Cannon Instrument miniPV-X - Manual (Page 27)

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CANNON ® miniPV-Series Automatic Viscometer with VISCPRO ® Instruction & Operation Manual
Version 1.a— January, 2011; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
enter a sample ID, the sample is automatically labeled Unknown.
To select or change a sample action, highlight the appropriate Sample
ID(s) using the mouse or arrow keys, then click the RIGHT mouse button
to access sample action options:
No action
Determine Solution Relative Viscosity
Determine Blank (Solvent) Viscosity
Determine Solvent Viscosity
Verify Known RV
Measure Kinematic Viscosity
Verify Known KV
No action: If No action is selected, all information for that sample
position will be cleared and that carousel position will not be tested.
Determine Solution RV If Determine Solution Relative Viscosity is
selected as the test option for a sample, the Polymer Sample Measure-
ment Options window will open, permitting data entry of relevant param-
eters for the determination of RV. For information on data entry options,
Determine Solvent Viscosity If Determine Solvent Viscosity is se-
lected as the test option for a sample, the Polymer Sample Measurement
Options window will open,
Verify Known KV/RV If Verify Known RV (relative viscosity) or Verify
Known KV (kinematic viscosity) are selected as the test option for a
sample, the Polymer Sample Measurement Options window will include a
new data entry field, RV or Check Standard Viscosity, which permits the
user to enter the known RV or KV of the sample: This information will
permit the VISCPRO software to compare calculated RV or KV values
with known values to determine the accuracy of current calibration and
machine performance. Measure Kinematic Viscosity If Measure Kine-
matic Viscosity is selected as the test option for a sample, the VISCPRO
software will calculate kinematic viscosity for the sample using the
sample drop time and ASTM D 445 formulas.
Defining and using a solvent blank for RV analysis
Using a solvent blank Relative viscosity by definition is a ratio between
the absolute viscosity* of a solution containing a solvent and sample
material, and the absolute viscosity* of the pure solvent . VISCPRO
calculates this ratio by comparing sample drop times for the solution and
the solvent “blank”. The significance of the resultant value is enhanced as
two additional variables are taken into account—sample/solvent density
and (with drop times under 200 seconds) an empirically-determined
kinetic energy correction
constant.