Cannon Instrument CT-1000HT (High Temperature Contant Temperature Bath) - Manual (Page 16)

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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
Setting the bath temperature
There are two ways to set the bath temperature, depending on whether or
not the desired temperature is on the Temperature SELECT dial.
Fixed temperature adjustments
To set the bath to a temperature on the Temperature SELECT switch:
1. Choose a temperature using the Temperature SELECT switch.
NOTE The Preheat switch activates an auxiliary heater for the CT-1000HT. You
may turn it ON to heat up the bath more rapidly. You should turn the
Preheat switch OFF when the desired temperature is reached if the
operational temperature is under 120°C. For bath temperatures in
excess of 120°C, the Preheat switch must remain ON to maintain
temperature control. After the Preheat switch has been turned ON, the
Preheat HEAT light will glow continuously until the bath temperature is
approximately that selected with the Temperature SELECT switch. Then
the light will begin to blink.
The light above the Temperature Adjust control will glow steadily when
the bath is heating. The light will start to blink when the bath temperature
is approximately that selected with the Temperature SELECT switch.
2. To adjust the bath to the exact temperature, read from the kinematic
viscosity thermometer (see Appendix D), then release the dial lock on
the Temperature Adjust FIXED dial and turn the dial to incremen-
tally adjust the temperature. To decrease the temperature, turn the
dial counterclockwise; to increase the temperature, turn the dial
clockwise. Relock the Temperature Adjust FIXED dial after each
adjustment and allow several minutes for the bath to equilibrate.
NOTE If the desired temperature cannot be obtained by turning the Tempera-
ture Adjust FIXED dial, the small trimpots on the circuit board in the
electronics drawer may require adjustment. Consult CANNON
® service.
Variable temperature adjustments
To set the bath to a temperature that is not on the Temperature SELECT
switch you should use the following procedure:
1. Turn the Temperature SELECT switch to the temperature closest to
that desired.
2. Move the Temperature Adjust SELECT switch to the right.
NOTE The Preheat switch activates an auxiliary heater for the CT-1000HT. You
may turn it ON to heat up the bath more rapidly. You should turn the
Preheat switch OFF when the desired temperature is reached if the
operational temperature is under 120°C. For bath temperatures in
excess of 120°C, the Preheat switch must remain ON to maintain
temperature control. After the Preheat switch has been turned ON, the