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Process variable transmitter having a non-interacting operating range adjustment

  • US 4,494,183 A
  • Filed: 06/17/1982
  • Issued: 01/15/1985
  • Est. Priority Date: 06/17/1982
  • Status: Expired due to Term
First Claim
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1. A process variable transmitter comprisinga process variable input for connection to a source of a signal representative of a process variable,a computing means connected to said input for producing a transmitter output representing a desired lower range value of said process variable and a desired upper range value of said process variable,a set-lower-range value control means for controlling said computing means to produce a lower range value transmitter output at a first value of said process variable anda set-upper-range value control means for controlling said computing means to produce an upper range value transmitter output at a second value of said process variable by calculating the difference between the upper-range value and the lower-range value.

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