Glossary
G-2
Full Scale
The upper limit, in engineering units, of a viscometer. For Brookfield
Process Viscometers, this value must be calculated from the torque
capacity, rotational speed, and the spindle design of the instrument.
Laboratory Measurements
Viscosity measurements made off-line by a different instrument, usually
for purposes of quality control. Due to the unique nature of viscosity
measurement, the numerical value of this measurement may not agree with
that measured by Brookfield Process Viscometers.
Laminar Flow
Flow which occurs when layers of fluid move uniformly with respect to
one another, without mixing between elements.
Measuring Chamber
The container through which a fluid is caused to flow, in laminar flow
conditions, and where its viscosity is measured.
Repeatability
The ability of an instrument to measure the same value whenever identical
conditions of viscosity are presented to it. For Brookfield Process
Viscometers, deviation is expressed as a percentage of full scale.
Shear Rate
The speed at which layers of fluid move with respect to one another.
Also known as velocity gradient.
Shear Stress
The force per unit area required to move layers of fluid with respect to one
another.
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