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Multiple thermocouple testing device

  • US 4,571,689 A
  • Filed: 10/20/1982
  • Issued: 02/18/1986
  • Est. Priority Date: 10/20/1982
  • Status: Expired due to Fees
First Claim
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1. A multiple thermocouple testing device for determining electrical short and open circuits in a thermocouple system, said thermocouple system having a plurality of probes, each of said probes having a first thermocouple and a second thermocouple, said second thermocouples of said probes are connected in a plurality of parallel groups, said multiple thermocouple testing device comprisinga computer programmed to:

  • read test values, compare test values to defined constants, direct current to a selected first thermocouple, output results of the comparison, check test values for noise, and control functioning of said multiple thermocouple testing device, said computer starting upon a given command, and returning to start upon being reset;

    means for providing direct current voltages to said computer;

    means for selectively applying a direct current voltage to said selected first thermocouple of said thermocouple system, said direct current voltage being input to said means for selectively applying by said means for providing direct current voltages;

    means for interfacing, said means for interfacing receiving a plurality of direct current voltages from said means for providing direct current voltages for powering said means for interfacing, said means for interfacing connected to said computer for inputting data thereto and receiving data therefrom, said means for interfacing outputting control signals to said means for selectively applying a direct current voltage to said thermocouple system, and said means for interfacing connected to receive analog signals from said thermocouple system and digitizing said signals; and

    means for displaying said output results, said means for displaying connected to said means for interfacing.

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