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Megger MFT1731 On-Site
  • Megger MFT1731 On-Site
  • Megger MFT1731 On-Site
  • Megger MFT1731 On-Site

Megger MFT1731 On-Site

Megger approved distributor and service centre.

Using the MFT1731 On-Site package means that you can perform all of the tests required by the regulations and complete test certificates electronically.

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Shipped as standard in a large soft carrying case, the Megger MFT1731 builds on the capabilities of the MFT1721 by adding support for three-pole ART earth resistance measurements, with a clamp option, and stakeless twin-clamp earth resistance measurements. This model also has internal storage for test results with wireless downloading to smartphones, tablets and other Bluetooth-equipped devices.

Using the MFT1731 On-Site package means that you can perform all of the tests required by the regulations and complete test certificates electronically. Certificates can be created and completed on a laptop or PC. PowerSuite® works on a wide range of platforms including all Windows operating systems up to and including Windows 7.

Once completed it is a simple step to issuing the certificate and invoice for the work to improve efficiency, raise productivity, speed up cash flow and eliminate errors that result from the transfer of handwritten results into the final test certificate.

All of the multifunction installation testers in Megger’s new range incorporate the qualities that have made the previous MFT1700-series instruments so popular and successful. These include a straightforward user interface for fast easy operation, robust construction to withstand the knocks and tumbles of everyday use, comprehensive electrical protection, and an extensive range of safety features, including a CAT IV 300 V/CAT III 600 V safety rating in line with IEC 61010.


three – phase installation tester.
2 and 3-wire non-trip loop impedance testing.
Fast 2-wire high current loop test including phase to phase testing ability.
ZMAX facility.
Full range of RCD tests from 10 mA to 1000 mA.
Selective, variable type B and 3-phase RCD (no neutral) testing.
Auto RCD and ramp.
Insulation testing at 1 kV, 500 V, 250 V and 100 V.
Continuity and low Ωs at 200 and 15 mA.
Adjustable buzzer threshold.
True RMS voltage measurement and phase rotation.
Stake-less, ART and 3-wire earth electrode testing.
Includes earth electrode testing lead set.
Supplied in a large soft carry case.

The MFT1731 On-Site can be used in a variety of ways:

Directly from the tester.
Results can be stored on the tester for later download to a PC.
Multiple users can complete parts of a larger installation at the same time and test results combined into a single complete certificate at the end of testing.
Multiple users can complete the same certificate at different times using different testers.
Completing a test certificate could not be easier. Simply take a measurement with the MFT1731, then either store the result for download later to a PC, or output the result directly, there on-site, using Bluetooth technology. Following full testing on a system, all results held on the tester can be downloaded into PowerSuite® and a certificate generated.

Using the MFT1731 On-Site package means that you can perform all of the tests required by the regulations and complete test certificates electronically.

Megger MFT1731 Specifications
Insulation Tests
Output Voltage -0 to +20% at rated load or less.
Voltage Display ±3% ±3 digits ±0.5% of rated voltage.
Short Circuit Current 1.5 mA nominal test current.
Test Current on Load 1 mA at min pass values of insulation.
Insulation Accuracy
1000 V 10 kΩ to 999 MΩ (±3% ± 2 digits).
500 V 10 kΩ to 500 MΩ (±3% ± 2 digits).
>500 MΩ (±10% ± 4 digits).
250 V 10 kΩ to 250 Ω (±3% ± 2 digits).
>250 MΩ (±10% ± 4 digits).
100 V 10 kΩ to 100 MΩ (±3% ± 2 digits).
>100 MΩ (±10% ± 4 digits).
Resistance and Continuity
Range and Accuracy 0.01 to 99.9 Ω (±2% ± 2 digits).
100 to 99.9 kΩ (±5% ± 2 digits).
Open Circuit Voltage 5 V ± 1 V.
Test Current (0 to 2 Ω) 205 mA ±5 mA.
15 mA ±5 mA (user selectable).
Loop Test
Live to Earth/Neutral Supply 48 to 280 V (45 to 65 Hz).
L-N/L-L Tests ±5% ±5 digits.
L-E Tests 0.1 to 39.9 Ω (±5% ±5 digits ± noise margin).
40 Ω to 1000 Ω (±10% ± 5 digits).
Display Range 0.01 to 1000 Ω.
Live to Earth PFC Range 20 kA.
Live to Live PSCC Range 20 kA.
RCD Tests
Supply up to 100 mA 48 to 480 V (45 to 65 Hz).
Supply up to 1 A 48V to 280 V.
RCD Type Type AC, A and S.
Type B (Pure DC).
No-Trip Test (1/2xI) -10 to -0%.
Trip Test (1xI, 2xI and 5xI) +0 to +10%.
Ramp Test Touch Voltage (0 to 253 V) ±5% +15% ±0.5 V.
Trip Time ±1% ±1 ms.
Trip Current ±5%.
Step Increments
VAR (Variable RCD Selection)
10 mA to 50 mA 1 mA steps.
50 mA to 500 mA 5 mA steps.
500 mA to 1000 mA 10 mA steps.
Supply Measurement
Voltage 10 V to 600 V (15 to 400 Hz) True RMS.
Voltage Accuracy ±3% ±1 V ±2 digits.
Phase Rotation Indication L1-L2-L3 and L1-L3-L2.
Frequency 15 Hz to 99 Hz (±0.5% ±1 digit).
Frequency Resolution 0.1 Hz.
Power Supply
Batteries 1.2V NiMH Rechargeable Batteries
Mains charger for on-board recharging (4 hours typical)
12V optional car charger available.
Earth/Ground Test
Resolution 0.01 Ω.
Current 0.45 mA or 4.5 mA.
Noise Rejection 20 V pk/pk (7V rms).
Max Probe Resistance (Rp and RC) 100 kΩ @ 50 V.
5 kΩ at 25 V.
2 and 3 Pole Method 0.01 to 1.999 kΩ (±2.0% ± 3 digits).
ART method (1.00Ω to 1.999 kΩ) with accuracy of ±5.0% ± 3 digits.
Stakeless Method 1.00 to 199 Ω (±7.0% ± 3 digits).
Current (Via Optional Clamp Meter)
Range 0.1 mA to 200 A AC (5.0% ± 3 digits).
Resolution 0.1 mA.
Conformity EC 61010-1: 2010
IEC 61010-30: 2010
IEC 61010-031: 2008
600V CAT III / CAT IV 300V (Max phase to phase 600V)
IEC 61557: 2007 parts 1 to 10.
EMC IEC61326 edition 2 location class B.
Operating Temperature Range and Humidity -10 to +55°C (90% RH at +40°C max).
Storage Temperature Range and Humidity -25 to +70°C.
Maximum Altitude 2000m.
Weight (Instrument and Case) 1 kg (with batteries).
Dimensions (Instrument and Case) 150 x 85 x 235 mm (H x W x D).
IP Rating IP54.
Calibration Temperature +20°C.
Temperature Coefficient <0.1% per °C.
Megger MFT1731 On-site warranty 1 year extendable to 3 years.


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Megger MFT1731 On-Site
Software PowerSuite Lite. 1000-631
Lead set
Fused 10 A test lead set (red/blue/green) with
prods and clips.
ETL30 Extension Test Lead 30 m. 1000-215
ETL50 Extension Test Lead 50 m. 1000-217
SP5 Switched Probe (silicone). 1001-687
ICLAMP Current measuring clamp. 1001-012
VCLAMP Voltage inducing clamp, calibration check pcb
(for stakeless test) and lead.
Pouch Test and carry pouch. 1006-408
Soft pouch Large soft pouch with extra storage. 1007-463
Strap Neck strap - Megger embroidered. 2001-509

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