vacuum pump

From: 	doug swanson[SMTP:des-at-ellijay-dot-com]
Sent: 	Friday, July 11, 1997 6:27 PM
To: 	Tesla List
Subject: 	vacuum pump

In my quest for Tesla related "stuff", I've acquired a vacuum pump,
second hand, in hopes that what it is will be what I need.

While looking through the paperwork I find references as to the
performance of it, I find that the ultimate vacuum is measured in
microns.  In this case, 100 microns or better (tested to 25 microns). 
I've heard of vacuums being measured in Torr, and in inches of Hg, but
can anyone out there enlighten me as to how I can convert this unit of
measure to something that I can understand?

I had hoped to use it to pump down capacitors, and would also like to
use it to evacuate glass tubes and bulbs.  But I don't know if this pump
is able to do it, or if it is actually too much for the job.  Originally
I think it was owned by an air-conditioner service person, if that helps
any.  (No it isn't a freon recovery unit, just a vacuum pump...)

Thanks for any information that will be of use!