Features: PI/DAR timed ratio tests (1587 FC only) Live circuit detection prevents insulation test if voltage > 30 V is detected for added user protection VFD low-pass filter for accurate motor drive measurements (1587 FC only) Auto-discharge of capacitive voltage for added user protection Insulation test (1587 FC: 0.01 M? to 2 G?) (1577: 0.1 M? to 600 M?) Insulation test voltages (1587 FC: 50 V, 100 V, 250 V, 500 V, 1000 V),(1577: 500 V, 1000 V) for many applications AC/DC voltage, DC millivolts, AC/DC milliamps, Resistance (?), Continuity Capacitance, diode test, temperature, Min/Max, frequency (Hz) (1587 FC only) Auto power off to save battery power CAT III 1000 V, CAT IV 600 V measurement category Technical Specifications: Maximum voltage applied to any terminal and common: 1000 V Storage temperature: -40 °C to 60 °C (-40 °F to 140 °F) Operating temperature: -20 °C to 55 °C (-4 °F to 131 °F) Temperature coefficient: 0.05 x (specified accuracy) per °C for temperatures 28 °C (82 °F) Relative humidity :Noncondensing 0% to 95% @ 10 °C to 30 °C (50 °F to 86 °F) 0% to 75% @ 30 °C to 40 °C (86 °F to 104 °F) 0% to 40% @ 40 °C to 55 °C (104 °F to 131 °F) Vibration: Random, 2 g, 5-500 Hz per MIL-PRF-28800F, Class 2 instrument Radio frequency communication: 2.4 GHz ISM Band Radio frequency certification: FCC: T68-FBLE, IC: 6627A-FBLE Inclusions: 1 x Fluke Insulation Multimeter FLU1587FC - FLU1587FC