The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 1987
Filed:
Oct. 12, 1982
Jorg Diskowski, Freiburg, DE;
Wolfgang Jeppel, Umkirch, DE;
Hartmut Moisel, Kirchzarten-Burg, DE;
Hans P Spiess, Umkirch, DE;
Hellige GmbH, Freiburg, DE;
Abstract
The method and the device based on it for the automatic calibration of measuring and indicating appliances used for the measurement and indication of the oxygen partial pressure in connection with polarographic sensors provide that a variable polarization voltage supplied by a polarization voltage generator (2), controlled by a central processor (4), is applied to a polarographic sensor (1). The resulting measuring signals of the sensor (1), after analog-digital conversion, are stored in a read-write memory (8). By comparing these with the desired current values stored in a read-only memory (7) the central processor (4) determines the theoretical residual current deviation from the zero value, which in turn is stored. The operating point is fixed at the point of the lowest slope within the operating range of the characteristic line. The theoretical value of the oxygen partial pressure is extrapolated to 100% relative humidity for the chosen sensor temperature with the aid of a signal proportional to the air pressure. The automatic calibration completely relieves the appliance user of the tedious and time-consuming calibration procedure.