12
Setting the Temperature
Your Cimarec stirring hot plate has an electronic
closed-loop feedback control which will accurately
maintain temperature setpoints in 5° increments from
5°C through 400°C or 540°C, depending on the model.
An unloaded hot plate will heat to maximum tempera-
ture in just 8 minutes. The temperature is controlled at
the top plate by the internal sensor. A “CAUTION -
HOT TOP” light on the front panel will illuminate when-
ever the top surface temperature exceeds 50°C.
Your Cimarec stirring hot plate will display the tempera-
ture in °C. When choosing a setpoint, the display will
indicate the setpoint for 5 seconds, after which the dis-
play will flash until the desired setpoint is reached.
The display will alternate between “HOT” and “OFF”,
and the “CAUTION - HOT TOP” light will flash until the
top surface has cooled to below 50°C. Nothing will be
displayed on the screen when the unit has been cooled
below 50°C and the knob is turned to OFF.
To Achieve Fast Heat-up of
Large Volumes
If you are heating larger volumes, faster heating can
be achieved by turning the heat control knob to maxi-
mum temperature until the solution starts to heat, and
then turning the setpoint back to your desired top plate
temperature. The display will flash the new setpoint
until that temperature has been reached.
Heating Small Volumes
Preheating small volumes is not necessary as it may
cause the temperature to overshoot the desired set-
point.
OPERATION
Note
The solution temperature is approximately
25% cooler than the hot plate surface
temperature.
Note
If you allow the top plate to reach the
maximum temperature of 540°C while
preheating and then turn the control down
to a setpoint less than 200°C, the temper-
ature of the top will drop rapidly to 200°C.
Because of the natural cooling character-
istics of ceramic, the temperature of the
top will drop much more gradually after
the top plate temperature reaches 200°C.
Note
Boiling times are dependent on solution
volume and the surface area of the flask
that is exposed to the hot plate. For
example, when heating the same amount
of solution in a 2L flask vs. a 1L flask, the
solution will heat about 20% faster.