Remote signal conditioner for a Coriolis flowmeter

  • US 6,487,507 B1
  • Filed: 10/15/1999
  • Issued: 11/26/2002
  • Est. Priority Date: 10/15/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. Meter electronics for a Coriolis flowmeter capable of being intrinsically safe, said meter electronics comprising:

  • a signal conditioner that receives power from a power supply in a host system remote from said signal conditioner via a first wire and a second wire;

    drive circuitry in said signal conditioner that generates a drive signal from said power received from said power supply and applies said drive signal to a driver affixed to at least one conduit;

    pick-off signal conditioning circuitry in said signal conditioner that receives input signals from a first pick-off sensor and a second pick-off sensor affixed to said at least one conduit, generates information indicating properties of a material flowing through said conduit from said input signals, and transmits output signals containing said information to said host system;

    host-side protection circuitry in said signal conditioner that prevents power in excess of an intrinsically safe threshold from being applied by circuitry in said signal conditioner to wires connecting said signal conditioner to said host system; and

    flowmeter assembly protection circuitry in said signal conditioner that prevents power in excess of said intrinsically safe threshold from being applied by circuitry in said signal conditioner to wires connecting said signal conditioner to said driver, said first pick-off sensor, and said second pick-off sensor.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×