Oven operation – Shellab SVAC4-2 User Manual
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OVEN OPERATION
NOTE: When
starting a new oven, allow the oven to operate two hours at 150˚C. Slight vapor or smoke may occur in
the initial heat-up. This is the dissipation of protective coatings that have been added to the oven elements.
7.1
Power Connection: Connect the service cord to a grounded outlet if supplied with a detachable cord set.
Switch the unit to the ON position.
7.2
Turn the Set Over Temperature control to its maximum position (clockwise).
7.3
Setting the Main Temperature Control
Video is also available for
instructions “Quick Start-Shel lab Vacuum Oven Basics.”
To set the main temperature controller, perform the following steps:
1.
Turn the power switch to the ON position. The Power ON Light will illuminate along with the Watlow PM
Control.
2.
Make sure the control is not running a program. If the Ramp Symbol is illuminated on the right side of the
display, that means there is a program running. To turn off the program, push the EZ Key once. The
Ramp Symbol should go off, indicating the program has ended. Enter the desired set point.
7.4
Calibrating the Main Temperature:
It is recommended that calibration is done once the unit is installed in its working
environment. The unit should be stable at set point for several hours and under vacuum. Once unit has been stable for
several hours, compare process display with reference thermometer. After comparing the two figures out the
calibration offset by subtracting the reference thermometer reading to the display reading. If the reference is greater
than the display, it will be a positive number. If the reference is smaller than the display, it will be a negative number.
EXAMPLE:
REFERENCE
THERMOMETER
PROCESS
DISPLAY
OFFSET
CAL
152°C
150°C
2
148°C
150°C
-2
Once the Offset Calibration Number is established, it can then be entered into the control. To enter into the
control, push and hold both UP and DOWN Arrow Button simultaneously for three (3) seconds or until A1
appears in the Upper Display and Oper appears in the Lower Display. Then, push the Advance Key
repeatedly unit I.CA appears in the Bottom Display and a number value in the Upper Display. This number
value can be changed by using the UP or DOWN Arrow Buttons. Change the number value to the Offset
Calibration Number established earlier. If it is a negative number, you subtract. If it is a positive number,
you add. Once the Offset Calibration Number is entered, push the Infinite Button repeatedly to exit to Home
Page. (Process Temperature Display Top and Set Point Display Bottom.)
Section
7