Specifications

tN2S - Dwell time 2.
Sü-3 - Set point 3.
tN3R - Ramp time 3.
tN3S - Dwell time 3.
Sü-4 - Set point 4.
tN4r - Ramp time 4.
tN4S - Dwell time 4.
P-on - Power-on start. Push the “Up” or “Down” Buttons
to set to “Yes” or “No.” When set to “Yes,” your furnace
will immediately begin running the set program when you
power on your furnace. For most applications, set to
“No.”
The next three parameters - Proportional band, Integral
and Derivative - are the three control parameters of a
P.I.D. control system. The values for these parameters
are set during the tuning process. You should not change
them; doing so may cause your controller to operate
incorrectly.
P - Proportional band
i - Integral
d - Derivative
AL1T - Alarm type. This parameter determines how the
controller responds to any alarm input. It should display
“0031.” If it does not, set it to “0031.”
AL11 - Furnace over temperature alarm. This parame-
ter determines the absolute upper limit on the furnace
chamber temperature. We recommend a setting of
“1200°C” since 1200°C is the maximum temperature your
furnace can obtain without damage to furnace compo-
nents. You may wish to set the parameter lower if you
need to ensure a crucial process is protected from high
temperature.
AL12 - High deviation alarm. This parameter determines
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PROGRAMMABLE CONTROL MODELS
Note
Over Temperature Protection (OTP):
The controller is fitted with a mechani-
cal relay which is de-energized in the
alarm mode. This relay, when de-ener-
gized, removes power from the heating
elements. If the primary control circuit
fails, the OTP will control the furnace
temperature at the value you have
entered for AL11. It does not shut off
the furnace, but will maintain the
chamber temperature at that value.