Product selection guide: Insulation testers

Use our product selection guide to find the insulation tester that fits your needs best.
Fluke 1577 Insulation Multimeter Image 01
Fluke 1587 FC Insulation Multimeter
Fluke 1577 Insulation MultimeterFluke 1587 FC Insulation Multimeter
Insulation test voltages500 V, 1000 V50 V, 100 V, 250 V, 500 V, 1000 V 
Insulation resistance0.01 MΩ to 600 MΩ0.01 MΩ to 2 GΩ 
Auto-discharge of capacitive voltage   
AC/DC voltage   
DC millivolts   
AC/DC milliamps   
Resistance0.01 MΩ to 50 MΩ0.01 MΩ to 50 MΩ 
Warranty3 years3 years 
Remote probe, test leads, alligator clips   
Rugged, utility hard case   
Auto power off   
PI/DAR timed ratio test  
Temperature compensationThrough Fluke Connect™ Measurements app 
Memory storageThrough Fluke Connect™ Measurements app 
Insulation test smoothing reading  
Diode test  
Low-pass filter (for work on VSDs)  
Type K thermocouple  
Fluke Connect™ compatible  
Auto / manual ranging  
Basic DC accuracy0.09 % 
True RMS readingsAC 
Wide bandwidth5 kHz 
Display hold  
Min-max recording  
WirelessFluke Connect™ enabled 
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 
Automatic power off  
Closed case calibration  
Fuse access  
Low battery indication  
Operating temperature range-20 °C to +55 °C 
Removable holster  
Dangerous voltage indication  
EN61010-1 CAT III1000 V 
EN61010-1 CAT IV600 V 
Input alert  
IP ratingIP 40 
Warranty3 years