Title: Automated calibration and standardization apparatus

Abstract: New and improved apparatus is provided for the calibration and standardization of the analog output signal level of automated analysis equipment, which level varies as a function of the concentration of the constituent being analyzed. Such apparatus comprises an A/D converter including a dual-slope integrator for translating the output signal level to a time interval which varies as a function of the constituent. Such apparatus further includes means for generating the inverse function of the analytical function, which is applied to linearize and scale the output signal level and to convert such level directly to digital form. Also, provision is made for the calibration and standardization, on an individual basis, of each of a plurality of analytical channels in a multi-channel system.

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Inventors: Mader, Arthur H. (Mount Vernon, NY, US)
Gasiunas, Donatas V. (Carmel, NY, US)
Stark, Edward W. (Garden City, NY, US)

Application Number: 484027
Filing Date: 1974-06-28
Publication_date: 1976-08-17
Assignee: Technicon Instruments Corporation (Tarrytown, NY)
Primary Class(es): 341/140 73/1.02, 73/61.58, 341/167, 356/435
Other Classes:
US Patent Ref:

3241432	Mar, 1966	Skeggs et al.	356/179.
3349390	Oct, 1967	Glassman	340/347.
3568181	Mar, 1971	Weaver	340/347.
3662163	May, 1972	Miller et al.	235/197.
3681577	Aug, 1972	Gasiunas	235/151.
3685048	Aug, 1972	Pincus	340/347.
3686665	Aug, 1972	Elias et al.	340/347.
3701145	Oct, 1972	Bergin	340/347.
3824585	Jul, 1974	Meijer	340/347.

Other Refs:
Primary Examiner: Sloyan, Thomas J.
Assistant Examiner:
Attorney: Tedesco; S. P., Rockwell; Stephen E.