Accession Number : AD0650914

Title :   PRESSURE MEASUREMENT IN THE 0.0001 TO 0.0000001 TORR RANGE,

Corporate Author : AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Mangold,Vernon L.

Report Date : DEC 1966

Pagination or Media Count : 25

Abstract : The report describes the results of an experimental program to establish the accuracy of pressure measurement in the 0.0001 to 0.0000001 torr range using a 'calibrated conductance-type pressure measurement system'. The data collected during the study is discussed and tabulated. Results of the study indicate that the calibrated conductance-type measurement system investigated can be considered as a standard-type calibration device for the pressure range of 0.0001 to 0.0000001 torr with a maximum uncertainty of 10.3 percent. The difference between the system pressure calculated from measured conditions and a calibrated (McLeod) ion gauge was found to be 3.7 percent maximum in the range 0.00001 to 0.0000001 torr. (Author)

Descriptors :   (*VACUUM, MEASUREMENT), (*PRESSURE GAGES, ACCURACY), LOW PRESSURE, INSTRUMENTATION, CALIBRATION, IONIZATION GAGES, STANDARDS

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE