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Apparatus for configuring a remote process sensor and signal transmitter

  • US 5,083,288 A
  • Filed: 12/24/1990
  • Issued: 01/21/1992
  • Est. Priority Date: 02/24/1989
  • Status: Expired due to Fees
First Claim
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1. A remote signal sensor and transmitter and means for configuring parameters therein comprisinga multiplexer circuit having a plurality of input terminals and an output terminal,a remote sensor connected to selected input terminals of said multiplexer,an analog-to-digital (A/D) converter having an input and an output, the input being connected to the output of said multiplexer,a microprocessor having first second and third input terminals, and an output terminal,the output of said A/D converter being connected to said third input terminal of said microprocessor,said microprocessor having an associated random access memory (RAM) for temporary storage of data, an electrically programmable read only memory (EPROM) for storing a program and an electrically erasable read only memory (EEPROM) for the storage of data used for configuring parameters in said signal sensor and transmitter,a source of potential connectable by an operator by a first lead to said first input terminal on said microprocessor to provide said potential on said first terminal,said source of potential connectable by said operator by a second lead to said second input terminal on said microprocessor to provide said potential on said second terminal,said first and second leads connected through identical resistors to a positive power supply which is normally applied to said first and second terminals on said microprocessor,said microprocessor having said output terminal connected to a load circuit having output terminals,output load terminals connected to said load circuit,a circuit connected across said output load terminals including a low voltage positive power supply in series with an ammeter, anda software program in said EPROM circuit including (1) a first series of steps each related to a specific portion of said sensor and transmitter and (2) a second series of steps each representing a parameter related to a step in said first series, said microprocessor sequencing through said first series of steps of said software program as said potential is applied to said first terminal of said microprocessor and then to an associated step in said second series of steps as said potential is applied to said second terminal of said microprocessor,each transition of said microprocessor to a step in said first series of steps selecting a portion of said signal sensor and transmitter to be configured and each transition of said microprocessor to the associated step in said second series of steps configuring in said sensor and transmitter a specific parameter related to said selected portion of said sensor and transmitter,the value of each configured parameter selected from a step in said second series of steps being stored in said EEPROM and thus comprising a parameter configured in said signal sensor and transmitter.

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