Brookfield R/S Coaxial Cylinder Rheometer - Manual (Page 32)

Brookfi eld Engineering Labs., Inc. Page 32 Manual No. M08-219-B1211
VI.5.1 MAIN Menu
→
Run Single
This function carries out a measurement of shear stress or shear rate at a constant preset value.
The physical units for each type of measurement are listed as follows:
Shear Rate D[s -1 ]
Speed n[rpm]
Shear Stress Tau [Pa]
Torque
M [‰] [1000‰ corresponds to 50 mNm]
After turning on the rheometer followed by the initial self-test (Section VI), the startup screen is
reached automatically:
MAIN-Menu
Run Single
-Run Program
-Remote
>
This menu contains
additional entries
Active entry: press
OK to select
VI.5.2 MAIN Menu
→
Single Measurement
This function sets the shear stress or shear rate (CSS or CSR) at a single constant user defi ned
value. The user may select a choice of measurement method from the following:
Shear Rate D [s-1]
Speed n [U/min] or [rpm]
Shear Stress Tau [Pa}
Torque M[ ‰ ] [1000 ‰ corresponds to 50 mNm]
Before you can start the measurement itself, you have to input the following values:
Selection of the measuring system used (see Section VI.3: Selecting from Lists)
Selection of test method. This is where you decide if you want to carry out a shear rate
measurement (shear rate, speed) or a shear stress measurement (shear stress, torque).
Input of preset values (see Section VI.4: Input of Numerical Values).
-
D[s -1 ] The range of values depends on the measuring system
- n[rpm] 0.1 to 1,000 rpm (U/min)
- Tau [Pa] The range of the values depends on the measuring system
- M [‰] 0 to 999 ‰
Input of desired number of measurement points (see Section VI.4: Input of Numerical
Values).
Input of the measurement duration in seconds. The minimum time interval depends on
the kind of the measurement and on the number of measurement points. The minimum
times between 2 measurement points are:
- shear rate measurement t
MP
>= 4 s
- shear stress measurement t
MP
>= 1 s
Note: The longer the time between two measured values, the higher the accuracy of the
physical values determined!
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