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The sample is filled into a container with oscillation capacity. The eigenfrequency of this container is influenced by the sample's mass. This container with oscillation capacity is a hollow, U-shaped glass tube (oscillating U-tube) which is electronically excited into undamped oscillation. The two branches of the U-shaped oscillator function ...
Anton Paar ProveTec, formerly known as Petrotest GmbH, is a German company within the Anton Paar group that is known for its laboratory equipment for the chemical and petrochemical industries. Furthermore, Anton Paar ProveTec is manufacturing measurement instruments for the cosmetics industry, the aroma and fragrance industry, the food, and ...
A calibration first consists of a preliminary test in which the fundamental calibration capability is checked. The quartz control plates must meet the required minimum requirements with respect to their dimensions, optical pureness, flatness, parallelism of the faces and optical axis errors.
Anton Paar GmbH is an Austrian company based in Graz that develops, produces and sells analytical instruments for laboratories and process analytical technology. The company operates globally, with subsidiaries in 39 countries. [ 1 ]
Different implementations of cross-correlation light scattering have been developed and applied. Currently, the most widely used scheme is the so-called 3D-dynamic light scattering method,. [10] [11] The same method can also be used to correct dynamic light scattering data for multiple scattering contributions. [12]
The calibration can be done using a fluid of known properties. Most commercial units are provided with a conversion factor. The time required for the test liquid to flow through a capillary of a known diameter of a certain factor between two marked points is measured.
The formal definition of calibration by the International Bureau of Weights and Measures (BIPM) is the following: "Operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties (of the calibrated instrument or ...
The stress acting in the sample is determined directly from the torque generated in the motor, which is required to deform the sample. Deflection angle/strain and shear rate are determined by the use of an optical encoder. Single-motor rheometers allow characterization of samples in either strain/shear rate or shear stress-controlled tests