I recently picked up this tester sold as "without leads therefore untested" for a reasonable price, obviously I don't believe that it wasn't tested.
Anyway the price/functionality ratio looked good enough to give it a go, besides I quite like all the Metrix equipment of that era that I've used.
Upon first tests the U.I. is pretty basic and will take some time to get used to, (obviously absolutely no documentation to be found throughout the WWW), only low Ohm measurement seems to work correctly, other tests will not run as the meter shows a false voltage reading of about 80V and will not allow tests to run on a live circuit.
Leaving the meter powered long enough voltage reading drops low enough for the insulation test to run, test voltages are well below normal on all ranges, resistance measurement is off by a few MOhms for a test resistance of 10MOhm (DMM input).
On opening the meter, battery compartment has some remains of leakage, main PCB has small signs of corrosion, so with a little luck I may get away with a good wash.
The odd thing is that the main PCB is marked "Metrel", so nothing to do with Metrix... Unless Metrix maybe designed the front panel PCB.
So just in case there is more information available with Metrel, I'd be curious to know if anyone can tell me of a Metrel model that is mostly equivalent to the Metrix branded meter I have?