Insulation inspection method and insulation inspection apparatus

An insulation test apparatus for conducting an insulation test on a plurality of wiring patterns on a circuit board, comprising:

• selection means for selecting from said plurality of wiring patterns a first wiring pattern and one or more other wiring patterns;
• a power supply for providing an electrical output between the first wiring pattern and the one or more other wiring patterns;
• a measurement means for measuring an electrical signal between the first wiring pattern and the one or more wiring patterns resulting from said electrical output;
• and
• a calculation means for calculating an electrical characteristic of a region between the first and the one or more other wiring patterns on the basis of the electrical output from the power supply and the measured electrical signal.

A method for conducting an insulation test on a plurality of wiring patterns on a circuit board, comprising the steps of:

• selecting from said plurality of wiring patterns a first wiring pattern and one or more other wiring patterns;
• connecting a power supply output across the first wiring pattern and the one or more other wiring patterns;
• measuring an electrical signal between the first wiring pattern and one or more other wiring patterns resulting from said electrical output;
• and
• calculating an electrical characteristic between the first wiring pattern and the one or more other wiring patterns based on the power supply output and the measured electrical signal to determine the presence of an insulation failure region between the first wiring pattern and the one or more other wiring patterns.