Cannon Instrument CAV-2000 - Manual (Page 24)

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
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0.05°C of the target temperature, the current bath temperature will be
displayed in large type (CAV-2100 only) on the display.
Preparing the bath
When operating in Local mode, visually check the condition of the
viscometer tubes prior to initiating a sample run. If sample or solvent
residue remains in the tube, use the Local mode options to wash and/or
dry the tubes (see Chapter 5, Solvent wash by operator (Local mode)).
Testing samples
1. Pour the test sample into a glass vial and slide the vial into the steel
vial adaptor in the sample tray.
NOTE Do not fill the vials to the top. Sample overflow may damage the seals of
the LOAD cylinder.
2. Position the vial directly underneath the viscometer tube, using the
detente mechanism as a guide in orienting the sample. 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 centimeters (7/8”).
3. Press the Test button.
4. Select the desired tube for testing (Left (1) or Right (2)).
5. Select the desired protocol for the sample drop:
Run (Determine Bulb) will calculate the optimal test bulb.
Run (Use Previous Bulb) will test the sample using the same bulb
as the previous test (this option is desirable when averaging multiple
drop times for the same sample).
The sample will be tested and the drop time and/or kinematic viscos-
ity (see next page) will be indicated on the VFD.
6. After the test has been completed, you may rerun the sample using
the above procedure, or wash the tube using the keypad WASH
option (see pages 18-19 for details on keypad options).
Aborting a test
To immediately halt testing for a given tube/tray (left/right), press the
Stop Left and/or Stop Right button on the keypad. On rare occasions
when it is necessary to quickly abort tests on both tubes and remove
power from the unit, press the red power button on the control panel.
NOTE Aborting a test using either method clears all sample test information for
that tray. If test actions are aborted, it is the responsibility of the user to
restore the instrument to a safe state before running tests (see Local
mode diagnostics/maintenance in chapter 5 for more information).