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Megger MIT481 Telecom Insulation and Continuity Tester
The upgraded version of Megger's MIT480, the MIT481 has wider measurement range, plus additional features that make it superior to the entry-level product in Megger's MIT480 series.
A portable, easy-to-use and accurate insulation tester specifically designed for use in the telecommunications industry, the MIT481 can test insulation using test voltages of 50 - 100V (also available on the MIT480) and also has exclusive-to-this-model test voltages of 250V and 500V. This gives the MIT481 wider insulation measurement range up to 200GΩ, a vast improvement on the MIT480's 10GΩ.
With the MIT481 in hand you can also test frequency levels from 15 to 400Hz, capacitance from 0.1nF to 10μF and true RMS AC voltage to 600V. A built-in continuity test is also included with variable current limit of 200mA/20mA, fast buzzer with selectable threshold and kΩ range to 999kΩ.
Perhaps the most major difference between this product and the MIT480 is the inclusion of on-board memory. This feature allows the user to store up to 1000 records directly on the tester, making it much easier to keep track of your records (please note that the MIT481 is non-downloadable; the upgraded version, the MIT485, comes with Bluetooth download).
The table below outlines the difference between each model in the Megger MIT480 series.
| Model | 480 | 481 | 485 |
|---|---|---|---|
| Insulation Voltage Range | |||
| 50 - 100V | √ | √ | √ |
| 250V, 500V, 1000V | - | - | √ |
| Insulation Range | 10GΩ | 200GΩ | 200GΩ |
| Leakage Current Display | - | √ | √ |
| INS Test Voltage Display | √ | √ | √ |
| Live Circuit Warning at 75V | √ | √ | √ |
| Continuity Measurement | |||
| Variable Current Limit (200mA/20mA) | √ | √ | √ |
| Fast Buzzer - Selectable Threshold | √ | √ | √ |
| kΩ range to 999kΩ | - | √ | √ |
| Voltage Measurement | |||
| Default Voltmeter | √ | √ | √ |
| TRMS measurements to 600V | √ | √ | √ |
| Other Measurement | |||
| Frequency (Hz - 15 to 400Hz) | - | √ | √ |
| Capacitance (0.1nF to 10μF) | - | √ | √ |
| Distance by Capacitance | - | √ | √ |
| Additional Features | |||
| Result Storage | - | √ | √ |
| Bluetooth Download | - | - | √ |
| Backlight | √ | √ | √ |
| Battery Condition Display | √ | √ | √ |
| Insulation Timed - PI - DAR Tests | - | √ | √ |
| Test Button Plus Lock Button | √ | √ | √ |
| TNV 3 Circuits | √ | √ | √ |
Megger MIT481 Telecom Insulation & Continuity Tester Key Features
- Selectable test voltages of 50V, 250V, and 500V
- Insulation measurement range of 200GΩ
- Leakage current display
- INS test voltage display
- Live circuit warning when it reaches 75V
- Continuity testing with 200mA/20mA varibale current and selectable buzzer threshold
- Measure voltage to 600V (true RMS)
- Frequency measurements from 15 to 400Hz
- Capacitance measurements from 0.1nF to 10μF
- Integrated memory can store up to 1000 records
- Ergonomically-designed tester designed to fit comfortably in the hand
- Backlit for use in poor lighting conditions
- Battery condition display
- Insulation timed PI and DAR tests
- Test button plus lock button
What's Included?
- Megger MIT481 Telecom Insulation & Continuity Tester
- Red/Black Silicone Lead Set with Clips
- Protective Rubber Casing
- Remote Switch Probe
- Calibration Certificate
- Batteries
Megger MIT480 Series Technical Specifications
(All quoted accuracies are at +20°C)
| Insulation | |
|---|---|
| Nominal Test Voltages |
MIT480: 50V, 100V MIT485: 50V, 100V, 250V, 500V and 1000V |
| Insulation Resistance Range | MIT480: 10GΩ MIT481, 485: 200GΩ |
| Range Full Scale Accuracy (All ranges are ±2% ±2 digits up to 100MΩ | Then: 1000 volts ±3% ±2 digits ±0.2% per GΩ 500 volts. ±3% ±2 digits ±0.4% per GΩ 250 volts. ±3% ±2 digits ±0.8% per GΩ 100 volts. ±3% ±2 digits ±2.0% per GΩ 50 volts. ±3% ±2 digits ±4.0% per GΩ Analogue range 1 GΩ full scale |
| Short Circuit Current | 2mA +0% -50% |
| Terminal Voltage | -0% + 20% ±1V |
| Test Current On Load | 1 mA at min. pass value of insulation specified in BS7671, HD384 and IEC364, 2 mA max. |
| EN61557 Operating Range | 0.10 MΩ to 1.00 G |
| Leakage Current Range | 10μA to 2000μA |
| Leakage Current | 10% ± 3 digits |
| Voltage Display | 3% ± 3 digits ±0.5% of rated voltage |
| Polarisation Index (PI_ | 10min / 1 minute ratio |
| Dielectric Absorption Ratio (DAR) | 60 sec / 30 sec ratio |
| Notes | (1) All ranges measure from 0,00 MΩ upwards. (2) Above specifications only apply when high quality silicone leads are being used. |
| Continuity | |
| Measurement | 0,01 Ω to 99,9 Ω (0 to 100 Ω on analogue scale) |
| Accuracy | ±2% ±2 digits (0 to 100 Ω) |
| Open Circuit Voltage | 5V ±1V |
| Test Current | 205 mA (–0 mA +20 mA) (0.01 Ω to 9.99 Ω) 20mA (±1 mA ) (10.0 Ω to 99.9 Ω) |
| Zero Offset at Probe Tips | 0,10 Ω typical |
| Lead Resistance Zeroing | Up to 9,99Ω |
| Buzzer | Variable limit 1 Ω, 2 Ω, 5 Ω, 10 Ω, 20 Ω |
| Resistance | |
| Measurement | 0,01 kΩ to 1000 kΩ (0 to 1 MΩ on analogue scale) |
| Accuracy | ±3% ±2 digits up to 50 kΩ then ±2 digits |
| Open Circuit Voltage | 5 V ±1 V |
| Short Circuit Current | 1.5 mA ±0.2 mA |
| Voltage Range | |
| Ranges | 0 to 600 V d.c. ±2% ±2 digits 10 mV to 600 V TRMS sinusoidal (40 to 400 Hz) ±2% ±2 digits 0 to 1000 V on Analogue scale Unspecified input level 0 - 10 mV (40 to 400 Hz) |
| For Non-Sinusoidal Waveforms Additional Specifications Apply | ±3% ±2 digits 101 mV to 600 V TRMS and ±8% ±2 digits 10 mV to 100 mV TRMS |
| Default Voltmeter | Operates at >25 V a.c. or d.c. on any range except OFF |
| Frequency | 40-450 Hz (40 Hz - 99,9 Hz) ±0.5% ±1 digit (100 Hz to 450 Hz) |
| Capacitance Measurements (MIT481 and MIT485 only) | |
| Measurement Range | 100 pF to 10 μF |
| Accuracy | ± 5.0% ±2 digits |
| Distance by Capacitance | Arithmetic conversion from capacitance measurement on Default capacitance measurement: 50nF/km |
| Capacitance Range | 40 nF/km to 60 nF/km |
| Result Storage | |
| Capacity | >1000 test results |
| Download | Bluetooth wireless |
| Bluetooth Class | Class II |
| Range | Up to 10m |
| General Specs | |
| Power Supply | 5 x 1.5 V cells type IEC LR6 (AA, MN1500, HP7, AM3 R6HP) Alkaline NiMH rechargeable cells may be used. |
| Battery Life | 2200 insulation tests with duty cycle of 5 sec ON /55 sec OFF @ 1000 V into 1 MΩ |
| Dimensions | Instrument: 220 x 92 x 50mm Instrument + Case: 45 x 178 x 89mm |
| Weight | Instrument only: 590g (775g with boot) Instrument + Case: 1.75kg |
| Fuse | Use only a 500 mA (FF) 1000 V 32 x 6 mm ceramic fuse of high breaking capacity HBC 50 kA minimum. Glass fuses MUST NOT be fitted. |
| Safety Protection | The instruments meet IEC 61010-1 to 600 V phase to earth, Category IV. Refer to safety warnings supplied. |
| E.M.C | In accordance with IEC 61326-.1 |
| Temperature Coefficient | <0.1% per °C up to 1 GΩ |
| Operating Range | -20 to +55°C |
| Operating Humidity | 95% RH at 0ºC to +35ºC, 70% RH @ +35ºC to +55ºC |
| Storage Temperature Range | -30 to +80°C |
| Calibration Temperature | +20°C |
| Max Altitude | 2000m |
| Dust and Water Protection | IP54 Protected against dust and splashing water |
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Additional Information
| SKU | MEGIT16 |
|---|---|
| Manufacturer Part Code | 1004-741 |
| Model Ref | MIT481 |
| Country of Origin | United Kingdom |
