Standard Benchtop Viscometer Reorganization
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Posted On :
Jan-09-2012
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Article Word Count :
521
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Software update closes the gap between the type of research rheometers, viscometers and standard benchtop.
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Software update closes the gap between the type of research rheometers, viscometers and standard benchtop.
Many development projects focused on new or improved materials needed for making the flow behavior in the proper performance of the product. Examples include, greases, lubricants, engines, and thickening agents in food. Companies that produce these liquids and semi-solid, extensive tests the behavior of traffic flow of the initial determination of the yield curve profiling and recovery after use. The detailed methods that can be quantified and related material parameters of the viscosity requirement has caused a number of expensive research rheometers with the extensive capabilities. The disadvantage, however, not only price, but also the time needed to properly train the operators.
Recent breakthrough in the use of software to control a standard benchtop viscometers, has created more companies to provide some high-class research capacity characteristic type of rheometers. New software, developed an algorithm, Brookfield Engineering, Middleboro, Mass., allows the viscometer measures at the yield, in addition to the typical flow curve profile. Since this type of devices at low cost, R & D units will be affordable to address the issues mentioned above, using their own equipment.
Rotational mechanics
Rotational viscometer measures the torque necessary to rotate the spindle material. Spindle is driven by a motor through a calibrated spring, the spring deflection measured to calculate the amount of resistance to flow. Multiple speeds and interchangeable spindle rotation, using a variety of viscosity ranges can be measured.
click picture to enlarge
Rotational viscometer scheme
A certain viscosity viscous drag, or resistance to flow (the end of the spring), is proportional to the rotational speed and shaft size. Drag to increase the shaft size and / or rotational speed increase. Measurements made with the same shaft at different speeds are used to detect and assess the flow characteristics of the test substance.
The digital
Conventional digital viscometers used continuously sensing sensors, torque signal to monitor the spindle rotation. Programmable chips allow for testing programs to be stored directly on the viscometer head. These capabilities are due to a software program that transforms into a powerful analytical tool capable of more extensive rheological analysis of standard rotational viscometer, typically used for single point viscosity measurements of the distribution.
One particular software is the yield or flow of the beginning of the first attempts to rotate the shaft material. Algorithm to measure the wind spiral spring inside the viscometer head, comparing it to rotate the motor shaft angular distance traveled, and then calculate the stress and strain values ??associated with the sample material is tested. Vane shaft, the key to this approach is viable.
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A typical graph shows the yield stress test and vane viscometer spindle rotation speed is low.
Is a revolutionary advance, because it has not been done previously with a standard benchtop viscometer. There is a big price difference between the rotational viscometer This new capability and high-end Rheometer: $ 2.500 vs. $ 20,000 +. The latter figure is usually higher when it comes to software and accessories.
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Article Source :
http://www.articleseen.com/Article_Standard Benchtop Viscometer Reorganization_130774.aspx
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Author Resource :
Visit viscometer.co for all types of viscometer according to your need.
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Keywords :
viscometer, digital viscometer,
Category :
Business
:
Business
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