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:
Jul. 17, 1984
Filed:
Jul. 16, 1981
Irwin H Krull, Santa Clara, CA (US);
James G Tisue, Los Altos, CA (US);
Other;
Abstract
The circuitry forms part of testing apparatus for measuring the concentration of ions in fluids, primarily body fluids, including the measurement of chlorides, ionized calcium, sodium and potassium as well as other ions. A small sample fluid is subjected to a controlled mechanical oscillation to thoroughly expose a true representative sample to the electrode for measurement. The apparatus has a digital readout display and two associated switches for calibrating the circuitry with high and low standard fluids. The low standard circuit is calibrated with the low standard sample to establish offset correction while the high standard circuit is calibrated with the high standard sample to establish gain correction. After the instrument has been adjusted for proper low and high standard values, for a particular electrode, the offset correction and gain correction parameters are established so that electrode input values cause proper concentrations to be displayed.