| 摘要 |
FIELD: means for clinical laboratory investigations. SUBSTANCE: analyzer has glass cylindrical pipette containing working part with blood sample positioned vertically between spacers in stand, photoelectric unit with source of electromagnetic radiation and photodetector placed in opposition one another on diameter of pipette in its working part, system measuring and processing signals of photodetector. Specific feature of given analyzer lies in that it has support with horizontal shelf located at fixed height from base of support and possessing through slit whose width exceeds diameter of pipette, two springy holders anchored under horizontal shelf one above another with possibility of simultaneous vertical location of pipette in these holders and in slit. Radiation source and photodetector are mounted on upper surface of horizontal shelf on opposite sides of slit so that working part of pipette can be positioned between them. Photodetector comes in the form of two valve photocells placed in vertical plane one above another, system measuring and processing signals of photodetector has in addition two electronic amplifiers, two voltmeters, differential amplifier, storage, controllable master unit, comparator and electronic time counter. Inputs of electronic amplifiers are connected to outputs of upper and lower photocells and their outputs are coupled to voltmeters. Output of amplifier of lower photocell is also connected to first input of differential amplifier and through toggle switch to storage whose output is connected to second input of differential amplifier and to input of controllable master unit. Outputs of differential amplifier and of controllable master unit are connected to comparator and output of the later is coupled to switching-off input of electronic time counter. EFFECT: raised reliability of proximity analysis of rate of erythrocytes settling. 5 dwg, 1 tbl |
