Cannon Instrument miniAV-X - Manual (Page 87)

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CANNON ® miniAV-X Automatic Viscometer with VISCPRO ® Instruction & Operation Manual
Version 1.0b— March, 2012; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
Ventilation
The miniAV-X requires installation of the supplied 3” ventilation hose to
the exhaust shroud on the rear panel of the unit. The shroud must be
connected to a customer-supplied exhaust fan/ventilation system. A 3”-4”
hose adapter is shipped from CANNON Instrument Company with each
miniAV-X unit. The air flow rate and design of the exhaust fan must be
suitable to handle the vapors from the customer-supplied solvent and
samples.
Checking bath temperature
After the miniAV-X has been turned on, you may monitor bath tempera-
ture via a reference thermometer in the bath or via the software tempera-
ture display (Sample Input window). Temperature should rise until the
bath has attained the desired test temperature. Consult the reference
thermometer to ensure that the miniAV-X is controlling at the desired
operating temperature. If the computer temperature display does not
agree with the reference thermometer, perform the temperature calibra-
tion 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.