85
CANNON
®
Mini-Rotary Viscometer
CMRV-5000
Instruction & Operation Manual
Version 1.0b—August, 2011;
CANNON
®
Instrument Company
2139 High Tech Road • State College, PA • 16803 • USA
NOTE
When the user is designing an entirely new profile “from scratch”, the test
parameters will default to ASTM D 4684 specifications. Copies or modifi-
cations of standard profiles will default to the parameters associated with
the ASTM method (D 3829 or D 4684).
Changing test parameters
To change test parameters:
1.
Open the Profile Designer.
2.
Select the desired profile and click the
Create ...
,
Copy ...
or
Edit
...
button as desired. The
Profile Editor
window will open.
3.
Enter appropriate test parameter values. See the chart below for
information on default test parameters.
5. Make any other necessary changes to the profile; then save the
profile by clicking the
Save
button from the
Profile Editor
window.
NOTE
The new settings will be effective for that profile and any copies or
modifications based on that profile.
Profile Designer Test Parameters
Option
Default
Description
Mass increment
10
Amount of mass added at each repetition of yield stress testing. A ten-gram
hook-cage and nine additional 10-gram weights are provided for CMRV
testing. The ASTM D 6821 Method specifies increments of 2.5 grams.
Yield Test Minimum
Degrees Rotation
10
This parameter adjusts the amount of pulley-wheel motion required by the
digital-optical sensor for a determination of no yield stress. The 13° setting is
for ASTM D 4684 and ASTM D 6821. For ASTM D 3829 use 10°.
Yield/Viscosity Test
Timeout
30 or 120
(15 or 60 seconds)
Amount of time (in 0.5 second increments) allocated for each test. The default
Timeout value for Yield Stress testing is 15 seconds and the default value for
Viscosity testing is 60 seconds.
Viscosity threshold
20 or 120
(10 or 60 seconds)
Amount of time (in 0.5 second increments) permitted for the first ½ revolution
of the rotor shaft if measuring three full rotations. ASTM D 3829 specifies 60
seconds; ASTM D 4684 and ASTM D 6821 specify 10 seconds.
Viscosity test
timeout
120 (60 seconds)
Maximum amount of time (in 0.5 second increments) permitted for completion
of the viscosity test.
Calibration
temperature
-20 (°C)
The cells can be calibrated at multiple temperatures. This setting selects the cell
constants used for determining viscosity. This value should ordinarily be the
final temperature of the profile.
Calibrate Twice?
not checked
The cell calibration may be performed twice if desired by the user. Empirical
testing suggests that a double calibration may enhance test accuracy.