Product selection guide: Insulation testers | Fluke
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Product selection guide: Insulation testers

Use our product selection guide to find the insulation tester that fits your needs best.
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Fluke 1587 FC Insulation Multimeter
Fluke 1577 Insulation Multimeter Image 01
Fluke 1587 FC Insulation MultimeterFluke 1577 Insulation Multimeter
PI/DAR timed ratio test  
Temperature compensationThrough Fluke Connect™ Measurements app 
Memory storageThrough Fluke Connect™ Measurements app 
Insulation test voltages50 V, 100 V, 250 V, 500 V, 1000 V500 V, 1000 V 
Insulation resistance0.01 MΩ to 2 GΩ0.01 MΩ to 600 MΩ 
Auto-discharge of capacitive voltage   
Insulation test smoothing reading  
Frequency  
Capacitance  
Diode test  
Temperature  
Min-max  
Low-pass filter (for work on VSDs)  
AC/DC voltage   
DC millivolts   
AC/DC milliamps   
Resistance0.01 MΩ to 50 MΩ0.01 MΩ to 50 MΩ 
Continuity   
Warranty3 years3 years 
Remote probe, test leads, alligator clips   
Type K thermocouple  
Rugged, utility hard case   
Auto power off   
Fluke Connect™ compatible  
Auto / manual ranging  
Basic DC accuracy0.09 % 
Counts6000 
Digits3.5 
True RMS readingsAC 
Wide bandwidth5 kHz 
Capacitance9,999 µF 
Continuity with beeper  
Current AC/DC400 mA 
Diode test  
Frequency99.99 kHz 
Insulation test  
Number of voltage test ranges  
Resistance50 MΩ 
Temperature-40 °C to +537 °C 
Voltage AC/DC1000 V 
Backlight  
WirelessFluke Connect™ enabled 
Display hold  
Min-max recording  
Automatic power off  
Closed case calibration  
Fuse access  
Low battery indication  
Operating temperature range-20 °C to +55 °C 
Removable holster  
Smoothing  
Dangerous voltage indication  
EN61010-1 CAT III1000 V 
EN61010-1 CAT IV600 V 
Input alert  
IP ratingIP 40 
Warranty3 years 
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