Designation: D – 99Standard Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational (Brookﬁeld t. ASTM De1. Standard Test Methods for Rheological Properties of Non- Newtonian Materials by Rotational Viscometer. standard by. ASTM D Standard Test Methods for Rheological Properties of Non- Newtonian Materials by Rotational Viscometer.
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Each viscometer model comes with a number of different measuring spindles. Sample Typical sample volume for manual operation: Historical Version s – view atsm versions of standard. In addition, there are special sample adapters available for reducing the required sample volume, for extending the measuring range and for a wider temperature range. Temperature control Rotational viscometers that test typically dd2196 of sample in an open beaker are in most cases operated without temperature control.
For systems that use a spring for measuring the torque, there are different models designed for different viscosity ranges.
With Test Methods B and C, the extent of shear thinning is indicated by the drop in viscosity with increasing viscometer speed. Rotational viscometers are the widest spread viscometers on the market and can be found in more or less all industries independent of company size.
The resulting wide gap between the bob and the vessel’s wall is assumed to be infinite.
The degree of thixotropy is indicated by comparison of viscosities at increasing and decreasing viscometer speeds Test Method Bviscosity recovery Test Method Bor viscosities before and after high shear combination of Test Methods B and C. The viscosity calculation is based on this assumption.
Learn more about the Rotational Principle. Historical Version s – view previous versions of standard Translated Version s: The high-shear treatment in Test Method C approximates shearing during paint application. Test Method A is used for determining the apparent viscosity at a given rotational speed, although viscosities at two or more speeds give better characterization of a non-Newtonian material than does a single viscosity measurement.
The viscosity behavior measured after high shear is indicative of the characteristics of the paint soon after application.
Viscosity measuring range – for a model for medium viscosity materials, with several different spindles: Density Redefined Anton Paar has once again redefined digital density measurement with the groundbreaking invention of a new measuring principle: The values given in parentheses are for information only. One spindle is suitable only for a part of the model’s measuring range.
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The easy filling of a simple sample container and the fast and easy exchange of the measuring bob make rotary viscometers the most versatile instruments, giving good results aetm various applications.
Dynamic viscosity Learn more about the Rotational Principle. The values given in parentheses are for information only. The degree of thixotropy is indicated by comparison of viscosities at increasing and decreasing rotational speeds Test Method Bviscosity recovery Test Method Bor viscosities before and after high aastm combination of Test Methods B and C.
Rotational Viscometer / infinite-gap geometry :: Anton Paar Wiki
The listed specifications apply to a typical instrument with spring mechanics and a classic cylinder or disc spindle in a large sample vessel. Tests are performed at ambient temperature. Rotational viscometers that test typically mL of sample in an open beaker are in most cases operated without temperature control. Still, thermostat baths are ashm that can hold even a mL beaker. The high-shear treatment in Test Method C approximates shearing during paint application. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Standards and Norms A great number of standards is available for rotational viscometers, among them for example: