Abstract: A determination of optimal energy insertion, or input, results from a measurement of opacity at various heights in a fluid coagulating system and at the same time from measuring a deviation width of the opacity at a lower measuring point. Simultaneously, a continuous comparison takes place of the opacity measured at the various measuring points, which changes with time, and a comparison of the deviation width of opacity. The optimal energy insertion in the fluid coagulating system is achieved if, at each point in time, the opacity at all measuring points is maintained approximately the same and the deviation width of the opacity is maintained at or near a maximum.

Abstract: A capillary viscometer apparatus comprises a measuring cylinder (3) having an axially-movable piston (2) which is moved by a drive (1). The measuring cylinder (3) and the piston (2) define a measuring space (4) which communicates with a capillary tube or bundle (6) and a differential pressure gauge (7). A pressure difference between the measuring space (4) and a tested medium (12) is registered and processed by a signal-processing unit (9). A speed of the piston (2) is determined by means of a displacement-time measuring device or a speed measuring device (8) and this information is then transmitted to the signal-processing unit (9).