Fluke 724 - Calibrating High Ohms Source

724/725/726
Calibration Manual
62
Calibrating High Ohms Source
Connect the UUT as shown in Figure 31.
aal13f.eps
Figure 31. High Ohms Source Calibration Connections
After making the proper connections, type “8” then press the Enter key on the PC
keyboard. Input directions are displayed at the bottom of the calibration menu:
Enter Selection:
First Calibration Point. Enter Ohms displayed:
Second Calibration Point. Enter Ohms displayed
The 8508A should be locked in the 20 kΩ range (0.1 mA excitation). Enter each of the
two calibration points as prompted.
Note
For best accuracy set to:
1500 Ohms: Use 8508A 2 k
Ω range, 4-wire, LOI On
3200 Ohms: Use 8508A 20 k
Ω range, 4-wire, LOI Off