M19-2101 REVISION 2.0 DVNEXT RHEOMETER - OPERATIONAL MANUAL
Table D-4
PRE-SHEAR SPEEDS (RPM)
Range Increment
0.01 to 0.09 0.01
0.1 to 5.0 0.1
6, 10, 12, 20, 30, 50, 60, 100, 200 N/A
ZERO STEP SPEEDS (RPM)
RANGE INCREMENT
0.01 to 0.09 0.01
0.1 to 0.5 0.1
RUN SPEEDS (RPM)
RANGE INCREMENT
0.01 to 0.09 0.01
0.1 to 5.0 0.1
The shear stress measurement range for the three standard (or supplied) vane spindles at each spring torque is as
follows:
Table D-5
SPINDLE MODEL CODE ON
DVNext ULTRA SCREEN
TK SHEAR STRESS RANGE
(Pa)
V-71 LV 09373 0.047 - 0.47
V-72 LV .09373 0.19 - 1.9
V-73 LV .09373 0.94 - 9.4
V-71 RV 1 0.5 - 5
V-72 RV 1 2 - 20
V-73 RV 1 10 - 100
V-71 HB 8 4 - 40
V-72 HB 8 16 - 160
V-73 HB 8 80 - 800
V-71 5xHB 40 20 - 200
V-72 5xHB 40 80 - 800
V-73 5xHB 40 400 - 4000
Calculations for Shear Stress in Yield Test
The following equations can be used to calculate the shear stress values after each packet of data is obtained from
the DVNext.
Where:
τ = Yield Stress (Pascals)
TK = Model Torque Constant from Table D-2
YMC = Yield Multiplier Constant from Table D-3
T = % Torque reading
The following equations can be used to calculate the strain data after each packet of data is obtained from the
DVNext:
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