14
Operation of Single Set Point
Temperature Control
(Automatic) Models
Operation of Single Set
Point Temperature Control
(Automatic) Models
Models F62730, F62730-26, F62730-33, F62734, F62735)
This furnace controller consists of a microprocessor based
three-mode (Proportional, Integral, Derivative), single
setpoint temperature controller. The controller features pro-
grammable over temperature protection and thermocouple
break protection.
Initial Startup:
When the power switch is turned on the controller will per-
form a self-test to make sure controller is operating prop-
erly. (If all four 1’s do not light up or fails to go to “8888”
contact Thermolyne.)
Adjustment of Parameters: (See Figure 1,
page 4)
To illuminate down
▼
button, scroll button, and up
▲
button, touch anywhere on front panel.
Set Point Temperature:
Push up
▲
button or down
▼
button, to modify temperature
set point (lower digital display).
Temperature Indication:
Push scroll button once, “°C” will appear. This indi-
cates temperature measurement. (Contact Thermolyne if
control needs to be changed to °F.)
Tuning:
This control incorporates a self tuning feature which deter-
mines the optimum control parameters for the best tem-
perature accuracy.
Push scroll button until “tunE” appears. To start tun-
ing function push
▲
button. To stop tuning function push
▼
button.
NOTE
The temperature control in these models is a
single set-point device. By using the “up” or
“down” push buttons a specific temperature can
be chosen. The control will cause the furnace
chamber to heat to the chosen temperature and
hold it at this temperature until you turn off the
power switch or select another temperature.
NOTE
When performing the following steps remember
that if more than eight to ten seconds elapse be-
fore the buttons are used again, the display
screen will automatically switch back to display-
ing chamber temperature. If this happens, light
up the front panel again and 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 al-
tered. Holding down on the scroll button allows
longer viewing time.
CAUTION
Do not exceed limitations for continuous or in-
termittent operating temperature shown in the
General Specifications. Exceeding these limits
will result in severely reduced heating element
life.
