Calibration in an automatic chemical testing apparatus
US4043756A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1976 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Dec 29, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/113332
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an automatic chemical testing apparatus calibration values obtained from readout signals of analysis means must be stored for use in prior art calculating means for processing of subsequent readout signals of samples containing unknown quantities of substances in a medium. Improved means are provided for selecting the calibration values, namely a blank value and a reference value. A plurality of pairs of blank and reference samples are processed. The blank samples have known zero or baseline levels or concentrations of substances, and the reference samples have known concentration levels of each substance. These known values are stored for comparison to processed values obtained by processing the readout signals obtained in response to analysis of the blank and reference samples. The validity of each such readout signal as a calibration value is determined by the successfulness of the comparison. The most current successful blank and reference signals are selected as the calibration values. For verifying validity, the selected calibration values are utilized for processing signals obtained from a calibration control sample for which known substance concentration values are store…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.