Fluke 1577 Insulation Multimeter Overview of Fluke 1577 Insulation Multimeter The Fluke 1577 Insulation Multimeter is a professional-grade testing instrument designed for insulation resistance testing and advanced electrical troubleshooting. Combining insulation testing up to 1000V with True-RMS multimeter functionality, the Fluke 1577 Insulation Multimeter allows technicians to measure voltage, resistance, continuity, and insulation safely and accurately. Its rugged design and clear digital display make it suitable for industrial, commercial, and maintenance environments where reliability and safety are essential. Key Features Combines 1000V insulation tester + true RMS multimeter Test voltages: 500V / 1000V with insulation range up to 2 GΩ Measures AC/DC voltage, resistance, continuity, and current True RMS accuracy for non-linear loads and noisy environments Includes remote test probe for easy one-handed measurements Large backlit display for improved visibility Auto power off, data hold, low battery indication Rugged Fluke build quality, CAT III 1000V / CAT IV 600V rated Built with FLUKE CONNECT Specifications Voltage DC Maximum voltage 1000 V Accuracy ±(0.2%+2) Maximum resolution 0.001 V Voltage AC Maximum voltage 1000 V Accuracy ±(2%+3) Maximum resolution 0.1 mV Current DC Maximum amps 400 mA Amps accuracy ±(1.0%+2) Maximum resolution 0.01 mA Current AC Maximum amps 400 mA Amps accuracy ±(2.0%+2)* Maximum resolution 0.01 mA Resistance Maximum resistance 50 MΩ Accuracy ±(1.2%+2) maximum resolution 0.1Ω Insulation Test Minimum test current @ 1kΩ/V 1 mA Test voltages 500, 1000 V Maximum resistance per test voltage 50 V 100 V 250 V 500 V 1000 V 600 MΩ Maximum resolution per test voltage 50 V 0.01 MΩ 100 V 0.01 MΩ 250 V 0.1 MΩ 500 V 0.1 MΩ 1000 V 0.1 MΩ Accuracy per test voltage 50 V ±(3% + 5) 100 V ±(3% + 5) 250 V ±(1.5% + 5) 500 V ±(2.0% + 5) 1000 V ±(2.0% + 5) Environmental Specifications Operating temperature –20°C to +55°C Storage temperature -40°C to +60°C Humidity (without condensation) 0% - 95% (10°C – 30°C)0% - 75% (30°C – 40°C)0% - 40% (40°C – 55°C) Operating altitude 2000 m Safety Specifications General IEC 61010-1: Pollution Degree 2 Measurement IEC 61010-2-033: CAT IV 600V / CAT III 1000V Mechanical and General Specifications Size 203 x 100 x 50 mm (with holster) Weight 624 g Warranty 3 years Battery life alkaline Meter use 1000 hours Insulation test use Meter can perform at least 1000 insulation tests with fresh alkaline batteries at room temperature. These are standard tests of 1000 V into 1 MΩ with a duty cycle of 5 seconds on and 25 seconds off. IP rating IP40 What's in the box: Remote probe Test leads Alligator clips Hard case Four AA alkaline batteries Quick reference guide CD rom with manual
