Asternia stars. now with solutions, and stray voltage

[gregzz4]

First of all, IMO, putting in a grounding probe to solve stray voltage is not the best idea. But that is a discussion for another post. As is my original question really.
So what you read was 0.2v with it set to 10vAC. Hardly anything to worry about.
Just make sure your tester is working in your outlet.
Set it to 250vAC, put the positive in the smaller slot and the negative in the larger slot. You should see anywhere from 110-120v.
Now put the positive in the same small slot, and the negative in the ground socket. You should get the same readings again. This tells you your outlet is wired correctly and the meter works.
Read up lots on Harlequins before you buy them