Built for high voltage insulation checks in the field and at the bench. The Extech 380396 High Voltage Digital Insulation Tester (220V) delivers reliable tests with clear, stable results. It suits maintenance teams who need fast setup and steady readings. It also helps reduce retests by keeping outputs consistent.
Measurement capability and accuracy
Insulation ranges span from megohms to gigaohms to suit small and large systems. Output steps cover common test levels so you can match site standards with ease. Readings remain clear thanks to solid basic accuracy across voltage and resistance. Operation stays simple with clear range selection and feedback.
Timed tests and trend insight
Timed IR tests from one to fifteen minutes let you run PI and DAR without guesswork. Min and max capture, peak hold, and relative mode make changes easy to see during and after a test. You can confirm supply conditions by checking AC and DC voltage on the same unit. You can then record results with confidence for future comparison.
Power options fit both bench and field tasks with batteries or an included adaptor. A strong case and full leads keep the instrument ready for transport and daily use. The layout is practical so new users can learn fast. The build supports regular testing on plant without fuss.
Key features
- Multiple test voltage selections for flexible tasks
- High insulation range supports large systems
- Polarisation Index and DAR modes assess health
- Timed IR tests aid stable trend analysis
- Min and max capture tracks variation during checks
- Peak hold helps catch brief events
- Relative mode simplifies comparison between points
- Measures AC and DC voltage for quick verification
- Continuity function simplifies circuit verification
- General resistance range for component checks
- Runs on batteries or mains with supplied adaptor
- Supplied hard case protects the instrument
