John,
Thanks very much for the info...I think.
Looks like the one I've got should be used for testing the coffee pot, or maybe the hair on the neighbors dog's back. [Linked Image]
It's already helped me to find a hot connection on an energized xfrmr, and although not totally accurate, I'll still be able to make comparative tests. (About $100, 8-1 ratio,etc).
$20K is more than my company truck's worth!