Specifications

(4 Ramp & 4 Dwell)
F6020C-33-60-80, F6020C-33-80, F6020C-60-80,
F6020C-80, F6028C-60-80, F6028C-80
This controller consists of a microprocessor based three-
mode (Proportional, Integral, Derivative), programmable
temperature controller with “Fuzzy” logic capability, pro-
grammable over-temperature protection and appropriate
output switching devices to control the furnace. The digital
readout continuously displays chamber (upper display)
and set point (lower display) temperatures unless the
“SEL” button is depressed.
The programmable control can be used as a single set
point control or as a programmable control.
Single Set Point Operation
To use as a single set point control simply push “UP” or
“DOWN” button to choose a specific temperature.
1. The set point temperature presently set in the
control will be read out on the lower display
2. To change this set point, depress the “UP” or
“DOWN” button until the desired set point value
is displayed, then release the button.
3. At this point, the furnace will begin to heat if the
new set point temperature you have chosen is
higher than the present chamber temperature.
Programmed Operation
Control Parameters
You can gain access to the control parameters by holding
the “SEL” button depressed for about 3 seconds. “LoCt”
will be displayed in the upper display.
Depressing “SEL” once again shows the next parameter
and its current value on the display. The parameter value
can either be modified with the buttons or left unmodified.
Pressing the enter button (>) will allow you to modify the
current value using the “Up” and “Down” buttons. Press
18
Programmable Control Models
Warning
To avoid electrical shock, this furnace
must have the door switch operating
properly.
Note
For optimum control of a single set
point operation, set the “CTrL” parame-
ters to “FUZY” to take advantage of
the controller’s fuzzy logic capabilities.
Note
The furnace will begin to heat to the
current set point temperature when you
turn the power switch ON.To examine
the control parameters without heating
the furnace, depress and hold the
DOWN button until the set point (lower)
display reads “20.”
Note
When examining the parameters, if you
depress and release either the “SEL,”
“UP” or “DOWN” buttonbottom and
more than 1 minute elapses before the
buttons are used again, the display
screen will automatically switch to dis-
playing chamber temperature. If this
happens, you will have to step through
each parameter until you reach the
point at which the interruption
occurred. The parameter values you
checked earlier, however, will not be
lost or altered.