Oh yeah, let me give you a couple of things I did/followed.
The article I found says anything over .4 volts is too high and means your antifreeze additives are depleted therefore needs to be changed. But then I watched a powernation video 2 min tech and it stated anything under 1.0 volt is acceptable. I really don't know which is legit...
I just really found it odd that the antifreeze made the reading go UP to 1.0 from .7 volts.
I did the reading both engine off(temps up to 190), and engine on(same temp range). The voltages did not change, they were the same running engine or engine off key off.
Here is the article I followed:
http://ve-labs.net/electrolysis-101/how-to-test