measurement Considerations
Keysight recommends the use of PTFE cable or other high
impedance, low dielectric absorption cable for low current
measurements. Current measurements at rates < NPLC 1
are subject to potential noise pickup. Care must be taken
to provide adequate shielding and guarding to maintain
measurement accuracies.
13