4.3‘‘ colour TFT display: 1800 series
Modern digital technology and safety current limitation for unproblematic workspace designs.
Medical devices must be tested for safety and function following their production.
Industry: medical technology
A testing system that allows automatic testing of a large number of different DUT had to be developed. Each DUT must be connected only once to avoid errors and to keep the test duration as short as possible.
In order to cover the large number of different DUT, a testing system with various connection options was developed, so that, for example, 5 user parts can be successively checked in the medical leakage current test, without having to replug them. In addition, ground bond tests, hipot tests, insulation tests and function tests are possible, without having to replug the DUT. Personnel safety is ensured by a light curtain that protects three sides of the testing area using deflecting mirrors. This makes it possible to insert or remove the DUT from the side.
A special requirement was that the DUT had to be operated by the test personnel during the function test. To this end, a special text view step was added, in which the working voltage remains switched on even upon interruption of the light curtain.
The testing system PC software allows storage of an arbitrary number of test programs, so that the necessary scope of testing and the test data can be adjusted for each DUT. However, for products with similarly mounted DUT, it is also possible to use the same test program, which is then allocated to the respective DUT over the product list. Referring to the accompanying documents, the correct test program is selected by scanning a bar code. The test results are stored automatically in XML or Access format on an arbitrary place on the network.
A separate test dummy is used to check the functionality of the testing system fully automatically. During the daily start of the testing system, the testing personnel is asked to connect this dummy and start the corresponding program. The testing system does not allow further testing without a passed dummy test.