用恒流法自制仪器精确测定液体的黏度

介绍了用恒流法自制仪器精确测定液体的黏度.该自制仪器,能有效地保证底部的密封性、液体水位恒定和可操作性.另外,还增设一个玻璃管连通器,并附加一根标尺和游标,可使液体水位的测量精确度提高.在接毛细管输出液体的量筒处加上光电计时,可使测量液体的流速的精确度提高.再将相关数据送入已编好程序的电子仪器进行计算并显示出黏度.另外该仪器可调换不同管径的毛细管,因此应用本方法能快速准确地测量多种液体的黏度.

Accurately determining the viscosity coefficient of liquid by the flow rate method with a self-made instrument

This paper introduces a self-made instrument,which is used to accurately determine the viscosity coefficient of liquid by the flow rate method.Our self-made measuring instrument could ensure effectively the product with a good leak-proof quality on the bottom board and the operability to control the height of the liquid keep with the steady flow.Moreover,we additionally build a glass joint implement,and attach a scale and vernier,which improves the accuracy of measurement.With the photoelectric timing at the graduated cylinder connected with the capillary tube,the flow measurement accuracy is greatly improved.Then,the relevant data into the procedures have been calculated properly and electronic devices demonstrate viscosity.In addition,another design can be swapped for different diametric capillary tubes.Consequently,this method can be applied quickly and accurately to determine a variety of liquid viscosities.