Cannon Instrument miniAV-LT - Manual (Page 83)

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CANNON ® miniAV-LT Automatic Viscometer with VISCPRO ® Instruction & Operation Manual
Version 1.a— May, 2009; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
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 window 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.
4. After the tube has been washed, click Done to close the Wash
Viscometer Tube window.Setting wash parameters
For information on using the computer to select wash parameters, see
Chapter 4.
Preventive maintenance
The miniAV-LT 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.