PROCESS VARIABLE TRANSMITTER HAVING A NON-INTERACTING OPERATING RANGE ADJUSTMENT

摘要

APPLICATION OFSTEPHEN J. BAYER AND ARTHUR M. OLSENPROCESS VARIABLE TRANSMITTER HAVING ANON-INTERACTING OPERATING HAVING ADJUSTMENTABSTRACTThe operating range for a process variable transmitterused as a pressure transmitter is selectivelynon-interactively adjusted by successively applying upperand lower range values (URV and LRV) of input pressure toproduce an LRV output signal and calculating the URV andthe Span which is equal to the difference between theupper and lower range values, i.e., URV-LRV, to produceoutputs from the transmitter represent-ing the new upper and lower range values corresponding tothe calculated Span.