| 摘要 |
PROBLEM TO BE SOLVED: To prevent air suction and to reduce the suction remaining quantity, to change the ascent speed of a nozzle chip according to the amount of discharge, and to reduce specimen fluid ball takeout, and leakage in the nozzle chip by varying the descent speed of the nozzle chip according to the amount of suction and following a liquid level in an automatic analyzer for performing qualitative-quantitative analysis of a biological sample, such as blood and urine. SOLUTION: The amount of suction/discharge of a specimen in the nozzle chip is successively calculated from suction/discharge pressure and the amount of volume change in a dispensing head space, and a liquid level position is calculated from the shape of the nozzle chip and that of a specimen vessel and from the amount of suction/discharge calculated from the amount of pressure/volume change. The descent/ascent speeds of the nozzle chip are varied so that the nozzle chip follows the travel of the liquid level position obtained by the calculation. COPYRIGHT: (C)2010,JPO&INPIT |
