12
System Method of Calibration -
Recommended
This method of calibration requires an NIST calibrated
thermometer with a resolution of 0.1°C or better.
1. Select an independent temperature probe to be
placed in the load, along with the unit temperature
probe before continuing with calibration. Select the
load to be calibrated, and place on top of the hot-
plate. Place a stir bar in the mixture if stirring is
desired and available on the unit being calibrated.
Make sure to have probe plugged into the unit and
placed in the load. Also ensure that the OTP adjust-
ment on the front edge of the unit is set high enough
to allow the load to achieve the calibration tempera-
ture.
2. With the unit plugged into the appropriate power, but
not turned on yet (displays should be blank, unless
the Hot Top Warning System is indicating a hot sur-
face), enter the Service Menu by pressing and hold-
ing the POWER key. After about 3 seconds a single
beep will be heard and you may remove your finger
from the POWER key. The display will change to
OSP.
3. Rotate the center knob dial one position clockwise
and the display will read CAL. This is the calibration
menu. Press the “Heat” key under the HEAT dis-
play. The display will now read OiL. Rotate the
center knob one position and the display will read
SyS. Press the “Heat” key again to accept, and the
display will change to no. Rotate the center knob
one position to change the display to yES and press
the “Heat” key again.
4. The “Heat” key under the HEAT display will be lit,
and the displays will show the temperature at which
the unit was last calibrated. The calibration temper-
ature may be adjusted by using the center knob.
Temperature can only be selected in whole degrees
Celsius. The adjustable range is 1 – 540°C for
ceramic top units or 1 – 300°C for aluminum top
units. When the adjustment is completed, press the
“Heat” key under the HEAT display to approve the
selection.
SERVICE AND CALIBRATION
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