Cannon Instrument CAV-2000 - Manual (Page 28)

CANNON ® Automatic Viscometer Models CAV-2100 and CAV-2200 with VISCPRO ® Instruction & Operation Manual
Version 2g — May, 2009; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
22
Testing samples
Loading software 1. Turn on the computer and load the CAV software by double-clicking
the VISCPRO ® icon on the Desktop.
NOTES If the software is already loaded, use your computer mouse to click Main
from the menu bar and click Poll for Instruments from the Main menu
options. This will establish communications between the computer and
the on-line instrument.
Permit the bath(s) to stabilize at test temperature before testing samples.
2. Pour sample material into the glass vial(s). Fill to within 1.3 cm (½”)
of the top of each vial (somewhat less sample may be required for
testing in lower bulbs of the viscometer). Insert the glass vials into
the steel carrier cylinders and place the cylinders into the sample tray.
NOTES Do not fill the vials to the top. Sample overflow may damage the seals of
the LOAD cylinder. You should run calibration check standards per your
established laboratory procedures. Recalibrate the CAV (see Chapter 3,
Calibration) if result variance warrants.
3. Place the sample tray into the track underneath the viscometer tube.
Push the sample tray forward until the first vial is under the viscom-
eter tube. A heated sample tray should snap into position against the
detent mechanism when the front of the tray extends approximately 2
centimeters (3/4”) over the edge of the sample table. The forward
edge of an unheated tray will be indented approximately 2.2 centime-
ters (7/8”).
4. Ensure that the splash guard(s) in front of the viscometer tube has
been secured in place with the thumbscrew. If a splash guard has
been removed, replace it.
!
CAUTION The splash guard(s) may be removed to allow the user to handle the
sample not yet running (replace with a different sample, etc.). However,
make certain to return the splash guard to its proper position to prevent
sample/solvent contamination and to protect the viscometer tube tip. Do
not allow your hands to contact or obstruct the pneumatic mechanism or
heated sample trays and electrical connections.
5. Check the thermometer in the temperature bath to make sure the bath
is holding the proper temperature. If necessary, calibrate the CAV
temperature control probe using the temperature calibration proce-
dure in Chapter 3.
6. Open the View Instrument Group window (if it is not already open)
by clicking View Instrument from the Main menu and selecting the
desired instrument group from the list box (see Chapter 4 for more
information).