Thermo Scientific HAAKE RotoVisco 1 Instruction Manual page 102

Sensor Systems
All sensor cones are individually calibrated by Thermo Fis-
her Scientific and the results entered in an accompanying
certificate as shown in the example below.
14.02.2007
Calculation Equations - - Cone/Plate
Shear Stress 
The shear stress  is proportional to the torque 'Md' and to
the stress factor 'A'.
 = A  Md
The factor 'A' is calculated as described in the following
equation:
3
A =
3
2 ⋅ π ⋅ R
K
[A] = 1
3
m
It has the unit of an inverse volume.
.
Shear Rate
γ
.
The shear rate is proportionally linked to the angular veloc-
γ
ity and thus speed and the shear factor 'M'.
.
= M ⋅ Ω
γ
100
with R = Cone Radius
K