Plate - cone - viscometer with viskositaetsabhaengiger shear rates control

摘要

For sequential measurement of dynamic viscosity, a plate-cone viscometer with viscosity-dependent regulation of the shear rates has been developed, wherein during measurement the drive motor 4 for the measuring cone 3 is controlled by the output signal from an analog computer 7 included in a regulating circuit, this component linking the electrical signals for the torque UM and speed UN continuously and in weighted manner. Moreover, the measuring cone is brought into an optimum position relative to the plate 1 by means of a motor-driven micrometer spindle under microprocessor control for each measurement, the measuring position being signalled by electrical contact. Using the method of operation according to the invention it is possible to obtain direct compatibility with other viscosity measuring systems. e.g. the outflow cup according to DIN 535211. IMAGE