missing earth?

[Ian0999]

I have extended the ring in my living room, adding an extra 3 sockets. On completion I used a socket fault detector which gave the all clear. I then disconnected the 3 sockets in order to carry out decorating and repairs and to finish fitting a new floor. I connected the wires using chocbloc to maintain the circuit. All connected sockets worked fine with power tools etc. I have now come to re-connect the additional sockets and I tested the first with the socket tester - fail, 'missing earth'. I have since checked all the earth connections in the room and all are ok but I get the 'mising earth' fault on the tester plug. I then started to check each socket in other rooms and in each case got the 'earth missing' fault. I also get this in the upstairs sockets which is a separate circuit.
The tester is new, only used once before. Are these testers reliable? It is a TIS1000.
I'm at a loss. Any ideas?

 

[Harry Bloomfield]

Have you checked the original pre-existing sockets with the tester, do they show a fault too?

Have you tested it on another socket circuit?

 

[AndyPRK]

check your tester in another house if you can.

inspect earth at the incommer

 

[ericmark]

The earth loop tester have a range 1.7 Ω to 500 Ω but the tester your using simply does not say what point it shows as earth loop impedance too high, the

version with loop test uses 1.8 Ω and 92 Ω rather than the 1.7, 5, 10, 100, 200, 500 Ω tested with the Martindale EZ165 which means with a TT system (uses earth rod) it really tells you nothing. And the one you have

tells you next to nothing. I think it is quite funny that a tester to check earth says it is class II and does not need an earth. Even this

Seems a bit useless when with a British ring final with a B32 MCB when 1.37 Ω is the pass mark, so it shows the pass mark for a 25.7 amp type B MCB I would assumed designed for Europe where they don't use a ring final. So would show a 25 amp type B radial as OK. The Martindale EX2500 at £130.20 is the cheapest I have found.

 

[ericmark]

The tester you have it seems sold in Lidi for £5 see https://www.diynot.com/diy/threads/just-bought-these-opinions.567303/

 

[Ian0999]

Thanks guys, someone else has told me the tester isn't much use. I've a friend coming round later to check it for me. Your help and advice is much appreciated.