Vacuum Standards

Started by GA_PMEL_RF, 06-16-2015 -- 05:33:59

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GA_PMEL_RF

06-16-2015 -- 05:33:59
What Standards are now in use for Vacuum Gauge Calibrations?
The CVC  GPH 320C is obsolete and I was looking a a simular gage to Zero our MKS Gages. What is a suitable replacement?

Hawaii596

#1
06-16-2015 -- 13:40:35
There is a variety of options available.  I have an MKS system, and use a combination of mechanical pump to get down to around 100 mT or so, then the Alcatel turbo to go down to 10E-06 Torr.  There are a variety of reading gauges that go down pretty low by MKS (can't think of the company that owns them now - but they are still around).
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

silv3rstr3

#2
06-17-2015 -- 05:16:32
We own a custom built three pump system that will pump down to 10E-07 Torr.  It utilizes Pfeiffer Vacuum pumps, MKS spinning rotor gauges, a Granville-Phillips (GP) controller with GP and Duniway Stockroom Corp ionization gauges, and a LDS controller with LDS convectron gauge tubes.  We are going to have to add or upgrade turbo pumps in the near future to be able to achieve somewhere in the 10E-12 Torr range.  Any suggestions?
"They are in front of us, behind us, and we are flanked on both sides by an enemy that out numbers us 29:1. They can't get away from us now!!"
-Chesty Puller

GA_PMEL_RF

#3
05-05-2022 -- 07:20:55
We have a turbo pump and the MKS standards with Isolation valves.  Got a 690AA donated to our lab from Farley I&C.  Finally got to test it and it's cool standard.  Come with 270A indicator. Going to send it out for calibration so we can use it for some onsite calibrations and in lab cals.
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