Cannon Instrument CMRV-5000 - Manual (Page 74)

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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
The CMRV-5000 will
measure the speed of rotor
rotation by timing the
revolution(s) of the pulley-
wheel as the weight falls.
NOTE The total number of rotations
measured by the CMRV-5000
during the viscosity test depends
on the viscosity of the sample
and the values chosen in the
Advanced Settings box. Default
values for the Advanced Settings
correspond to the specifications
of the ASTM method selected for
the profile.
7. When the Viscosity LED on
the CMRV front panel stops
flashing, indicating the
conclusion of the viscosity
test, remove the hook-weight from the string.
CAUTION Do not remove the weight while the Viscosity LED is still flashing.
NOTE To view test results as soon as they have been recorded in the database,
open an MRV Data Table analysis with the Use Dynamic Update option
(see Chapter 13).
8. To test additional cells, repeat steps 1-7 above, testing in order from
left to right.
After all viscosity tests have been concluded, select End Profile from
the Instrument View window to terminate temperature control of the
CMRV.
NOTE No further testing can be conducted after temperature control has been
aborted.
Notes on viscosity testing
Do not let the large hook-weight swing back and forth during testing or
the apparent viscosity measurement may be distorted.
Viscosity data The computer determines the apparent viscosity, along with the time
required for rotation of the rotor. Time and temperature data for the test
is recorded in the associated .ttd file.
Notes on ASTM methods
The protocols for measuring viscosity differ considerably between the
ASTM methods. For further information on the methodology used to
measure viscosity, consult the applicable ASTM method.
Placing the large hook-weight in
preparation for the test.