Verifying Your Test Fixturing

Using wires to test your wires?

When using automatic test equipment to test wiring harnesses, you are not only testing your Device Under Test (DUT) you are also testing the mating harness, or test fixturing, used to connect your DUT to the tester. In order to successfully test your DUT, you MUST have good interface fixturing. When using a harness, cable, or other adapting device, how do you know that it is good?

Verify that your test fixuring is good, BEFORE using it to test your cables/harnesses

Perhaps you have customers auditing your process who require you to verify test fixturing, or perhaps you have just found an error(s) in the device under test and would like to narrow down whether it is really the device or whether it is the fixture that you are using to test with.

Cirris' easy-wire testers, CR, CH+ and CH2, have a built in Fixture Verification feature that eliminates the need to have two operators painstakingly "beep out" a test fixture with a multi-meter to verify its validity. With this Fixture Verification software a single operator can quickly and easily check the fixture to verify that each conductor is present, is connected to the correct pin in the mating connector and that it is not shorted to any other

"The Cirris' Family of easy-wire testers, CR, Easy Touch and CH2, have a built in Fixture Verification feature."


Fixture verification in the easy-wire software is a snap to use, since you have already created your test program you have already done all the work. The process involves two simple button clicks, then probing each point in your mating connectors as prompted by the software.

Step 1:

From the main menu in the easy-wire software select the test program for the interface fixture you wish to Verify. It can be for the CR, CH+, or CH2 testers. (Example, 'Testing Rules')

"The Device Under Test Cannot be guaranteed to be correct if the fixture/program has not been verified."



Step 2:

Click the "Verify" button, then, from the "Verify" menu click "Fixturng"

You will be prompted to remove the DUT from the test fixture. Since you are verifying the FIXTURING ONLY, it is important that nothing else is plugged in at this time.

You will also need to plug the test probe (supplied with your tester) into the probe jack of the tester. (Any standard banana jack probe will work.)