Cannon Instrument CT-600 (Contant Temperature Bath) - Manual (Page 18)

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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
switch ON to maintain temperature control. When the PH switch has been
turned on, the PH - HEAT LED will light.
When the bath temperature is approximately that selected with the T -
SELECT switch, the LED above the TA controls will start to blink as
the heater duty cycle is automatically adjusted to stabilize temperature.
3. Release the lock on the TA - VARIABLE dial.
4. Read the thermometer in the CT-500 bath to determine the actual
temperature of the bath. Make sure that both the thermometer and the
bath temperature have stabilized before taking a reading.
5. Turn the TA - VARIABLE dial to adjust the temperature. Turn the
dial clockwise to increase the bath temperature. Turn the dial coun-
terclockwise to decrease the bath temperature. After each adjust-
ment, allow several minutes for the bath temperature to stabilize.
6. When the desired temperature has been reached, re-lock the TA -
VARIABLE dial.
Limit Control After the bath has reached the desired temperature, set the HIGH
TEMPERATURE LIMIT CONTROL (LC). This will prevent the bath
from overheating if a malfunction occurs.
Adjusting the High Temperature Limit Control
NOTE During this procedure, the temperature of the bath may change slightly,
but will quickly recover.
1. Using a screwdriver, slowly turn the LC - TEMPERATURE
ADJUST control counterclockwise until the OVER TEMP message
lights up on the LC - PUSH TO RESET button.
2. Turn the control clockwise approximately ¼ to ½ turn.
3. Push the LC - PUSH TO RESET button. If the bath doesn't recover,
repeat step 2 and try again.
NOTE If the desired temperature is within 2 or 3°C of a temperature listed on
the T - SELECT dial, it may be possible to attain the temperature using
the TA - FIXED dial. Because this dial has a finer adjustment than the
TA -VARIABLE dial, the final temperature can be more easily obtained.
To try this alternative method, follow the previous instructions, using the
TA - FIXED dial instead of the TA - VARIABLE dial.