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Megger MFT-X1 - User Manual

Megger MFT-X1
110 pages
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User Guide
MFT-X1
Multifunction tester

Table of Contents

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Summary

Safety Warnings

General Safety Precautions

Covers essential safety practices for operating the instrument and handling electrical circuits.

Battery Module Safety

Highlights specific warnings and care instructions for Li-ION battery modules.

Product Safety Categories

Explains safety categories (CAT IV, CAT III, CAT II) and voltage ratings based on IEC 61010.

Instrument Controls

Operation

Dead Circuit Tests

Continuity and Resistance Measurement

Performing Continuity Tests

Step-by-step guide for conducting continuity tests and understanding results.

Insulation Testing

Overview and Test Start Timer

Explains the purpose of insulation resistance tests and the mandatory test start timer.

Insulation Test Inhibit Conditions

Details voltage limits that will inhibit insulation testing to prevent hazards.

Performing Insulation Resistance Tests

Step-by-step guide for conducting insulation tests, including test lock functionality.

Earth Resistance Measurement

Two-Pole Earth Resistance Testing

Details the two-pole measurement method and associated hot keys for earth resistance.

Live Circuit Tests

General Precautions and Warnings

Discusses general procedures, warnings, and risk assessment for live testing.

Protective Earth and Touch Voltage Safety

Details PE confirmation, warnings, and touch voltage checks during live testing.

Voltage Measurement

Single and Three-Phase Voltage Measurements

Explains how to perform single-phase and three-phase voltage measurements.

Current Measurement

RCD Testing

RCD Test Fundamentals

Introduces RCD testing, supported types, test currents, and general test principles.

Specific RCD Test Procedures

Details the ½xI, 1xI, 2xI, 5xI, ramp tests, and phase angle testing.

RCD Test Inhibit and Settings

Explains RCD testing inhibit conditions and customization options.

Earth Loop Impedance Testing (TrueLoop)

General Principles and Confidence Meter

Introduces Loop Impedance testing, its purpose, and the Confidence Meter.

Measuring Loop Impedance Without RCD

Explains loop test recommendations and how to measure impedance without RCD protection.

Measuring Impedance With RCD Protection

Details how to measure Loop Impedance (Zs) on circuits protected by RCDs.

Reference Impedance (Zref)

Explains how to make and use a reference impedance measurement for R1+R2 and Vdrop.

Performing Volt Drop Measurements

Step-by-step guide for making volt drop measurements using the MFT-X1.

Instrument Settings

Test-Specific Settings (Continuity & Insulation)

Details continuity buzzer thresholds and live voltage limits for insulation tests.

Test Mode Settings (Loop Impedance)

Configures loop impedance test parameters like polarity, touch voltage, and auto-start.

Test Mode Settings (RCD)

Configures RCD test parameters like ramp speed, test times, and sequence customization.

Remote Data Download

Summary

Safety Warnings

General Safety Precautions

Covers essential safety practices for operating the instrument and handling electrical circuits.

Battery Module Safety

Highlights specific warnings and care instructions for Li-ION battery modules.

Product Safety Categories

Explains safety categories (CAT IV, CAT III, CAT II) and voltage ratings based on IEC 61010.

Instrument Controls

Operation

Dead Circuit Tests

Continuity and Resistance Measurement

Performing Continuity Tests

Step-by-step guide for conducting continuity tests and understanding results.

Insulation Testing

Overview and Test Start Timer

Explains the purpose of insulation resistance tests and the mandatory test start timer.

Insulation Test Inhibit Conditions

Details voltage limits that will inhibit insulation testing to prevent hazards.

Performing Insulation Resistance Tests

Step-by-step guide for conducting insulation tests, including test lock functionality.

Earth Resistance Measurement

Two-Pole Earth Resistance Testing

Details the two-pole measurement method and associated hot keys for earth resistance.

Live Circuit Tests

General Precautions and Warnings

Discusses general procedures, warnings, and risk assessment for live testing.

Protective Earth and Touch Voltage Safety

Details PE confirmation, warnings, and touch voltage checks during live testing.

Voltage Measurement

Single and Three-Phase Voltage Measurements

Explains how to perform single-phase and three-phase voltage measurements.

Current Measurement

RCD Testing

RCD Test Fundamentals

Introduces RCD testing, supported types, test currents, and general test principles.

Specific RCD Test Procedures

Details the ½xI, 1xI, 2xI, 5xI, ramp tests, and phase angle testing.

RCD Test Inhibit and Settings

Explains RCD testing inhibit conditions and customization options.

Earth Loop Impedance Testing (TrueLoop)

General Principles and Confidence Meter

Introduces Loop Impedance testing, its purpose, and the Confidence Meter.

Measuring Loop Impedance Without RCD

Explains loop test recommendations and how to measure impedance without RCD protection.

Measuring Impedance With RCD Protection

Details how to measure Loop Impedance (Zs) on circuits protected by RCDs.

Reference Impedance (Zref)

Explains how to make and use a reference impedance measurement for R1+R2 and Vdrop.

Performing Volt Drop Measurements

Step-by-step guide for making volt drop measurements using the MFT-X1.

Instrument Settings

Test-Specific Settings (Continuity & Insulation)

Details continuity buzzer thresholds and live voltage limits for insulation tests.

Test Mode Settings (Loop Impedance)

Configures loop impedance test parameters like polarity, touch voltage, and auto-start.

Test Mode Settings (RCD)

Configures RCD test parameters like ramp speed, test times, and sequence customization.

Remote Data Download

Megger MFT-X1 Specifications

General IconGeneral
Power SupplyRechargeable Li-ion battery
Phase Sequence IndicationYes
Resistance Range0.01 Ω to 100 kΩ
Protection RatingIP54
Continuity Testing0.01 Ω to 2000 Ω
Loop Testing0.01 Ω to 2000 Ω
RCD TestingType AC, A, F, B, and B+
Frequency Measurement15 Hz to 400 Hz
Insulation Test Voltage50 V, 100 V, 250 V, 500 V, 1000 V
Voltage Range12 V to 440 V AC/DC
Frequency Range15 Hz to 400 Hz
Battery LifeApproximately 8 hours

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