Datasheet

MIT300 Series
Insulation and Continuity Testers
In addition the range meets the requirements of IEC 61010-
1 for safe connection to a 440 V Installation Category III
supply (600 V Phase to Earth).
The MIT330 additionally offers the facility to save test
results to internal memory. Over 1000 result can be saved
on site, and downloaded to a computer when convenient.
Data is stored in non-volatile memory, being retained when
the instrument is switched off or batteries are exhausted.
A Job reference number can be selected for a range of
results, allowing separate locations to be tested with the
same tester and easily separated when downloaded.
A memory bar graph acts as a ‘Fuel Gauge’ showing how
much memory has been used
Test results are downloaded to CSV (Coma Separated
Variable) spreadsheets, and can be imported into Microsoft
Excel. If certificates or reports are required, the results
can be downloaded directly into Megger Powersuite
Professional with a range of features for creating
professionally finished documentation.
APPLICATIONS
The MIT300 series has applications in all aspects of
domestic, commercial and industrial electrical contracting,
building maintenance, testing, inspection and servicing.
Combining both Insulation testing and continuity testing,
each instrument caters for all aspects of fixed wiring
installations.
Further applications can be found in panel building, testing
of motors, generators, switchgear and power tools, street
lighting and low volume manufacturing environments etc.
All the MIT300 (except MIT310A) range is supplied with a
full 3 years warranty.
SPECIFICATIONS
Insulation ranges
Nominal Test Voltage
MIT310, 310A, 320, 330 1000 V, 500 V, 250 V (d.c.)
MIT300 500 V, 250 V (d.c.)
Terminal Characteristics
Measuring Range
All instruments 10 kΩ - 999 MΩ on all ranges
Short Circuit Current 1.5 mA nominal
Test Current on Load 1 mA at min. pass values of
insulation (as specified in BS7671,
HD 384 and IEC 364)
Accuracy (at 20 °C)
MIT300, 310, 320, 330 ±3%, ±2 digits up to 10 MΩ, ±5%
up to 100 MΩ, ±30% up to full
scale
MIT310A <2.5% of scale length (or 30% of
reading 200 kΩ to 10 MΩ)
Continuity ranges
Measuring Range: 0,01 Ω - 99,9 Ω (0 -50 Ω on
analogue scale)
Open Circuit Voltage: 5 V ±1 V
Short Circuit Current
MIT300, 310, 320, 330 205 mA +10 mA –5 mA
MIT310A 200 - 250 mA
Accuracy (at 20 °C)
MIT300, 310, 320,330 ±3% ±2 digits
MIT310A ±2.5% of scale length (or 30% of
reading 0.2 Ω to 2 kΩ)
Measuring range 0 - 2/20/200/2 kΩ
Open circuit voltage 1.5 V +/-0.5 V
Zero Offset Adjust:
MIT300, 310,320, 330 0 - 9 Ω
MIT310A 0 - 0.5 Ω
Continuity Buzzer
MIT300, 310 Operates at <5 Ω
MIT320, 330 Adjustable 1 Ω to 20 Ω
MIT310A Operates at <5 Ω
MIT300, 310, 320, 330 Response time <20 ms
MIT310A Response time <100 mS
Resistance range MIT320/330
(can be used for diode testing)
Measuring Range: 10 Ω - 1 MΩ
Open Circuit Voltage: 5 V
Short Circuit Current: 1.5 mA
Accuracy (at 20° C): ±5% ±2 digits up to 100 kΩ
Measuring Range (MIT310A) 0 - 2 kΩ (refer to continuity)
Voltage range
Measuring Range: 0 - 600 V a.c. (50/60 Hz) or d.c.
Accuracy (at 20 °C)
MIT310, 320, 330 d.c. or a.c. (50/60 Hz):
±1%, ±2 digits
MIT310A ±2.5% of scale length for 50/60 Hz
Temperature coefficient: <0,1% per °C on all ranges.
Default voltmeter all modes except off
MIT310, 320, 330 >25 V a.c. or d.c. is applied display
will operate as a voltmeter.
MIT300 Beeps and flash ‘V’ on the display
MIT310A All modes including OFF
Test inhibit: If more than 50 volts is detected,
testing will be inhibited.