Front Terminal Offset Adjustment - Agilent Technologies 3458A Calibration Manual

Front Terminal Offset Adjustment

Figure 1. 4-Terminal Short
This adjustment uses an external 4-terminal short. The multimeter makes
offset measurements and stores constants for the DCV, DCI, OHM, and
OHMF functions. These constants compensate for internal offset errors for
front terminal measurements.
Equipment required: A low-thermal short made of 12 or 14 gauge solid
copper wire as shown in Figure 1.
1. Make sure you have performed the steps described previously under
"Preliminary Adjustment Procedures".
2. Connect a 4-terminal short across the front panel HI and LO Input
terminals and the HI and LO W Sense terminals as shown in
Figure 1.
3. After connecting the 4-terminal short, allow 5 minutes for thermal
equilibrium.
Chapter 3 Adjustment Procedures 23