Reusable test unit for simulating electrochemical sensor signals

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

1990-07-23

1992-06-23

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Calibration

324439, 422 61, 422 62, 73 1R, 73 4R, G01C 2500, G01R 2702

Patent

active

051246619

ABSTRACT:
A reusable test unit is disclosed for testing the functionality of a portable blood analyzer, and particularly the interface between the high-impedance electrochemical sensors and the instrument. Signals are generated to simulate amperometric, conductimetric, and potentiometric sensors. Circuitry permits detection and discrimination between failures from damaged CMOS amplifiers and failures from leakage currents 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 a circuit board is disclosed for guarding against coupling between closely space traces and connector pads.

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