Picked this up yesterday, appears to be all there & function

Anybody got the manual for this toy er I mean important tool?

Sun BST-6  Ser 30A-130

there is a yahoo group for Sun stuff, they often have the manuals, I will get the info

Skip

Looks like a old battery/ Charging sys. tester..  Over 45 years since I used one.. and it was already old equipment at the shop...
http://www.google.com/imgres?imgurl=http://i.ytimg.com/vi/CV_-B3qI6Dk/maxresdefault.jpg&imgrefurl=http://www.youtube.com/watch?v%3DCV_-B3qI6Dk&h=1080&w=1920&tbnid=_Qf45NsxlSpK-M:&zoom=1&docid=Qbq8HhnL06c2yM&ei=78ZnVeWSNdbtoAT57oP4CQ&tbm=isch&ved=0CD0QMygWMBY

Is that one of the old "carbon pile" testers? I don't know if I've got the name right.

Cool old machine regardless.

Yes, you got it!  Haven't herd that term for awhile..
https://www.google.com/search?q=old+%22carbon+pile%22+testers&sa=X&rlz=1T4PLXB_enUS635US636&biw=1366&bih=589&tbm=isch&tbo=u&source=univ&ei=W_lnVYPmI8HSoATm8YLoBg&ved=0CB4QsAQ

I used one of those almost daily , back in the 60's. I worked at an Ignition /electrical shop.
The customers were always impressed with the " Gizmos"
We always called it a carbon pile tester, or load tester.
Sold a lot of batteries with them. Easy to demonstrate to a customer the difference between a new and bad battery.
Sorry , can't help with a manual.