Megger MIT400 Series - Instrument Specifications; Insulation Specifications; Continuity and Resistance Specifications

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19. Specification
All quoted accuracies are at +20 °C.
Insulation
Nominal test voltages
MIT400, 405 250 V, 500 V, 1000 V
MIT410, 420,430 50 V, 100 V, 250 V, 500 V, 1000 V
MIT480 50 V, 100 V
MIT481, 485 50 V, 100 V, 250 V, 500 V, 1000 V
MIT40X 10 V to 100 V variable (1 V increments)
Range full scale accuracy (Model dependant)
All ranges ±2% ±2 digits up to 100 M.
Then: 1000 volts ±3% ±2 digits ±0.2% per G
500 volts. ±3% ±2 digits ±0.4% per G
250 volts. ±3% ±2 digits ±0.8% per G
100 volts. ±3% ±2 digits ±2.0% per G
50 volts. ±3% ±2 digits ±4.0% per G
Analogue range 1 G full scale
Analogue range: 1 G full scale
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 M to 1,00 G
Leakage current range: 10 μA to 2000 μA
Leakage current: 10% ±3 digits
Voltage display: 3% ±3 digits ±0.5% of rated voltage
Polarisation Index (PI): 10min / 1minute ratio
Dielectric absorption Ratio (DAR): 60sec / 30sec ratio
Notes:
(1) All ranges measure from 0,00 M upwards.
(2) Above specifications only apply when high quality silicone leads are being used.
Continuity
EN61557 operating range:
0,01  to 99,9  (0 to 100  on analogue scale)
Accuracy:
± 2% ± 2 digits (0 to 100 )
Open circuit voltage:
5 V ± 1 V
Test current:
205 mA (±5 mA) (0.01  to 9.99 )
20 mA (±1 mA) (10.0  to 99.9 )
Zero offset at probe tips:
0,10  typical
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