To Next Page

To Previous Page

Amps Measurements 4-15

Surface insulation resistance (SIR)

NOTE For this test, Model 6514 uses the source voltage, measure current method to

determine resistance. Once a current measurement is performed, resistance can be

calculated.

Figure 4-9 shows how to measure the insulation resistance between PC board traces. Note

that the drawing shows a "Y" test pattern for the measurement. This is a typical test pattern for

SIR tests.

A bias voltage (typically 50V) is applied to the test pattern for a speciﬁed time (typically one

second) to polarize the test pattern. The test voltage (typically 100V) is then applied and, after

a speciﬁed time (typically one second), Model 6514 measures the current. Surface insulation

resistance can now be calculated as follows:

SIR = V/I

where; V is the sourced test voltage

I is the measured current

230

V-Source

6514

Picommeter

PC Board

Test Pattern

Equivalent Circuit

Figure 4-9

Connections; surface

insulation resistance

test

Keithley 6514 User Manual

Other manuals for Keithley 6514