RANDOM-ACCESS PRESSURE MULTIPLEXER VALVING ARRANGEMENT AND SYSTEM

The present invention relates to a unique multiple-sampling valve and system to provide a random-addressable time-division multiplex arrangement for pressure measurements which makes it more compatible with computer process control. A single pressure to electrical signal transducer forms one side of a common predetermined volume chamber and responds to pressure signals channeled to the chamber as a result of selective actuation from a plurality of sample ports wherein open connections may be established in random order or by predetermined sequence for measurements in the sample mode. A plurality of individual (energizeable linear solenoid) valve rods, disposed in proximity with the predetermined volume, minimizes the common volume and length of passageway between the valve rods and the transducer, substantially eliminating restrictions therebetween, thus decreasing the time required for the transducer to respond to one pressure signal from any given port. A second (and/or third) position of the valve rods serves to connect high-pressure fluid to all conduits sequentially (one at a time) for the diagnostic mode; and, simultaneously for the purging mode. Logical controls select the connections to be established, modes of operation, and analyze output conditions for locating any restrictions to determine sources of error.