Abstract: The multi-channel data acquisition can be achieved by the relay switch matrix with software versatile configuration and without hardware change in different test flows. It is used in many model automatic test system. The test result is affected directly by the quality of the relay switch matrix function. The test method for the relay switch matrix function is introduced, the test system of the relay switch matrix function is designed. The data is analyzed by software automatically. The wrong of relay short and relay open, and pin soldered are tested automatically. The test scope is expanded and the test efficiency is increased dramatically.

Key words: Relay, Switch matrix, Data acquisition, Automatic test system