Keysight U3606B, Service Manual

Page: 62 / 123

1 Calibration Procedures
62 Keysight U3606B Service Guide
Additional Verification Tests
Optional capacitance gain verification test
1 Connect the calibrator to the front panel (red) and LO (black) input
terminals (see Figure 1-3, “Test setup for capacitance gain verification,” on
page 29).
2 Press [ ] to select the capacitance function.
a For ranges lower than 1.000 µF, please perform Null at the
device-under-test (DUT) before recording the final measurement. This will
compensate the capacitance errors present in the test leads and terminals
of the Fluke 5520A calibrator.
b Output 190 pF (equivalent to 0.19 nF) from the Fluke 5520A Calibrator
( NORMAL HI+LO ) to the DUT terminals ( V + LO ). The lowest capacitance
value that can be sourced from the Fluke 5520A calibrator is 190 pF.
c Select the desired range to perform measurement; as an example, for the
10.00 nF range, set measurements to continuous auto trigger, and then
press [Null] to perform the Null offset.
d Press [Null] again to edit the Null offset value.
e Deduct the Null value displayed on the DUT's front panel with 190 pF
(equivalent to 0.19 nF) using the arrow keys and press [Shift] > [Save] to
save the new Null offset value.
f Perform the subsequent measurements in the desired active range as
selected in step c with the new edited Null offset value saved in the DUT.
3 Please repeat steps in step a to step e for any change of ranges that is lower
than 1.000 µF.
Table 1-22 Optional capacitance gain verification test
Input capacitance Range Error from nominal 1-year
1 nF 1 nF ±0.028 nF
10 nF 10 nF ±0.15 nF
100 nF 100 nF ±1.5 nF
1 μ F 1 μ F ±15 nF