Re: vacuum pump
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
>>> performance of it, I find that the ultimate vacuum is measured in
>>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
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