Universal Dynamic Spectrometer (Physica UDS 200 pair)

The universal rheometer is used to measure rheological parameters, such as the (apparent) dynamic viscosity of Newtonian and non-Newtonian substances as a function of shear rate and temperature.

The substance to be measured is either in an annular gap between two coaxial cylinders or in a (wedge) gap between a plate and a cone/plate. The outer cylinder or plate is stationary while the inner cylinder or cone/plate is driven. The shear rate can be adjusted very precisely. It evokes a flow resistance in the substance, which is a measure of the dynamic viscosity and is recorded by a high-precision torque transducer. Rotational viscometers can also be used for medium- to high-viscosity (> 3 m Pa*s) and structurally viscous substances.
The devices available at the KTM are PC-controlled and allow the parameters shear rate and temperature to be changed dynamically during the test run. In addition, complex measurements such as amplitude sweeps to determine the storage and loss modulus are possible. The software enables the exact evaluation of the measurement results after the test run with the help of mathematical models and diverse graphical representations.
Parameter
Torque range 10 to 100,000 m Pa*s
Temperature range -30 ° to 150 °C
Frequency range 10- 4 up to 100 Hz
Shear stress range 10- 3 to 10 5 Pa
Shear rate range 10-6 to105 s-1
Temperature -180 to 600 °C
Viscosity range 0.5*103 to 8.5*108 Pa*s
Standard tests
  • DIN 53017: Determination of the temperature coefficient of viscosity of liquids
  • DIN 53019: Viscometry – Measurement of viscosities and flow curves with rotational viscometers (replaces DIN 53018 and DIN 1342)
  • DIN 51810: Testing of lubricants – Determination of shear viscosity of greases using the rotational viscometer – Part 1: Measuring system cone/plate
  • DIN 51810: Testing of lubricants – Testing of rheological properties of lubricating greases – Part 2: Determination of yield point with the oscillating rheometer and the plate/plate measuring system