AR 2000 Operator's Manual
123
Appendix A
Useful Information
Moments of Inertia
The inertia of each geometry can be measured directly via TA Instruments rheology software. Below is a table
that shows the approximate inertia values for cone and plate and parallel plate systems. You are advised to
use the automatic inertia measurement feature in the software. (See the online help for information).
Units µNm s
2
.
Stainless Steel Acrylic
Diameter (mm) Standard Solvent Trap Standard Solvent Trap
20 1.06 2.80 0.45 0.43
40 4.35 6.92 1.39 1.34
60 17.70 23.32 4.77 3.03
Calculations for Moments of Inertia
Sometimes it may be necessary for you to manually calculate the moment of inertia. Below are the relevant
equations you will need.
Cone
Axis through vertex and center of circular base.
r radius
α angle of cone (degrees)
ρ density
inertia r
1
10
5
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