Electronic battery tester

  • US 6,310,481 B2
  • Filed: 03/26/1999
  • Issued: 10/30/2001
  • Est. Priority Date: 01/13/1997
  • Status: Expired due to Term
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First Claim
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1. An apparatus for measuring condition of a storage battery, comprising:

  • a first connector adapted to connect to a positive terminal of the storage battery;

    a second connector adapted to connect to a negative terminal of the battery;

    an analog to digital converter coupled to the first and second connectors adapted to amplify a signal from the battery developed between the positive terminal of the battery and the negative terminal of the battery and responsively provide a digital output;

    a memory storing a calibration value, the calibration value related to lumped sum non-linearities in the apparatus; and

    a microprocessor coupled to the analog to digital converter adapted to measure condition of the storage battery in response to the digital output, and wherein the measurement is a function of the calibration value whereby the calibration value is used to reduce offsets in the measurement due to lumped sum non-linearities.

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