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Set 4W Probe Point
Measure 4W Probed Resistance
Some points on the DUT may be easier to test using a probe rather than fixturing. When used together
these custom instructions allow you to verify very accurate 4-wire resistance measurements from a 4-wire
probed point on the DUT to another 4-wire point used as a probe. If the correct specified test point is
probed and its resistance is within the specified high limit and low limit, this custom instruction will pass.
Rather than use the standard probe on the CH2 tester, using these custom instructions requires that you
use two test points to make a 4-wire probe. An additional two test points are required for the other end of
the probed DUT point. By using 4-wire connections to the DUT, all resistances inherent in the probe and
fixture can be excluded from the resistance measurement. The Diagram below shows how we would
setup to use these commands for a simple one wire cable.
Before using these custom instructions you need to construct your 4-wire fixturing and attach in the Easy-
Wire software the 4-wire test points. By using the Set 4W Probe Point dialog box shown below you
identify a 4-wire test point for the probe. Note, only 4-wire test points will be displayed in this dialog box.
Set 4W Probe Point dialog box
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