16
Operation of 4 Ramp & 4 Dwell
Programmable Models
Models F62730-80, F62730-26-80, F62730-33-
80, F62735-80)
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
setpoint (lower display) temperatures unless the “SEL” but-
ton 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.
Operation of 4 Ramp & 4
Dwell Programmable Models
WARNING
To avoid electrical shock, this furnace must
have the door switch operating properly.
NOTE
For optimum control of a single set point opera-
tion, set the “CTrL” parameter to “FUZY” to take
advantage of the controller’s fuzzy logic capa-
bilities.
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 setpoint (lower) dis-
play reads “20”.
