Reusable test unit for simulating electrochemical sensor...

Details Reusable test unit for simulating electrochemical sensor... Reusable test unit for simulating electrochemical sensor...

G - Physics

01

N

G01N 27/06 (2006.01) G01N 27/416 (2006.01) G01N 33/487 (2006.01) G01R 31/28 (2006.01)

Patent

CA 2087966

A reusable test unit (510) is disclosed for testing the functionality of a portable blood ana- lyzer, and particularly the interface between the high-impedance electrochemical sensors and the instrument. Signals are generated to simulate am- perometric, conductimetric, and potentiometric (401) sensors. Circuitry permits detection and dis- crimination between failures from damaged CMOS amplifiers (303) and failures from leakage currents (313) in contaminated connectors. The test unit may be configured to be insertable into the instrument to fit mechanically in the same fashion as a disposable sensor device. A scheme for three-dimensional routing of guard lines on circuit board (850) is disclosed for guarding against coupling between closely spaced traces and connector pads.

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