Fluke 725Ex - Cal Ohms Low Source

725Ex
Calibration Manual
38
Cal Ohms Low Source
The UUT connection is the same as cal Ohms Hi Source, it is shown in Figure 20.
From the Calibration Menu, enter the cal step for Cal Ohms Low Source. The PC
displays:
2500 into DAC. Enter Ohms displayed :
Set the HP 3458 to read 4 terminal Ohms. Be sure the NPLC on the HP 3458 is slow
enough to get stable readings. When the reading on the HP 3458 has stabilized, enter the
value in Ohms on the PC, then press Enter. After a short while, the PC displays:
Max value into DAC. Enter Ohms value displayed :
Enter the resistance reading from the HP 3458 in the PC, then press Enter. After a short
while, the PC displays the following calibration constants and new prompt:
Gain = 0.006910
y intercept = -57
= 451.459980 - 17.670000 )/ 65279.00 - press space bar to continue
Press the space bar to return to the Calibration menu.