MarMonix MIR 1020 Insulation Tester | 10kV High Voltage Megohmmeter
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High Voltage: Adjustable testing voltages from 250V up to 10kV
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Massive Range: Measures insulation resistance from 0.5MΩ to 20TΩ
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Smart Modes: Includes PI, DAR, RAMP, and Filtered Resistance (FR) tests
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Safety First: Auto-discharge and live circuit monitoring (>36V alert)
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Data Power: Stores 1000 groups of data with USB upload capability
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Field Ready: IP65 closed-case rating with rechargeable 6.2Ah battery
MarMonix MIR-1020 Insulation Resistance Tester
The MarMonix MIR 1020 is an intelligent, high-performance digital insulation resistance tester engineered for the most demanding high-voltage applications. Designed for heavy industry, the MIR1020 excels in testing large-capacity equipment like transformers, generators, and long-distance transmission lines. Its ability to deliver test voltages up to 10kV and measure resistance up to 20TΩ makes it a top-tier instrument for electrical maintenance professionals.
Safety and precision are at the core of the MIR-1020. It features an automatic discharge function and real-time voltage monitoring to protect both the operator and the instrument from accidental live circuits. With advanced diagnostic modes like Polarization Index (PI), Dielectric Absorption Ratio (DAR), and Ramp Test (RAMP), the marmonix mir 1020 provides a comprehensive analysis of insulation health. Data from the MIR_1020 can be easily stored and uploaded to a PC via USB, ensuring streamlined reporting and trend analysis.
MarMonix MIR-1020 Key Features
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Precision Testing: Short circuit current >7mA for stable readings on large loads
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Capacitance: Measures up to 25uF with leakage current monitoring
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Rugged Build: Heavy-duty 4.9kg design for power plants and transmission lines
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Clear Interface: Large display with battery status and auto-shutdown function
Advanced Features MarMonix MIR-1020
The Marmonix MIR-1020 is designed to deliver precise and reliable insulation resistance testing for high-voltage applications.
- Wide Measurement Range: The MIR-1020 supports an extensive insulation resistance range from 0.5MΩ to 20TΩ, making it suitable for various high-voltage applications.
- Multiple Voltage Levels: The tester operates at six selectable voltage settings (250V to 10kV), providing flexibility for different testing requirements.
- High Short Circuit Current: With a maximum short circuit current exceeding 7mA, the MIR-1020 ensures reliable and accurate insulation resistance measurements.
- Real-Time Voltage Monitoring: The built-in voltage monitor function automatically detects and prevents testing if live voltage exceeds 36V, ensuring operator safety.
- Automatic Discharge Function: Once the test is completed, the device automatically discharges residual voltage, enhancing safety and efficiency.
- Comprehensive Testing Modes: Includes Insulation Resistance (IR), Polarization Index (PI), Dielectric Absorption Ratio (DAR), Ramp Test Mode (RAMP), and Filtered Resistance (FR) for in-depth insulation analysis.
MarMonix MIR 1020 Specifications
The Marmonix MIR-1020 is a high-precision insulation resistance tester designed for testing high-voltage electrical equipment. With advanced features and a durable design, it is ideal for professionals in power plants, telecommunications, and industrial maintenance. Below are its key specifications.
| Feature | Specification |
|---|---|
| Function | Insulation resistance measurement (IR), Polarization Index Test (PI), Dielectric Absorption Ratio Test (DAR), Ramp Test Mode (RAMP), Filtered Resistance Test (10S, 20S, 30S, 40S), Voltage Measurement (V), Capacity Measurement (uF), Current Measurement (nA) |
| Power Supply | Rechargeable lithium battery pack 6.2Ah |
| Rated Voltage | 250V / 500V / 1000V / 2500V / 5000V / 10KV |
| Output Voltage Accuracy | (5%-10%) ±10V |
| Insulation Resistance Range | 0.5MΩ – 20TΩ |
| Short Circuit Current | >7mA MAX |
| Polarization Index Test (PI) | Yes |
| Dielectric Absorption Ratio Test (DAR) | Yes |
| Ramp Test Mode | Test at 10% of the preset voltage until the preset voltage |
| Filtered Resistance Test Mode | 10S, 20S, 30S, 40S |
| Capacitance Measurement | Range: 10nF – 25uF; Accuracy: ±10% ± 10 nF |
| Voltage Measurement | Range: AC/DC 0V – 1000V; Accuracy: ±5% rdg ±3V |
| Leakage Current Measurement | Range: 0.01nA – 9.00mA; Accuracy: ±5% rdg + 0.5nA |
| Voltage Monitor | Monitors measured object voltage and discharge status; prevents testing above 36V to protect instrument and operator |
| Test Time | Automatic record test time, range: 0s – 99995s |
| Storage Function | Automatically stores test data with date and time, up to 1000 groups |
| Upload Function | Uploads stored data to computer via USB cable |
| Battery Power Display | Displays battery power; alerts when battery is low |
| Automatic Shutdown | Auto shutdown after 15 minutes of inactivity |
| Meter Dimension | 280mm × 260mm × 160mm |
| Weight | 4900g |
| Test Wire | Red high voltage test wire (with alligator clip and hook), green test wire, black test wire |
| Protection Level | Closed case: IP65, Open case: IP40 |
| Withstand Voltage | 3mA AC 50Hz |
| Working Temperature and Humidity | -20°C to 50°C, 80% RH |
| Storage Temperature and Humidity | -25°C to 65°C, 80% RH |
| Insulation Resistance | 50MΩ at 1000V (between test circuit and shell) |
| Withstand Voltage | AC 3kV 50Hz for 1 min (between test circuit and shell) |
| Suitable Safety Standard | IEC61010-1, IEC61326-1 |


Jorge_Mex –
great tester mir-1020 is solid but the usb cable is a standard type easy to replace if lost
Fatima_K –
we bought three mir 1020 units for our maintenance fleet and all are working perfectly
Wei_Testing –
the leakage current display on the mir 1020 helps us pinpoint faults very quickly
Ingrid_S –
battery takes a while to charge but once full the mir-1020 runs for weeks of spot checks
Ahmed_Oman –
very happy with the mir-1020 the backlight is bright enough for substation work at night
Thomas_W –
screen is huge and easy to read but the MIR 1020 buttons are a bit stiff with gloves on
Pavel_K –
the ramp test mode on the mir 1020 is fantastic for diagnosing aging insulation in our generators
Liu_Wei_Grid –
excellent stability on high resistance values the mir-1020 settles much faster than our old analog meters
Linda_Safety –
compliance testing is a breeze with the mir-1020 the auto timer is very useful
Marc_Industrial –
rugged ip65 case means i dont worry about the mir 1020 in the rain
Budi_Indo –
fast delivery to jakarta the mir1020 is exactly what we needed for our factory annual shutdown
Raj_Patel –
i love the data logging on the mir 1020 makes generating reports for clients so much easier
Matteo_Italy –
perfect for transformer testing the mir 1020 is now our primary instrument
Sam_Rail –
using the mir 1020 for traction power systems it handles the noise very well
Kenji_Japan –
high precision instrument the mir 1020 matches our lab calibration standards perfectly
Diego_Torres –
best value for a 10kv megger the mir1020 does everything the big brands do for half the price
Lars_Wind –
great for wind farm maintenance but carrying the MIR 1020 up a turbine tower is a workout
Elena_Rus –
safe and reliable the voltage warning on the mir_1020 saved my colleague from a mistake
Boris_Power –
mir-1020 is great but i wish it had a bluetooth app like the smaller models still a solid 4 stars
Oliver_Volt –
exceptional performance for the price the mir1020 is a serious tool for serious engineers
John_Sparky_UK –
the 7ma short circuit current really helps stabilize readings on long cable runs mir 1020 is a pro tool
Tech_Solutions_SA –
fast shipping to joburg the MIR_1020 comes in a very solid case and the leads are high quality
Victor_Power –
the MIR 1020 is a beast we use it for testing 11kv cables and the battery lasts all day easy
Hans_Electric –
good interface but the usb software for the mir-1020 looks a bit dated works fine on windows 10 though
Klaus_G –
robust and precise the capacitance measurement on the mir-1020 is a nice bonus feature
Gábor_Hun –
simple to use despite the complex features the mir1020 menu is intuitive
Tuan_VN –
highly recommend the marmonix mir 1020 for any high voltage commissioning work
Sarah_Engineer –
very heavy unit but that is expected for a 10kv tester mir1020 feels bombproof though
Carlos_R –
accurate meter but the instruction manual for the MIR 1020 could be clearer on the filter settings
Yuki_Maintenance –
the auto discharge feature on the mir 1020 is very fast and safe essential for our team
Liam_O_Connor –
the leads are nice and long but the clips on the mir 1020 could be a bit larger for busbars
Chen_Z –
very good anti interference we use the mir_1020 near live 400kv lines and it stays stable
Ali_Dubai_HV –
five stars for the mir 1020 delivery was quick and the unit is top quality
Svetlana_Grid –
mir_1020 performs perfectly in sub zero temperatures reliable and accurate
Francois_M –
we rely on the pi and dar functions daily the marmonix mir 1020 calculates them automatically which saves math time