TA Instruments AR 2000 User Manual

AR 2000 Operator's Manual
59
The ratio R
1
:R
2
= R
3
:R
4
. The shear
rate is then calculated as in Figure
6.3 using R
3
and R
4
.
Using the
Stress and Shear Rate Factors
The TA Instruments operating system software calculates the stress and shear rate factors, which are used by
the software in all subsequent calculations.
However, there may be occasions when you will need to enter these factors manually. If you do, follow the
sequence given below:
1. Multiply the angular velocity (ω) by the shear rate factor ( F ) to obtain the shear rate (s
-1
).
2. Multiply the angular displacement by the same factor to obtain the strain (dimensionless).
3. Multiply the torque (T) (µNm) by the shear stress factor ( F
σ
) to obtain the shear stress (Pa).
Figure 6.5
Double Concentric

TA Instruments AR 2000 Specifications

General

Brand	TA Instruments
Model	AR 2000
Category	Measuring Instruments
Language	English