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Discuss Megger Mft 1730 calculating R1&R2? in the Electrical Tools and Products area at ElectrciansForums.co.uk.

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  1. widdler
    Offline

    widdler Trusted Advisor

    Location:
    North East
    A student of mine had his new toy delivered today (delivery first thing, thank you very much Tester Meter). We've had a play with it and I am surprised to see that it has a method of caculating R1&R2 as what appears to be normal practice.

    You turn the dial to Zref, make a loop impedance measurment (at the Ze or Zdb position) and it is stored as the reference value.

    You then change the dial to R1&R2, make a loop impedance measurment at the Zs position, the readout will then display the R1&R2 value by deducting the reference value from the value obtained at this position.

    I don't like this.






    Also in their instructions it says that with storing the data R1 = cpc and R2 = Live??

    I might have to send them an email.
     
    • Like Like x 3
  2. Amp David
    Offline

    Amp David Trusted Advisor

    Location:
    Glossop
    It makes it easier for the lazy testers out there to get to their next job quicker, not the best idea.
     
  3. MarkieSparkie
    Offline

    MarkieSparkie Guest

    Second that Widdler. My apprentice bought one and we had a play with it before he used it in anger. I was gob-smacked by this and immediately wrote a letter of complaint to Megger highlighting this blatant use and encouragement of bad and inaccurate test practice.
     
    • Like Like x 1
    Last edited by a moderator: Jul 28, 2011
  4. Amp David
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    Amp David Trusted Advisor

    Location:
    Glossop
    Have they replied to you yet Markie?
     
  5. contract harry
    Offline

    contract harry Guest

    I got a couple of these and the whole R1+R2 calc is nonsense. Also there are supposed to be issues with the Auto null, although mine have been Okay so far. HOWEVER, the phase rotation and two prong no trip ZS has made it a massive hit with the lads. The clamp is pretty cool too. H
     
  6. 335-pilot
    Offline

    335-pilot Guest

    I was thinking of buying this meter but having read this post am back to square 1, Any suggestions? I would like to get a meter that has software capability to run the paperwork if its not too much more
     
  7. nikmet
    Offline

    nikmet Electrician's Arms

    Location:
    Leicestershire
    Is the clamp included in the price or extra ££
     
  8. onions1066
    Offline

    onions1066 Electrician's Arms

    Location:
    Nottingham
    DO NOT BUY! i have one of these testers and i have found a couple of annoying problems with it, ZE/ZS readings take forever! about 20 seconds to get a reading, doesn't sound long but when you have every point to do it does become tedious. I also get ridiculous readings when testing wylex consumer units? Megger rep came to visit us and had no answer for this. They are going to take it back to the factory and see what the issue is with reading through wylex RCD's? for the time being been told to calculate all ZS's! so thats right the tester can calculate it's own R1+R2's and now i have to calculate ZS values! doesn't really leave me much to do. on the bright side the auto test and the RCD is very good but other than that i am not impressed at all. Just to clarify a couple of points i'm not really using the auto calculate for R1+R2 and i am not calculating ZS values i have gone back to the trusty robin kit while i await clarification from megger, because until it is sorted i believe the results i am getting arent worth the paper they are written on. But when all the problems are sorted i believe it will be a good piece of kit and when they are sorted i will let you guys know.
     
    • Like Like x 1
  9. onions1066
    Offline

    onions1066 Electrician's Arms

    Location:
    Nottingham
    if the clamp is included i will be pretty annoyed because we didnt get any! thats something else to moan about!
     
  10. Guest123
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    Guest123 Guest

    >Coughs<...Fluke...>Coughs<...:donatello:
     
    • Like Like x 2
  11. richy3333
    Offline

    richy3333 Trusted Advisor

    Location:
    UK
    Well I am/was a Megger man through and through but I just wannna chuck my 1730 out of the window!

    The iclamp is not included with the tester, that's another £210 + VAT!

    I can't get Powersuite to work (it's something to do with the software, not the MFT)

    I'm now getting a wide variation on Zs readings from my 1730 when compared to my 1552. So it's likely I have a week of testing to double check! :( - 16A type B. 1552 = 0.83 ohms. 1730 = 2.59 ohms? The tests are done fast on the 1730 though, only a few secs, not 20+ as other posters have mentioned
     
  12. 335-pilot
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    335-pilot Guest

    Anyone know if the 1710 is any better?
     
  13. BigBreakfast
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    BigBreakfast Guest

    I must admit to liking the 1730 but I stay away from the gimmiky ZREF , not for real testers that option! About the only niggle I have with using it is the long time to do Zs compared to fluke or seaward, otherwise the tester has performed well and no wild readings that I have noticed. Software loaded without trouble too. Only had it for short while though, so still time for gremlins to appear.:willy_nilly:
     
  14. onions1066
    Offline

    onions1066 Electrician's Arms

    Location:
    Nottingham
    if you are getting Zs readings in a couple of seconds you cant be using the non trip 2 wire test? the wild reading tend to be on wylex consumer units, Megger are aware of this and are going to update the software so if you have got one it would be worth contacting whoever supplied it to you to see if they will update yours for free as well?
     
  15. richy3333
    Offline

    richy3333 Trusted Advisor

    Location:
    UK
    The readings were taken using the 'kettle' lead off a regularly used test socket and compared against my 1552. Admittedly it is a Wylex rewirable board.

    You'd expect the unit to be 'right' as it came from Megger direct
     
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