Operation - Shel lab FX14-2 Installation And Operational Manual

OPERATION

6.1 Connection to Power Supply: Assure that the electrical power supply is properly configured
and rated for the oven. The FX28-2 must be hard wired as stated in Section 3.0, Installation.
6.2 Push the POWER switch to the ON position. The digital temperature display will indicate a
temperature value.
clockwise, by using a flat-head screwdriver.
6.3 Set Main Temperature Controller: Enter desired set point temperature. To enter set point mode
on the controller, press either the Up or Down arrow pad one time. The digital display will start to
blink, going from bright to dim. While blinking, the digital 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 temperature of the unit. Note that the
High Limit Thermostat should be turned to its maximum position until the unit has stabilized at
desired set point temperature. Allow the oven at least 24 hours to stabilize.
6.4 Calibration:
environment and has been stabile at set point for several hours. Place a certified reference
thermometer in the chamber by either placing it directly inside, or through the access tube at the
top left of the unit.
temperature to stabilize again until the thermometer reads a constant value for one hour.
Compare the digital display with the reference thermometer.
difference, put the display into calibration mode by pressing both the Up and Down arrow pads at
the same time until the display begins to flash. While the numbers are flashing the display can be
calibrated by pressing the Up or Down arrow pads until the display reads the correct value. Allow
the oven temperature to stabilize again, and recalibrate if necessary.
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 Overtemperature Safety Thermostat: As mentioned in step 6.3, the Safety Thermostat
should be initially set to its maximum position to allow the unit to stabilize. Once the oven is
stabile at the desired set point, turn the Safety Thermostat counterclockwise with a flat-head
screwdriver until the OTP light turns ON. Next, turn the Thermostat clockwise just until the OTP
light turns OFF. Then turn the thermostat clockwise two (2) of the smallest divisions on its scale
past the point where the light went out. This sets the Safety Thermostat at a temperature
approximately 10C above the Main Temperature set point. Note that the Safety is in series with
the output from the control relay, and the OTP light will be blinking when the Main Temperature
Controller is calling for heat.
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.
Turn the Overtemperature Safety Thermostat to its maximum position,
Temperature calibration is done once the unit is installed in its working
Be certain the thermometer is not touching any shelving.
Hour Function: Press and hold the RESET pad until the digits start blinking and
a blinking decimal point is 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).
6
Section
Allow the
If there is an unacceptable
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