CONTROLS & CALIBRATION
The controls for Problot ovens include power to the oven, temperature setting and
display and rotisserie power and speed. The controls are located at the bottom front
of each oven. A safety electrical circuit breaker is also supplied on the back of each
oven.
-Main Power Switch - This switch (illuminated green when on) turns the power to the
unit Off and On.
-Temperature Controller and Temperature Set – The controller has a 3-digit display
for displaying chamber temperature or set point information. UP and Down arrow
pads are used to change the set point and controller mode of operation. To enter the
set point mode of operation on the controller, press either the UP or DOWN arrow pad
one time. The display will start to blink, going from bright to dim. While blinking, the
display is showing the set point. To change the set point, use the UP and DOWN arrow
pads. If the arrow pads are not pressed for five (5) seconds, the display will stop
blinking and will read the chamber temperature. Allow at least one hour for the
chamber
temperature to stabilize and 24 hours for optimum stabilization.
-Calibration- The oven is calibrated at 65ºC at the factory. The oven can be re-
calibrated after the chamber temperature has stabilized at the set point for several
hours. Suspend a certified reference thermometer in a hybridization bottle such that it
does not touch the glass bottle sides or (less accurate) tape the reference thermometer
to the outside wall of a hybridization bottle. Mount the bottle on the rotisserie (and a
second bottle for balance) and run the unit at the desired temperature for 2 hours.
Compare the oven display to the reference thermometer. If there is an unacceptable
difference, put the controller into calibration mode by pressing both the UP and DOWN
arrow pads at the same time until the two outside decimal points begin to flash. While
the decimal points are flashing, the display can be calibrated to match the reference
thermometer by pressing the UP or DOWN arrow pads until the display reads the
correct value. Allow the incubator to stabilize again, and recalibrate if necessary.
-Heating Indicator-This indicator will illuminate green when the controller is calling for
heat from the heater. This indicator will be on continuously while the oven heats up to
the set temperature and will then cycle on and off at the set temperature.
-Rotisserie Power Switch – This switch turns on the power to the rotisserie and is
used to start and stop the rotisserie.
-Rotisserie Speed - This knob controls the rotisserie speed. Clockwise rotation
increases speed. The oven has a nominal speed range of 4 to 20 rpm.
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