Megger MFT1741 Review and Demonstration
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- Опубліковано 4 вер 2019
- Detailed look at the Megger MFT1741 multifunction tester, with demonstrations of the main test functions.
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You explained this better than any tutor has and better than megger themselves..!!. Well done John great video..
As always brilliantly explained, you're a credit to the industry.
On variable RCD setting you can get to the higher RCD numbers quicker by going down the scale. After 10mA it goes to 1000mA,990mA,etc.
Also the voltage plug will give you L-E v if you press test. Press test again you’ll get N-E v, press again L-Nv.
Incredibly interesting and helpful John. Thanks.
Great explanation John. Thanks for sharing your indepth knowledge about this instrument.
Thank you for going though this meter - I have the same one and now I know what Z max does that's going to save me some time
Thanks for making these videos! Very informative and clear.
Hi, please make a video on Earth electrode testing would be very very helpful 👍 thanks
Great informative video, excellent guide.
Thanks John
Simply an awesome explanation...
Excellent review. Thanks John.
Loved this video thanks so much john it was a great help. You are a great teacher
Very useful as usual. Many thanks.
Brilliant - thanks for your time very usefull
Had one for a month now . Terrific piece of kit , well worth the upgrade from my old kewtech .
Which Kewtech did you have?
Alvin Ashman the basic model brought 8 years ago . Started to fail on certain tests so was time to upgrade .
Great explanation and competence. Thanks
You are the best, thank you. Been looking for this for a long time.
Just brilliant,thank you.
Exellent demo sir.thankyou.well done.
I think the reason for the round teeth of the wandering lead clip is to make better contact on piping when you measure bonding, but who knows if they thought that far ahead. Great video John. Hope you make some kind of money from all of this. It is of significant value. Cheers
Thanks John, got a 1721 not a kick in the arse off this one, thanks for explaining. Got it to do my 2391.
Thank you so much for this useful information about the Megger 1741
I follow your every video .
Thank you 🙏 Sir
I bought a Megger Current Clamp replacement lead (6220-807) and use it with my Fluke i400 AC Current Clamp for current measurements.
Good review John.
Thanks for sharing and best regards.
Thanks a lot best one so far,about megger
Brilliant job thank you .
Hello John as usual a fantastically informative over view of the Megger MFT1741 I would be very interested in a video of earth resistance testing especially with regards to some of the EV charge point installations
Great upload John, thank you.
Excellent video thank you .
Great video...very informative. Thank you.😀
Very thorough.
Shows up the Avo vii!
Great video 👍
I don’t use as much earth rod testing but for someone testing nearly 10 EICR a week 1721 it’s good it does R1R2 on calculating basis and it’s very very close to the actual test and in many many test it’s exactly the same
great teacher
A brilliant video and confirms my view that Megger make the best multifunction testers you can buy. . It seems that it's aimed at the professional inspector rather than a journeyman sparks.
No fluke best
@b gg comedian
Nice bit of kit!
@John Ward,
I'd love to see you do a review on a modern oscilloscope and how they are used.
Been using a 1741 for about a month now. It's alright but the 2low setting is shite compared to the 2low setting on the LTW425. Confidence meter and rcd uplift protection are nice but I think I preferred the fluke 1664
Great overview JW, and I must agree with your comment at the end, what a rubbish manual supplied, or available online from Megger. I bought one of these myself 4 months ago and complained to megger about the manual being non-model-specific. Their reply was almost on the lines of...' this is the manual, take it or leave it'....
When I bought a £300 washing machine it came with a full printed manual that described everything. why then when buying a bespoke piece of electrical testing equipment costing just under £1k, does it not come with a full manual for that specific model, just unbelievable !
Your video should be sent out with every machine as it gives the user the information they need, rather than having to rummage through pages and pages of irrelevant information that relate to a machine that you haven't bought!
As a market leader in test equipment, Megger should put more into the customer manuals. It's not that hard, surely.
I'm new to the testing game, so I don't have years of experience, I just want to know how to use all the facilities that the machine I bought provides.
Would be interested in seeing your thoughts on earthing for large scale generators (60kva) as this is my line of work. I have many colleagues who have differing opinions on when and how to earth generators for temporary events (BS7909). Particularly the situation where you have a generator sited on a road, providing power to market stalls and food stalls, so no soil available to put an earth stake into!
I have learned so much from your content, so thanks very much indeed.
Thanks John Great Vid.. unit Still a bit expensive..
John I'd be very interested to see an earth rod test as it's likely to be necessary more often now with EV charging installations
You don’t need an earth rod if they have the neutral monitor built in which I think most do now.
@@dayledonne8272 Tip mate, never ever ever ever buy the megger x1, it's a pile of shit compared to the 1741, ask me how i know... NO THE EARTH ISN'T LIVE...
Literally considering going back to the 1741
despite a 500quid fault
John. I would like to see a video on earth electrode testing
The two test and lock buttons are so it is easy to use by either left or right hand. On some other meters, you need to press both when using insulation testing, not on this one. Which is ok.
Would like to see a video on earth electrodes testing please. 👍
Jw your the best, I have learnt more from your videos than I did at college back in the late 80s, well done and thank you.
This is just my own opinion but I believe that the new line of MFts like fluke kewtech and the like are to bulky and over priced, I have used ROBIN MFT since I left college in 1992
They are great and they are complyant with BS7671 as the regs states that any test instrument that can perform the tests will be complyant, so how about doing a video on the Robin metres please,
please do make the earth electrode testing
Hi John, which multifunction tester is the best considering testing ev chargers, solar pv, earth electrodes and RCBOs. One for all.
It's about time Megger changed it's display for the RCD autotest results. Kewtech display all results on the display screen. It's a pain in the arse having to scroll round them on every test when coming back to the tester from the board. Been recently doing MEM and you can't do the RCBOs directly from the board.
Is the prospective fault current calculated on the measured voltage ?
I typically want to measure 110v and 414v circuits.
Please do an earth test too ? Good work and keep it up?
This has been very helpful. It’s ridiculous that Megger don’t have professional videos to clearly demonstrate field use of their instruments especially the MFT series. Anything I’ve see from them so far has been rubbish and as you say out of date.
Great content . You are an excellent tutor.
Where can I get replacement motherboard for megga insulation resistance tester? I had some batteries leaked and corroded the motherboard.
Is it possible to buy a used one?
Hi John.Which RCD mode do I select for a standard RCD, 30mA in Ireland.We classify our breakers, mcbs as b type. Is Megger classifying this as AC I wonder?
You have to choose the what the symbol shows (AC, A, F, B, B+). The type B is just for MCB's fast tripping. Watch this: ua-cam.com/video/5WNAHhQEn9U/v-deo.html
Having zeroed the meter on the long test lead 41:43 if you then use the short test lead, does the meter read negative resistance values ?
The Megger MFT doesn't display a minus(-) reading, the screen will flash zero(0.00) if the reading is below scale.
Great video, can you tell me how the loop test you demonstrated relates to the ROBIN KTS 1620 MFT OR COULD YOU PLEASE DO A VIDEO ON HOW TO USE THE ROBIN KTS 1620 / kewtech kt62 many thanks
I bought a second hand ROBIN 1620 recently. Did you find any video ?
Hi John, Did you ever manage to make a video demonstrating the 2 and 3 wire earth tests? It would be interesting to see it setup in a field or similar. Great video, enjoyed it! Cheers.
Yes, has already been recorded, just needs to be edited.
@@jwflame Excellent, look forward to seeing it. Thanks!
Zs measuring - when selecting 3Lo the Rcd symbols appear but on 2Lo they do not. What does this infer regarding tripping (or not) the RCD?
normally rcd trip on 2 lead test if the lo mode not applied. I use 3 lead test on high for a more accurate test
Hi John, I was interested in waiting for you to review this as I have the Megger 1730. Thanks for the video review of it. Do I recall that you used to use the Fluke MFT? Have you now switched to the Megger? Do you want to do a comparison of the two? I know there are hardened supporters of each . A built like the Dewalt V Makita gangs!! I would also be interested in you doing a video on earth electrode testing using the Megger at some point. Thanks again. Adrian
If you can do a video on consumer unit, how to install it bit by bit all the fuses etc, it would be great. your vidoes are much more clearer.
How do test psc between phases with the Megger MFT1741
They're are releasing a 1741 plus in the coming weeks, with a 6mA RCD test function. Currently Metrel is the only brand that can do a 6mA RCD test.
@@mikeZL3XD7029 to test installations involving EV, P.V ,any other installation that has requires pulsating DC current protection and proctected by a Type A - Type F RCD. Appropriate equipment is required to carry out a test, that ensures disconnection of the supply in case of a DC fault above 6mA.
John Covered RCD requirements in this video. ua-cam.com/video/HjEdR2PtK8Q/v-deo.html
It's out now, not much of a price increase to the 1741.
What's the difference between mft1741+ and mft1825? I want to buy one, Thanks
Can you do a similar review of a Fluke MFT please, I have a fluke 1664fc and I’m sure I’m not using it to it’s full potential
John, Grateful if you tell me which value have to note down L-PE or L-L/L-N while measuring the Zs in TT system as i got huge variation between two modes
Zs is always L-PE. L-L and L-N are used to determine the maximum fault current.
Very well explained, have you a video on EV testing on a TT installation
Well put together and explained John. Well done.
One cannot not compare Megger to a fluke multifunction meter. To be honest it's a fluke if you actually record the resistance of a circuit with a fluke meter and test it again and get the same measurement !!!
Megger multifunction testers are by far the best. Also comes with three year's warranty and in my opinion the leads are also better quality.
Nah, Fluke test leads are brilliant, I just can't bring myself to use them on a Megger..! The Leaderman brand from Testermans are pretty good, though, I mainly use them these days.
John Ward is a god.
Job for you John.
Video please of you testing an RCD with real cheapy equipment - basic milliammeter and an earth leak on the neutral via a variable resistor. Let's see how little money you need to spend to test RCDs.
EDIT: skip the variable resistor, just use an 8·5kohm resistor - across N & E. If it trips, 30mA RCD has passed the test.
2nd part of video - measure trip current used on RCD test buttons. If 30mA trip and in-built test circuit has resistor to give 25mA leak - and it trips - then just sit down and try to 'sell' us the reason you needed a MFT1741 - cos I think they've seen you coming !
Earth rod testing video please
Dear sir,
I have megger PAT150r,
Display show error8000 2205,
so do't used,
Cau you help me reset the megger!?
Thankyou!
When I spoke to Megger regarding my rechargeable PAT100R they told me that you could not just change rechargeable batteries with standard ones without getting it recalibrated due to the different voltages I assume that it would be the same with this range of testers.
There is a setting in the options menu to select either NiMH or alkaline.
John, thank again for a comprehensive review.....just wish I could afford one! As an aspiring sparky I've watched hundreds of videos on testing (EICR etc) and never once have I seen the IR test reading rising due to the "capacitor effect". Normally the reading immediately displays >999 ohms or whatever. Can you explain please?
Happens all the time
Cables may have been very short lengths, the effect is far less noticeable there.
Or they are doing it wrong. It's also very common to find IR tests with results that are not the maximum reading, particularly in older installations.
Hi, JW! Would you so kind toate tell me pls, which is the main difference between MEGGER MFT 1700 series and 1800 series? In particular, between MFT 1741 as you already has been presented very well in this video, and MFT 1835. Practicaly, both do the same job. Tks
The main difference is that the 1700 series is designed for use in the UK, and the 1800 series for use in other countries.
@@jwflame Tks a lot JW. Here I have only Mft 1835
Is it smart to not destroy itself or fuses when you have mains voltage connected and you go into resistatance or insulation resistance modes?
yes
Is it possible to damage the tester by plugging in the wrong colours of the leads that are attached to the mains plug ?
>
No, it and other similar testers have protection to cover situations like that - not just to cover errors in use but to also allow for installations with faults such as sockets wired up incorrectly.
great work.. your a star you make it easy for me to understand
have you done review on kewtech kt63?
thanks ross hemel hempsted
Great Video John, can I just ask you if you are using the the rcd function to test an RCBO what type do you set it to on the meter if you don't know what type the RCBO is ?
BS EN 61009 requires that Type AC has the symbol on the front, or optionally on the side.
Type A must have the symbol for type A marked on the front, so that it's visible when the device is installed.
Therefore if no symbol visible when installed, it's a Type AC.
@@jwflame Thanks John its an old Square D rcbo no markings on the front
@@acestu if it's one of the old black ones, it's probably made to BS4293, and will be type AC, as that standard didn't have any concept of other types.
@@jwflame Hi John, Not the old black ones its a QOE cream coloured one but now Shneider have taken them over I cant find any info on them Thanks for your Help BTW
Are there any down sides to the 2 lead low could you use it all the time instead of the 3 lead
It takes longer, and can be less accurate, particularly on circuits with connected equipment.
Hi John I am about to go into EV charge point installations - please could you make a video on Earth electrode testing ? 👍 Many thanks!
Don't you think that you should be going to a recognized trade course, not using ut
Please, can you do video on this with tests. Thanks
Display illumination - the baffling thing is why didn't they make the knobs and their positions illuminate too - and for that matter all its buttons. And with rechargeable batteries, it could have had a built-in work light shining out of the top side. Seems a bit pointless having illumination for such a small part of the 'tool'.
Would be great to find a suitable device to test for dead shorts on Domestic cookers.
Any basic multimeter can do that - it's just testing for continuity or resistance between the conductors.
My first placement as an apprentice is with somebody just doing EICRs. My worry is I'll blow up the tester (kewtech) by using the wrong setting. It's this possible? The company I'm working for sent out a memo to all the sparks last week saying that there'd been two incidents of electricians reenergising without removing test links in the CU (blowing the main fuse) and that now all test links must be long enough to hang out of the CU. But yes is it possible to blow up a tester using the wrong setting?
Very unlikely. Certainly possible to blow the fuse(s) inside, but selecting the wrong option isn't likely to damage or destroy anything.
A very expensive tester for what it is, I'd be more incline to go for a cheaper model, perhaps the Megger 1721, it seems to do most the relevant tests at a fraction of the cost.
Stop being a stingy spark. Real sparks buy expensive equipment.
lol
How did electricians do testing prior to these type devices coming on the scene?
Individual testers, one for each function. Typically a big case with 4 or more separate test instruments inside.
Before that, individual test devices in their own large wooden cases.
@@jwflame have you any lying around as it could make for an interesting video on the history of test equipment. Thanks John.
May I lower my bucket into your well of knowledge and ask this question. In your opinion what is the best MFT that you have used…? Great video btw :)
I just brought a MFT1741 a month ago, (as my fluke was over 10 years old and can not test type A rcd's) The price is high but why not buy the better/best MFT (tools etc do come off your tax bill eventually)
Realistically, I suspect you could adequately test RCDs without spending more than £10 on test equipment.
In fact, I can test RCDs without any test equipment at all. Just press the test button that they have on them. It's not rocket science you know.
@@millomweb A functional test of the test button is required for electrical certification but also required is the trip time in milliseconds which is also recorded on the certificate, i for one do my job right
@@ashleyrowe2681 Trip time is not a certifiable parameter for the purpose of getting a certificate of conformity. Whether it is quick enough is. All that is required to be recorded is pass or fail.
Then you bought the wrong Fluke model back then. Here in Germany type AC is not permitted for new installations since 1984, standard type RCD in residential buildings since then is the type A. So type A RCDs aren't a brand new thing which just fell from heaven yesterday. But I remember the same thing here, but there it was "my tester can't handle type B RCDs". My 2014 Fluke 1654B can handle all of them all.
And don't get distracted by that troll...he'll learn his lesson if in some time someone comes over because someone get injured by electricity and then you can proof what you did. And numbers are much more worth than simply "pass" or "fail"...
@@millomweb Oh dear, theres always a moron with a tiny bit of info getting all confused ..... I delta n is most definitely a certifiable parameter, as already mentioned the functional test using a test button is just a tick on a cert and only informs you that the mechanical tripping mechanism is in working order. The actual tripping time in milli seconds @ 1x I delta n is recorded on both Minor works & EICs & EICRs as it shows the RCD will functioning during an earth fault. You need a tester for this .
Gotta say that your shirt looks like a pajama top I'd get for my some who likes the minions. 😁
Hey John I've completed a level 2, and I have just started the c&g level 3, we are also doing the 18th edition as a part of the course.
When I pass will I be able to sign off my own work on domestic installations.
I've heard different things, but you have a lot of knowledge so I wanted to hear your answer.
Thank you
Two seperate things:
1 - testing what you have installed and completing the certificate (minor works, installation certificate). Required for all installations.
2 - notifying the few things in domestic situations for Part P - only needed for consumer units, new circuits and items within the zones of bathrooms.
If you have done the L3 and the 18th, then you can certainly do 1 - that's just part of doing the job.
If you want to do 2, you will need to join one of the competent persons schemes and pay whatever their annual fee is.
Hi, JW great videos as always. I have a question,if you don't mind. I'm going to buy a 10 way.18th edition consumer unit. Do I have to buy RCBO.for it. or just normal RCD. I'm going to get a qualified electrician. Keep the Videos coming.all the best.
If you're not sure, get some advice from your electrician... He/she is the best person to advise.
@@ashmanelectricalservices4318 John isn't running the channel just for electricians mate 🙄😒
Mark asked a genuine question & also said he has an electrician to do the job...
I'm not an electrician either but I read it as he is trying to save a bit of dosh whilst still getting a proper job done ... whereas his electrician may be pushing the uber-expensive RCBOs ... just my take ... if YOU are a qualified electrician maybe you might try to answer his question... 😎👍☘🍺
@@peterfitzpatrick7032 It would be unfair to expect JW to advise Mark on what consumer unit to get without seeing the installation and assessing the potential demand, that's why I said the electrician doing the job would be the best person to ask, if you have any concerns about the electrician being untrustworthy and ripping people off, then my advise would be to hire another electrician.
Peter Fitzpatrick thanks for your input. I don't want to purchase a new consumer unit.
And 2 years down the line.its out of date. I haven't got a electrician to carry out the work,yet.
I was just asking for some advice.on what consumer unit is best.to purchase,at the moment.
Dual RCDs would be the absolute minimum. RCBOs are a much better option.
Type S RCD?
Thank you for the video. How can it supply 250-1000V by just using 4x AA batteries?
Battery supplies an oscillator, which then supplies a transformer to increase the voltage, output of that rectified to produce DC.
@@jwflame thank you. Your videos are extremely informative!
@@jwflame Did you say six AA batteries, four on the top and two underneath !
Why does it warn if you use 1kV leak test? It’s quite annoying.
Jesus thats a bunch of test functions on the megger if you're in the field you get pretty all scenarios covered. Mail them to make an attachment to the missing instructions. Like to see the earth rod testing . Can i use some high voltage 10MOhm resistors as refence for any insulation tester ?
Well just bought 10Mohm resistors 10KV voltage rated to use as reference . The insulation tester model is ut501A and it is in spec with resistors and a DMM with 10M internal impedance. Also got one faulty wall socket on kitchen :(
The search words are vr68 10M
I'm not entirely convinced that the earth clamp _should_ be coloured green/yellow. Yes, it's connected to PE, it's measuring PE, but it isn't, itself, a PE lead. It fills no earth protective function in the device, and could additionally fall off at any time because it is an alligator clip. Therefore, it seems to me that it would be practically a code violation to colour it green/yellow.
Indeed if anything it should be cream... It's a functional earth
and from 2020, functional earths are pink.
Pink test leads for everyone.
@@jwflame To be honest, FE's being pink is a bad idea. It's only been 15 years since red/black was 'de rigeur' and some shades of the red definitely went on the 'whiter shade of red' (especially FP200 style cables). It's a potential minefield on new retrofit boards to have an FE wire from an RCBO that is potentially the same colour as a line/phase conductor from 2004. What was wrong with cream? FE wires have been cream from at least the early 80s (mostly used by British Telecom).
On the original point... Green is a good compromise in the UK at least. It's not used for anything else, which surely is the main objective for a test lead, unambiguous usage.
@@jwflame Big Clive approves!
Also it's not just an earth, it's also used as a phase conductor for some measurements. Similar for the blue lead, it can be either a neutral or a phase depending on the test being performed.
I do not understand why you would want/need to do a RCD ramp test at both 0° and 180° - surely they would always be the same result unless the tester can somehow increase the applied simulated earth leakage current at a rate of greater than 10ms
Hi Guys
New technology is now available, there is no longer any requirement for earth rods for EV chargers.
It's a frustration that none of the mainstream MFTs can measure up to 1000V despite them all having 1000V insulation resistance tests. That makes them impossible to use on solar systems which can have DC voltages up to 1000V.
This is exact shape as MFT1731. When I had the 1731 one bad point I noticed on it it were the batteries poping out when trying to put them in! The battery holding design is Bad for an expensive tester!
Has anyone noticed how poor the screen quality/clarity is on their 1741. If I look at the display straight on, its very fadden grey display. I have to look at it from a lower (6 o'clock) angle to get a clear view. On a bright day its very difficult to see display at any angle. Its only 3 months old.
New batteries required or there is a fault with it.
@@jwflame tried the new batteries but still no joy. I think its just the type of LCD used. You find same thing on cheap digital watches, so i might just stick it out until normal life resumes as device still works.... Ps Mr JW, Love the channel and content. Keep it coming and All the best. ✌