Shellab SGO5-2 - Manual (Page 8)

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OPERATION
6.1 Connection to Power Supply: Assure that the electrical power supply is properly configured and
rated for the oven and plug the unit cord into the receptacle.
6.2 Push the main power switch to the On position. The digital temperature display will indicate a
temperature value. Turn the Overtemperature Safety Thermostat to its maximum position,
clockwise using a coin or flat head screwdriver.
6.3 Set The Main Temperature Control: To enter the desired set point temperature, press either the
UP or DOWN arrow pad one time on the SET/TEMPERATURE digital display. The display will start
to blink from bright to dim. While blinking, the display is showing the temperature set point which can
be changed by pushing the UP or DOWN arrow pads to raise or lower the value. If the arrow pads
are not pushed within five (5) seconds, the display will stop blinking and return to read the chamber
temperature. Allow several hours for the temperature to stabilize.
6.4 Calibrate The Main Temperature Control: It is recommended that display is calibrated once the
unit is installed in its working environment and has been stabile at set point for several hours. Place
a reference thermometer through the damper tube at the top of the unit adjacent to the exhaust port.
Be certain the thermometer does not touch any shelving. Allow again for the temperature to stabilize
until five (5) consecutive readings at one minute intervals show no temperature change. Compare
the reading on the reference thermometer with the digital display. If there is an unacceptable
difference, put the display in calibrate mode by pressing the UP and DOWN arrow pads at the same
time until the decimal points blink on and off. While blinking, the display can be changed to match
the reference thermometer by pushing the UP or DOWN arrow pads to raise or lower the
temperature until the display reads the correct value. If no arrow pads are pressed within five (5)
seconds the display will revert to displaying the temperature within the chamber.
NOTE: Temperature accuracy should be checked at least monthly or after the unit has been turned off for
an extended period of time.
6.5 Set The Overtemperature Safety Thermostat: The Overtemperature Safety should be initially set
to its maximum position when stabilizing the set point temperature. Once the oven is stabile at the
desired set point, turn the Overtemperature Safety counterclockwise (using a coin or flat-head
screwdriver) until the OTP light comes on. Next turn the Safety clockwise just until the OTP light
goes off. Then turn the Safety clockwise two (2) minor increments on its scale past the point where
the light went out. This sets the Overtemperature Safety Control at approximately 10

C above the
Main Temperature set point.
6.6 Set Timer Display: Turn the timer switch to the ON position. The SET/TIMER display digits will
light with no lighted decimals showing (See Figure 2). Note that, if during any of the following steps,
several seconds elapse with no arrow pad or reset pad activity, the timer will default to the present
displayed setting and it will be necessary to restart all functions over again. The values must be
programmed in a consecutive manner with no delays between settings or the default will occur.
A. Hour Function: Press and hold the RESET pad until the digits start blinking and a blinking
decimal shows between digits 2 and 3. In this mode, pressing the UP or DOWN arrow pads
increases or decreases the whole hour value from 0 to 99 (digits 1 and 2).
B. Ten Minute Function: After the correct value for hours is set, push the RESET pad again.
The blinking decimal will now move one digit to the right between digits 3 and 4. Pushing
the UP or DOWN arrow pads will increase or decrease the ten minute function allowing
Section
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