Cannon Instrument CAV-2000 - Manual (Page 22)

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
16
Ferrule
Cap
Plug
Cable
Connector
Thermometer
Tray/drain heat operations
To provide power to the heated sample trays and/or heated drain lines
which may be installed on your CAV unit, use the heater ON/OFF
switches on the left side of the front panel. These two switches provide
power to left- and right-hand heating elements. To adjust temperature,
use the Adjust knobs on the upper front panel of the Bath Unit. Turn the
knobs clockwise to increase temperature and counterclockwise to lower
it. The knobs regulate the duty cycle of the heaters for the sample trays
and the drain lines. The low-temperature sample heaters will maintain
temperature stability as high as 80°C. The high-temperature sample
heaters will maintain temperature stability as high as 100°C.
CAUTION
Avoid skin contact with heated sample trays, as burns may result. Use
appropriate protection when handling heated samples, vial adaptors, and
sample trays.
Inserting/removing the CAV reference thermometer
Inserting the thermometer ASTM thermometers with specially-
fitting adaptors for the CAV instrument
(see photos) are available from CAN-
NON
® Instrument Company. Digital
therometers meeting the ASTM D 445
specifcation are also available.
1. To install the reference thermometer,
check the current temperature of the
CAV bath and select the calibrated
thermometer appropriate for that
temperature.
2. Using the two opposing 0.05” Allen
screws, secure the thermometer
adaptor plate to the connector on the thermometer cable.
3. Using a ladder to access the top of the CAV Bath Unit, remove the
knurled cap, ferrule and O-ring from the thermometer holder.
4. Insert the thermometer assembly into the holder until the plug with
O-ring is seated inside the top of the holder. Rotate the plug until the
thermometer scale is easily visible from the Bath Unit front window.
5. Slide the ferrule over the end of the plug until it seats against the O-
ring.
6. Place the knurled cap over the plug and rotate the cap clockwise to
secure the cap to the top of the thermometer holder. Tighten finger
tight to seal the connection.
Removing the thermometer To remove the reference thermometer, permit the bath to cool below
80°C and reverse the above procedure. Use appropriate safety procedures
when handling the thermometer assembly, as it contains mercury.
For additional information
and details for CAV
thermometer installation/
removal, see Appendix A.