The MIT400/2 series of CAT IV insulation and continuity testers have been designed for use in an exceptionally wide range of applications including electrical installations, cable testing, motor testing, automotive, ESD, panel building, avionics and maintenance.


The MIT400/2 series enhances insultation testing with feedback-controlled test voltages to limit overvoltage to 2 %, rather than the industry standard 10 to 20 %. Additionally, a variable range has been added to allow any intermediate voltage from 50 V to 1000 V in 10 V steps, where application-specific test voltages are required that do not appear in the standard ranges.


Replacing the original MIT400 instruments, the new units feature a redesigned case, back stand, and 6 cell battery compartments with separate fuse access. All instruments are over-moulded for increased protection and achieve an IP54 weatherproof rating. What's more, the MIT400/2 makes continuity testing significantly faster, and a single auto-ranging 0.01 Ω to 1.0 MΩ function replaces the 'ohms' and 'kOhms' ranges. Retained are the 200 mA and 20 mA test options.


The range consists of four instruments:

  • MIT400/2: 250 V, 500 V and 1000 V
  • MIT410/2: 50 V, 100 V, 250 V, 500 V and 1000 V + Polarisation index, dielectric absorption ratio
  • MIT420/2: 50 V, 100 V, 250 V, 500 V and 1000 V + Polarisation index, dielectric absorption ratio, variable test voltage and result storage
  • MIT430/2: 50 V, 100 V, 250 V, 500 V and 1000 V + Polarisation index, dielectric absorption ratio, variable test voltage and Bluetooth download

Insulation

Test voltage:

MIT400/2: 250 V, 500 V, 1000 V

MIT410/2, 420/2,430/2: 50 V, 100 V, 250 V, 500 V, 1000 V

Insulation accuracy

50 Volts | 10 GΩ ± 2% | ± 2 digits ± 4.0% per GΩ

100 Volts | 20 GΩ ± 2% | ± 2 digits ± 2.0% per GΩ

250 Volts | 50 GΩ ± 2% | ± 2 digits ± 0.8% per GΩ

500 Volts | 100 GΩ ± 2% | ± 2 digits ± 0.4% per GΩ

1000 Volts | 200 GΩ ± 2% | ± 2 digits ± 0.2% per GΩ


50V, ± 2.0% ± 2d, 100 kΩ - 900 kΩ ± 10.5%

100V, ± 2.0% ± 2d, 100 kΩ - 900 kΩ ± 10.3%

250V, ± 2.0% ± 2d, 100 kΩ - 900 kΩ ± 10.3%

500V, ± 2.0% ± 2d, 100 kΩ - 900 kΩ ± 10.3%

1000V, ± 2.0% ± 2d, 100 kΩ - 900 kΩ ± 11.5%


Display range: Analogue: 1 GΩ full scale

Resolution: 0.1 kΩ

Short circuit/charge current: 2 mA +0% -50% to EN 61557-2 (2007)

Open circuit voltage insulation: -0% +2% ± 2V

Test current: 1 mA at min. pass value of insulation to a maximum of 2 mA max


Leakage (not MIT400/2): 10% ±3 digits

Voltage: ±3% ±2 digits ±0.5% of rated voltage

Timer control(not MIT400/2): 60 second countdown timer


Continuity

Continuity measurement: 0.01 Ω to 1000 kΩ 

Continuity accuracy: 

±3% ±2 digits (0 to 100 Ω )

±5% ±2 digits (100 Ω - 500 kΩ)

Service Error: BS EN 61557-4 (2007) -±2.0%, 0.1 Ω - 2 Ω ±6.8%

Open circuit voltage: 5 V ± 1 V

Test current: 200 mA (–0 mA +20 mA) (0.01 Ω to 4 Ω)

Polarity: Single polarity (Default) / Dual polarity (configurable on setup).

Lead resistance: Null up to 9.00 Ω


Voltage range

Voltage range: 

DC: 0 to 600 V

AC: 10 mV to 600 V TRMS sinusoidal (15 Hz to 400 Hz)

Volt range accuracy: 

AC: ±2% ±1 digit

DC: ±2% ±2 digits

Service Error: BS EN 61557-1 (2007) -±2.0% ±2d, 0 V 300 V AC/DC ±5.1%

Waveform: 

Unspecified range: 0 – 10 mV (15 to 400 Hz)

For non-sinusoidal waveforms additional specifications apply

Non-sinusoidal waveforms:

±3% ± 2 digits >100 mV to 600 V TRMS

±8% ± 2 digits 10 mV to 100 mV TRMS


Frequency (not MIT400/2)

Frequency measurement range: 15 Hz - 400 Hz

Frequency measurement accuracy: ±0.5% ±1 digits 100 Hz to 400 Hz unspecified)


Capacitance measurement

Capacitance range: 1 nF to 10 μF

Accuracy: ±5.0% ± 2 digits ( 0.1 nF - 1 nF)

MIT400/2_datasheet


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