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MIT300 Series
Insulation and Continuity Testers
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Megger MIT300-EN MIT 300 EN Insulation Resistance Continuity Tester
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Megger MIT310A-EN MIT 310A EN Insulation Resistance Continuity Tester
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Megger MIT310-EN MIT 310 EN Insulation Resistance Continuity Tester
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Megger MIT320-EN MIT 320 EN Insulation Resistance Continuity Tester
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Megger MIT330-EN MIT 330 EN Insulation Resistance Continuity Tester
USER MANUAL
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Summary of Contents for Megger MIT310
- Page 1 Megger MIT300-EN MIT 300 EN Insulation Resistance Continuity Tester ____________________________________________________________ Megger MIT310A-EN MIT 310A EN Insulation Resistance Continuity Tester __________________________________________________________ Megger MIT310-EN MIT 310 EN Insulation Resistance Continuity Tester __________________________________________________________ Megger MIT320-EN MIT 320 EN Insulation Resistance Continuity Tester __________________________________________________________...
- Page 2 www.netzerotools.com SAFETY WARNINGS Safety Warnings and Precautions must be read and understood before the instrument is used. They must be observed during use. The circuit under test must be switched off, de-energised and isolated before test connections are made when carrying out insulation and continuity tests.
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Page 3: Table Of Contents
www.netzerotools.com CONTENTS Safety warnings Insulation testing Introduction Test lock General description SP4F Switched (optional accessory for MIT320) Case contents Test result storage (MIT330 only) LCD display Replacing batteries and fuses Front panel (digital instruments) Low battery warning symbol Connection panel To replace batteries Lid open/closure Fuse replacement (user replaceable) -
Page 4: Safety Warnings
INTRODUCTION GENERAL DESCRIPTION Thank you for purchasing the Megger Insulation Tester. The MIT300 series variants have the following features: For your own safety and to get the maximum benefit from your MIT300 MIT310 MIT310A MIT320 MIT330 instrument, please ensure that you read and understand the following Insulation testing safety warnings and instructions before attempting to use the instruments. -
Page 5: Case Contents
CASE CONTENTS Please complete the warranty card and return it to Megger Limited as soon MIT300 MIT310 MIT310A MIT320 MIT330 as possible to help us reduce any delays in supporting you, should the Features need arise. Locking test button... -
Page 6: Lcd Display
www.netzerotools.com FRONT PANEL (DIGITAL INSTRUMENTS) LCD DISPLAY MIT300, 310, 320 and 330 MIT310A Test Lock LED Moving coil Analogue Test lead null display indication Battery check Battery condition Voltage warning LED indication www.netzerotools.com... -
Page 7: Connection Panel
www.netzerotools.com Connection Panel Memory control keys: MIT300 Series test lead connections STORE: Store initiates the storing of a test result. LAST/NEXT: Selects the type of location; ie Job, distribution board, circuit, phase etc. ESC: Aborts a save at any time. Final operation to save the result. -
Page 8: Preparations For Use (All Instruments)
PREPARATIONS FOR USE (ALL INSTRUMENTS) Batteries Safety note: The Megger MIT300 series of instruments are supplied with batteries If a voltage greater than 25 V appears on the circuit under test the fitted. When batteries become exhausted, refer to page 18, battery instrument will default to a voltage measurement and display the replacement. -
Page 9: Test Lead Connection
Refer to user manual cables. To maintain user safety and ensure accurate measurements, only Any time the warning triangle is displayed the operator should refer to use the test leads supplied by Megger Limited. the user manual for further information. Range lock Displayed at any time the [TEST] button is locked in the on position. -
Page 10: Continuity Measurement (Mit300, 310, 320, 330)
www.netzerotools.com CONTINUITY MEASUREMENT (MIT300, 310, 320, 330) All continuity measurements are AUTO ranging from 0.00 Ω to 100 Ω on 4. The display shows the resistance value. (Maximum 99,9 Ω) Digital/analogue scale). 5. Disconnect the test probes to terminate the test. The MIT310A has manual range selection to 2 kΩ. -
Page 11: Continuity Buzzer (Mit300, 310, 320, 300)
www.netzerotools.com CONTINUITY BUZZER (MIT300, 310, 320, 330) (See page 15 for MIT310A) 4. When the display reaches the desired value release the [TEST] button 5. Press the button to store the value Continuity buzzer mode: To select a threshold value above 5.0 Ω The continuity buzzer has a fast check which looks for a resistance greater than 1.0 MΩ... -
Page 12: Insulation Testing - General
www.netzerotools.com INSULATION TESTING - GENERAL (Refer to page 14 for additional MIT310A notes) To perform an insulation test: 1. Turn the instrument ‘On‘ by selecting the desired 250 V , 500 V or 1000 V Safety note: [MΩ] range. Insulation testing is performed at high DC voltages and could be 2. -
Page 13: Test Lock
www.netzerotools.com Insulation test MΩ alarm ON/OFF (MIT320/MIT330 only) 6. Press the button to store the value. The buzzer can be enabled or disabled for working in office environments. The instrument will now beep every time an insulation test is To enable the buzzer: performed, and the measured value is greater than the threshold value set. -
Page 14: Ac / Dc Voltage Measurement
www.netzerotools.com AC / DC VOLTAGE MEASUREMENT ANALOGUE INSTRUMENT MIT310A If a voltage greater than 2 V a.c. or d.c. is present at the terminals the Additional notes: measured voltage is indicated on the display. If the fuse is blown the Battery Level = Exhausted battery voltmeter will still operate - see note 1. -
Page 15: Continuity Test
www.netzerotools.com test should be performed with the leads shorted together or the battery 2. Wait for the reading to stabilise and adjust the lead null knob until test mode should be selected to ensure the batteries are in good working the display pointer indicates 0 Ω. -
Page 16: Sp4F Switched (Optional Accessory For Mit320)
www.netzerotools.com SP4F SWITCHED ( TEST RESULT STORAGE (MIT330 only) ACCESSORY FOR MIT320/MIT330 The SP4F switch probe allows the user to start a test by pressing the Storing contintuity test results: [TEST] button on the probe, instead of the instrument. This allows for Results storage has the following structure: complete hands free testing and increases user safety. - Page 17 2. Set the tester range knob to [Snd]. 6. Select the phase using ↑↓ keys then press NEXT. The screen will 3. Run Megger Powersuite Professional or Megger Download Manager on display a unique test number , which is attached to that particular test.
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Page 18: Replacing Batteries And Fuses
www.netzerotools.com REPLACING BATTERIES AND FUSES WARNING: This operation is not reversible. All data will be deleted. Batteries Battery type: 8 x LR6 (AA), 1.5 V Alkaline, or 8 x 1.2V NiCAD, or 8 x 1.2V NiMH Fuse type: 500 mA (F) HBC 50 kA 600 V Fuse blown symbol Low battery warning symbol The battery condition is continuously displayed by the symbol... -
Page 19: Fuse Replacement (User Replaceable)
www.netzerotools.com PREVENTIVE MAINTENANCE Warning: - Incorrect battery cell polarity can cause electrolyte leakage, The MIT series instruments require very little maintenance. resulting in damage to the instrument. If the battery condition indicator Test leads should be checked before use to ensure there is no damage. does not show a full charge when battery cells are new, a cell may be reversed. -
Page 20: Technical Specification
Insulation ranges Open circuit voltage: 5 V ±1 V Nominal test voltage: 1000 V , 500 V , 250 V (d.c.) MIT310, 310A, 320, 330 205 mA +10 mA -5 mA Short circuit current: MIT300 500 V , 250 V (d.c.) Accuracy (at 20°... - Page 21 500 mA (F) 600 V , 32 x 6 mm ceramic all test modes except off HBC 50 kA minimum. MIT310, 320, 330 voltmeter:>25 V a.c. or d.c. is applied display will Safety operate as a voltmeter Meets the requirements of IEC61010-1 Cat III 600 V phase to earth. Refer to safety warnings supplied.
- Page 22 www.netzerotools.com Weight All units 980gms E.M.C. In accordance with IEC61326 -1 www.netzerotools.com...
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Page 23: Accessories And Equipment
Download Manager CD 6111-442 Quick start guide 5174-188 CD containing user manual Optional Accessories Fused lead set 2 wire fused probe and clip set 6220-789 SP4F Switch probe (MIT320 and MIT330 only) 6220-809 Megger Certification Software Powersuite Pro-Lite 16th www.netzerotools.com... -
Page 24: Repair And Warranty
www.netzerotools.com REPAIR AND WARRANTY The instrument contains static sensitive devices, and care must be taken in handling the printed circuit board. If an instrument’s protection has been impaired it should not be used, but sent for repair by suitably trained and qualified personnel.
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