Engineering tests
Besides the type tests and the production tests, HBM has also performed
several engineering tests to verify the robustness of the design during the
engineering design qualification phase.
Component tests
Every component crossing the isolation barrier is tested and/or examined to
make sure it will pass the type test. The test voltage used is the same high
voltage DC that is used for the type tests, as well as an additional impulse
voltage of up to 6 kV. The test voltage uses a 1.2 μs rise time and an amplitude
reduction of 50% of the maximum peak voltage in 50 μs after the peak has
been reached.
-
+
ADC
Isolated channel
-
+
ADC
Isolated channel
Chassis
6 kV peak
Engineering test
50%
Upk
1 µs
50 µs
Time
Ampli
tu
de
Input impulse
Figure 12.20:
Example of 1.2/50 µs impulse
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