OP
CLB
You can reset the Metrel3000 back to it's factory state by holding down the right arrow key and then switching it on. Mine froze a couple of days ago and the manual that came with (on the cd) said how to reset it and it worked fine after that.
And yes, it has Loop Z for Ze readings. Earth croc onto disconnected supply earth, L & N test leads onto L & N terminals of the supply and got 0.14ohms. However, if you use the plug lead for testing for earth faults at a socket outlet you have to set it to Loop Z(RCD) which prevents the rcd tripping.
(Reset info is on p21/22 of the user manual http://bit.ly/NDcPJZ )
And yes, it has Loop Z for Ze readings. Earth croc onto disconnected supply earth, L & N test leads onto L & N terminals of the supply and got 0.14ohms. However, if you use the plug lead for testing for earth faults at a socket outlet you have to set it to Loop Z(RCD) which prevents the rcd tripping.
(Reset info is on p21/22 of the user manual http://bit.ly/NDcPJZ )