A calibration by Custom-Cal is performed by engineers with extensive OEM experience. We have the expertise and the necessary standards to perform the MEGGER MIT420 Calibration, onsite calibration may be available. We specialize in quick turnaround times and we can handle expedited deliveries upon request.


   MEGGER MIT420   Description / Specification:    
MEGGER MIT420 50-1000V Insulation, Continuity and Capacitance Tester

The Megger MIT420 insulation and continuity tester offers those working in electrical engineering, the electrical supply industry and in maintenance, repair and servicing of industrial equipment and manufacturing processes a convenient test instrument.

Nominal test voltages: 50 V, 100 V, 250 V, 500 V, 1000 V.
Range full scale accuracy: All ranges ±2% ±2 digits up to 100 MΩ.
Short circuit current: 2 mA +0% -50%.
Terminal voltage: -0% +20% ±1 V (Ii <1 mA).
Test current on load: 1 mA at min. pass value of insulation specified in BS7671, HD384 and IEC364, EN61152-2, 2 mA max.
EN61557 operating range: 0,10 MΩ to 1,00 GΩ.
Leakage current range: 10 μA to 2000 μA.
Leakage current: 10% ±3 digits.
Voltage display: 3% ±3 digits ±0.5% of rated voltage.
Polarization Index (PI): 10 min / 1 minute ratio.
Dielectric absorption Ratio (DAR): 60 sec / 30 sec ratio.

EN61557 operating range: 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: 5 V ± 1 V.
Test current: 205 mA (±5 mA) (0.01 Ω to 9.99 Ω), 20 mA (±1 mA) (10.0 Ω to 99.9 Ω).
Zero offset at probe tips: 0, 10 Ω typical.
Lead resistance zeroing: Up to 9, 99 Ω.
Buzzer: Variable limit 1 Ω, 2 Ω, 5 Ω, 10 Ω, 20 Ω.

EN61557 operating range: 0, 01 k Ω to 1000 k Ω (0 to 1 M Ω on analogue scale).
Accuracy: ±3% up to 50 k Ω then ±5% ±2 digits.
Open circuit voltage: 5 V ±1 V.
Short circuit current: 1.5 mA ±0.2 mA.

Voltage range.
0 to 600 V d.c. ± 2% ± 2 digits.
10 mV to 600 V TRMS sinusoidal (40 - 400 Hz) ±2% ±2 digits.

Default Voltmeter.
Operates at >25 volts a.c. or d.c., on any range except OFF.
Frequency: 15-400Hz (15Hz - 99,9Hz) ±0.5% ±1 digit (100Hz to 400Hz).

Capacitance measurement.
Measurement range: 100 pF to 10 μF.
Accuracy: ±5.0% ±2 digits.
Distance by capacitance: Arithmetic conversion from capacitance measurement.
Default capacitance distance measurement: 50 nF/km.
Capacitance range: 40 nF/km to 60 nF/km.


Standard Calibration $275.00 *
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*This is a Web introductory price for one calibration of the MEGGER MIT420. Price does not in most cases include measurement performance data. Pricing does include NIST traceable calibration and issue of a calibration certificate and calibration label. Pricing may vary slightly due to volume and location of laboratory supporting calibration. Volume pricing may apply. On-site fees may apply depending on logistics, location and volume of work to be completed during the visit.

Related Bench Equipment Terms and Definitions. For a complete list go to our  Terms and Definitions Page.

dBm (sometimes dBmW) is an abbreviation for the power ratio in decibels (dB) of the measured power referenced to one milliwatt (mW). Zero dBm equals one milliwatt. A 3 dB increase represents roughly doubling the power, a 3 dB decrease, the power is reduced by about one half.

Millimeter-wave is a term that generally refers to frequencies of 26.5 GHz and above. That is where signal wavelengths fall below approximately 10 mm, and thus the terminology changes from centimeters to millimeters.

Power Repeatability
Power Repeatability is the random uncertainty in reproducing the power level after changing and re-setting the power level. The power repeatability is ± half the span (in dB) between the highest and lowest actual power. Note: - The long-term power repeatability can be obtained by taken the power repeatability and power stability into account.

Stability is the extent to which a specified property, characteristic, or parameter of a substance, device, or apparatus, remains fixed with the passage of time or with varying environmental conditions.

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