The Fluke 1587 T Insulation Multimeter combines insulation testing and true-RMS digital multimetry in a single handheld instrument. It measures insulation resistance from 0.01 MΩ to 2 GΩ across five test voltages (50 V, 100 V, 250 V, 500 V, 1000 V) while providing full multimeter functionality for voltage, current, resistance, capacitance, frequency, and temperature measurements. The unit integrates live circuit detection, auto-discharge in less than 0.5 seconds, and smoothing-capable readings, making it ideal for preventative maintenance and troubleshooting across industrial and telecommunication environments.
Technical Specifications
Insulation Testing
• Measurement range: 0.01 MΩ to 2 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
• Maximum capacitive load: 1 µF
• Auto-discharge time: 30 V
Multimeter Functions
• Display: 6000 counts
• DC voltage: 6 V to 1000 V (±0.09% + 2)
• AC voltage: 60 V to 1000 V (±2% + 3), true-RMS, 5% to 100% of range
• DC millivolts: 600.0 mV (±0.1% + 1)
• AC/DC current: up to 400 mA (DC accuracy ±0.2% + 2; AC accuracy ±1.5% + 2)
• Resistance: up to 50 MΩ (±0.9% + 2)
• Continuity: Audible tone below 25 Ω; < 8.0 V open circuit voltage
• Capacitance: up to 9,999 µF (±1.2% + 2)
• Frequency: 10 Hz to 20 kHz (±0.1% + 1)
• Temperature: -40 °C to 537 °C (0.1 °C resolution)
• Diode test function included
– Key Features
• Dual functionality eliminates need for separate insulation tester and multimeter
• Live circuit detection prevents unsafe measurements
• Operates with up to 1 µF capacitive loads
• Input impedance 10 MΩ nominal with < 100 pF capacitance
• 1000 V rms/dc overload protection
• True-RMS AC measurement with crest factor handling up to 3 (at ≤500 V)
– Typical Applications
Motor and generator insulation verification, cable testing, switchgear assessment, preventative electrical maintenance, telecommunications infrastructure diagnostics.
– Compatibility & Integration
Note: For telecom applications, certain configurations may limit test voltages to 50 V and 100 V.
