Cannon TE-3000, Инструкция по эксплуатации

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CANNON
® TE-3000 Thermoelectric Constant Temperature Bath
Version 1.1c — May, 2005;
CANNON
® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
Selecting/canceling options To access any of the primary keypad options, press the appropriate
keypad button once. If you make a data entry error and wish to cancel
your input sequence, press the same keypad option button again.
The ENTER key The
ENTER
key is the most-used feature on the TE-3000 keypad. You
must confirm each submenu choice and numeric input by pressing this
key.
E. LED indicators
The two LED indicators on the right side of the front panel signify the
actual control signals commanding the temperature control of the bath.
The
COOLING
indicator (green LED) may be viewed as a multiple
intensity light with brightness directly proportional to the degree of
cooling power applied to the solid state coolers (thermoelectric modules).
The
HEATING indicator (red LED) is more simply on or off and at
warmer temperatures it will blink at one second intervals to signify that
power is applied to the internal heating element in the bath. The
HEATING
indicator will be fully illuminated if the bath is commanded
to go to a temperature much warmer than the current temperature.
F. Adjusting the liquid level in the bath
Assuming that the bath has already been filled according to the instruc-
tions as provided in Chapter 4-A, the user must adjust the level of the
bath liquid as the bath temperature is decreased. Since the bath liquid
decreases in volume as the temperature decreases, the operator must add
liquid to the bath vessel to maintain proper circulation.
Maintaining bath liquid level The level of the liquid inside the bath vessel must be maintained at a
level approximately 1/2 inch above the top edge of the rear (white)
baffle. When the liquid is adjusted to the proper level, a large number of
bubbles will be visible rising behind the baffle and causing some turbu-
lence at the surface of the liquid. A push-button switch is provided on the
upper rear right hand side of the lower Control Chassis which when
depressed, activates the small pump next to the overflow jar which
returns the liquid from this jar back into the bath vessel.
Adequate expansion volume is provided in the expansion jar so that you
may operate at -35° Celsius with the bath liquid maintained at approxi-
mately 1/2 inch above the top edge of the baffle with the
expansion jar empty. When the bath is powered-off from this condition,
the liquid will expand in the bath vessel and overflow into the jar. The jar
is of sufficient size to accommodate all of this expansion liquid without
overflowing as the temperature slowly rises up toward room temperature.