• AC/DC voltage (up to 1000V) & current (up to 400mA)
  • 0.1 to 600MΩ insulation test
  • 0.1Ω to 50MΩ resistance
  • CAT III 1000V, CAT IV 600V measurement category
  • 3-year warranty
Interested in a FREE demo? Call 1-800-884-4967 or complete this form to submit your request.

What's in the Box

  • Remote probe
  • Test leads
  • Alligator clips
  • User documentation
  • Hard case


The Fluke 1577 insulation multimeters combine a digital insulation tester with a full-featured, True RMS digital multimeter in a single compact, handheld unit, which provides maximum versatility for both troubleshooting and preventative maintenance.

The 1577 has a large display with backlight. It measures AC/DC voltage, DC millivolts, AC/DC milliamps, resistance (Ω) and continuity. For added user protection the meters have live circuit detection which prevents an insulation test if voltage greater than 30V is detected. They also have auto-discharge of capacitive voltage as an added user protection. The auto power off feature saves battery life.



Test Leads


Current Clamps



Please consider these optional accessories.