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The Insulation Resistance Tester MIT420/2 is a CAT IV insulation tester in the MIT400/2 series, designed to accommodate a diverse range of testing applications with exceptional stability and safety.
Insulation Testing: Provides test voltages of 50V, 100V, 250V, 500V, and 1000V. Measurement range extends up to 200GΩ. Stabilized test voltage limits overvoltage to 2%, providing superior accuracy compared to the standard 10-20% industry deviation.
Continuity Testing: Fast continuity checks with single-range auto-ranging from 0.01Ω to 1MΩ. Test current selectable at 200mA or 20mA, featuring automatic lead zero compensation.
Voltage Measurement: Measures true-RMS AC and DC voltages up to 600V with a minimum resolution of 0.1mV. Automatically detects and displays line frequency during voltage measurement.
Diagnostic Insulation Tests: Includes Polarization Index (PI) and Dielectric Absorption Ratio (DAR) functions, crucial for evaluating insulation integrity and diagnosing defects in transformers, motors, and wind turbine generators.
Live Circuit Protection: Inhibits insulation testing if a live circuit is detected. Operators can configure the safety inhibit threshold voltage to 25V, 30V, 50V, 75V, or 100V (default setting is 50V).
Robust Build & Safety Rating: Built to meet CAT IV 600V and CAT III 1000V safety specifications. Encased in an IP54 rated weather-proof housing suitable for demanding environmental conditions.
| Parameter | Specification |
|---|---|
| Insulation Test Voltage | 50V, 100V, 250V, 500V, 1000V; adjustable from 10V to 1000V in 10V steps |
| Insulation Resistance Range | 2GΩ - 200GΩ |
| Continuity Test Range | 0.01Ω - 1MΩ |
| Continuity Test Current | 200mA (0.01Ω - 9.99Ω), 20mA (10.0Ω - 99.9Ω) |
| Voltage Measurement Range | 25 - 600V AC (50/60Hz) or DC |
| Frequency Measurement Range | 15 - 400Hz |
| Capacitance Measurement Range | 0.1nF - 10μF |
| Display Type | LCD, combining analog arc with dual-digital readouts |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -25°C to +70°C |
| Protection Class | IP54 |
| Safety Rating | CAT IV 600V, CAT III 1000V, conforms to EN 61010-1 requirements |
| Battery Type | 5 x AA alkaline or rechargeable Ni-MH batteries |
| Dimensions | 203mm × 148mm × 78mm |
| Weight | Approximately 600g |
Device Dimensions: 203mm × 148mm × 78mm
Device Weight: 600g
Power Supply: Equipped with 5 x AA alkaline or rechargeable Ni-MH batteries.
Shipping Details: Delivery information typically covers standard handling times, protective packaging configurations, and regional shipping protocols tailored to the point of purchase.
The instrument supports standard insulation test voltages of 50V, 100V, 250V, 500V, and 1000V. Additionally, test voltages can be adjusted from 10V up to 1000V in 10V increments.
The feedback-controlled voltage stabilization limits overvoltage to just 2%. This provides much greater precision than standard testers, which typically deviate by 10% to 20%, preventing damage to sensitive components.
The tester features Live Circuit Protection, which blocks insulation testing if a voltage threshold (user-selectable from 25V up to 100V) is detected. It is also rated at CAT IV 600V and CAT III 1000V safety classes.
Polarization Index (PI) and Dielectric Absorption Ratio (DAR) tests are diagnostic tools used to evaluate the long-term quality of insulation materials, particularly in motors, generators, and transformers.
Yes, the MIT420/2 functions with both standard AA alkaline batteries and rechargeable Ni-MH batteries, offering flexible power management in field applications.
The instrument has an IP54 rating, confirming robust dust-proofing and water splash resistance, allowing reliable operation in harsh field conditions.
