Deltatrak Inc.

Richard L Foreman

Frederick L Wu

A system for obtaining environmental data such as temperature, pressure, humidity, and the like which utilizes a data acquisition sensor. In the case of obtaining temperature data, the sensor may be in the form of a thermistor which measures a particular temperature value and generates a signal representing the same. A microprocessing unit receives the signal from the data acquisition device and sends the same to an erasable memory unit. A data collection computer receives the value signal directly from the erasable memory unit, since access to the erasable memory unit by the microprocessor is shielded. The data collection computer can communicate directly with the erasable memory without the need for generating a prior art RS-232 protocol.

Environmental data logging system

A monitor device for determining end point measurements of an environmental parameter such as temperature, humidity and the like. The monitor employs a probe which consecutively measures consecutive values of such environmental parameter. Transducing means converts the measured values into an electrical signal. Clock means determines a time window which is stored in memory means. Memory means obtains a value of the span of the parameter value by determining the difference between an initial value and a selected subsequent value of the parameter. End point selection means compares the selected minimum ratio with the actual ratio within the time window set by the clock means. When the actual ratio lies within the preset minimum ratio, display means exhibits indicia representing the actual environmental parameter.

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Santee, CA, United States of America

Richard L Foreman