electrical safety tester / high-voltage / continuity / for medical devices

Upon completion of the production of surgical instruments, electrical continuity and integrity of the plastic wrap must be examined. For multi-pole instruments, the insulation between the two electrodes must also be checked.

Solution
Referring to the accompanying documents, the correct test program is selected by scanning a bar code, so that the real test can also be performed by semi-skilled staff. Electrical continuity is checked with up to two continuity tests per instrument. The insulation between the electrodes and the integrity of the plastic wrap is checked by applying a high voltage. To test the wrap, the entire DUT is inserted into a narrow metal pipe. This metal pipe then acts as a potential for the high voltage test.

It is possible to cover the high number of versions using various test adapters that are also adjustable in their length. Contacting is partially done by spring contact pins and by pneumatic pins in case of hypersensitive DUT; these pins are also used to fix the DUT.

Up to ten DUT can be inserted into the test adapter at once. They are tested in parallel in the high voltage test. If an error occurs, they are individually retested to select the defective DUT. Following this, the testing personnel is asked to remove the defective instruments, which is automatically controlled by a further step. By performing a 4-wire measurement, the correct contacting of the DUT is monitored in the high voltage test.