Industrial Insulation Testers
工業絕緣測試儀
Model : MIT400
The MIT400 of 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.
It is also very useful for the checking of the electrical system in hybrid and electric vehicles. the safety and comfort of a modern purpose designed instrument.
* Specification
Insulation
Nominal test voltages
MIT400 250 V, 500 V, 1000 V
Insulation resistance range (at maximum test voltage)
MIT400 20 GΩ
Short Circuit Current:
2 mA +0% -50%
Terminal voltage: -0% +20% ±1 V
MIT40X ±1 V
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 GΩ
Leakage current range: 10 μA 2000 μA
Leakage current: 10% ±3 digits
Voltage display: 3% ±3 digits ±0.5% of rated voltage
Polarisation Index (PI): 10 min / 1minute ratio
Dielectric Absorption Ratio (DAR): 60 sec / 30 sec ratio
Range Full Scale Accuracy
All ranges ±2% ±2 digits up to 100 MΩ.
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
10 volts ±3% ±2 digits ±2.0% per 100 MΩ
Analogue Range: 1GΩ full scale
Notes
- All ranges measure from 0,00 MΩ upwards.
- 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: 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
Voltage range
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 specification 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: 15 – 450 Hz ±0.5% ±1 digit
Result storage
Capacity: >1000 test results
Download: Bluetooth wireless
Bluetooth Class: Class II
Range: up to 10 m
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 50 mm (8.66 in. x 3.63 in. x
1.97 in.)
Instrument + case 456 x 178 x 89 mm (18 in. x 7 in. x 3.5
in.)
Weight
Instrument only 590 gms; 775 gms with boot (20.73 oz;
27.22 oz)
Instrument plus case 1.75kg (3.86 lb)
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.
Over-voltage safety
category
The instruments meet IEC 61010-1 to
600 V phase to earth, Category IV. Refer
to safety warnings supplied.
EMC In accordance with IEC 61326-1
Temperature effects
Temperature coefficient
<0,1% per °C up to 1 GΩ
Operating
temperature range
and humidity
-20 to +55 °C
95% RH at 0 °C to +35 °C, 70% RH @
+35 °C to +55 °C
Storage temperature
range and humidity
-30 °C to +80 °C
Calibration
temperature
+20 °C
Maximum altitude 2000 m
IP rating IP54
Service error
Insulation range ±15% ±2 digits
Continuity range ±26% ±2 digits
Resistance range ±12% ±2 digits
Voltage range ±10% ±2 digits
Capacitance range ±18% ±2 digits
Frequency range ±5% ±2 digits
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