Megger 1730 non trip loop....

[Midwest]

Well said mate, it's scandalous that this issue is still going on. If this was a car the VOSA would have issued a mandatory recall by now ... Megger appear to have adopted a mushroom consumer relations policy ... feed them enough manure and keep them in the dark.

I'm thinking of buying the 1730, has this issue been resolved yet?

 

[trypod]

latest firmware 1.10

I think most issues have been resolved

 

[MarkieSparkie]

I'm thinking of buying the 1730, has this issue been resolved yet?

Megger say that Firmware version 1.10 has fixed it (as 1.09 was claimed to and failed, again!), but I'm unable to verify this at present, my guinea pig (apprentice) will be carrying out a field trial next week. However, there is a temporary work around, i.e. reverse the polarity of the two wire test leads, which works for virtually all firmware versions in most cases.

 

[trypod]

latest firmware 1.13

 

[stevey1983]

how do you update the firmware?

 

[MarkieSparkie]

As Trypod has indicated there have been multiple updates in recent days (more empty promises!). As soon as there appears to be a stable firmware we will conduct another trial. This protracted situation is sure to be denting Megger's previous good reputation.

 

[trypod]

To be fair to Megger I have not had any issues will firmware V:1.09 or 1.10

 

[Vito04]

Just received a loan MFT1730 from megger whist mine as the latest no trip firmware upgrade. The loan tester's version is 1.13 so fingers crossed

 

[trypod]

latest firmware V2.01 on mft1720's & mft1730's

 

[Sparky Ninja]

Hi guys,

I am recycling this old thread as it seems to be on topic.

I am currently writing some reviews for the megger 1700 series, I have each of the three models at my disposal and what I would like to know is if any of you are still having trouble with them - and what version you are on.

The models I have are the 2.01 and all seems to work okay, whilst one of my students had the same model (the 1720 in this case) and his was 1.26 or something. His was tripping Wylex RCBO's and noticeably, a couple of the selectable options such as 2 lead no trip were absent on some of the selection possible.

So, is anyone having any trouble/complaints with these MFT's still?

Thanks

widdler

 

[applemac]

my 1730 is a year old and going back to dover for a software upgrade and calibration,

i hear its sorted most faults out, still like it to much to change it....

 

[MarkieSparkie]

Providing you ignore the dubious value of Zref, R1+R2 and two wire loop testing, the release of firmware version 2.01 appears to be stable and have the MFTs working the way they should have done at their release a year ago. Any further updates to the firmware should only be the occasional optimisation tweaks from now on (fingers crossed); time will tell.

​

 

[Vito04]

Just received a brand new 1730 replacement (2.01).

Since my original post they managed to lose mine but all seems to have been solved now.

 

[Sparky Ninja]

I've played with the 1720 this evening, and I noticed that the loop test when carried out at '2Lo' gave a much higher reading as the old fashioned no-trip '3Lo'.

0.39 ohms on 2Lo
0.18 ohms on 3Lo

A 10m or so cooker circuit with a Ze of 0.12 ohms when tested on 2Hi.

So the 3Lo seems within expectations, but the 2Lo just seems pointlessly inaccurate.

 

[SPARTYKUS]

As stated in another thread, it was released "tested enough" (as in not enough), and we (sparkys) have been completing their final testing phase (User testing) and paying them for the privilege.

 

[trypod]

latest firmware V2.05 on mft1720's & mft1730's

How many more updates?

 

[SPARTYKUS]

Until the mass populous of working electricians that bought an untested meter, have performed the necessary out in the field testing on behalf of the said meter manufacturer?

 

[MarkieSparkie]

latest firmware V2.05 on mft1720's & mft1730's

How many more updates?

My contacts at Megger's Technical Department tell me they are:- still working towards a solution for the variable and inaccurate two-wire loop measurement and to expect further firmware tweaks in the coming months as this is now an iterative process (to me the whole development process has been iterative).
Personally I'm just ignoring two-wire loop measurement completely. I'm happy using the MFT within the current limitation and will now wait until the annual calibration next year for a firmware update by which time, hopefully, the iterative process will have achieved its goal and accurate two-wire loop testing will be at last be possible.

 

[Vito04]

Here we go again,

I've been out to another job today with Wylex NHX RCBO's and have been unable to Zs test any circuit because they trips. I really wished i never upgraded from my 1553

 

[MarkieSparkie]

Here we go again,

I've been out to another job today with Wylex NHX RCBO's and have been unable to Zs test any circuit because they trips. I really wished i never upgraded from my 1553

We haven't had any problems testing with Wylex RCBOs since firmware update 2.01. You could reverse the connections of red and black probes at the test-points (black on L, red on N and green on CPC), as a work-around solution, like we use to do earlier in the MFTs evolution.