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Upgrade from the MFT1710 to the brand new 1711 and experience the following new features:
The ideal entry-level multifunction installation tester - the Megger MFT1710 is suitable for use with single phase and 3 phase electrical installations in both commercial domestic properties and is in compliance with IEC60364, VDE0100 and BS7671.
Built from the ground-up for ease-of-use, the MFT1710 is at home on the bench, around your neck on the included carrying strap or propped up on a ladder or platform. Dual testing buttons on each side of the unit give easy access to test activiation and colour-coded dials make test selections as simple and quick as possible.
With the MFT1710, you'll be able to test all basic electrical properties. Test functions include insulation testing at selectable test voltages of 250 and 500V, 200mA continuity test (with adjustable buzzer threshold), 2 and 3-wire non-trip loop testing (L-PE), 2-wire Hi current loop testing (L-N) and testing of PSCC and PFC (20kA) max. Dedicated RCD testing functions are also included, with 1/2, 1, 5 x I and ramp modes available for 30, 100, 300 and 500mA RCDs.
IEC 61010 CAT IV 300V rated, the MFT1710 is suitable for connection to low voltage systems with no protective device and constantly keeps the user safe with full input protection and safety warnings when hazardous voltages are detected. If voltage levels reach dangerous levels, testing is automatically stopped and inhibited to prevent accidents.
The 1710 even includes a super-bright backlit LCD screen for using the tester in darkened conditions.
This table outlines the difference between each model in the Megger MFT1700 series.
|Test Voltage Display||√||√||√|
|Adjustable Buzzer Threshold||√||√|
|Continuity & Resistance Ranges|
|Adjustable Buzzer Threshold||√||√||√|
|1/2, 1, 5 x I & Ramp RCD Test||√||√||√|
|Auto RCD Test||√||√|
|Type AC, A and S RCDs||√||√||√|
|Type B (Pure DC) RCDs||√|
|3-Phase RCD (No Earth)||√||√|
|30, 100, 300 and 500mA RCD||√||√||√|
|10mA and 1000mA RCD||√||√|
|2 and 3-Wire Non-Tripping
L-PE 50V - 280V
|2 Wire Hi Current L-N 50V - 280V||√||√||√|
|2 Wire Phase to Phase L-L
50V - 500V
|PSCC & PFC (20kA Max)||√||√||√|
|Max Zs Display||√||√|
|R1 + R2 Value||√||√|
|Touch Voltage Display on
|Earth Electrode Test|
|2 and 3 Pole||√|
|Leakage Current Measurement||√||√|
|Rechargeable Batteries with
|SP5 Switched Probe Included||√||√|
|Warranty Upgradeable to 3 Years||√||√||√|
|On-Board Memory with Bluetooth
|CAT IV 300V / CAT III 600V||√||√||√|
The entry level model 1710 from the new 1700 megger series
Being the entry level you would expect the 1710 to be without some very useful and popular functions, but still satisfy the requirements of BS 7671. Thankfully, this is is very much the case!
I first got my hands on the higher range models - 1720 & 1730 - before playing with the 1710 and that really worked in its favour as the additional features seemed - in my opinion - a bit too gimmicky.
Upon first observations of the 1710 one of the first things you will notice is the amount of bare space that is on display around the dials due to the lack of functions when compared to the higher models. Naturally this makes people attracted to the higher models as it appears that more is good, but if you observe the basics of the 1710 model and how it meets the requirements for the typical small commercial or domestic installations, this 1710 is more than capable for the task.
The leads provided with the 1710 are the same as provided with the higher range instruments - they are of good robust quality, don't tend to snag and easy to hold firmly when testing. The newer croc clips provided with these leads are larger than they used to be, which make them feel clumsy at first but the extra size give you more leverage and hence more control - it just takes a bit of getting used to if you are familiar with the older croc clips.
The plug/mains lead has been changed which now allows for more suitable continuity tests - avoiding the use of socket interface adapters - as well as the live tests. The 1710 does NOT include a remote probe, but the port for one exists and so you can add a remote probe to the equipment if you find it more suitable.
This is most definitely the biggest improvement with these new machines. Similar testers that I use such as the Kewtech KT65, and Fluke 1651B, have clear displays from the front but they are recessed into the instrument so far that you cannot read the instrument from an angle to the machine - so you are constantly positioning it to face you or having to have it wrapped around your neck. The new 1700 series have a large white backlit display with bolder numerals which allow the machine to be seen clearly in all locations and areas. Here is a comparison of the clarity of the display when compared to another well lit instrument - the Kewtech KT65.
Testing with the 1710
What follows is a little walk through how the 1710 is used to carry out testing and inspection of a domestic or small single phase installation.
Continuity testing - Nulling
The 1710 has 2 rotary dials. One for test selection, and a smaller second dial for settings and RCD test device rating selection. To carry out continuity tests the 1710 displays the omega symbol for easy identification of continuity setting. Once the tester is set and the leads are connected, then the leads will need to be nulled for accuracy of the low resistance ohmmeter tests. As with the prior megger series the 1700 series has the auto continuity testing feature and this can really save time and create a safer working method when testing.
Connecting the two leads together, you will obtain a value for the resistance of the test leads. Press the test button with the leads connected and their value will be nulled, and as long as the null symbol is displayed on the tester then the instrument is reading for low resistance testing.
If it is preferred, the tester can be set to give off an audible sound when continuity is made - similar to voltage indicators - this is found in the settings and can be set to different values. One of the changes from the 1500 series to the 1700 is the mains leads connection port. On older models they were fabricated in such a shape that only the designated mains lead can be used.
But now the megger has gone down the similar path to the fluke models - in that the mains leads just splits to 3 x 4mm jacks that connect into the single ports. The benefit of this being that as the instrument only has the 3 ports for connection, the mains lead can be utilised for continuity testing on socket outlets circuits. Naturally, the mains lead will need to be nulled also for this - but it does avoid additional costs for socket interface adapters etc.
Insulation resistance testing
The 1710 comes with the ability to carry out insulation resistance tests at 250v dc and at 500v dc - This satisfies the requirements of BS 7671 for testing circuits of SELV or PELV and for circuits up to a nominal voltage of 500v and so suits most installation types. The insulation resistance test can be locked on, by pressing the lock button whilst testing. This offers a useful hands free method of testing to allow for fault finding etc. However, locking an installation tester while it is pumping out 500v dc is a little dangerous and so the locking feature should only be used when the installation is fully at your control and there are no risk to other persons present. The 1700 series also now have additional protection with the introduction of live voltage protection to your instrument whilst carrying out an insulation test. If the instrument is connected to a system that is energised while it is set to insulation resistance, the tester gives an audible warning and switches to displaying the voltage that is present - this will help prevent tester fatalities to some degree.
Loop and Fault current tests
The new 1700 series now include the ability to do the low trip loop test with only 2 leads. This is really useful when testing numerous circuits at high and low test currents as you don't have to keep changing the lead configuration between the tests. The accuracy of the values measured with the different applied test currents tends to vary in accuracy with all testers. So I carried out a loop test on a commonly known and controlled circuit value and compared the readings.
From my previous experience with the low trip loop value inaccuracies I find these to be pleasantly surprising. The setting of the loop test is clear to understand and the auto testing aspect is very useful for those without 3 hands from time to time. When carrying out the loop test, the prospective fault current value is automatically displayed above the value because of the dual display - personally I think this encourages bad practice, but all the testers are doing this now.
One of the popular features that the 1710 is without is the AUTO RCD test setting. For some users of test equipment the AUTO RCD has become a nearly essential time saver and so the absence of this feature could persuade them towards the higher 1720 instrument. The 1710 does have the ramp test, which is becoming a favoured feature for RCD diagnostics. The 1710 carries out all the required tests for BS 7671 on 30, 100, 300 and 500 milliamp devices:
The higher models such as the 1720 and 1730 also carry out 10 and 1000mA rated device test as well as a Variable RCD test which will be more suitable for larger commercial installations.
So what's missing?
Well as stated before, you will have to do without the AUTO RCD setting on the 1710. If you are a domestic electrician or work in the small commercial sector that is pretty much all there is to miss.
If you work in the commercial sector occasionally and cannot decide you need to remember that the higher models - 1720 and 1730 - consists of additional features such as phase rotation, AUTO RCD, a broader RCD device range and more insulation resistance voltages - the 1730 also has electrode testing, rechargeable batteries and downloaded memory with bluetooth. Megger really have made a model for different users and different work environments with this new 1700 series and the 1710 carries all of the benefits of the new series and fewer of the non essentials - in my opinion it is the best value for money when considering what the extra money gets you with the others.
|Output Voltage||0 to 20% at rated load or less|
|Voltage Display||±3% ±3 digits
±0.5% of rated voltage
|Short Circuit Current||1.5mA nominal test current|
|Test Current On Load||1mA at min pass values of insulation|
|Insulation Test Voltage||Range||Accuracy|
|100V||10kΩ to 100MΩ
|±3% ±2 digits
±10% ±4 digits
|250V||10kΩ to 250MΩ
|±3% ±2 digits
±10% ±4 digits
|Resistance and Continuity|
|0.01 to 99.9Ω||±2% ±2 digits|
|100Ω to 99.9kΩ||±5% ± 2 digits|
|Open Circuit Voltage||5V ±1V|
|Test Current||0 to 2Ω - 205mA ±5mA
15mA ± 5mA (user-selectable)
|Live To Earth/Neutral Supply||48V to 280V (45 to 65Hz)|
|L-N/L-L Tests||±5% ± 5 digits|
|0.1Ω to 39.9Ω||±5% ± 5 digits ± noise margin|
|40 to 1000Ω||±10% ±5 digits|
|Display Range||0.01Ω to 1000Ω|
|Live to Earth PFC Range||20kA|
|Supply up to 100mA||48V to 480V (45 to 65Hz)|
|Supply up to 1A||48V to 280V|
|RCD Type||Tpye AC, A, S
Type B (Pure DC)
|No-Trip Test (1/2xl)||-10 to 0%|
|Trip Test (1xI, 2xI, 5xI)||0 to 10%|
|Touch Voltage (0 to 253V)||±5% ±15% ± 0.5V|
|Trip Time||±1% ±1ms|
|10mA to 50mA||1mA steps|
|50mA to 500mA||5mA steps|
|500mA to 1000mA||10mA steps|
|Voltage||10V to 600V (15 to 400Hz) true RMS|
|Power Supply||IEC LR6 type AA alkaline batteries|
600 V Cat III / 300 V Cat IV (Max Phase to Phase 600 V)
IEC 61557:2007 parts 1 to 10
|EMC||IEC61326 edition 2 location class B|
|Operating Temperature And Humidity||-10 °C ~ +55 °C
90% R.H. at +40 °C max
|Storage Temperature||-25 °C ~ +70 °C|
|Weight (Instrument + Case)||1kg (with batteries)|
|Dimensions (Instrument + Case)||150mm (H) x 85mm (W) x 235mm (D)|
|Temperature Coefficient||<0.1°C per °C|
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Review by Dave Williams (Posted on 12/01/2017)
5 years old and still going strong
Review by gpm (Posted on 23/06/2014)
delivered nice & prompt