Chemical analyzer with automatic calibration
US3960497A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1975 |
| Grant date | Jun 1, 1976 |
| Priority date | — |
| Expiry date | Aug 19, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/115831
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Improved apparatus for automatically calibrating and verifying the calibration of a chemical analyzer of the type which determines the concentration of a component in chemical or biological samples, e.g. concentration of glucose in blood or urine, wherein a sample changer sequentially advances samples into position for analysis. Calibration of the analyzer is performed by measuring a calibration standard of known concentration and generating a conversion factor therefor which converts the measured value of the standard to the known value thereof. Means is provided for storing conversion factors and proper calibration of the analyzer is verified by comparing successive conversion factors. If the compared conversion factors differ by more than a predetermined amount, the sample changer is halted and the calibration standard is remeasured. Measurement of the calibration standard is repeated until either two successive calibration factors are generated which differ by less than the predetermined amount, or until a predetermined number of unsuccessful measurements are made at which time the analyzer is stopped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.