| Development and performance analysis of a standard orifice flow calibration system. | |
| | |
MedLine Citation:
|
PMID: 19655977 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
|
An orifice flow system has been developed indigenously which is a primary standard for the calibration of high vacuum gauges in the range of 10(-3)-10(-6) mbar. It consists of a constant-volume flow meter, designed to generate a known flow rate of a particular gas to the vacuum chamber. This chamber is partitioned into two parts by a plate with an orifice of calculable conductance. The pressures, generated by this standard system, are compared with those of secondary standard, namely, spinning rotor gauge. Different uncertainties and correction factors are calculated. The maximum percentage deviation is from 1.16% to 0.97%. The combined uncertainties over the entire calibration range of the standard system are in the range of 4.0 x 10(-6) mbar. |
| | |
Authors:
|
H M Akram; M Maqsood; H Rashid |
Related Documents
:
|
4020057 - Digital venous anatomy. 9137227 - Simultaneous determination of aortic valve area by the gorlin formula and by transesoph... 2723277 - Sources of variability for doppler color flow mapping of regurgitant jets in an animal ... 157337 - The human dura mater valve. fabrication methods. 17155367 - Flow rule, self-channelization, and levees in unconfined granular flows. 2583737 - Regulation of total leukocyte, neutrophil and lymphocyte concentrations in human blood ... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: The Review of scientific instruments Volume: 80 ISSN: 1089-7623 ISO Abbreviation: Rev Sci Instrum Publication Date: 2009 Jul |
Date Detail:
|
Created Date: 2009-08-06 Completed Date: 2009-10-09 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0405571 Medline TA: Rev Sci Instrum Country: United States |
Other Details:
|
Languages: eng Pagination: 075103 Citation Subset: - |
Affiliation:
|
NINVAST, National Centre for Physics Complex, Shahdara Valley Road, P.O. Box # 3125, Islamabad, Pakistan. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Reciprocating flow-based centrifugal microfluidics mixer.
Next Document: Design of a high-pressure circulating pump for viscous liquids.