I have two master V meters. One I bought back in 1973 and the other I bought on E-prey for $26.00 (new old stock in the box). The first meter, I've used over the years and was starting to get off in it's readings. I used to leave it in the unlocked position, but stopped doing that because I figured that when the case is closed that the case was pressing in on the button anyway and was holding it unlocked. (kinda like the refridge light going out when the door is closed.... no way to really check that). I had hoped that the second meter would be good, but the cell in it was weaker than the one I already had. So, I sent them both to Q.L.M. with instructions to replace the cells, check the needle balance and calibrate them to both read the same. I got them back on monday and they are perfect! My neighbors think I'm crazy, walking around metering everything twice. The cost per meter was $66.00 ea. I think that is a good price to pay for a quality built meter.
dee
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