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sold. This simple plastic device has an integral squeeze pump to start the
siphoning with a long, straight input hose and a flexible output hose.
A more effective method is a vacuum system with a container trap for
containment of the bath fluid. The continuous vacuum in such a system
provides an easy means to remove any solid dirt particles and completely
empty the bath.
Using a siphon or vacuum hose placed into one of the two instrument
holes at the top, transfer all of the bath liquid into another container.
Briefly turn on bath power and energize the fluid return pump by de-
pressing the push button on the rear of the Control Housing.
CAUTION
Do NOT leave TE-3000 power on without liquid in the bath!
Once it is apparent that most of the liquid has been removed from the
overflow jar and hoses and transferred back into the bath, remove the
power from the TE-3000 again and continue to siphon or vacuum the
bath liquid.
After the bath has been drained as much as possible, remove the overflow
jar and associated hoses from the rear of the Bath Vessel Housing and
empty their contents into this container.
Cleaning the inside of the bath vessel
Depending on the grade of alcohol being used as a bath liquid, the
frequency of replacing the bath liquid may vary greatly. The contami-
nants contained in solution with the alcohol will remain as sediment in
the bath after the alcohol evaporates. If the bath temperature is always
maintained at a cold temperature and the holes at the top are always
covered, the rate of evaporation of the alcohol will be at a minimum.
Conversely, if the bath is maintained in the power off condition and the
top holes are uncovered, the room temperature alcohol will evaporate
quickly.
After all of the bath liquid has been removed and the bath vessel is at
room temperature, the cleaning procedure can begin. The actual process
of cleaning is difficult at best without the proper cleaning implements. A
long handled brush, such as one available from Thomas Scientific (cat.
No. 1929-M80), permits scrubbing the baffle, side walls, and the inside
of the bath window. Again, a good quality household cleaning agent may
be used. Spray the liquid cleaning agent through one of the top holes in
the bath vessel and use the brush to scrub off the residue on the baffle,
side walls, and bath window. Water should be used to rinse the vessel and
a siphon or vacuum system for removing the remaining mixture from the
vessel. Ensure that the vessel is clean and dry before refilling with clean
alcohol. Use lint-free towels to wipe the vessel dry if a vacuum system is
not available.
CANNON
®
TE-3000 Thermoelectric Constant Temperature Bath
Version 1.1c — May, 2005; CANNON
®
Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
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