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Megger MFT1731 OS New Multifunction Tester with Software

FREE Gift The New and Improved, rechargeable, earth testing Megger MFT1731 Professional 18th Edition Multifunction Tester supplied with Software

Important Calibration Information

This instrument comes with a manufacturers calibration certificate.
Please see 'Calibration Options' in the description for more details.

Next Day Delivery (subject to availability)

£945.00 exc. VAT £1,134.00 inc. VAT £1,962.00 inc. VAT
  • Bluetooth Connectivity
  • Manufacturers Calibration Certificate
  • Phase Rotation Service
  • Includes Software
  • Rechargeable
  • Earth Testing
  • Downloadable
  • Auto RCD
  • Non Trip Loop Testing
  • FreeDelivery
  • 30DayMoneyBack
Required Fields
  • Description
  • Features & Specification
  • Resources
  • Delivery (updated)

 Free Gifts

This instrument comes complete with your choice of free gift from the drop-down menu above. Choose from a calibration voucher for next 
year or a 50m R2 wander lead. How about any one of the IET Guidance Notes, or a quality two-pole tester? 
Whatever you choose you can be sure you're getting a fantastic deal at Instrument Sales & Service.


Megger MFT1731: Rechargeable, Earth Testing, Professional 18th Edition Multifunction Tester complete with Software

The MFT1700 series is a range of 3 instruments for testing low voltage electrical installations to BS7671. They provide all the tests required to complete the necessary electrical certification for industrial, commercial and domestic fixed wiring installations.

*Important Calibration Information:

This instrument comes complete with the manufacturers dated calibration certificate. Please be aware that these certificates are generic and may also be time lapsed. If you would prefer a personalised full traceable calibration certificate applied to the equipment before dispatch, then please select this option from the drop-down menu above, an additional calibration charge will apply.


The Megger MFT1700 Series Comes Supplied With:

  • Printed quick start guide
  • Full user guide on CD
  • Manufacturer's Calibration Certificate
  • Switched Probe SP5 (not supplied with MFT1711)
  • Neck strap - Megger embroidered
  • 3 Wire lead set with prods and clips
  • Mains plug test lead (BS1363 (LT300-EN-BS)
  • AC battery charger (MFT1731 only)
  • Soft Carrying Pouch with Storage 

Key Features:

  • System voltage and frequency measurement TRMS

  • Insulation test at 100 V*, 250 V, 500 V and 1000 V Including input protection against live circuits up to 600 V even when insulation test is locked-on

  • Continuity resistance at 200 mA or 15 mA

  • Automatic start - no need to press TEST so leaving both hands free to hold probes

  • Resistance range up to 100 kΩ with fast continuity buzzer at selectable thresholds

  • Earth loop test

  • 2 and 3 wire non-trip range

  • 2 wire Hi current including phase to phase

  • Prospective fault current measurement up to 20 kA

  • RCD testing including:

  • Type AC, A, S, B* and programmable RCDs, 3-phase RCDs*, Auto-test routine, Fault (Touch) voltage display

  • Earth spike testing: 2-pole/3-pole, ART, Stakeless techniques


The new MFT1700 series has been designed for tough environments and ultimate reliability. Features include a rubber over mould for extra protection and grip, IP54 protection against dust and water and an EN61010 Cat IV safety rating. Its class leading input protection ensures the MFT can withstand accidental misuse and voltage transients when other testers can’t. All this in an intuitive and easy to use instrument with no hidden menus or complicated screens.


Tests are easily selected using the colour coded rotary switches with results clearly displayed on the high contrast, dual measurement, backlit display. Included with the instrument: standard 3-wire leadset and a mains test lead, a switched probe for fast and easy testing*, a full 12-month calibration certificate and warranty upgradeable to 3 years. The MFT1731 is supplied in a large soft pouch with plenty of additional space for optional extras like a few tools and the earth electrode test kit, comprising 2 spikes and 3 long test leads.


ISSWWW and Megger

The extensive Megger product portfolio provides electrical test equipment for an exceptionally wide range of applications at any point of the electricity network. From small handheld low voltage equipment such as multifunction installation testers through to high voltage asset test equipment like insulation resistance testers, circuit breaker analysers, protection relay test systems to transformer condition measurement devices.

Megger designs and manufactures portable electrical test equipment in factories located in Germany, Sweden, the UK, and USA. Megger products help you install, improve efficiency, reduce cost and extend the life of you or your customers’ electrical assets.

Established in the late 1800s, the company has been designing and making test and measurement instruments that perform electrical measurements for preventative maintenance, troubleshooting and commissioning for decades. Megger products have supported customers all over the world to improve their facilities’ efficiency, reduce costs, extend the life of apparatus and through trending and analysis, anticipate equipment failure and future performance.
Being a brand synonymous with the industry and a cornerstone pioneer of many of today’s everyday items of test equipment, ISSWWW are proud to bring you Megger’s full range of equipment and services, now and into the future.

Insulation Test

Output voltage

-0% +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 Volts

10 kΩ ~ 999 MΩ ±3% ±2 digits

500 Volts

~ 500 MΩ ±3% ±2 digits
>500 MΩ ±10% ±4 digits

250 Volts

10 kΩ ~ 250 MΩ ±3% ±2 digits

>250 MΩ ±10% ±4 digits

100 Volts

10 kΩ ~ 100 MΩ ±3% ±2 digits

>100 MΩ ±10% ±4 digits

Resistance and continuity

0.01 Ω ~ 99.9 Ω

±2% ±2 digits

100 Ω ~ 99.9 kΩ

±5% ±2 digits

Open circuit voltage

5 V ±1 V

Test current

(0 Ω ~ 2 Ω)

205 mA ±5 mA

15 mA ±5 mA

(user selectable)

Loop test

Live to earth/neutral supply

48 V ~ 280 V (45 Hz ~ 65 Hz)

Live to live supply (not MFT1711)

48 V ~ 500 V†† (45 Hz ~ 65 Hz)

L-N/L-L tests

±5% ±5 digits

L-E tests †

0.1 Ω ~ 39.9 Ω

±5% ±5 digits ± noise margin

40.0 Ω ~ 1000 Ω

±10% ±5 digits

Display range

0.01 Ω ~ 1000 Ω

Live to earth PFC range

20 kA

Live to live PSCC range

20 kA

RCD tests

Supply up to 100 mA

48 V ~ 480 V** (45 Hz ~ 65 Hz)

Supply up to 1 A

48 V ~ 280 V

RCD type

Type AC, A, S

Type B (pure dc)

No trip test


–10% ~ –0%

Trip test


(1xI, 2xI & 5xI)

+0% ~ +10%

Ramp test - Touch voltage

(0 ~ 253 V)

+5% +15% ±0.5 V

Trip time

±1% ±1 ms

Trip current


Step increments - VAR (variable RCD selection)

10 mA ~ 50 mA

1 mA steps

50 mA ~ 500 mA

5 mA steps

500 mA ~ 1000 mA

10 mA steps

Supply measurement


10 V ~ 600 V

(15 ~ 400 Hz) True RMS

±3% ± 1 V ±2 digits

Phase rotation indication

L1–L2–L3 & L1–L3–L2


15 Hz ~ 99 Hz ±0.5% ±1 digit

100 Hz ~ 400 Hz ±2.0% ±2 digits

Frequency resolution

0.1 Hz

Power supply

MFT1711 and MFT1721:

IEC LR6 type AA alkaline (6 cells - supplied)


1.2 V NiMH (rechargeable pack of 6 – supplied)


Mains charger for on-board re-charging (4 hours typical) 12 V car charger (cigar lighter lead - optional)

Earth / ground test


0.01 Ω


0.45 mA or 4.5 mA

Noise rejection

20 V pk/pk (7 V rms)

Max probe resistances Rp & Rc

100 kΩ @ 50 V

5 kΩ @ 25 V

2 & 3 pole method

(0.01 Ω ~ 1.999 kΩ)

±2.0% ±3 digits

ART method (1.00 Ω ~ 1.999 kΩ)

±5.0% ±3 digits**

Stakeless method (1.00 Ω ~ 199 Ω)

±7.0% ±3 digits**


(via optional clamp meter)

±5.0% ±3 digits


0.1 mA to 200 A ac


0.1 mA

MV sensor input

(MFT1721 and MFT1731)

Including temperature (third party module)

±1.0% ±2 digits



0.0 mV to ±199.9 mV dc


0.1 mV

Data storage - (MFT1731)


1000 results

Bluetooth communication


Weight (instrument and case)

1 kg (with batteries, excluding case)

IP Rating


Delivery Notices (Updated March 29th 2021)

During the current situation surrounding the effects of the Coronavirus pandemic, logistics from every company are under immense pressure to deliver goods on time.
Coupled with manufacturers on reduced output due to more stringent working practices and a global shortage of component parts to supply UK manufacturing, we have taken the decision to 
temporarily limit our services rather than let our customers down amid these unprecedented circumstances.
We hope you will understand our position on this and we apologize unreservedly for the inconvenience we know it will cause.

Please note that ALL orders placed before 3:00pm are shipped same-day (subject to stock and any additional services required).
The stated transport times above have some scope for adjustment built-in for the Covid-19 situation. Carriers themselves also have their own extended workload and limitations at this time which are unfortunately beyond our control.

Orders requiring calibration 

Whilst we take the greatest care to get all orders dispatched and delivered to you in the stated time frame, orders received PM and requiring
calibration may on occasion miss dispatch that day, according to the complexity of the calibration. Be assured they will ship on the next dispatch
this in most cases should not add more than 24 hours to your delivery.

Bank/Public Holidays

Predicted delivery times are based on regular trading days Monday to Friday. Public holidays, bank holidays and weekends are outside the usual scope
of our dispatch and subject to activities/holidays of our carriers and therefore may incur additional days lead time to your order.

*UK Mainland (Revised March 2021)

Service  Price 
Standard FREE 2-3 Day Courier Delivery – UK Mainland only - Zones A & B - Order value OVER £75.00 ex VAT - Order by 3:0pm FREE
Standard FREE 2-3 Day Courier Delivery – UK Mainland only - Zones A & B - Order value UNDER £75.00 ex VAT - Order by 3:0pm £4.75
Next WORKING Day (excludes Saturdays, Sundays and public holidays)  – UK Mainland only - Zones A & B  - ANY order value - Order by 3:0pm      £7.75
Saturday ANYTIME Delivery - Order by 3:0pm £9.95

New Postage Map Sept 2018>

Delivery Surcharges

Because of the high cost of carriage, we regretfully need to apply a surcharge on all deliveries made in the following regions:

  • Zones A & B  - Mainland delivery rates apply. 
  • Zone C - Scottish Highlands (Charges are calculated at the checkout).
  • Zone D - Outer Hebrides, Orkney Isles, Shetland Isles, Isle of Man, Scilly Isles, and Channel Islands (Charges are calculated at the checkout).
  • Zone E - Northern Ireland (Charges are calculated at the checkout).
  • Zone F - Republic of Ireland (Charges are calculated at the checkout).

Offshore Services

All offshore deliveries are a 3-4 day service as standard. This includes Channel Islands, Northern & Southern Ireland, Scottish Islands, Isle of Man and the Scilly Isles.

International delivery

International delivery charges are automatically added to your order at the checkout. For any questions regarding international deliveries please contact us at


All export inquiries should be directed to the export division before placement of order.

If no shipping option is available to your selected country please call us FREE on 0800 0224 060 to purchase your items.
All stated prices are subject to VAT at the current rate where applicable.