Cannon TE-3000, Инструкция по эксплуатации

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11
CANNON
® TE-3000 Thermoelectric Constant Temperature Bath
Version 1.1c — May, 2005;
CANNON
® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
CHAPTER
4 44
44 GENERAL OPERATIONS
A. Filling the bath with liquid
Prior to filling the TE-3000 with liquid, you should ensure that the bath
overflow liquid reservoir, pump, and hoses are properly in place. For
detailed installation procedure, please see the previous Chapter 3.D
The TE-3000 should be filled through one of the top instrument holes
with a clear, alcohol type, liquid. This alcohol may be either wood or
grain based.
CAUTION
Do not use silicone fluid!
The dilution of this alcohol should be such to permit adequate stirring at
the lowest operating temperature. Excessive water dilution will cause the
liquid to appear cloudy at cold temperatures and thus impair the visibility
in the bath.
Using room temperature alcohol, carefully pour the liquid into a funnel
sitting in one of the instrument holes at the very top of the Bath Vessel
Housing. As the bath liquid approaches the very top of the bath vessel,
the overflow liquid will spill down the overflow tube into the jar.
Bath volume changes The amount of “extra” liquid available in the overflow jar will depend
upon what temperatures you will be operating the bath. Also, some bath
liquid will be displaced by the addition of instruments and thermometers
into the bath - and thus cause the level to rise.
The bath liquid will expand if warmer than room temperatures are
desired. An empty jar at room temperature will fill up with the expanded
liquid as the temperature rises. In this case, you would only install
enough bath liquid to have the level just below the bath top edge and no
liquid in the jar.
Do not overfill the bath.
The bath liquid will contract if colder than room temperatures are
desired. An almost full jar at room temperature will be depleted with the
compressed liquid as the temperature falls. In this case, you would fill the
bath and about half of the over flow jar with the room temperature liquid
and after the insertion of the instruments, the jar would be almost full.
The purpose of the previous explanations is to illustrate that the steady
state room temperature condition of the bath must be such that you
should never spill any liquid and this level should be maintained with
time after some of the alcohol evaporates.