On Mon, 29 Oct 2012 10:40:12 -0500, Jamie
t wrote:

step up transformer of some kind?

Jamie

No. Doubt it. This is the sort of thing I'm stumbling across.

http://www.datasheetcatalog.org/data...r/CS8191-D.PDF

Sort of implies a highly idiosyncratic measurement system and, at the least,
a specialised meter movement.