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

1.2 Features
The MFT-X1 introduces many new features that help users to work more safely and more productively.
Some of the most important of these are:
No tools, quick release, safe battery design
Simple user interface with colour-coded display screens
User upgradeable operating system
TrueLoop™ circuit impedance testing
High resolution Loop Impedance to 0.001 Ω
Confidence Meter™
User configurable RCD auto-sequence
RCD testing for 10 mA to 1000 A devices
RCD testing for AC, DC sensitive and pure DC devices
RDC and type B testing for EV charge points
Full colour 480 x 272 TFT / Monochrome display configurations
Scratch proof hardened glass display
Fully bonded screen
Innovative integration of rotary knobs and graphical display
Time and date stamped measurement results (Li-ION coin cell)
Unique modular Lithium Ion battery solution
Multi-language interface
On-screen graphical help
Continuous voltage screen widget
IP54 for outdoor use
1.3 Company web site
Occasionally an information bulletin may be issued via the Megger web site. This may be new accessories, new usage
instructions or a software update. Please occasionally check on the Megger web site for anything applicable to your
Megger instruments.
www.megger.com
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Introduction

2. Safety Warnings
These safety warnings are indicative of safe practice and must be followed. Additionally, they do not replace local
safety procedures in the region where the instrument is used. These safety warnings must be read and understood
before the instrument is used. Retain for future reference. This instrument must be operated only by suitably trained
and competent people. Protection provided by the instrument, test leads or probes may be impaired if they are not
used in a manner specified by the manufacturer.
2.1 Warnings, Cautions and Notes
This user guide follows the internationally recognized definition of warnings, cautions and notes. These instructions
must always be adhered to.
Description
DANGER :DANGER : Indicates a dangerous situation which, if ignored, could lead to death, serious
injury or health problems.
WARNING : Indicates a potentially dangerous situation which, if ignored, could lead to death,
serious injury or health problems.
ATTENTION : Indicates a dangerous situation which, if ignored, could lead to injuries or health
problems.
CAUTION : Indicates a situation which could lead to damage of the equipment or environment
NOTE : Indicates important instructions to be followed to perform the relevant process safely and
efficiently.
2.2 Safety warnings
These safety warnings must be read and understood before the instrument is used. Retain for future reference.
WARNING : This instrument must be operated only by suitably trained and competent people.
Protection provided by the instrument may be impaired if it is not used in a manner specified by the
manufacturer.
Local Health and Safety Legislation requires users of this equipment and their employers to carry out valid risk
assessments of all electrical work to identify potential sources of danger and risk of electrical injury such as
inadvertent short circuits. Where the assessments show that the risk is significant then the use of fused test leads
may be appropriate.
Replacement fuses must be of the correct type and rating. Failure to fit the correctly rated fuse will result in fire
hazards and damage the instrument in the event of an overload.
Do not operate the instrument or connect it to any external system if it shows visible signs of damage or if it has
been stored for prolonged time in an environment outside its specification.
This product is not intrinsically safe. Do not use in an explosive atmosphere.
The circuit under test must be switched off, de-energized, securely isolated, and proved dead before test
connections are made when carrying out insulation and continuity tests.
Continuity of protective conductors and earthed equipotential bonding of new or modified installations must be
verified before carrying out an earth fault Loop Impedance or RCD test.
After an insulation test, the instrument must be left connected until the circuit has been discharged to a safe
voltage.
The instrument will not discharge the circuit after an insulation test if the test has been locked on.
In this case, the circuit must be discharged by other means.
Do not touch circuit connections and exposed metalwork of an installation or equipment under test.
Under fault conditions the system earth could become hazardous live.
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Safety Warnings

Do not touch the earth stakes, test leads, or their terminations (including connections to the earthing system
under test) if an installation earth fault can arise, unless adequate precautions are taken.
The Voltmeter function will operate only if the instrument is switched on and working correctly.
Before and after use always test a known voltage to check for correct instrument operation. Do not use the
instrument if incorrect results are obtained.
The ‘live circuit warning’ and ‘automatic discharge’ features must be regarded as additional safety features and
not a substitute for normal safe working practice which MUST be followed.
Only Megger approved test leads must be used with this product.
All test leads, probes and crocodile clips must be in good order, clean, and with no broken or cracked insulation.
Verify the integrity of the test leads before use. In particular, the insulation on the red fine-point probe must
be intact to reduce the risk of short-circuit and arc-flash explosion. If more than 4 mm of metal is exposed, the
probe must be disposed of and not used.
The mains test lead provided with the instrument must be used only by suitably trained and competent persons.
Never connect test probes, pins or other objects to the three lead plugs because of the danger of electrocution
and arc explosion.
Replacement fuses of fused test leads must be of the correct type and rating as marked on the leadset.
Disconnect the fused leadset from the instrument and the circuit under test before changing the fuse.
Ensure that hands remain behind guards of probes/clips when testing.
Always disconnect test leads from instrument and power down the instrument before disconnecting
the battery module.
The battery module must be replaced in a clean and dry environment.
Do not heat or dispose of the battery in a fire. Do not subject the battery to strong impact, mechanical shock or
excessive heat.
Do not short-circuit or reverse the polarity of the battery module.
Ensure every cell in the AA battery module is of identical type, and inserted in the correct orientation.
Never mix rechargeable and non-rechargeable cells.
The instrument must be set to OFF before the instrument is prepared for shipping.
The fuse cover located under the battery module must be fitted correctly before connecting the battery module
or protection will be compromised.
There are no user serviceable parts inside the instrument. Other than opening the fuse cover for the purpose of
replacing the fuses and performing firmware upgrades, do not disassemble the instrument.
2.2.1 Earth test warnings
When measuring resistance of an earth electrode while the distribution system is energised, the following
additional warnings apply.
All persons involved must be trained and competent in isolation and safety procedures for the system to be
worked on. They must be clearly instructed not to touch the earth electrode, test stakes, test leads, or their
terminations as ‘Live’ earths may be encountered. It is recommended that they wear appropriate rubber gloves,
rubber soled shoes, and stand on a rubber mat.
The earth electrode under test must be isolated from the circuit it is protecting before testing commences.
If this is not possible, ART (Attached Rod Technique) may be used to measure electrode resistance.
The instrument terminals must be connected to the system under test through isolation switches that are rated
to handle the likely maximum fault voltages and currents that could be encountered at the installation.
The isolation switch must be open whilst any personal contact is made with the remote test stakes,
or the connecting leads, e.g. when changing their position.
The instrument terminals should be connected to the system under test through fuses that are rated to handle
the likely maximum fault voltages and currents that could be encountered at the installation.
Special precautions are necessary when working in wet conditions or in agricultural areas: observe the local
safety standards and take all necessary special precautions applicable to the particular location and do not touch
the test leads with bare hands.
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Safety Warnings

2.2.2 Li-ION battery module warnings
This instrument may be provided with a Lithium-Ion high energy battery module.
Do not pierce, damage, disassemble or modify the battery module. The battery module contains safety and
protection devices which, if tampered with, may cause the battery to generate heat, rupture or ignite.
If a battery is suspected to be faulty, replace it with a Megger approved battery module.
If an instrument is suspected to contain a faulty battery module, the module must be removed before the
instrument is shipped.
Do not ship a faulty battery module, either separately or connected to an instrument.
The battery module must be charged only with an MBC2100 Li-ION battery charger in a dry environment.
2.2.3 Li-ION battery care
Only use the charger supplied by Megger Instruments Limited.
Please fully charge the Li-ION battery before using it for the first time. The green LED on the battery indicates
normal charging. Disconnect the charger from the battery after the LED on the charger has changed to green
colour.
The red LED will illuminate if the cell temperature is outside of 0 °C to 40 °C charging range.
The red LED can also illuminate if the wrong charger has been used such that the charging current is
greater than 4 A.
2.3 Product safety category – measurement connection
The product safety category, in accordance with IEC 61010, determines which parts of an electrical installation an
instrument may be safely used on. The category ratings are explained below. When used with approved Megger test-
leads, MFT-X1 instrument has a CAT IV 300 V and CAT III 600 V rating, but with some accessories, this rating may be
reduced. The reductions will be explained in the sections dealing with these modes and accessories.
WARNING : When using a test instrument, the applicable product safety category is always that of the
lowest rated component in the measurement circuit.
2.3.1 Safety category voltage
The voltage that forms part of the category rating (CAT IV 300 V or CAT III 600 V) is the maximum line-to-earth
voltage to which the instrument can be connected on that type of circuit.
2.3.2 CAT IV
Instruments with a CAT IV safety rating can be connected to circuits between the origin of the low-voltage mains
power supply and the distribution panel, provide that there is at least one protective device between the origin of the
supply and the point of connection of the instrument. If there is no such protective device, a temporary protective
device should be fitted. Alternatively, subject to the outcome of a risk assessment, it may be permissible to use fused
test-leads. Instruments with a CAT IV safety rating can also be connected to circuits between the distribution panel
and the electrical outlets and to circuits between the electrical outlets and the user equipment.
2.3.3 CAT III
Equipment with a CAT III safety rating can be connected to circuits between the distribution and the electrical outlets,
and to equipment between the electrical outlets and the user’s equipment
2.3.4 CAT II
Equipment with a CAT II safety rating can be connected to circuits between the electrical outlets and the user’s
equipment. Measurement equipment may be safely connected to circuits at the marked rating or lower. The
connection rating is that of the lowest rated component in the measurement circuit.
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Safety Warnings

2.4 Safety, Hazard and Warning symbols on the instrument
This section details the various safety and hazard icons on the instruments outer case.
Icon Description
F
Warning: High Voltage, risk of electric shock
GCaution: Refer to user guide
cEquipment complies with current EU directives
Equipment complies with current UK conformity requirements
Equipment complies with Australian and New Zealand conformity requirements
Do not dispose of to landfill, sewage systems or by fire
tEquipment protected throughout by double insulation or reinforced insulation
fTerminal is fused
Do Not Open. No serviceable parts inside
Green LED indicates battery module is being charged
Refer to manual when red LED is lit
Lithium-Ion battery module connections
g
CAT IV
600 V Category III 600 V measurement connection rating
g
CAT III
300 V Category IV 300 V measurement connection rating
Follow local recycling guidelines for Lithium Ion batteries
>600 V Do not use in distribution systems with voltages higher than 600 V AC RMS
2.5 Warning icons
This section details the warning icons that can show on the display.
Icon Warning Description
FExternal Voltage Warning Hazardous voltage exists on measurement terminals
GInternal Error Warning An error has occurred requiring attention
2.5.1 Connection terminals
This section relates to the explanation of the Gsymbol on the top left of the terminal panel label:
Unmated terminals can be energized from within the instrument and from external connection of other terminals.
The current clamp must be the type indicated as “MCC1010” to ensure safe connection to the instrument.
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Safety Warnings

3. Getting started
This section describes the basic layout of the instrument, the navigation controls and the screen layout that is common
to all measurements. It is strongly recommended the user familiarizes themselves with the full user guide, as there is a
great deal of information on how the measurement works as well as how to get the most from your instrument.
3.1 Quick start (for those in a hurry)
To get going quickly here is a summary of controls and tests.
Ensure a battery has been fully charged.
Turn the instrument on by rotating the left rotary knob to the main test mode required. The display will also
show which function is being selected.
The Hot keys at the top of the display allow each test mode to be customized as required.
A Hot key with more than two options can be pressed several times to scroll through the options.
Alternatively, the right range knob can be used to scroll through options very quickly, displaying the options in
an arc similar to the left range knob. Press the required Hot key first then turn the right hand knob.
The INFO bar at the bottom shows the terminal connections recommended, as below:
Voltage Continuity Insulation Loop
impedance
RCD Earth
resistance
Current
clamp
✓ (1) ✓✓✓✓✓✓
✓ ✓ (2)
✓ ✓
✓
✓ (3)
Fig 1: Terminal selection table
NOTE :
1. Provides all three voltages on single or 3 phase systems simultaneously.
2. Connecting the neutral provides reverse polarity detection
3. Connection for MCC1010 in current mode
Depending on the test mode selected the test will either start automatically or require the TEST button to be
pressed as below:
Voltage: Starts automatically on selection
Continuity: Starts automatically on selection
Insulation: Starts when TEST button is held down
Releasing test button stops test
Earth resistance: Starts when TEST button is pressed and released
Stops automatically on completion of test
Loop Impedance: Starts when TEST button is pressed and released
Stops automatically on completion of test
RCD: Starts when TEST button is pressed and released
Stops automatically on completion of test
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Getting started

4. Instrument Controls
4.1 Instrument layout
The front panel of your MFT-X1 multifunction tester has four main areas:
23
1
4
Item Description Item Description
1 Hot keys 3 Secondary rotary selector knob
2 Primary rotary selector knob 4 Display
9
88
5
7
6
Item Description Item Description
5 Hanging strap/neck strap attachment 8 Toolless battery release clips
6 Test lead connection panel 9 Battery info and warnings
7 Li-ION battery module
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Instrument Controls

4.2 Instrument display
The MFT-X1 display is a 480 x 272 colour TFT screen, with a toughened and bonded glass screen.
The display is divided into three areas:
3
1
2
Item Description Item Description
1 Hot key bar – Shows key functions 3Information bar – shows secondary
data, time date, test mode, lead
connections and battery status
2 Main display area – shows all
measurement quantities and secondary
test information
The purpose of the main display area is to show the measurement results. The information shown in the main display
area and the way it is arranged depends on the test you are carrying out and is explained in the relevant sections for
each type of test.
The display uses colour coded background for different tests, as used by Megger Limited across instrument ranges
4.2.1 Colour coded backgrounds
So that you can see immediately which test you have selected, even from a distance, the background colour of the
main display area changes to match the test function colour code:
Dark grey – Voltage or Current
Orange – Continuity
Red – Insulation
Green – Loop impedance
Yellow – RCD testing
Brown – Earth testing
Blue – Result storage
Dark grey + cog – Setting
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MFT-X1
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Instrument Controls

4.2.2 High contrast mode
Alternatively the display can be set to a black-on-white high contrast mode for bright sunlit environments.
Refer to 15.5.3 Contrast mode on page 79.
4.3 Instrument controls
The MFT-X1 has two rotary selector knobs. These allow the user to select the main measurement functions and the
Hot key minor measurement functions:
Left rotary selector – Main measurement modes
Right rotary selector – Hot key selection options
When you turn either of the rotary knobs, the part of the main display area close to that knob shows the options
you can select and which of them you have currently selected. When you stop turning the knob, this option display
disappears after two seconds.
Turning the LEFT selector wheel Turning the RIGHT selector wheel*
(see note below)
Shows the options and the selected function for
the main test modes
Shows the options and selection of the current
active Hot key
Options never change unless instrument
operating system is upgraded
Options change depending on Hot key selected.
NOTE : The right selector wheel is only available where a Hot key has more than two options available,
such as Insulation test voltage. Buzzer ON or OFF will not call a selector wheel.
4.3.1 The left-hand rotary knob
The left-hand rotary knob is used to turn the instrument off and to select the main test functions. It is also used to
select the instrument set-up mode.
This knob calls the main function options in the display screen.
As the rotary knob is turned the selected function turns in the display.
The functions are colour coded to match the display colours.
4.3.2 The right-hand rotary knob
The right-hand rotary knob selects the secondary test options. For example, when you are measuring insulation
resistance, you can use this knob to select the test voltage, as shown below:
The options you can select with the right hand knob depend on the type of test you are carrying out and on which
Hot key you have pressed.
In the example above, Hot key 5 is active, allowing the range knob to show the available test voltages.
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Instrument Controls

The Hot keys only have two options. These will not have an associated rotary knob option.
The Hot key bar at the top of the screen shows the available Hot keys with an icon representing the type of function
they perform.
For example:
In continuity measurement mode the hot keys show the following:
Hot key 1 Hot key 2 Hot key 3 Hot key 4 Hot key 5
Fig 2: Example of Hot keys
These functions change according to the type of test you are performing. In this case, the insulation test has four
types of action:
Hot key Action
1 Multi-function Hot key – these have more than two options.
This type of Hot key will also allow the operator to use the right range knob to access the multiple
options more quickly
2 Help key – This can change to position two in Volts and Continuity.
It allows access to the help screen for the test mode being run
3 Active or not active – This can be locked or unlocked
4 On or OFF – these usually have a switch indicator in the Hot key
5 Fixed, the Hot key cannot be changed
4.3.3 Information bar
At the base of the screen is the information bar, as below:
1 32 4 5
Fig 3: Example of information bar
Item Description Item Description
1 Test mode selected 4 Time
2 Bluetooth® status
(OFF – Bluetooth®disabled):
(Flashing – Bluetooth®on but not connected)
(ON – Bluetooth®connected to mobile device)
5 Battery status
3 Required test-lead connections
NOTE : Test results are time stamped with the time and date. The time is displayed permanently in the
INFO bar. The format can be changed. Refer to 15.5.4 Setting the date on page 79.
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Instrument Controls