Cannon Instrument CT-600 (Contant Temperature Bath) - Manual (Page 19)

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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
Verifying Limit Control operation
The Limit Control should be checked periodically to ensure its function-
ality. To check the Limit Control, follow the procedure below:
1. Power up the CT-500 and set the instrument to a desired bath tem-
perature. Wait for the temperature to stabilize at the desired tempera-
ture.
2. Using a screwdriver, slowly turn the Limit Control counterclockwise
until the Limit Control OVER TEMP warning lights up.
WARNING
If the Limit Control warning fails to light up and the Limit Control has been
adjusted counterclockwise to its furthest setting, the unit may need to be
repaired. Call CANNON
® for assistance.
3. When the Limit Control OVER TEMP warning lights up, turn the
Limit Control clockwise for ¼ turn and press the OVER TEMP
button to reset the Limit Control for normal operation.
Functionality of the Limit Control has been verified for the current
operational temperature. If it is necessary to reset the bath temperature,
follow the manual instructions (Setting the temperature, pages 10-13) to
reset the Limit Control for the new temperature.
Cleaning
CAUTION
Before cleaning the CT-500, turn off the instrument and unplug the power
cord. Do not clean the instrument unless the bath temperature is within
10°C of ambient.
Periodically clean the outside of the unit with a damp cloth moistened
with water and/or a mild detergent solution.
Using the thermoelectric cooling system (CT-600 only)
The CT-600 thermoelectric cooling system is activated via the front panel
On/Off switch. Thermoelectric cooling is generally recommended when
maintaining a bath temperature within 20 degrees of ambient.
The thermoelectric system should be turned off whenever the bath
temperature exceeds 50°C.