Insulation Resistance Testers

Learn how Polarization Index (PI) and Dielectric Absorption Ratio (DAR) testing go beyond basic insulation resistance measurements. This article explains what the ratios reveal, acceptable PI values, and when advanced insulation diagnostics are necessary for reliable asset management.

Selecting the right test voltage shouldn't feel like guesswork. This quick guide breaks down recommended insulation resistance test settings by application, helping teams choose an appropriate test voltage for reliable readings and safer testing.