We have built a prototype leakage current test setup for signal hedgehog boards, which can test (8) 3x8 hedgehog boards simultaneously. Here is a slide [hh_testing.pdf] showing the setup. The setup includes a programmable HV supply, a programmble HV switch and an electrometer. Leakage current is measured periodically for each board over a period of 8 hours.
This setup uses the following equipment:
Here is a BLOCK DIAGRAM of the setup.
Here are some photos of the test board which holds the hedgehog during testing.
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| Hedgehog mounted on test board |
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| Hedgehog mounted on test board. Twisted pairs provide a ground connection via the header connectors on the hedgehog. |
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| Hedgehog and test board overview |
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| Custom machined test pins. |
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| Detail of test board |