Fluke 5520A Service Manual page 81

Proceed as follows to calibrate the capacitance function:
1. Connect the UUT to the LCR meter using the Fluke PM 9540/BAN cables as shown
in Figure 3-14. These special cables eliminate the need for a four-wire connection.
Make sure there are no other connections to the 5520A, especially the SCOPE
BNC. Connecting any additional grounds to the 5520A can cause erroneous
capacitance outputs.
2. Select the frequency on the LCR meter per table 3-17.
3. Measure and enter the values into the UUT for the calibration steps in Table 3-17 as
prompted. The right column in the table shows the best stimulus frequency for each
calibration point.
4. Verify that the UUT is in Standby and disconnect the LCR meter.
Table 3-17. Calibration Steps for Capacitance
Step
5520A Calibration Output
1
2
3
4
5
6
7
8
9
10
11
12
Note
5520A Output (NORMAL)
200 pF
0.5000 nF
1.1000 nF
3.5000 nF
11.0000 nF
35.000 nF
110.000 nF
0.35000 F
1.10000 F
3.3000 F
11.0000 F
33.000 F
Calibration and Verification
Best Stimulus Frequency
1 kHz
1 kHz
1 kHz
1 kHz
1 kHz
1 kHz
1 kHz
100 Hz
100 Hz
100 Hz
100 Hz
100 Hz
3
Calibration
3-25