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Pressure sensor disconnect detection for a blood treatment device

  • US 7,886,611 B2
  • Filed: 01/15/2010
  • Issued: 02/15/2011
  • Est. Priority Date: 04/13/2001
  • Status: Expired due to Fees
First Claim
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1. A system for detecting an electrical sensor circuit comprising:

  • a sensor signal processing circuit further comprising an input port, a signal line connecting the input port to the processing circuit, a pull-up resistor connected between the input port and a predetermined voltage, wherein said signal line is connected to an amplifier;

    a sensor circuit comprising a connector adapted to connect to the connector, wherein the sensor circuit has a resistance substantially less than the pull-up resistor, andwherein the sensor signal processing circuit detects an unconnected sensor based on the amplification of the voltage being outside a preset limit.

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