How do you pick a spindle for a Brookfield viscometer?
How do you pick a spindle for a Brookfield viscometer?
If the reading is below 10% at the highest speed, the next largest spindle should be used. To test a fluid at multiple speeds, choose a spindle that will produce readings between 10% and 100% for at least three speed settings.
Which spindle is used in Brookfield viscometer?
All standard LV torque Brookfield Viscometers/Rheometers are supplied with a standard spindle set (LV-1 through LV-4) constructed of #302 stainless steel. Additional spindle options are available in #316 stainless steel or Teflon coating for increased corrosion resistance.
What is the use of spindle in viscometer?
The Dial Viscometer rotates a sensing element in a fluid and measures the torque necessary to overcome the viscous resistance to the induced movement. This is accomplished by driving the immersed element, which is called a spindle, through a beryllium copper spring.
Which spindle number is used to determine viscosity?
Calculate the viscosity in centipoises by multiplying the meter reading by the multiplier corresponding to the particular spindle used. Long-term retardants have typically been measured using a #2 spindle for viscosities up to 500 cP and a #4 spindle for viscosities greater than 500 cP.
How does spindle size affect viscosity?
For a material of given viscosity, the resistance will be greater as the spindle size and/or rotational speed increase. The minimum viscosity range is obtained by using the largest spindle at the highest speed; the maximum range by using the smallest spindle at the slowest speed.
What are spindles?
Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.
What is LV RV in viscosity?
LV is for low viscosity materials and can measure the thinnest materials. Typical examples include inks, oils, and solvents. RV is for medium viscosity materials than those measured with an LV torque. Typical examples include creams, food, and paints.
How does a Brookfield viscometer measure viscosity?
Brookfield viscometers employ the well-known principle of rotational viscometry; they measure viscosity by sensing the torque required to rotate a spindle at constant speed while immersed in the sample fluid. The torque is proportional to the viscous drag on the immersed spindle, and thus to the viscosity of the fluid.
What are the different types of spindle?
Varieties of spindles include grinding spindles, electric spindles, machine tool spindles, low-speed spindles, high speed spindles, and more.
How many types of spindles are there?
There are 2 types of spindle fibres which are identified – the interpolar fibre, stretching continuously from one to another of the spindle; kinetochore fibre. It stretches from the pole to the kinetochore of a chromosome.
What is LV in Brookfield viscometer?
LV is for low viscosity materials and can measure the thinnest materials. Typical examples include inks, oils, and solvents. RV is for medium viscosity materials than those measured with an LV torque.