Black R A, How T V, Whittington R B
Institute of Medical and Dental Bioengineering, University of Liverpool, England.
Biorheology. 1986;23(5):485-98. doi: 10.3233/bir-1986-23505.
The Authors have looked at six proprietary rotational viscometers. It was not practicable to examine them all in the same detail, but the information suffices to show how results of reasonable accuracy may be obtained from any of them. Tests on Newtonian liquids show that these instruments have calibration-factors which are essentially functions of the shear-rate to which the calibrant is subjected. In some cases, the calibration factor is also strongly dependent upon the viscosity of the calibrant itself. However, it is shown that all of these instruments can yield results on Newtonian liquids with an accuracy of about +/- 3%, but only at rates of shear involving sufficiently high torques. Having looked at the different responses of these individual instruments, the Authors recommend that users should calibrate their own instruments against a range of Newtonian liquids. The accuracies mentioned above are, of course, for Newtonian liquids; and when the viscometer is used in blood-studies, adoption of a wider error-band may be necessary.
作者们研究了六种专利旋转粘度计。对所有粘度计进行同样详细的检查并不实际，但所获信息足以表明从其中任何一种都可以得到具有合理准确度的结果。对牛顿流体的测试表明，这些仪器具有校准系数，校准系数本质上是校准剂所受剪切速率的函数。在某些情况下，校准系数还强烈依赖于校准剂本身的粘度。然而，结果表明，所有这些仪器在牛顿流体上都能以约±3%的准确度得出结果，但前提是剪切速率要达到足够高的扭矩。在研究了这些单独仪器的不同响应之后，作者们建议用户应使用一系列牛顿流体对自己的仪器进行校准。当然，上述准确度是针对牛顿流体而言的；当粘度计用于血液研究时，可能需要采用更宽的误差范围。
