Fluke 1507 Insulation Resistance Multimeter

The Fluke 1507 is a compact, field-ready insulation resistance multimeter designed for industrial electrical testing, commissioning, and preventative maintenance. It measures insulation resistance from 0.01 MΩ to 10 GΩ across five selectable test voltages (50 V, 100 V, 250 V, 500 V, 1000 V) with measurement accuracy ranging from ±(1.5% + 5) at higher voltages to ±(3% + 5) at 50–100 V. The instrument automatically calculates Polarization Index and Dielectric Absorption Ratio, detects live circuits above 30 V, and discharges capacitive loads under 1 µF in less than 0.5 seconds for operator safety.

Technical Specifications

• Measurement range: 0.01 MΩ to 10 GΩ


• Test voltages: 50 V, 100 V, 250 V, 500 V, 1000 V


• Test voltage accuracy: +20%, −0%


• Short-circuit test current: 1 mA nominal


• Measurement accuracy: ±(3% + 5) at 50–100 V; ±(1.5% + 5) at 250–1000 V and up to 2000 MΩ; ±(10% + 3) above 2000 MΩ


• Auto discharge time: < 0.5 seconds for ≤ 1 µF load


• Live circuit detection: Inhibits test if terminal voltage exceeds 30 V AC/DC Voltage


• Range: 0.1 V to 600 V


• Resolution: 0.1 V


• Accuracy: ±(2% + 3 digits) at 50–400 Hz


• Input impedance: 3 MΩ nominal; 200 mA

Key Features

• Automatic PI and DAR calculations


• Pass/fail compare function for repetitive measurements


• Remote test probe included for hard-to-reach locations


• Pushbutton-controlled test probe


• Backlit LCD display with LED pass/fail and voltage indicators


• Auto power-off to extend battery life


• Four AA alkaline batteries; 1000+ tests at 1000 V; 2500+ earth bond tests


• Rugged design: survives 1-meter drops

Typical Applications

• Motor and transformer insulation testing


• Cable and winding diagnostics


• Earth continuity and bonding verification


• Maintenance and commissioning of electrical equipment


• Field troubleshooting in industrial environments

Physical & Mechanical

• Dimensions: 50 mm × 100 mm × 203 mm


• Weight: 550 g