This linear test solution utilises an individual DUT (device under test), carrier and the complete testing and marking of PLCD sensors is carried out in the one test station. The PLCD is placed onto a carrier and scanned it’s previously assigned serial number is now used for all following test steps.

In the first test station all the hall sensors are tested with pol- wheels. All test results are collected and evaluated. Simultaneously the mountings are checked for location and dimensions. All electrical and mechanical tests are performed by the AST. With test data presented graphicallat the relevant test station.

At the second station the multiple connector is tested for correct sealing. At the same time, additional mechanical data is gathered and stored ready for process feedback. The third station programs the Z- channel PLCD sensor to the manufactures specification. Again the Cirris AST carries out all the tests and displays the results graphically on the operators station display.

In the fourth station, each PLCD sensor is tested in the same manner as in the previous station. An interesting point to note is that stations 3 and 4 are identical. This means that every station can be independently programmed and verified, therefore lowering costs whilst increasing flexibility and efficiency. Cost efficiency is one of the prime attributes of the Cirris AST.

Station five is unused and opens possibilities for future expansion. Station Six marks the DUT with a unique number generated by the system. At station seven the DUT is removed from its carrier and according to the test result, pass or fail, it is placed into the proper location, (i.e. good part chute / bad part for re-work).

Special Features

All the adapters and sub-adapters are designed to be fully floating and self-centering. AST testers are used to perform the test function on all the test stations with the test parameters store in a common SQL data base.

Following testing, marking is done by a pneumatically operated needle directly controlled by the AST. An electronic carrier identification system enables data to be placed onto the corresponding carrier. The DUT’s are then removed from the carrier and divided into categories: Good, Bad and Re-work. The test system can be loaded automatically or manually by the operator whenever it is required.