Keysight 3458A - 2-Wire Ohms Function Offset Test; 4-Wire Ohms Function Offset Test (Rear Terminals)

Performance Verification Tests 4
Keysight 3458A Calibration Manual 73
–OCOMP ON
–Trig SGL
7 Configure the DMM under test as follows:
–OHM
–NDIG 8
– NPLC 100
–OCOMP ON
–Trig SGL
2-wire ohms function offset test
The following procedure performance verifies the front terminal ohms offset.
1 Connect a low thermal short across the front panel HI and LO input terminals
of the 3458A under test as shown in Figure 3-1 on page 39.
2 Set the 3458A under test to the 10 Ω range. Allow 5 minutes for the range
relays to thermally stabilize.
3 Execute Trig and use the OHMS TESTS Test Card to record the offset reading.
4 Remove the short from the front panel input terminals.
4-wire ohms function offset test (rear terminals)
This procedure performance verifies the rear terminal ohms offset.
1 Connect a low thermal short across the rear terminals of the 3458A as shown
for the front terminals in Figure 3-1 on page 39.
2 On the 3458A under test, select 4-wire ohms and the 10 W range by executing
OHMF, 10.
3 Execute Trig and use the OHMS TESTS Test Card to record the offset reading.
4 Remove the short from the rear panel input terminals.