![]() ![]() This system produces a helical path for the spindle during the measurement (Figure 1 Insert). The Helipath Stand is an accessory to rotational viscometers and rheometers that incorporates a wire spindle (T-bar) and verticle drive unit. With the new generation rheometers, it’s possible to configure multi step tests and perform comprehensive data analysis directly from the touch screen interface of the instrument without the use of a PC (Figure 1). Viewing the data graphically and analyzing to come up with a final result requires the use of applications software. To overcome these problems, the Helipath Stand with T-bar spindles is commonly used to test highly viscous heterogeneous materials, gels, pastes, creams, putty and other non-flowing substances where traditional smooth geometries fail.Ī typical Helipath test may gather over four hundred data points from start to finish. ![]() Heterogeneous materials may consist of a moderate viscosity liquid filled with deformable solid particles which migrate away from the spindle during rotation, resulting in a measurement of the liquid viscosity rather than that of the mixture as a whole. ![]() Creams and pastes may be non-flowing, forming voids around the spindle, resulting in false low viscosity values. Measuring the viscosity of creamy, pasty or heterogeneous material presents a challenge for rotational viscometers when using traditional smooth geometries such as coaxial cylinder, cone-plate, or simple disk spindles. ![]()
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