Accession Number : AD0281872

Title :   CALIBRATION OF IONIZATION GAGES USING A POROUS PLUG AND ORIFICE,

Corporate Author : ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AIR FORCE STATION TENN

Personal Author(s) : Owens,Charles L.

Report Date : AUG 1962

Pagination or Media Count : 28

Abstract : Aerospace research and testing have placed stringent demands on the capabilities of calibration laboratories in the area of very low pressures. The choice of pressure gages and the interpretation of readings obtained are of considerable importance. Quite frequently it is possible to obtain a gage having the desired characteristics. At pressures lower than 1/1000 torr the choice of gages is limited, and the calibration of these gages at low pressures becomes more difficult. The method of calibration described is a result of efforts to improve calibration capabilities in the low pressure area. Commercially available standards were found to have limitations that were not acceptable for calibration purposes. An alternative method was utilized which depended upon fixed and calculable constants of the calibration system. This method was used to obtain reliable results to 10 to the -7th power. (Author)

Descriptors :   *IONIZATION GAGES, CALIBRATION, VACUUM APPARATUS

Distribution Statement : APPROVED FOR PUBLIC RELEASE