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:
Nov. 22, 2011
Filed:
Aug. 17, 2007
Applicants:
Behzad Rezvani, Anaheim, CA (US);
Jeffrey Lomibao, Corona, CA (US);
Chang-dong Feng, Long Beach, CA (US);
Inventors:
Behzad Rezvani, Anaheim, CA (US);
Jeffrey Lomibao, Corona, CA (US);
Chang-Dong Feng, Long Beach, CA (US);
Assignee:
Rosemount Analytical Inc., Irvine, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N 27/416 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of measuring impedance of a pH electrode is provided. A test current is applied to the pH electrode for a time duration that is less than 50 percent of a time constant that is associated with electrical characteristics of the pH electrode. A voltage response of the pH electrode is measured when the test current is applied to the pH electrode. An impedance of the pH electrode is calculated as a function of the voltage response.