10
CANNON
®
CT-1000 Constant Temperature Bath
Revision 3.1a—February, 1998;
CANNON
®
Instrument Company
P.O . Box 16 • State College, PA • USA
Figure 13: Filling the CT-1000 bath
Filling the bath
After CT-1000 assembly
is complete, you are
ready to fill the bath.
CAUTION
Make sure that the bath is
placed in its intended final
position before adding
bath fluid. The CT-1000
should not be moved with
bath fluid in the bath jar.
NEVER USE FLAM-
MABLE BATH LIQUIDS.
1. Make sure that the
instrument power is
OFF
and select a
bath liquid appropriate
to your operating
temperature range
(see APPENDIX C).
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-1000 at
higher temperatures (100-150°C). The bath liquid will expand as the
temperature increases. The CT-1000 bath jar is not designed to contain
liquid under pressure. If the bath is overfilled, liquid may overflow.