Abstract: A method for fills and/or cleans the measurement cell of a measuring instrument, namely a viscometer and/or density measuring instrument, in particular of a rotational viscometer. A sample is introduced via a sample line into the measurement cell by a pump, and wherein a dynamic viscosity and/or density of the sample is determined in the measurement cell. A funnel-shaped, reversibly openable receiving container, in particular a filling funnel, for the sample, is arranged in the sample line, between the pump and the measurement cell. The receiving container is opened and the sample is introduced into the receiving container. The receiving container is connected to the pump via a pressure line in such a way that, when pressure is applied into the receiving container, a proportion of the sample is dispensed out of the receiving container and introduced into the measurement cell.

Abstract: A rotational viscometer for measuring a viscosity of substances contains a measuring shaft and a hollow shaft which is driven by a drive. The measuring shaft is arranged within the hollow shaft. A measuring body is arranged at one end of the measuring shaft and can be supplied with a sample. A coupling element is provided for connecting the hollow shaft to the measuring shaft. An angle measuring unit is arranged relative to the measuring shaft such that an angular difference and/or a rotational phase difference between the hollow shaft and the measuring shaft can be measured. The hollow shaft and the measuring shaft end opposite the measuring body and protrude into a housing. The coupling element is arranged in the housing, and the housing and the coupling element are connected to the measuring shaft and to the hollow shaft such that the housing is removable from the rotational viscometer.

Abstract: A rotational viscometer for measuring a viscosity of substances contains a measuring shaft and a hollow shaft which is driven by a drive. The measuring shaft is arranged within the hollow shaft. A measuring body is arranged at one end of the measuring shaft and can be supplied with a sample. A coupling element is provided for connecting the hollow shaft to the measuring shaft. An angle measuring unit is arranged relative to the measuring shaft such that an angular difference and/or a rotational phase difference between the hollow shaft and the measuring shaft can be measured. The hollow shaft and the measuring shaft end opposite the measuring body and protrude into a housing. The coupling element is arranged in the housing, and the housing and the coupling element are connected to the measuring shaft and to the hollow shaft such that the housing is removable from the rotational viscometer.