You're on site for pre-commissioning and typing "how to field check p-n junction diode polarity with multimeter before energization" into your phone. A subcontractor has already signed the ITP. Before applying any bias from the test supply, what sequence actually confirms the junction orientation without stressing it?

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Accepted Answer

Applying voltage too early can puncture a marginal junction or mask a wiring error, leading to a failed SAT and schedule slip. Using diode-test mode limits current and directly reveals forward bias behavior while staying below stress levels, so you confirm polarity before any energization step.

Semiconductor Junctions

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