Cannon Instrument CAV-2000 - Manual (Page 90)

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
84
5. Press and HOLD the 1 key down to initiate a vacuum that will draw
cleaning solvent into the viscometer tube. Wait until the solvent has
ascended to the desired level; then release the 1 key to permit the
solvent to drain. You may continue to press and release the 1 key as
necessary to draw cleaning solvent through the tube.
CAUTION
Use appropriate solvents for manual cleaning. Take all safety precau-
tions appropriate for the solvent used. Do not permit solvent to rise
above the level of the third bulb (second bulb in Fast-Run tubes). Do not
use alkaline solutions to clean CAV viscometer tubes.
6. Press the 2 key (Cup Down) to lower the sample platform. Any
remaining cleaning solvent should drain out of the tube.
7 Repeat steps 1-6 using 4 vials of distilled water in place of the
cleaning solvent. Do NOT let the water soak in the viscometer tube.
CAUTION The distilled water may rise in the tube MUCH faster than the cleaning
solvent. Do NOT let the water meniscus rise above the top bulb.
8. If the tube is still dirty, repeat steps 1-7.
9. Repeat steps 1-6 substituting isopropyl alcohol in place of distilled
water to dry the tube. After draining the isopropyl alcohol, remove
the vial from the sample table.
10. Use the Local or Remote mode wash options (see previous sections)
to remove all traces of cleaning solvent.
See the table on page 21 for additional information on using the Manual
Tube Fill service keypad option (MENU/Service/Manual Tube Fill)
and other service functions.
Handling fault conditions
The CAV Bath Unit will display a fault condition when hardware or
communication problems are experienced that are incompatible with
continued bath operation.
In this event, power is automatically removed from the bath heaters and
CAV testing is aborted. The Bath Unit generates a warning tone and
FAULT is indicated on the display. Press ENTER to display a diagnos-
tics screen with information about bath function.
To resume normal operation when possible, remove power from the
instrument. Then turn the power back on to initiate the automatic start-up
self-test sequence. Note any unusual indications during start-up.