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TIP: To ensure that the correct spindle code is always entered, create a test that is saved to the DVNext memory.
TIP: The selection of spindle can be restricted by User Log In. Use this restriction combined with a saved test
configuration to ensure that the correct spindle is always used for critical tests.
A Special Spindle can be created when the user has developed a new spindle geometry or when using a standard
AMETEK Brookfield spindle in a non-standard measurement container. The Special Spindle, once created, will be
available to users through the Spindle selection in Configure Viscosity Test.
A Special Spindle is created by selecting the Special Spindle command button in the Edit Spindle List menu. A
Special Spindle requires a code, a name, and an SMC value. Optional values include SRC and YMC.
Code
The code is the numerical value used to select the spindle. This value must be unique and cannot be
the same as a standard AMETEK Brookfield spindle. The acceptable range for Code is 100-199.
Name
The Name is a unique value to describe the spindle. The Name will be displayed in the Spindle field.
The Name can be comprised of alpha and numeric characters.
SMC
The SMC (Spindle Multiplier Constant) is used to convert the measured torque to viscosity. The
acceptable range of SMC is 0.001 – 500.
The SMC value can be determined through the use of the Range equation found in appendix D. Some
experimentation with the spindle and a calibrated viscosity standard is required.
Range (cP) = TK * SMC * 10,000/RPM
SRC
The Torque Constant (TK) can be found in Table D-2 in Appendix D.
The SRC (Shear Rate Constant) is used to convert the set RPM to shear rate and calculate Shear
Stress. The acceptable range of SRC is 0.001 – 500.
The SRC value can be determined if the shear rate characteristics of the spindle geometry are known.
Consult the AMETEK Brookfield publication, "More Solutions to Sticky Problems", for a discussion
about shear rate and some recomended equations. Shear Rate (1/s) = SRC * RPM
YMC
The YMC (Yield Multiplier Constant) is used to convert the measured torque to yield stress.
Speed List
The selection of Speed in Configure Viscosity Test can be done by using either a number pad or a scroll list. (This
choice is selected through the navigation button in the Set Spindle screen). When scroll list is selected, the speed
entry is restricted to the classic AMETEK Brookfield speed sets for the LV and RV/HA/HB rheometers. The contents
of the scroll list are defined in the Speed List menu. Each speed can be individually selected or deselected through
the use of a check box. Select or deselect all speeds by using the Select All check box. Select or deselect all LV (or
RV/HA/HB) speeds by using the Select All LV check box. The classic AMETEK Brookfield speed sets are defined
below.
LV:
RV/HA/HB:
Additionally, a new speed can be added to the list by selecting the New Speed command key at the bottom of the
display. The New Speed must be selected within the range of available speeds on the DVNext: 0.0 – 250 RPM. Speed
entry through the number pad is never restricted.
TIP: To ensure that the correct speed is always entered, create a test that is saved to the DVNext memory.
TIP: The selection of speed can be restricted by User Log In.
M19-2101 REVISION 2.0
0.3, 0.6, 1.5, 3, 6, 12, 30, 60
0.5, 1.0, 2.0, 2.5, 4, 5, 10, 20, 50, 100
D V N E X T R H E O M E T E R - O P E R AT I O N A L M A N U A L
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