Automatic chemical analyzer

  • US 4,678,755 A
  • Filed: 07/29/1985
  • Issued: 07/07/1987
  • Est. Priority Date: 07/30/1984
  • Status: Expired due to Term
First Claim
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1. In an automatic chemical analyzer having means for containing a sample to be analyzed, means for forming a reaction solution comprised of a mixture of the sample and a reagent corresponding to an analysis item, and means for analyzing the analysis item in the above mixture and wherein an output is provided in response to a quantitative analysis result obtained by comparing a measured reaction of said solution to a calibration curve corresponding to a respective analysis item, the improvement of:

  • means for storing the identity of a plurality of analysis items;

    means for storing data indicating the time of a previous calibration of the calibration curve for each of the identified analysis items;

    means for storing data corresponding to a predetermined time interval following the calibration of each calibration curve, said time interval corresponding to the time from a previous calibration that the calibration curve can be reliably substantially effective for analysis;

    control means including counting means for checking periodically the time interval remaining for each previous calibration of the calibration curve for a respective analysis item; and

    means governed by said counting means for outputting data representative of the reliability of each checked calibration curve.

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