Thermo Scientific HAAKE RotoVisco 1 Instruction Manual page 83

Sensor Systems
 - Range
The viscosity measuring range is derived from the  - and γ
range in accordance with the Newtonian conditional equation.
The four fundamental values in the diagram can be calcu-
lated as follows:
smallest viscosity at max. shear rate
  (min) =  (min) / γ
smallest viscosity at min. shear rate
  (min) =  (min) / γ
largest viscosity at min. shear rate
  (max) =  (max) / γ
largest viscosity at max. shear rate
  (max) =  (max) / γ
With these four fundamentals, the viscosity range is defined.
It is easily comprehensible that the measurement fault in the
extreme ranges is very large. It gets smaller as the torque in-
creases and the angular velocity decreases.
.
γ

.
min
γ
max
.
γ
min

min

min
81
.
η = τ∕γ
.
(max)
.
(min)
.
(min)
.
(max)
.
-

max

max


max