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Megger MIT1025 10kV Insulation Resistance Tester

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Housed in its own protective casing, the Megger MIT1025 is a hard-wearing insulation resistance tester that can be used to measure resistance levels up to an extremely high threshold of 20TΩ.

The MIT1025 can perform PI, DAR, DD, SV and ramp testing procedures and can also be used to test even when the battery is dead by feeding into power from line power/mains. The batteries inside the device are fully rechargeable and make use of quick charge technology to ensure there's less waiting around and more testing being carried out.

Inside the tester's case the MIT1025 has a large, clearly visible screen which relays test results, and this can be used to relay information about voltage, leakage current, capacitance, battery status and time constant, as well as the overall elapsed time of the testing procedure.

The MIT1025 is CAT IV 600V safety rated.

Megger MIT1025 Insulation Resistance Tester Key Features

  • 20TΩ maximum insulation resistance
  • Timed IR plus PI and DAR diagnostic testing
  • Can operate even when batteries are dead when hooked up to on line power/mains
  • Rapid charge battery gives up to 6 hours continuous testing
  • Dedicated voltmeter functionality from 30V to 660V
  • CAT IV 600V safety rated
  • Large built-in LCD screen with automatic backlight for use in darkened conditions
  • Noise filter automatically filters out electrical noise up to 3mA
  • Dielectric discharge, step voltage and ramp testing functions
  • In built memory stamps data with time/date information and allows users to recall tests
  • Download data directly to PC via USB connection
  • Compatible with PowerDB Lite software package

Full List of Products Included

  • Megger MIT1025 Insulation Resistance Tester
  • User Guide CD
  • Power Lead
  • 3m Leadset x 3 with Medium Insulated Clips
  • 3m Leadset x 3 with Large Insulated Clips
  • USB Cable
  • PowerDB Lite Software
Part Code1001-943

Megger MIT1025 Technical Specifications

Electrical Specifications  
Voltage Input Range 85-265 V rms, 50/60 Hz, 60 VA
Battery 11.1 V, 5.2 A hour, meets IEC
Battery Life Typical capacity 4.5 hours
continuous at 10 kV with a 100 MΩ
Battery Charge Time 2.5 hours from deep discharge,
2 hours normal discharge
30 Min. Quick Charge 1 hour operation at 5 kV, 100 MΩ
Test Voltages 500 V, 1000 V, 2500 V, 5000 V,
10000 V
User Defined Test Voltage 5 kV to 10 kV in 25 V steps
Accuracy (23 °C): ±5% to 2 TΩ, ±20% to 20 TΩ
Guard 2% error guarding 500 kΩ leakage
with 100 MΩ load
Display Range Analogue 100 kΩ to 10 TΩ
Display Range Digital 10 kΩ to 20 TΩ
Short Circuit Current 3 mA nominal, max. power on all
loads outperforming many 5 mA
Insulation Alarm 10 kΩ to 1 TΩ
Capacitor Charge <5 s/μF at 3 mA to 10 kV
Capacitance Range (above 500V) 10 nF to 25 μF (dependant on
 measurement voltage)
Capacitance Accuracy ±10% ±5 nF
Voltage Output Accuracy (0 to 30°C) +4%, -0%, ±10 V nominal test voltage
at 1 GΩ
Current Measurement Range 0.01 nA to 6 mA
Current Measurement Accuracy (23°C) ±5% ±0.2 nA at all voltages
Interference (Noise) Rejection 1 mA per 600 V up a maximum of
3 mA
Voltmeter Range 30 V to 660 V ac or dc, 50/60 Hz
Voltmeter Accuracy ±3%, ±3 V
Timer Range Up to 99 minutes, 15 second
minimum setting
Memory Capacity 5½ hours continuous logging every 5 s.
or 33 logged PI tests
or 350 logged IR tests
Test Regimes IR, IR(t), DAR, PI, SV, DD, ramp test
Interface USB type B (device)
Real Time Output USB, 1 reading/second (voltage,
current and resistance)
Environmental Conditions  
Altitude 3000 m, CAT rating maintained
>2000 m*
* Test leads connected
Operating Temperature -20 °C to 50 °C
Storage Temperature -25 °C to 65 °C
Humidity 90% RH non-condensing at 40 °C
Ingress Protection IP65 (lid closed), IP40 (lid open)
General Specifications  
Safety Meets the requirements of
IEC 61010-1, CATIV 600 V
EMC Meets the requirements of
Dimensions L 315 mm x W 285 mm x H 181 mm
Weight 4.5 kg
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