Megger MFT1721 Multifunction Tester

SKU: MEGGMFT1721

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Key Features
  • Suitable for both single and three-phase installation testing
  • Patented 2 wire anti-trip loop test and insulation resistance testing
  • Tests 3 phase and Type B RCDs with an IP54 rating for ingress protection

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Megger MFT1721 Multifunction Tester

The Megger MFT1721 Multifunction Tester is suitable for maintaining and certifying single and three phase electrical installations in order to ensure compliance with Part P of the building regulations and the IET 17th edition wiring regulations (BS7671).

Capable of conducting line to line loop tests, confirming phase sequences and testing 3 phase RCDs, the Megger MFT1721 multifunction tester is ideal for certifying three phase electrical installations. Moreover, the MFT 1721 is one of a handful of installation testers capable of testing specialist type B RCDs commonly found protecting temporary generator supplies and other DC installations.

The MFT1721 can store a ‘Z-ref’ value (Ze measurement), calculating and displaying an R1+R2 reading after conducting a Zs test. Although, this feature should be reserved for confirming that a previously recorded R1+R2 continuity value is indeed correct, having energising the circuit for live testing.

Two rotary dials provide a user-friendly means of operating the instrument, with primary and secondary test settings being colour coded, reducing the chance of selecting an incorrect function or range. Test results are displayed on a large, dual format, crystal clear display that can be viewed from even the most acute of angles.

Designed for ease of use in the harshest environments, the instruments within the Megger MFT Multifunction Tester range are encased in hard-wearing rubber, improving grip and providing additional shock protection in the event of impact. All of the models in the range include a ‘test’ and ‘lock’ button on each side of the instrument for left and right-handed users alike, while also being IP54 rated providing ingress protection in poor conditions.

The Megger MFT1721 Multifunction Tester can be used to carry out the following tests:

  • Continuity: 15mA test for inductive loads and a 200mA test suitable for R1+R2 and R2 testing with adjustable buzzer threshold
  • Insulation resistance: 100V, 250V, 500V and 1000V tests with adjustable buzzer threshold
  • Loop: 2 and 3 wire test options featuring a patented anti-trip on both 2 and 3 wire test configurations. PSCC/PFC are tandem displayed with the loop test result. Also conducts line to line tests suitable for three phase installations
  • RCD: Ramp, manual (0.5x, 1x, 5x) or automatically test 10, 30, 100, 300, 500 and 1000mA AC, A, S, programmable, Type B and 3 phase RCDs
  • TRMS Voltage: accurately measure supply voltage and frequency and phase rotation

Megger MFT Comparison Table

  MFT1711 MFT1721 MFT-X0 MFT-X1
200mA Continuity Test ✔ ✔ ✔ ✔
Low Current Continuity Test - ✔ ✔ ✔
Insulation Resistance Test 250V, 500V & 1000V 100V, 250V, 500V & 1000V 100V, 250V, 500V & 1000V 50V, 100V, 250V, 500V & 1000V
Variable Insulation Resistance Test - -   User selectable 50V - 999V
RCD Test (AC, A & S Types) ✔ ✔ ✔ ✔
RCD Test (B Type DC Current) - ✔ ✔ ✔
RCD (3 phase) - ✔ ✔ ✔
6mA DC RCD Test (for EVSE) - - - ✔ (Direct EVSE connection requires EVCA210UK or EVX100)
Loop Test (2 & 3 Wire Anti-Trip) ✔ ✔ ✔ ✔
Line Test (L-L) - ✔ ✔ ✔
Loop Test R1+R2 Calculation - ✔ ✔ ✔
Loop Test Confidence Meter - - ✔ ✔
Loop Test Compensation for RCDs - - ✔ ✔
High Resolution Loop Test (0.001 resolution) - - - ✔
Phase Rotation - ✔ ✔ ✔
Leakage Current (1mA - 1000A) - ✔ (Requires MC1010 current clamp)   ✔ (Requires MC1010 current clamp)
Earth Test (2 & 3 pole) - - - ✔
Earth Test (ART) - - - ✔ (Requires MC1010 current clamp)
Earth Test (Stakeless) - - - ✔ (Requires MC1010 and MVC1010 clamps)
Test Certificate Generation - - ✔ (Requires Megger CertSuite software) ✔ (Requires Megger CertSuite software)
User Upgradeable Firmware - - ✔ ✔
Rechargeable - - Optional rechargeable battery ✔


Megger MFT1721 Multifunction Tester key features

  • Suitable for single and 3-phase installation testing
  • Patented 2 wire anti-trip loop test
  • Tests 3 phase and Type B RCDs

What's In The Box?

The Megger MFT1721 Multifunction Tester comes with the following accessories as standard.

  • Megger MFT1721 Multifunction Tester 1008-123
  • 3 wire test lead set with probes and crocodile clips
  • Mains plug test lead
  • Batteries
  • Switched test probe for remote testing
  • Megger embroidered Neck strap
  • Carry case
  • Megger calibration certificate
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Specification
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For full specifications, please find the data sheet in the 'Downloads' tab.

Label Type Size Download
pdf Megger MFT1711 & MFT1721 Datasheet pdf 314.4 KB Download

Please see our terms and conditions for full details of TM Care & Protect.

Everything you’re likely to require for the next 3 or 5 years:

✅ Annual calibrations included
No further calibration costs for either 3 or 5 years

✅ Free collection and return for annual calibration
No hidden postage costs when it’s time for calibration

✅ ‘Zero-Downtime’ for the life of your care plan
Free loan equipment should your purchase ever need sending away for repair

✅ Anti-theft protection 
Each care plan includes a SmartTrace Forensic Marking kit that acts as a deterrent for your test equipment and other tools

✅ Instrument cleaning kit
Cleaning kit included with each TM Care & Protect plan

Our hope is that TM Care & Protect will bolster our commitment to support you throughout your journey with us, providing you peace of mind from the hassles of annual servicing, potential tool theft and loss of earnings.

Ensures complete reliability, minimised downtime and peace of mind. TM Care & Protect packages include:

✅ Annual Calibration
No further calibration costs for up to 5 years.

✅ Zero Unplanned Downtime
In case of any unforeseen repairs, we provide FREE loan instruments so you can continue working.

✅ Theft Deterrent Kit
Each care plan includes a SmartTrace forensic marking kit: The UK's most powerful theft deterrent. Use on your test equipment, van and tools.

✅ No Shipping Cost
Includes collection and return deliveries when it's time for calibration.

✅ Instrument Cleaning Kit
Avoid preventable issues by keeping your test equipment clean.

Our hope is that TM Care & Protect will bolster our commitment to support you throughout your journey with us, providing you peace of mind from the hassles of annual servicing, potential tool theft and loss of earnings.

Please see our terms and conditions for full details of TM Care & Protect.

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