Megger MFT-X1 User manual

User Guide
MFT-X1
Multifunction tester

This document is copyright of:
Megger Limited, Archcliffe Road, Dover, Kent CT17 9EN. ENGLAND
T [phone] F [phone] www.megger.com
Megger Ltd reserves the right to alter the specification of its products from time to time without notice.
Although every effort is made to ensure the accuracy of the information contained within
this document it is not warranted or represented by Megger Ltd. to be a complete and
up-to-date description.
For Patent information about this instrument refer to the following web site:
megger.com/patents
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Declaration of Conformity
Hereby, Megger Instruments Limited declares that radio equipment manufactured by 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 available at the following internet address:
megger.com/eu-dofc
This manual supersedes all previous issues of this manual. Please ensure that you are using the most recent issue of this
document. Destroy any copies that are of an older issue.
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Contents
1. Introduction .....................................................................................................................................10
1.1 Product description ...................................................................................................................................10
1.2 Features......................................................................................................................................................11
1.3 Company web site .....................................................................................................................................11
2. Safety Warnings ..............................................................................................................................12
2.1 Warnings, Cautions and Notes .................................................................................................................12
2.2 Safety warnings .........................................................................................................................................12
2.2.1 Earth test warnings ..................................................................................................................................13
2.2.2 Li-ION battery module warnings ...............................................................................................................14
2.2.3 Li-ION battery care ...................................................................................................................................14
2.3 Product safety category – measurement connection..............................................................................14
2.3.1 Safety category voltage ............................................................................................................................14
2.3.2 CAT IV ..................................................................................................................................................... 14
2.3.3 CAT III ...................................................................................................................................................... 14
2.3.4 CAT II.......................................................................................................................................................14
2.4 Safety, Hazard and Warning symbols on the instrument.......................................................................15
2.5 Warning icons............................................................................................................................................15
2.5.1 Connection terminals ...............................................................................................................................15
3. Getting started ................................................................................................................................16
3.1 Quick start (for those in a hurry)..............................................................................................................16
4. Instrument Controls .......................................................................................................................17
4.1 Instrument layout......................................................................................................................................17
4.2 Instrument display.....................................................................................................................................18
4.2.1 Colour coded backgrounds ......................................................................................................................18
4.2.2 High contrast mode ................................................................................................................................19
4.3 Instrument controls ...................................................................................................................................19
4.3.1 The left-hand rotary knob ........................................................................................................................19
4.3.2 The right-hand rotary knob .....................................................................................................................19
4.3.3 Information bar........................................................................................................................................ 20
4.3.4 Test lead connection guide .......................................................................................................................21
4.3.5 Voltage widget......................................................................................................................................... 22
4.3.6 Analogue arc............................................................................................................................................22
5. Operation.........................................................................................................................................23
5.1 Switching on and off.................................................................................................................................23
5.1.1 Auto power off (sleep function)................................................................................................................24
5.2 Test inhibit – general inhibits ................................................................................................................... 24
6. Dead circuit tests.............................................................................................................................25
6.1 General.......................................................................................................................................................25
6.2 Protection against accidental damage..................................................................................................... 25
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7. Continuity testing and resistance measurement ..........................................................................26
7.1 General information ................................................................................................................................. 26
7.1.1 Basic functions .........................................................................................................................................26
7.1.2 Test inhibit .............................................................................................................................................. 27
7.1.3 Hot keys for continuity checking and resistance measurement.................................................................. 27
7.2 Continuity testing......................................................................................................................................28
7.3 Test lead null..............................................................................................................................................29
7.3.1 To null a test lead: ....................................................................................................................................29
7.3.2 To check the lead null value......................................................................................................................30
7.3.3 To remove a test-lead null:........................................................................................................................30
7.3.4 To update a test-lead null value ................................................................................................................30
7.3.5 Lead null errors ........................................................................................................................................30
7.4 Buzzer mode up to 2 kΩ (1 kΩ on analogue scale)................................................................................. 31
8. Insulation testing ............................................................................................................................32
8.1 General.......................................................................................................................................................32
8.2 Test starting timer ..................................................................................................................................... 32
8.2.1 Insulation test-inhibit................................................................................................................................32
8.3 Hot keys for insulation tests .....................................................................................................................33
8.4 All insulation tests .....................................................................................................................................33
8.5 Insulation testing.......................................................................................................................................34
8.6 Insulation test with test lock.....................................................................................................................35
9. Earth resistance measurement .......................................................................................................37
9.1 General.......................................................................................................................................................37
9.1.1 Earth testing inhibit.................................................................................................................................. 37
9.1.2 Two-pole earth resistance measurements..................................................................................................38
9.2 Hot keys for earth resistance measurement ............................................................................................38
9.3 Two-pole (2P) earth resistance measurements ........................................................................................39
10. Live circuit tests.............................................................................................................................40
10.1 General.....................................................................................................................................................40
10.2 Warning indication..................................................................................................................................40
10.3 Auto-start (hands-free) option ...............................................................................................................40
10.4 Protective earth and touch voltage warnings ....................................................................................... 41
10.4.1 Protective earth warning (PE) operation..................................................................................................41
10.4.2 Inhibit protective earth confirmation (PE warning) .................................................................................. 42
10.5 Touch voltage (fault voltage) .................................................................................................................42
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11. Voltage measurement...................................................................................................................43
11.1 General.....................................................................................................................................................43
11.2 Hot keys for voltage measurements.......................................................................................................44
11.3 Display for voltage measurements.........................................................................................................44
11.4 All voltage measurements ...................................................................................................................... 44
11.5 Single-phase measurements ...................................................................................................................45
11.6 Three-phase measurements....................................................................................................................46
11.7 Phase sequence........................................................................................................................................46
11.8 Millivolt measurements...........................................................................................................................47
11.9 Frequency measurement.........................................................................................................................47
11.10 Sending results to a Bluetooth®device................................................................................................ 47
12. Current measurement ...................................................................................................................48
12.1 General.....................................................................................................................................................48
12.2 Hot keys for current measurements.......................................................................................................48
12.3 All current measurements.......................................................................................................................49
12.4 Current measurements............................................................................................................................49
13. Residual current device (RCD) testing..........................................................................................50
13.1 General.....................................................................................................................................................50
13.1.1 Types of RCD supported ........................................................................................................................50
13.1.2 RCD test current.....................................................................................................................................50
13.1.3 About the RCD tests ..............................................................................................................................51
13.1.4 The ½ x I test ......................................................................................................................................... 51
13.1.5 The 1 x I test .......................................................................................................................................... 51
13.1.6 The 2 x I test .......................................................................................................................................... 51
13.1.7 The 5 x I test .......................................................................................................................................... 52
13.1.8 The ramp test.........................................................................................................................................52
13.1.9 Testing at 0º and 180º............................................................................................................................ 52
13.1.10 RCD testing inhibit ...............................................................................................................................52
13.2 Hot keys for RCD tests.............................................................................................................................53
13.3 Display layout for RCD tests (AUTO TEST example shown) .................................................................. 53
13.4 Touch voltage – All RCD, RDC and touch voltage tests......................................................................... 53
13.5 Automatic RCD testing............................................................................................................................54
13.5.1 Customising the AUTO test sequence.....................................................................................................55
13.6 RCD testing at a single current...............................................................................................................55
13.7 Ramp testing RCDs .................................................................................................................................. 57
13.8 Touch-voltage test ................................................................................................................................... 58
13.9 VAR (Variable RCD) ................................................................................................................................. 59
13.9.1 Using the VAR option.............................................................................................................................59
13.9.2 Setting the VAR option........................................................................................................................... 60
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14. Earth Loop Impedance testing – TrueLoop™ ..............................................................................61
14.1 General.....................................................................................................................................................61
14.1.1 About Loop Impedance tests.................................................................................................................. 61
14.1.2 Using the Confidence Meter™...............................................................................................................62
14.2 Loop test options.....................................................................................................................................63
14.2.1 Hot key 1 – Types of loop test ................................................................................................................63
14.2.2 Hot key 2 – No RCD, RCD or EV RDC options......................................................................................... 63
14.2.3 Hot key 3 – No RCD, RCD or EV RDC options......................................................................................... 64
14.2.4 Hot key 4 – 2 wire, 2 wire HR and 3 wire methods ................................................................................. 64
14.2.5 Hot key 5 – test-lead connections...........................................................................................................64
14.2.6 Test inhibit ............................................................................................................................................. 65
14.3 Hot keys for Loop Impedance tests ........................................................................................................65
14.4 Test-lead null............................................................................................................................................ 65
14.5 Loop test recommendation table...........................................................................................................66
14.6 Measuring Loop Impedance – No RCD in circuit ................................................................................... 66
14.7 Measuring Loop Impedance (Zs) with RCD protection in circuit..........................................................68
14.8 Measuring EV charger Loop Impedance ................................................................................................69
14.9 Zmax – to find the highest Loop Impedance for a circuit..................................................................... 69
14.10 Zref – making and using the reference impedance for R1+R2 and Vdrop calculations ................... 71
14.11 R1 + R2 mode......................................................................................................................................... 73
14.12 Setting i-vdrop for volts drop measurements...................................................................................... 74
14.12.1 Volt drop..............................................................................................................................................74
14.12.2 Setting Zref ..........................................................................................................................................74
14.12.3 Setting i-vdrop .....................................................................................................................................75
14.12.4 Making a Volt drop measurement ........................................................................................................76
15. Instrument settings navigation....................................................................................................77
15.1 Settings screen navigation......................................................................................................................77
15.2 Hot keys in settings mode.......................................................................................................................77
15.3 Entering and leaving settings mode ......................................................................................................78
15.4 Selecting a settings page ........................................................................................................................ 78
15.5 General settings.......................................................................................................................................78
15.5.1 Screen brightness................................................................................................................................... 79
15.5.2 Backlight timer....................................................................................................................................... 79
15.5.3 Contrast mode....................................................................................................................................... 79
15.5.4 Setting the date ..................................................................................................................................... 79
15.5.5 Setting the time ..................................................................................................................................... 80
15.5.6 Key press beep....................................................................................................................................... 80
15.5.7 Results beep ..........................................................................................................................................80
15.5.8 Sleep timer.............................................................................................................................................81
15.5.9 Language............................................................................................................................................... 81
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15.5.10 PE confirmation....................................................................................................................................81
15.5.11 Network connection.............................................................................................................................82
15.5.12 Clear network connection ....................................................................................................................82
15.5.13 Reset to factory settings .......................................................................................................................82
15.6 Continuity test settings RLO..........................................................................................................................................................................................................83
15.6.1 Continuity buzzer threshold (limit alaram) .............................................................................................. 83
15.7 Insulation resistance settings..................................................................................................................83
15.7.1 Live voltage limit .................................................................................................................................... 83
15.7.2 Lock button available ............................................................................................................................. 84
15.7.3 Variable voltage .....................................................................................................................................84
15.7.4 Insulation buzzer threshold (limit alarm) ................................................................................................. 84
15.7.5 1000 V test ............................................................................................................................................84
15.8 Loop impedance settings ........................................................................................................................85
15.8.1 Allow reverse polarity............................................................................................................................. 85
15.8.2 Maximum touch voltage ........................................................................................................................85
15.8.3 AUTO test start ...................................................................................................................................... 85
15.9 RCD test settings......................................................................................................................................86
15.9.1 Allow reverse polarity............................................................................................................................. 86
15.9.2 Maximum touch voltage ........................................................................................................................86
15.9.3 AUTO start test ...................................................................................................................................... 86
15.9.4 Ramp test speed ....................................................................................................................................86
15.9.5 Maximum test time ½ x I........................................................................................................................87
15.9.6 Maximum test time 1 x I.........................................................................................................................87
15.9.7 Auto sequence customisation.................................................................................................................87
15.10 Instrument information ........................................................................................................................88
16. Download results to a remote device..........................................................................................89
16.1 Creating a CertSuite™ account .............................................................................................................. 89
16.2 Installing CertSuite™ on a mobile device..............................................................................................89
16.3 Switching on the MFT-X1 Bluetooth®mode..........................................................................................90
16.4 Connecting to the MFT-X1 from CertSuite™......................................................................................... 90
16.5 Failure to connect....................................................................................................................................91
16.6 Sleep mode and power cycling the MFT-X1........................................................................................... 91
16.7 Sending test results to CertSuite™......................................................................................................... 92
16.8 Re-sending test results to CertSuite™.................................................................................................... 92
16.9 Further CertSuite information and support...........................................................................................92
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17. Updating the operating system ...................................................................................................93
17.1 To update your instrument operating system: ......................................................................................93
17.1.1 Download the latest operating system onto microSD card ......................................................................93
17.1.2 Installing the latest operating system to your instrument ........................................................................94
17.1.3 System update – Error messages.............................................................................................................96
17.1.4 Error during the automatic update process: ............................................................................................ 96
18. Service and maintenance..............................................................................................................97
18.1 General maintenance..............................................................................................................................97
18.2 Cleaning ...................................................................................................................................................97
18.3 Batteries and battery replacement.........................................................................................................97
18.3.1 Battery and fuse assembly .....................................................................................................................98
18.3.2 Battery status .........................................................................................................................................99
18.3.3 Lithium-ion battery pack – removal and replacement.............................................................................. 100
18.3.4 Lithium-ion battery pack – charging ....................................................................................................... 101
18.4 Battery disposal .......................................................................................................................................101
18.5 Fuse and fuse replacement .....................................................................................................................102
19. Specifications.................................................................................................................................103
20. Accessories and equipment..........................................................................................................107
20.1 Included accessories.................................................................................................................................107
20.2 Optional accessories ................................................................................................................................107
21. Calibration, Repair and Warranty ................................................................................................108
21.1 Return procedure ....................................................................................................................................108
22. Decommissioning ..........................................................................................................................109
22.1 WEEE Directive ........................................................................................................................................ 109
22.2 Battery disposal .......................................................................................................................................109
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1. Introduction
This guide explains how to use multifunction installation testers in the Megger MFT-X1.
Please read the guide carefully before you start using your MFT-X1.
1.1 Product description
The MFT-X1 is a multifunction tester designed primarily for testing electrical installations to meet the requirements
of international regulations and standards. It has been designed with safety, versatility, ease of use and reliability in
mind and it has an entirely new user interface that simplifies and speeds up testing as well as greatly reducing the risk
of errors.
The MFT-X1 also supports user upgradeable firmware, through the removable microSD card.
The main functions of the MFT-X1 are:
Voltage, frequency, and current measurement (using current clamp)
Continuity testing and resistance measurement
Insulation resistance testing
Loop impedance testing and short-circuit current evaluation
Volt drop measurement
Residual current device (RCD) testing
Touch voltage measurement
Earth resistance measurement (2 wire)
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Introduction