I know this is an oddball, as not too many people have Baratron calibration systems. I had to do an adjustment on a Tylan General Baratron (Capacitance Diaphragm Gauge) yesterday for which my thumbs and forefingers are still badly bruised from hours of turning valves (waiting for funds to get electronic valve setup).
I was calibrating a Tylan General CDLD-31S12, 1000 Torr Baratron. There are three adjustment pots hidden under the side label that adjust gain and linearity. I am guessing (after hours of experimental adjustments) that of the two together on the right side, the left one is SPAN and the right one is 50% LIN, and the third pot recessed on the far left may be 10% LIN. But I'm not sure.
If anyone happens to have experience on this and knows which is which, please send and let me know. My fingers are still hurting (getting old, you know).