Brookfield Viscometer model and mobile codes

Each mobile has a 2-digit entry code for digital viscometer models. This input code allows direct calculation of viscosity, shear rate and shear stress.

Each mobile has two constants which are used for calculations. The mobile multiplier constant (SMC) is used for viscosity and shear stress calculations. The shear rate constant (SRC) is used for shear rate and stress calculations.

Note that in the case where SRC = 0, no stress / shear rate calculation is performed. The display for this data will simply show 0.

The following table gives the spring torsion (TK) values for each viscometer model.

The 100 % of spring torsion (maximum viscosity value) corresponding to each mobile / speed combination can be obtained from the following equation:

Viscosity at 100 % of torsion (centipoise) FSR = TK * SMC * 10000 / Speed (RPM)

The measurable viscosity range for each mobile / speed combination should correspond to spring torsion values between 10 % and 100 %.

To calculate the shear rate, apply the following formula: Shear rate (1 / Sec) = SRC x RPM