Patent · US Expired

Method for testing a measuring sensor

US6266993A · kind A · utility

12Cited by

4References

3Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Lothar Diehl · Stuttgart, DE
Alexander Bareiss · Immenstadt im Allgäu, DE

Key dates

Filing date	Oct 5, 1999
Grant date	Jul 31, 2001
Priority date	—
Expiry date	Oct 5, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4175
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

In a method for testing a measuring sensor for the determination of an oxygen concentration in a gas mixture, the measuring sensor supplies a detection voltage furnished by a Nernst measuring cell and corresponding to the oxygen concentration. The detection voltage is evaluated by a circuit arrangement and is picked off between a first electrode exposed to the gas mixture and a second electrode exposed to a reference gas. The measuring sensor is heated to operating temperature. The Nernst measuring cell is exposed to a constant test voltage and a gas mixture with a well-defined oxygen concentration and a measuring current of the Nernst measuring cell is evaluated.

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