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Summary of Contents for Megger MIT300 Series
- Page 1 MIT300 Series Insulation and Continuity Testers USER MANUAL...
- Page 2 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
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) Preparations for use (all instruments) -
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... -
Page 5: Case Contents
CASE CONTENTS MIT300 MIT310 MIT310A MIT320 MIT330 Please complete the warranty card and return it to Megger Limited as soon as possible to help us reduce any delays in supporting you, should Features the need arise. Locking test button Case contents... -
Page 6: Lcd Display
FRONT PANEL (DIGITAL INSTRUMENTS) LCD DISPLAY MIT300, 310, 320 and 330 Multi-fuction Fuse blown Test lead Continuity analogue Warning - refer Insulation test indicator connections indicator range display to user guide ranges LCD Display Voltage Test lock range Battery warning condition indicator Neck strap... -
Page 7: Connection Panel
Connection Panel MIT300 Series test lead connections Memory control keys: Red and black test lead STORE: Store initiates the storing of a test result. Switch probe Connection connections (320 & 300 only) LAST/NEXT: Selects the type of location; ie Job, distribution board, circuit, phase etc. -
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 To maintain user safety and ensure accurate measurements, only use the Any time the warning triangle is displayed the operator should refer to 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)
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)
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: The continuity buzzer has a fast check which looks for a resistance greater To select a threshold value above 5.0 Ω... -
Page 12: Insulation Testing - General
INSULATION TESTING - GENERAL (Refer to page 14 for additional MIT310A notes) To perform an insulation test: Safety note: 1. Turn the instrument ‘On‘ by selecting the desired 250 V, 500 V or 1000 V [MΩ] range. Insulation testing is performed at high DC voltages and could be 2. -
Page 13: Test Lock
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
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
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. condition. -
Page 16: Sp4F Switched (Optional Accessory For Mit320)
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 5. Select the circuit type, R12, RrN, Rr2, Rr1, R2 or R1 by pressing the ↓ 2. Set the tester range knob to [Snd]. keys, then press NEXT. 3. Run Megger Powersuite Professional or Megger Download Manager 6. Select the phase using ↓ keys then press NEXT. The screen will the PC display a unique test number , which is attached to that particular test.
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Page 18: Replacing Batteries And Fuses
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)
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
SPECIFICATIONS Note: For the MIT310A only, the presence of fast transients in excess of Continuity ranges Measuring range: 0.5kV or r.f. in excess of 1 volt on measured circuit may affect the results 0,01 Ω - 100 Ω General Specification (0 -50 Ω... - Page 21 Resistance range (MIT 320 and MIT330 only) Autopower down: Auto power down operates after 10 (can be used for diode testing) minutes if left in standby mode. Measuring range: Environmental 10 Ω - 1 MΩ Operating range: -10 °C to +60 °C Open circuit voltage: Operating humidity: 93% R.H.
- Page 22 Quick start guide 5174-188 All units 980gms CD containing user manual E.M.C. In accordance with IEC61326 -1 Operational uncertainties Refer to www.megger.com Optional Accessories Fused lead set 2 wire fused probe and clip set 1002-015 SP4F Switch probe (MIT320 and MIT330 only)
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Page 23: Accessories And Equipment
RA number. Fax: +44 (0) 1304 207 342 Fax: +1 610 676 8625 5. You may track the progress of your return on line at www.megger.com Megger operate fully traceable calibration and repair facilities, ensuring Approved Service Centres... - Page 24 Megger Instruments Limited described in this user guide is in compliance with Directive 2014/53/EU. Other equipment manufactured by Megger Instruments Limited described in this user guide is in compliance with Directives 2014/30/EU and 2014/35/EU where they apply. The full text of Megger Instruments EU declarations of conformity are...
- Page 25 T +1 416 298 6770 F +1 416 298 0848 E casales@megger.com Megger products are distributed in 146 countries worldwide. This instrument is manufactured in the United Kingdom. The company reserves the right to change the specification or design without prior notice.
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