UT501A Megger Insulation Resistance Tester 1000V


UNI-T Brand

2,750.00 EGP 2750.0 EGP 2,750.00 EGP

2,750.00 EGP

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Internal Reference: AVO.UT501A.UNIT

UT500 series insulation testers are used to measure the insulation resistance of electrical equipment and household appliances. This is done by measuring the insulation resistance between electrical circuits or between circuits and ground. UT500 series can measure insulation resistance, AC Voltage, low resistance, PI (Polarization Index), and DAR (Dielectric Absorption). These are ideal tools for ensuring transformers, generators, high-voltage motors, capacitors, cables, arresters, and other electrical equipment that can oprate in a safe and accurate manner.


  • 2000 count LCD display, overload indication, backlight
  • AC voltage measurement, auto power off
  • Auto discharge
  • Continuous low resistance measurement
  • Continuous measurements mode, red warning light and buzzer function
  • PI and DAR measurement, auto resistivity calculation
  • Low resistance returning to zero function to improve accuracy
Specifications Range   UT501A UT501B UT502A
Insulation resistance (Ω) Test voltages 100V/250V/500V/1000V 0%~10%    
    250V/500V/1000V   0%~10%  
    500V/1000V/2500V     0%~10%
  100V 0MΩ~100MΩ ±(3%+5)    
  250V 0MΩ~99.9MΩ ±(3%+5) ±(3%+5)  
    100MΩ~5GΩ ±(5%+5) ±(5%+5)  
  500V 0MΩ~99.9MΩ ±(3%+5) ±(3%+5) ±(3%+5)
    100MΩ~5GΩ ±(5%+5) ±(5%+5) ±(5%+5)
  1000V 0MΩ~99.9MΩ ±(3%+5) ±(3%+5) ±(3%+5)
    100MΩ~5GΩ ±(5%+5) ±(5%+5) ±(5%+5)
  2500V 0MΩ~99.9MΩ     ±(3%+5)
    100MΩ~9.9GΩ     ±(5%+5)
    10GΩ~20GΩ     ±(10%+5)
  Load current 50V (R=50kΩ) 1mA 0%~10% 0%~10% 0%~10%
    100V (R=100kΩ) 1mA 0%~10% 0%~10% 0%~10%
    250V (R=250kΩ) 1mA 0%~10% 0%~10% 0%~10%
    500V (R=500kΩ) 1mA 0%~10% 0%~10% 0%~10%
    1000V (R=1MΩ) 1mA 0%~10% 0%~10% 0%~10%
    2500V (R=1MΩ) 1mA     0%~10%
Short-circuit current     <2mA <2mA <2mA
Low resistance (Ω) 0.01Ω~200Ω (about 5.0V/>200mA)     ±(2%+3) ±(2%+3)
AC voltage (V) 30V~750V   ±(2%+3)    
  30V~600V     ±(2%+3) ±(2%+3)
Display count     2000 2000 2000
DAR 60s/15s and 60s/30s    
Auto range/Low battery indication    
LCD backlight/Light alarm    
Buzzer alarm/High voltage indication    
Over load indication/Auto discharge    
Test voltage secondary display    
10MΩ internal resistance test    
Meets IEC 61557
        61557-1:2007; 61557-2:2007; 61557-4:2007 (UT502A only)
General Characteristics          
Power 1.5V battery (LR6) x 6        
Display 70.6mm x 34mm        
Product Color Red and grey        
Product net weight 500g        
Product size 150mm x 100mm x 71mm        
Standard accessories
  Batteries, test leads, alligator clips, gallus   Batteries, test leads, alligator clips, gallus Batteries, test leads, alligator clips, gallus, test probes
Standard individual packing
    Gift box, carrying bag, English manual   Gift box, carrying bag, English manual   Gift box, carrying bag, English manual