Patent · US Expired

Method for the direct presentation of a differential measured quantity in terms of its correct physical unit

US5065613A · kind A · utility

8Cited by

6References

5Claims

0Family size

Assignee

ROSEMOUNT INC. · US

Inventors

Michael Lehnert · Rodenbach, DE
Ulrich Modlinski · Alzenau, DE
Rudi Roess · Bruchköbel, DE

Key dates

Filing date	Mar 19, 1990
Grant date	Nov 19, 1991
Priority date	—
Expiry date	Mar 19, 2010

Classification

Technology area (CPC G)Physics
CPC primaryG01D3/02
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for the direct presentation of a differential measured quantity, in particular, a differential gas concentration measurement, in terms of its correct physical unit is disclosed. A characteristic curve representing the output of a gas sensor detector as a function of gas concentration is obtained in an absolute coordinate system. A reference level at which the differential measurement is to occur is defined on this characteristic curve by a defined input or, respectively, output value. This reference level defines the origin of a differential coordinate system from which the differential measurement may be directly ascertained.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.