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Model 6517B Electrometer Reference Manual
Section 6: Test sequences
Surface insulation resistance (SIR) test
This test is used to measure the insulation resistance between PC-board traces. The following figure
shows the connections and the equivalent circuit. Note that the drawing shows a "Y" test pattern for
the measurement. This is a typical test pattern for SIR tests.
When this test is run, a specified voltage (BIAS V) is applied to the test pattern for a specified time
(BIAS-TIME). This "bias" period is used to polarize the test pattern. The test voltage (MEAS-V) is then
applied and, after a specified time (MEAS-TIME), the Model 6517B measures the resistance and
stores the reading in the buffer.
This test is selected and configured from the CONFIGURE SEQUENCE menu (SIR).
Figure 74: Surface insulation test connections
6517B-901-01 Rev. C / August 2015
6-9
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