Model: MIT420/2
Part Number: 1004-739
The MIT400/2 Series insulation and continuity testers are designed for electrical and industrial testing. In addition, they have an exceptionally wide range of applications in electrical installations, cable testing, motor testing, automotive, ESD, panel building, avionics, maintenance etc.
Insulation testing has been enhanced with feedback-controlled test voltages to limit over-voltage to 2%, rather than the industry standard 10-20%.
A variable range has been added to allow any intermediate voltage from 10 V to 1000 V in 1 V steps, where application specific test voltages are required that do not appear in the standard ranges.
Continuity testing is now 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.
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.
Specifications
Test Voltage: 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
Display Range: Analogue: 1 GΩ full scale
Resolution: 0.1 kΩ
Short Circuit/Charge Current: 2 mA +0% -50% to EN 61557-2 (2007) (except MIT2500: 1 mA into 2.5 MΩ)
Open Circuit Voltage Insulation: -0% +2% ±2 V
Test Current: 1 mA at min. pass value of insulation to a maximum of 2 mA max.
Leakage: 10% ± 3 digits
Voltage: 3% ± 3 digits ± 0.5% of rated voltage
Continuity Measurement: 0.01 Ω to 999 kΩ (0 to 1000 kΩ on analogue scale)
Continuity Accuracy:
± 3% ± 2 digits (0 to 100 Ω )
±5% ±2 digits (>100 Ω - 500 kΩ)
(>500 kΩ - 1 MΩ unspecified)
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
mA Range and Accuracy:
AC: 10.0 mA - 500 mA: +/-5%, +/-2 digits (15 Hz - 400 Hz, sinusoidal)
DC: 0.0 mA - 500 mA: +/-5%, +/-2 digits
Voltage Range:
AC: 10 mV to 600 V TRMS sinusoidal (15 Hz to 400 Hz)
DC: 0 to 600 V
Voltage Range Accuracy:
AC: ±2% ±1 digit
DC: ±2% ±2 digit
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 Measurement Range: 15-400 Hz
Frequency Measurement Accuracy: ±0.5% ± 1 digit (100 Hz to 400 Hz) unspecified
