Cannon Instrument miniPV-X - Manual (Page 87)

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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
reference thermometer to ensure that the miniPV Series is controlling at
the desired operating temperature. If the computer temperature display
does not agree with the reference thermometer, perform the temperature
calibration procedure per manual instructions.
Dual-solvent washing
For testing heavy oils or hard-to-clean materials, CANNON ® Instrument
Company recommends a dual-solvent washing system. The dual-solvent
washing process uses two different solvents. The first wash might
ordinarily use a heavy solvent to clean the sample residue out of the
viscometer tubes. The second wash might use a lighter solvent to clean
the remaining sample and solvent residue from the viscometer tube.
Consult Chapter 1 for information on dual-solvent connections.
Solvent wash by computer
Use the following procedure for computer-controlled solvent washing:
Procedure 1. If the desired tube is testing a sample, wait until the test is complete
OR click the Abort button from the Sample Input wi ndow and select
the tube/tray to abort from the Select Trays window. Then click
OK .
2. Proceed with the solvent wash by clicking the Wash Tubes button
from the Sample Input or Machine Status windows. Or you may
click on Service/Wash Viscometer Tube from the VISCPRO ®
primary menu options.
3. Click on Begin Wash to initiate a solvent wash using current wash
settings. During the wash cycle, the Begin Wash button will change
to Abort Wash . If it is necessary to interrupt the wash cycle, click
Abort Wash .
NOTE The wash procedure will have to be successfully completed before further
sample testing will be allowed. For information on using the computer to
select wash parameters, see Chapter 4.
4. After the tube has been washed, click Done to close the Wash
Viscometer Tube window.
Preventive maintenance
The miniPV Series is a precision instrument, durably crafted for years of
trouble-free operation. Because of the desirability of consistent viscosity
measurements over time, preventive maintenance is limited primarily to
cleaning and inspection procedures, rather than regular replacement of
equipment items.
Following is a recommended PM schedule. You may copy the checklists
and use them to track your PM actions. For detailed descriptions of listed
procedures, consult related sections of this manual.