14
CANNON
®
CT-1000 Constant Temperature Bath
Revision 3.1a—February, 1998;
CANNON
®
Instrument Company
P.O . Box 16 • State College, PA • USA
NOTE
All the dials except
Temperature SELECT
are equipped with a dial lock to
prevent accidental changing of dial settings. Push the lock upward to
release the dial. When the dial has been set to the proper position, push
the lock downward to relock the dial.
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-1000. 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, when 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 F), 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
Temperature
Adjust FIXED
dial, it may be necessary to adjust the small trimpots on
the circuit board in the electronics drawer (see Appendix D).
Variable temperature adjustments
To set the bath to a temperature that is not on the
Temperature SE-
LECT
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