I'm not too well versed in this 1950's bakelite lab equipment stuff!
Maybe somebody can help me out figuring out how to run it?


I picked up this BEAUTIFUL Honeywell-Rubicon 2730 "potentiometer".
It's a lot more than a standard pot!

It has a fancy dial calibrated from zero to 75 millivolts, a Eppley standard
cell inside, several other controls cryptically labeled "R" and "C", plus a
few push buttons with unhelpful labels like "SO", "A", "B", "C".

Oh and it has this optical scale galvanometer that once started, will swing
for almost a minute before it settles down to a reading.

-- and -- it has this less than beautiful faux-woodgrain formica case.
I guess wood was out of style that decade.

Any ideas how one would operate such a device?

Probably a wheatstone bridge-- but what buttons do you push??

Regards,


George