Signet Scientific Company

Ronald John Yates

Gert Burkhardt

Frederic Dent Hook

Martin M Munzer

Craig Stephen Trommler

Albert Hai Zhou

A method of identifying a plurality of slave processors using a master processor is provided which includes assigning a unique identification code to each of the plurality of slave processors, and transmitting an attention command from the master processor to the plurality of slave processors. The master processor then transmits a request for the slaves' unique identification code to the plurality of slave processors. The master processor then determines whether one of the plurality of slave processors unique identification code matches the classification characters. If there are no matches, a last added classification character is incremented by 1. If only one matches, the master processor identifies the one of the plurality of slave processors, and removes a last added classification character. Otherwise, if more than one matches, the master processor adds a new classification character, and sets a last added classification character to a minimum identification code character value.

Method for identifying and communicating with a plurality of slaves in a master-slave system

A liquid conductivity measurement system is disclosed that accurately measures a liquid's conductivity over a range spanning at least several orders of magnitude using just a single sensor, but minimizing the adverse effects of capacitive and other non-linear factors on the conductivity measurement. The system includes a sensor having two spaced-apart electrodes immersed in the liquid and a drive signal source that applies to the sensor an ac electrical signal having a selected frequency and predetermined magnitude. A voltage detector monitors a sensor voltage signal across the sensor's two electrodes and produces a measurement of the liquid's conductivity. The drive signal source is configured to iteratively adjust the frequency of the ac electrical signal based on the sensor voltage signal, to optimize the liquid's conductivity measurement.

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Long Beach, CA, United States of America

Ronald John Yates