Specifications

Models F6020C, F6020C-33, F6020C-33-60, F6020C-60,
F6028C, F6028C-60
Controls and Displays
Power Switch
Switch power switch to the “ON” position. The controller
will illuminate when power is on.
Furnace Power Indicator
The amber furnace power light will illuminate whenever
the door is closed. This light will go out only when the
door is open or when there is an over-temperature condi-
tion.
Door Safety Switch
The door safety switch removes power from the heating
elements when the door is opened. Open and close the
door a few times, note that the amber furnace cycle light
will go out while the door is open. If the furnace cycle light
does not go out while the door is open, consult the Trou-
bleshooting section before proceeding.
Control Buttons
To illuminate the “DOWN” button, “SCROLL” button, and
“UP” button, touch anywhere on the front panel.
Digital Readout
The Digital Readout continuously displays chamber
(upper display) and set point (lower display) temperatures
unless the “SCROLL” button is depressed.
Startup Display
When the power switch is turned on, the controller will
perform a self-test to make sure controller is operating
properly. (If all four 1’s do not light up or fails to go to
“8888” contact Barnstead|Thermolyne.
15
Automatic Models
Note
The temperature control in these mod-
els is a single set point device. By
using the UP or DOWN buttons, a spe-
cific 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.
Warning
To avoid electrical shock, this furnace
must have the door switch connected
and operating properly. If the furnace
power light does not go out while the
door is open, consult the
Troubleshooting section before pro-
ceeding.
Note
When performing the operations with
the controller remember that if more
than eight to 10 seconds elapse before
the buttons are used again, the display
screen will automatically switch back
to displaying chamber temperature. If
this happens, light up the front panel
again and step through each parame-
ter until you reach the point at which
the interruption occurred. The parame-
ter values you adjusted earlier, howev-
er, will not be lost or altered. Holding
down the SCROLL button allows
longer viewing time.