Cannon Instrument CT-1000HT (High Temperature Contant Temperature Bath) - Manual (Page 4)

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CANNON ® CT-1000HT Constant Temperature Bath
Revision 1.1b—June, 2011; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
Manual This manual is intended to provide information on the installation,
characteristics and operation of the
CANNON ® CT-1000HT Constant
Temperature Bath.
NOTE The CT-1000 video does not contain information regarding temperature
selection options above 150°C.
Temperature selection Ten of the most commonly-used temperatures for kinematic viscosity
measurement can be set by using a switch on the bath front panel. The
bath will equilibrate within a fraction of one degree of the desired
temperature. A fine-tuning control permits further temperature adjust-
ments. By using the variable temperature adjustment procedure, nearly
any temperature within the operating range of the instrument may be
obtained.
Bath description The bath chamber is a cylindrical clear vessel 300 mm (12 inches) in
diameter and 300 mm (12 inches) high. A stainless steel baffle is located
in the center of the bath and provides a convenient backdrop for viewing
viscometers placed in the bath. The top cover contains seven round holes
51 mm (two inches) in diameter for insertion of viscometer holders. Two
additional holes are provided for thermometers. Twin fluorescent lamps
provide glare-free illumination of the bath.
A solid-state control circuit equipped with a stainless steel-encased
thermistor provides proportional temperature control. A motor-driven
stirrer ensures that a uniform temperature is maintained throughout the
bath.
The bath housing is fabricated from heavy aluminum and coated with a
corrosion-resistant epoxy. The top cover consists of three layers; a
stainless steel top surface, an insulating layer, and a bottom stainless steel
heat reflector.
Safety features
Overheat thermistor A thermistor in the bath senses any over-temperature fault condition. If
such a condition occurs, all power is removed from the bath until an
operator resets the over-temperature limit circuit.
Thermistor detection/cutoff If the control thermistor is disconnected, all power to the bath heaters is
cut off.
Liquid-level control float Operation of the bath is not possible unless it is filled with liquid to a safe
operating level. A liquid-level control float prevents the control circuit
from heating the bath until the safe operating level is attained. The bath
heaters are automatically turned off if the bath liquid drops below the
minimum safe level.