Fluke 1535 Insulation Resistance Tester 2500 V With PI/DAR | 500GΩ CAT IV

Fluke 1535 2500V Insulation Tester for Industrial and Solar Diagnostics

The Fluke 1535 Insulation Resistance Tester is a portable high-voltage testing instrument engineered for accurate insulation resistance analysis in industrial and solar applications. With preset test voltages up to 2500 V and measurement capability reaching 500 GΩ, it supports reliable frontline troubleshooting in demanding environments.

High-Voltage Insulation Testing Capabilities

• User-selectable test voltages of 250 V, 500 V, 1000 V, and 2500 V
• Insulation resistance measurement range from 200 kΩ to 500 GΩ
• Automatic Polarization Index (PI) calculation
• Automatic Dielectric Absorption Ratio (DAR) calculation

Portable Design with Safety-Focused Architecture

Designed for field and plant use, the Fluke 1535 combines a lightweight form factor with CAT IV 600 V safety rating and built-in voltage alarm functionality. A short-circuit current up to 5 mA supports fast, stable resistance measurements while reducing test time.

Supported Applications

• Industrial motor and cable insulation testing
• Solar photovoltaic system insulation verification
• Electrical maintenance and troubleshooting workflows