Re: vacuum pump

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: vacuum pump
From: Tesla List <tesla-at-stic-dot-net>
Date: Mon, 14 Jul 1997 08:26:55 -0500
Approved: tesla-at-stic-dot-net


From: 	Joe Cummings[SMTP:joecmn-at-globalnet.co.uk]
Sent: 	Monday, July 14, 1997 5:29 AM
To: 	Tesla List
Subject: 	Re: vacuum pump

At 14:15 13/07/97 -0500, you wrote:
>
>From: 	Richard Wayne Wall[SMTP:rwall-at-ix-dot-netcom-dot-com]
>Sent: 	Sunday, July 13, 1997 5:15 AM
>To: 	Tesla List
>Subject: 	Re: vacuum pump
>
>Kristian wrote: 
>
>>> performance of it, I find that the ultimate vacuum is measured in
>>> microns
>>1 micron = 1 mTorr = 1 micron of Hg = 1/1000 mmHg
>
>The last line is incorrect.
>
>MilliTorr = 1/1000 mmHg
>
>Micron = 1/1,000,000 mmHg
>
>RWW

Some confusion here.

A "micron" is defined as a micrometre, or a millionth part of a metre.

All the prefixes - micro, mega, centi, etc., qualify the standard unit, the
metre.

Happy mensuration,

Joe Cummings