Model 3761 10-Channel Low Current Multiplexer Card User's Manual
Section 5: Typical applications
3761-900-01 Rev. B
/
January 2018
5-3
Figure 6: Direct capacitor insulation leakage measurement
To make a measurement using the direct method:
1. Make sure that your Model 3761 is in ampere mode.
2. Close the correct channels on the 3762 to charge the capacitor under test.
3. When the capacitor is charged, close the applicable channel of the 3761 to start the
measurement.
The current is measured at IM, as shown in the previous figure. To maintain the voltage
applied to the capacitor under test, be sure to keep the applicable channel of the 3762 closed
when making the measurement.
4. When the test is complete, open the channels on the 3761 and 3762. The charge on the
capacitor under test is released automatically through the discharge resistor.
5. Repeat the previous steps for each capacitor under test.
