Interpreting Test Results
37
Dielectric Failure Error:
● This error indicates that an arc occurred during the high voltage test to the net or point given in the error message.
This error will occur anytime the current exceeds the ‘DW Max Current’ test setting.
● This error most often occurs in pairs—Two dierent nets will fail. This generally means that the arc is occurring be-
tween these two nets. If the error occurs only on a single net, it may be the result of a highly capacitive net such as a
shield. The 4250 tester has a setting that can overcome an error caused by highly capacitive shields. See page 20.
■ Leakage Error
This error is an indication that the measured insulation resistance is lower than specied by the IR Resistance test setting.
■ HV Errors Graph
The graph represents a normal, good set of high voltage tests. The red line represents voltage while the blue line represents
current. If the blue current line ever enters one of the pink regions, the specied error will result. You can see how high volt-
age errors, like those descibed above, occur during a high voltage test.
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