- Designed for low-voltage installation tests
- True Loop™ testing with Confidence Meter™
- Bluetooth® transfer to CertSuite Installation
- Configurable RCD and EV auto-sequence tests
Megger MFT-X1 Multifunction Tester
Developed for electricians commissioning, maintaining and diagnosing faults on low-voltage electrical installations, the Megger MFT-X1 Multifunction Tester supports single- and three-phase domestic, commercial and industrial systems, including EV charge points and domestic photovoltaic systems. Its functions cover AC, DC and TRMS voltage, automatic phase sequence, continuity and resistance, insulation resistance, True Loop™ loop impedance, volt drop, configurable RCD and 6 mA RDC testing, plus 2-wire, 3-wire, ART and stakeless earth testing with optional clamps where required.
True Loop™ testing combines 2-wire and 3-wire non-trip modes with the Confidence Meter™, which monitors measurement progress and removes erroneous values to provide a stable result in electrically noisy conditions. High-resolution mode reaches 0.001 Ω with 50 kA current calculation, while stabilised insulation output covers fixed voltages from 50 V DC to 1000 V DC plus a variable 50 V to 999 V range. Results can be tagged and transferred by Bluetooth® to CertSuite Installation, while the 480 x 272 TFT display, graphical connection guidance, quick-change Li-ion battery and user-installed microSD firmware updates support work on site.
Key Benefits
- Confidence Meter™ technology monitors loop-test progress and removes erroneous values caused by circuit noise
- Non-trip loop testing typically takes around seven seconds on quiet circuits
- High-resolution 0.001 Ω loop testing supports current calculations up to 50 kA
- Configurable RCD sequences let users select required tests and add ramp testing
- Bluetooth® result transfer connects test data with CertSuite Installation certificates and reports
- User-installed microSD updates allow the operating system to receive later functions, features and standards changes
- The 480 x 272 colour TFT display includes a monochrome mode for difficult lighting conditions
- Screen colours mirror the rotary selection dial, while context help provides graphical connection guidance
- The quick-change Li-ion battery provides more than 15 hours of use based on a typical daily test profile
- IP54 protection supports indoor and outdoor operation
Common Applications
The Megger MFT-X1 Multifunction Tester is suitable for a range of low-voltage electrical testing tasks, including:
- Single- and three-phase domestic, commercial and industrial installation testing
- EV charge point installation and maintenance testing
- Domestic photovoltaic system testing
- Motor and generator testing
- Machine testing
- Portable appliance safety testing
- Panel building and switchgear manufacturing
- Cable testing
General Specifications
| Specification | Details |
|---|---|
| Product type | Firmware-upgradeable multifunction tester for low-voltage electrical installations |
| Supported systems | Single- and three-phase domestic, commercial and industrial installations |
| Display | High-contrast 480 x 272 full-colour TFT bonded display with monochrome black-on-white mode |
| User interface | Colour-coded test selection rotary dial replicated on screen, hot keys for second-level functions and a second control dial |
| On-screen information | Confidence Meter™ progress bar, RCD ramp-test progress, insulation and continuity bar graph, plus L-N, L-E and N-E voltage widget |
| Graphical assistance | Context help provides graphical circuit-connection guidance for each measurement |
| Results transfer | Low-energy Bluetooth® transfer of circuit-tagged results to Android or IOS devices running CertSuite Installation, with cloud synchronisation |
| Operating system updates | User upgradeable using an operating-system file loaded onto a microSD card |
| Loop test technology | True Loop™ 2-wire and 3-wire non-trip testing with patented Confidence Meter™ technology |
| Loop test modes | 2-wire non-trip, high-current and high-resolution modes, plus 3-wire RCD and RDC EV non-trip modes |
| Volt-drop calculation | Requires Zref (Ze) and circuit current (I-vdrop); accuracy depends on loop-impedance accuracy |
| RCD types | Type AC, A, B, AC(S), A(S) and B(S) |
| RCD test sequence | Customer-configurable 1/2 x IΔn, 1 x IΔn, 2 x IΔn, 5 x IΔn, ramp, 0° and 180° sequence |
| Earth test methods | 2-wire, 3-wire, 3-wire ART and stakeless earth-resistance testing |
| Phase sequence | Automatic phase-sequence testing on detection of valid three-phase supplies |
| Live-earth detection | Indicates a live PE terminal and inhibits the selected loop or RCD test |
| Test-lead null | Removes test-lead resistance from displayed continuity and low-resistance measurements; supports lead resistance up to 9.99 Ω |
| EV charge-point connection | Requires an optional Megger EV charge-point adaptor |
| Optional clamp connections | MCC1010 current clamp for AC current and 3-wire ART measurements; MCC1010 and MVC1010 clamps for stakeless earth testing |
| Safety rating | CAT III 600 V / CAT IV 300 V to EN 61010, IEC 61010-031:2015 and IEC 61010-030 with respect to earth; valid to 2000 m |
| Electrical protection | Active live-voltage protection to 600 V between test terminals, with audible and display warning above 5 V; fuse protected to 1000 V with non-user-changeable fuses |
| Power supply | 7.2 V DC 4400 mAh rechargeable Li-ion battery with charge-status indication |
| Battery life | More than 15 hours based on a typical daily test profile; approximately 2000 continuity, 1400 insulation or 1600 earth tests under stated test cycles |
| Battery charging time | 2.5 to 3 hours, dependent on ambient temperature |
Measurement and Accuracy Specifications
| Measurement Function | Range and Resolution | Accuracy |
|---|---|---|
| DC voltage | 0 V to ±1000 V 1000 V DC applies to non-CAT-rated circuits |
±1% ±3 digits |
| AC/TRMS voltage | 0 V to 600 V 15 Hz to 500 Hz |
±2% ±1 digit |
| Frequency | 15 Hz to 99 Hz 100 Hz to 500 Hz |
15 Hz to 99 Hz: ±0.5% ±2 digits 100 Hz to 500 Hz: ±2.0% ±2 digits |
| Millivolt measurement | AC/TRMS: 0 mV to 1999 mV at 50/60 Hz DC: 0 mV to ±1999 mV |
AC/TRMS: ±1% ±3 digits DC: ±1% ±3 digits |
| AC/TRMS current | 0.001 A to 0.100 A 0.100 A to 2.000 A 2.00 A to 20.00 A 20.0 A to 300.0 A Frequency bandwidth: 15 Hz to 500 Hz Requires optional MCC1010 current clamp |
±2% ±3 digits for each range Influence of frequency, 30 Hz to 500 Hz: ≤0.25% |
| Continuity and resistance | 200 mA: 0.01 Ω to 99.9 Ω 10 mA: 0.01 Ω to 99.9 Ω High resistance: 100 Ω to 999 kΩ Open-circuit voltage: 4 V to 5 V EN 61557-4 range: 0.10 Ω to 999 kΩ |
200 mA: ±3% ±2 digits; 205 mA ±5 mA at 0 Ω to 2 Ω 10 mA: ±3% ±2 digits 100 Ω to 999 kΩ: ±5% ±2 digits |
| Fixed-voltage insulation resistance | 1000 V: 0.001 MΩ to 999 MΩ 500 V: 0.001 MΩ to 500 MΩ and >500 MΩ 250 V: 0.001 MΩ to 250 MΩ and >250 MΩ 100 V: 0.001 MΩ to 100 MΩ and >100 MΩ 50 V: 0.001 MΩ to 50 MΩ and >50 MΩ |
1000 V: ±3% ±2 digits 500 V: ±3% ±2 digits to 500 MΩ; ±10% above 500 MΩ 250 V: ±3% ±2 digits to 250 MΩ; ±10% above 250 MΩ 100 V: ±3% ±2 digits to 100 MΩ; ±10% above 100 MΩ 50 V: ±3% ±2 digits to 50 MΩ; ±10% above 50 MΩ |
| Variable insulation and leakage current | Variable test voltage: 50 V to 999 V Leakage current: 0.1 µA to 1.99 mA Output voltage: -0% +2% +2 V at rated load or less Short-circuit current: 1.5 mA nominal Maximum capacitance: 2 µF for a stable reading, 5 µF absolute limit |
Leakage current >1 mA: ±3% ±2 digits Leakage current <1 mA: ±10% Leakage-current measurement: ±10% Voltage display: ±1% ±3 V |
| 2-wire high-resolution loop | 0.001 Ω to 9.999 Ω Resolution: 0.001 Ω Supply: 48 V to 550 V, 45 Hz to 65 Hz |
±2% ±0.030 Ω |
| 2-wire loop without RCD | 0.01 Ω to 9.99 Ω 10.0 Ω to 99.9 Ω 100 Ω to 1999 Ω Supply: 48 V to 550 V, 45 Hz to 65 Hz EN 61557-3 range: 0.30 Ω to 1999 Ω |
0.01 Ω to 9.99 Ω: ±2% ±5 digits 10.0 Ω to 99.9 Ω: ±10% ±5 digits 100 Ω to 1999 Ω: ±10% ±5 digits |
| 2-wire L-PE loop with RCD | 0.01 Ω to 1999 Ω Supply: 48 V to 280 V, 45 Hz to 65 Hz For RCDs rated ≥30 mA EN 61557-3 range: 1.00 Ω to 1999 Ω |
±10% ±5 digits |
| 3-wire L-PE loop with RCD | 0.01 Ω to 9.99 Ω Resolution: 0.01 Ω RCD test current: 15 mA RDC EV test current: 3 mA Supply: 48 V to 280 V, 45 Hz to 65 Hz EN 61557-3 range: 1.00 Ω to 1999 Ω |
0.01 Ω to 9.99 Ω: ±2% ±5 digits |
| Type AC and A RCD | Types AC, A, AC(S) and A(S) IΔn: 10 mA, 30 mA, 100 mA, 300 mA, 500 mA, 650 mA, 1000 mA and VAR Supply: 48 V to 280 V, 45 Hz to 65 Hz |
1/2 I no-trip current: -10% to +0% of 0.5 IΔn AC trip current: -0% to +10% of M • IΔn Pulsed DC trip current: -0% to +10% of 1.4 • M • IΔn Trip time: ±10% Ramp current: ±5% Fault voltage: +5% +15% ±0.5 V |
| Type B RCD | Types B and B(S) IΔn: 10 mA, 30 mA, 100 mA, 300 mA and 500 mA Supply: 48 V to 280 V, 45 Hz to 65 Hz |
1/2 I no-trip current: -10% to +0% of 0.5 IΔn Trip current: -0% to +10% of 2 IΔn Trip time: ±10% Ramp current: ±5% Fault voltage: +5% +15% ±0.5 V |
| 6 mA RDC EV | 2.0 mA increasing to 6.3 mA, then held for 10 seconds For a Type EV RDC with a 30 mA Type A RCD Supply: 48 V to 280 V, 45 Hz to 65 Hz |
Trip time: ±1% ±1 ms Ramp current: ±5% Fault voltage: +5% +15% ±0.5 V |
| 2-wire earth resistance | 0.01 Ω to 1999 Ω Test frequency: 128 Hz Test current: 4.5 mA EN 61557-5 range: 1 Ω to 1999 Ω |
±2% ±3 digits |
| 3-wire earth resistance | 0.01 Ω to 1999 Ω Test frequency: 128 Hz Test current: 25 V, 4.5 mA Maximum auxiliary-electrode resistance: 5 kΩ at 25 V |
±2% ±3 digits |
| 3-wire ART earth resistance | 0.01 Ω to 1999 Ω Test frequency: 128 Hz Test current: 25 V, 4.5 mA Maximum auxiliary-electrode resistance: 5 kΩ at 25 V or 100 kΩ at 50 V Requires optional MCC1010 current clamp |
±5% ±3 digits |
| Stakeless earth resistance | 1.0 Ω to 60 Ω Test frequency: 128 Hz EN 61557-5 range: 1.00 Ω to 40.0 Ω Requires optional MCC1010 and MVC1010 clamps |
±7% ±5 digits |
Mechanical and General Information
| Specification | Details |
|---|---|
| Operating temperature | -10 °C to +55 °C |
| Storage temperature | -25 °C to +70 °C |
| Operating humidity | 90% R.H. at +40 °C maximum |
| Ingress protection | IEC 60529 IP54, protected against dust and water splashes and suitable for indoor and outdoor use |
| Vibration | MIL-PRF-28800F Class 2 |
| Maximum operating altitude | 2000 m |
| Pollution degree | 2 |
| Dimensions | 274 mm long x 96 mm wide x 143 mm deep |
| Instrument weight | 1.57 kg |
Specification Notes
- Megger’s product advisory dated 20 December 2023 states that an aborted RCD or touch-voltage test may display an incorrect touch voltage; complete another RCD or touch-voltage test, or restart the instrument, before continuing
- A good connection is required when nulling leads; a poor null can introduce a high null value and artificially low resistance measurements
- The 2-wire earth-resistance result includes the resistance of the test leads
Meta Description
Megger MFT-X1 Multifunction Tester combines True Loop™ testing, configurable RCD tests and Bluetooth® transfer for low-voltage installations.
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