Test apparatus for process computer interface instrumentation
Abstract
Abstract A CONTROL LOOP INTERFACE BETWEEN A DIGITAL COMPUTER AND A PNEUMATICALLY OPERATED REGULATOR FOR AN INDUSTRIAL PROCESS VARIABLE INCLUDES VARIOUS CONVERTERS IN THE COMPUTER OUTPUT AND FEEDBACK CIRCUITS AND THE PNEUMATIC PIPING. CUTOFF VALVES AND MANOMETER CONNECTIONS ARE PROVIDED IN THE PIPING BETWEEN EACH CONVERTER AND THE REGULATOR, AND CONNECTORS ARE PROVIDED IN THE COMPUTER OUTPUT AND FEEDBACK WIRING SO THAT EACH INSTRUMENT MAY BE ISOLATED FROM THE SYSTEM, WHILE COINCIDENTALLY LOCKING THE REGULATOR IN THE OPENING CONDITION OF THE MOMENT. SUITABLE TEST INSTRUMENTATION IS THEN APPLIED TO THE CONNECTORS FOR INDICATING THE OPERATION OF THE PARTICULAR SEGREGATED INSTRUMENT. PREFERABLY, THE VARIOUS PNEUMATIC COUPLINGS, ELECTRICAL CONNECTORS, AND VALVE ACTUATORS ARE PROVIDED ON A CONVENIENTLY LOCATED TEST PANEL. WHERE A MULTIPLICITY OF VARIABLES ARE COMPUTER CONTROLLED, AS IS USUALLY THE CASE, ALL OF THE TEST PANELS WILL BE CONVENIENTLY GROUPED SO THAT A RELATIVELY UNSKILLED WORKMAN CAN TEST ALL OF THE INTERFACE INSTRUMENTS IN A RELATIVELY SHORT TIME.
Inventors
- 👤 George D Beauchamp
- 👤 James M Ware
Bibliographic Details
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