Metrel MFT 13A plug connector

[DNS1]

Bought my MI3000 recently and I'm well pleased with it.

Checked my first install recently with it and very pleased with how user-friendly it is.

However, I did note that I had problems doing R1+R2 using the 13A plug lead included with it.

No trouble at all using it to do the insulation testing (I had to test at various points to find a nicked cable) but I couldn't set the machine to measure resistance between line and earth.

In the end I got a normal plug, drilled holes in the top and used the probes!

Anyone know if I can use the the Metrel 13A plug lead to do R1+R2 testing?

 

[Deleted member 26818]

As far as I'm aware no you can't.
I'm also not aware that you can use it to conduct an IR test either.
In both the continuity test and the IR test, the earth and neutral probes are shown in the manual as being linked together, the linked probes are then connected to one wire under test, and the line probe connected to the other wire under test.
The 3 pin plug lead keeps the three probes separate.
It may be that the earth probe doesn't actually have to be linked, it may be that it can be left hanging, and only the neutral probe is required for testing.
Unfortunately I've lent my meter to my brother, so am unable to confirm whether there is any difference in the values measured with or whithout the earth probe connected.
I would imagine though, that your IR results only refer to the IR between line and neutral.

 

[Octopus]

My Metrel Eurotest AT can do what you want to do, doing the R1 + R2, link the cables at the CU and use the plug at the socket. As for the IR tests on mine you can use "auto" or select a specific test between cables.

Have you tried the manual, not the silly on printed out, the one on the CD.

Having said that the Metrel handbooks are rubbish

 

[Richard Burns]

The R1+R2 test is actually done using the brown and blue cables! (on my MI3002) so when you try with the plug lead you are testing continuity between line and neutral and so it does not work, a bit of a failure on the designers part.
You would have to use a tester plug to test R1+R2 at a socket and connect brown to line and blue and green to earth.

 

[durhamspark]

I had the same thing with my metrel 61557 eurotest, and had to make up a plug top with flex or use an adaptor to test R1+R2 at sockets. They seem to have realised this problem though as the 3125B can be used with the supplied plug, as murdoch says, you select on the tester which cables you want to test between.

This is very handy for IR tests as well cos you don't have to swap leads around you simply connect a lead to each and select the tests on the tester.

 

[D80]

If you use the MI3000 to test for insulation resistance all that is tested is between L-N. L-E and N-E isn't tested, so its not really any good.

The little Kewtech socket adaptor1 is great for R1+R2 testing, and you could I guess use it to do IR testing as well.

Kewcheck R2 Socket Adaptor - R2 - Test Without Removing Wall Socket

The MI3000 test leads plug into this perfectly. If you get one you'll probably end up also adding a single socket with L-E linked out so you can null the test leads+unit.