Display
The Fisher 800 Series Programmable Ovens are
equipped with a digital PID control routine that gives pre-
cise temperature controlability. The control is capable of
storing multiple 24-step programs for ramp and soak pro-
filing.
The following sections briefly describe the locations and
functions of various display fields and keypad controls.
More detailed descriptions are provided, when required,
in the operating sections of the manual.
The 800 Series controller features two bright, one-half
inch, 7-segment LED displays used in setting up the oven
program or reading oven temperature. Two smaller LEDs
indicate, respectively, an alarm condition or when power
is being applied to the oven heaters. Each display field is
discussed separately below.
Controls
Heat
Indicator
Program Run Indicator
Set Display
Alarm
Indicator
Actual
Display
Figure 1: Display Fields
Set Display
In the Control and Ramp and Soak modes, shows the oven set temper-
ature. During setup and programming, indicates control parameters to be set.
Actual Display
In the Control and Ramp and Soak modes, shows the actual oven
temperature. During setup and programming, indicates the numerical value assigned
to the currently displayed control parameter.
Heat Indicator
Lights when power is being supplied to the oven heater.
Alarm Indicator
Lights if the actual oven temperature exceeds the alarm tempera-
ture. The alarm temperature is factory-adjusted to be 5°C above the set temperature.
Run Indicator
Indicates a ramp and soak program is running. This indicator is off
during control or program editing modes.
7
Summary of Contents for Isotemp 800 Series
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