Keypads; Circulating Fan (Model 750 Only) - Fisher Scientific 650 Series Instruction Manual

Keypads

The 650/750 Series incorporates a four-key, tactile key-
pad. The function of each key is discussed individually
below. See Fig. 1 for keypad locations.
During programming or setup, successively
MENU
pressing the MENU key causes the controller
display to sequentially step through menu selec-
tions.
In Control mode, pressing the UP Arrow key,
increases the furnace set temperature, as indi-
cated on the Set display. During programming or
setup, used to step through menu options.
In Control mode, pressing Down Arrow key,
decreases the furnace set temperature, as indi-
cated on the Set display. During programming
or setup, used to step through menu options.
Pressing the RUN key alternates muffle furnace
RUN
operation between the Control and Ramp and
Soak modes.
Circulating Fan
Just above and to the left of the Actual Display is the
power switch for the Circulating Fan. When turned on,
outside air is circulated through the bottom of the furnace
chamber under the hearth, were it is heated, and into the
furnace chamber. Two to four air changes per hour can
be expected with the fan on.
C
ONTROLS
(Model 750 only)
9