Cannon Instrument CT-600 (Contant Temperature Bath) - Manual (Page 14)

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CANNON CANNON CANNON CANNON CANNON ® CT-500/600 Series II CONSTANT TEMPERATURE BATH
Version 3..2—March, 2007; CANNON CANNON CANNON CANNON CANNON ® Instrument Company
2139 High Tech Road • State College, PA • 16803 • USA
NOTE Different thermometers have different immersion requirements. Refer to the
information included with the thermometer in use for specific instructions.
Filling the bath
Make sure that the bath is placed in its intended final position before
adding bath fluid. The CT-500 should not be moved with bath fluid in the
bath jar. NEVER USE FLAMMABLE BATH LIQUIDS.
1. Make sure that the instrument power is OFF and select a bath liquid
appropriate to your operating temperature range (see APPENDIX D).
2. Fill the jar with bath liquid at ambient temperature to a level sufficient
to engage the float switch. This float permits bath operation when the
minimum amount of fluid has been added to the bath jar.
3. Continue to add fluid until the bath liquid level has risen to approxi-
mately 40 mm (1.5") of the top of the jar.
4. Turn the instrument power ON and incrementally heat the bath to
desired control temperature while monitoring the bath liquid level
carefully. The bath level must be 15-20 mm (approximately ½" to
¾") from the top of the jar at the control temperature. If it becomes
apparent that this liquid level will not be achieved, return the bath to
within 10°C of ambient, turn the instrument power OFF and add or
remove liquid as necessary.
5. Repeat step four until you have attained the proper bath liquid level at
the desired control temperature.
CAUTION Different bath fluids expand at different rates. Do not overfill the bath!
WARNING Monitor the level of bath liquid closely when operating the CT-500 at
higher temperatures (80-100°C). The bath liquid will expand as the
temperature increases. The CT-500 bath jar is not designed to contain
liquid under pressure. If the bath is overfilled, liquid may overflow.
Draining the bath
If it becomes necessary to drain the liquid from the bath, obtain a suitable
container to hold all of the liquid drained from the bath (approximately 22
liters—4.5 - 5 gallons for the CT-500; approximately 30 liters—7 gallons
for the CT-518, approximately 38 liters—9 gallons for the CT-524).
Make sure that the bath liquid is within 10°C of ambient temperature.
Then insert a tube into the bath chamber from the top opening and siphon
the liquid from the bath into a container positioned lower than the bath.
WARNING Always use a rubber bulb or similar device to apply suction to a tube
containing bath liquids.