Fluke 1577 Insulation Multimeter

The Fluke 1577 Insulation Multimeter combines a digital insulation tester and true-RMS digital multimeter into a single handheld instrument. It delivers dual-function capability for troubleshooting and preventative maintenance of electrical systems, motors, generators, cables, and switchgear without carrying separate tools.

Technical Specifications

• Test voltages: 500 V, 1000 V


• Insulation resistance measurement range: 0.1 MΩ to 600 MΩ


• Resolution: 0.01 MΩ (50 V, 100 V); 0.1 MΩ (250 V, 500 V, 1000 V)


• Accuracy: ±(3% + 5) at 50 V and 100 V; ±(1.5% + 5) at 250 V; ±(2.0% + 5) at 500 V and 1000 V


• Minimum test current: 1 mA @ 1 kΩ/V


• Auto discharge of capacitive voltage: Yes


• Live circuit detection: Prevents insulation test above 30 V Digital Multimeter Functions


• DC voltage: 0–1000 V, ±(0.2% + 2) accuracy, 0.001 V resolution


• AC voltage: 0–1000 V, ±(2% + 3) accuracy, 0.1 mV resolution


• DC current: 0–400 mA, ±(1.0% + 2) accuracy, 0.01 mA resolution


• AC current: 0–400 mA, ±(2.0% + 2) accuracy, 0.01 mA resolution


• Resistance: 0–50 MΩ, ±(1.2% + 2) accuracy, 0.1 Ω resolution


• Continuity and true RMS included Safety & Environmental


• Overvoltage category: CAT III 1000 V, CAT IV 600 V


• Safety standards: ANSI/ISA 82.02.01 (61010-1) 2004, CAN/CSA-C22.2 NO. 61010-1-04, IEC/EN 61010-1 2nd Edition


• IP40 rating; dimensions 203 mm × 100 mm × 50 mm; weight 0.624 kg


• Operating temperature: –20°C to +55°C


• Large backlit LCD display

Key Features

• Battery life: 1000 hours (meter use); minimum 1000 insulation tests per alkaline battery set


• Auto power-off function


• Includes remote probe, test leads, alligator clips, hard case, and four AA alkaline batteries

Typical Applications Electrical system troubleshooting, motor and generator testing, cable insulation verification, switchgear maintenance.