Cannon Instrument miniQV-X - Manual (Page 87)

81
CANNON ® miniQV-X Automatic Viscometer with VISCPRO ® Instruction & Operation Manual
Version 1.0— October, 2008; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
Ventilation
The miniQV-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
miniQV-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 miniQV-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 miniQV-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 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.
NOTE The wash procedure will have to be successfully completed before
further sample testing will be allowed.