Gas analyzer with regulated measurement gas feed and dynamic dilution of samples
US5487312A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1994 |
| Grant date | Jan 30, 1996 |
| Priority date | — |
| Expiry date | Oct 7, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87627
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A choke-bypass system is arranged upstream of the gas analyzer so as to generate a constant input pressure at the gas analyzer. The measurement range of the gas analyzer can be expanded considerably beyond the standard range while maintaining accuracy of measurement when the measurement gas is diluted with an inert gas above a given gas concentration threshold in such a way that the gas concentration in the gas analyzer remains constant. To this end, a dilution gas line (12) with a control valve (13) for continuous dilution of the measurement gas with the inert gas is connected to the choke-bypass system (1), (2), (3), (6). Further, the detector (3) of the gas analyzer is connected on the output side via a computer (10) with a dilution regulator (15) which readjusts the flow of inert gas via the control valve (13) in such a way that the amplified detector output signal is maintained at a given reference value, wherein the measurement gas flow is increasingly diluted as the measurement gas concentration increases. The dilution is then measured by a flow meter (14) arranged in the dilution gas line (12) and this measurement signal is processed together with the detector signal in a c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.