fann 35A, Instruction Manual, Page: 33 / 44

Model 35 Viscometer Instruction Manual
208878 Revision N, February 2013 33
7.5 Measuring Ranges
The measuring ranges for shear stress, shear rate, and viscosity are listed in Table
7-6, 7-7 and 7-8, respectively.
Table 7-6 Shear Stress Measuring Range for Fann Direct Indicating Viscometer
Torsion Spring/
Viscometer Reading
Shear Stress Range (dynes/cm
2
) , τ
= (k
1
k
2
θ
)
Rotor-Bob Combinations
R1 B1 R2 B1 R3 B1 R1 B2 R1 B3 R1 B4
F 0.2
θ
= 1
o
1.02 1.02 1.02 2.01 4.1 8.2
θ
= 300
o
307 307 307 605 1225 2450
F 0.5
θ
= 1
o
2.56 2.56 2.56 5.04 10.2 20.4
θ
= 300
o
766 766 766 1510 3060 6140
F1
θ
= 1
o
5.11 5.11 5.11 10.1 20.4 40.9
θ
= 300
o
1533 1533 1533 3022 6125 12,300
F2
θ
= 1
o
10.22 10.22 10.22 20.1 40.8 81.8
θ
= 300
o
3066 3066 3066 6044 12,250 24,500
F3
θ
= 1
o
15.3 15.3 15.3 30.2 61.3 123
θ
= 300
o
4600 4600 4600 9067 18,400 36,800
F4
θ
= 1
o
20.4 20.4 20.4 40.3 81.7 164
θ
= 300
o
6132 6132 6132 12,090 24,500 49,100
F5
θ
= 1
o
25.6 25.6 25.6 50.4 102 205
θ
= 300
o
7665 7665 7665 15,100 30,600 61,400
F10
θ
= 1
o
51.1 51.1 51.1 100.7 204 409
θ
= 300
o
15,330 15,330 15,330 30,200 61,200 123,000