A MODIFIED MICROCOMPUTER-CONTROLLED PROPORTIONING VALVE INSTRUMENT FOR PROGRAMMABLE DILUTION OF GASES

Authors
HAAKENSON TJ FARWELL SO MACTAGGART DL PAPILLION J BAMESBERGER WL
Citation
Tj. Haakenson et al., A MODIFIED MICROCOMPUTER-CONTROLLED PROPORTIONING VALVE INSTRUMENT FOR PROGRAMMABLE DILUTION OF GASES, Instrumentation science & technology, 23(4), 1995, pp. 277-289
Citations number
9
Categorie Soggetti
Instument & Instrumentation","Chemistry Analytical
Journal title
Instrumentation science & technology → ACNP
ISSN journal
10739149
Volume
23
Issue
4
Year of publication
1995
Pages
277 - 289
Database
ISI
SICI code
1073-9149(1995)23:4<277:AMMPVI>2.0.ZU;2-G
Abstract
A commercial VG-400 gas dilution apparatus from Microsensor Systems, I nc. was modified with an updated microcomputer, revised software, elec tronic mass flow controllers, and a needle valve pressure restrictor i n order to enhance its performance. The instrument's maximum linear di lution factor has been extended to 330,000 from the previous practical limit of 100,000 while its dilution accuracy, precision, resolution, and stability have been increased. The modification also decreased the fluctuations in the instrument's output concentrations to less than o r equal to 1.5%.