Specifications

how far the furnace chamber temperature can rise above
your set point. We recommend a setting of 20; since a
P.I.D. control process involves some degree of temper-
ature overshoot, a setting of less than 20 may interfere
with the function of your controller.
LooP - Thermocouple break alarm detection time. For
proper operation of your furnace, this parameter should
be set to “0.00”. If it is not, set it to “0.00”.
CTrL - Control type. Push the “Up” or “Down” buttons to
set to “Pid” or “FUZY”. Programmed operation requires
P.I.D. control. Single set point operation will achieve bet-
ter control using Fuzzy logic control.
Programming Controller
This controller allows you a maximum of 4 ramp and 4
dwell segment combinations, thus enabling 4 different set
point levels to be achieved. Each ramp is programmed by
specifying the ending temperature level and the required
time to ramp to that temperature. The controller then
automatically calculates the ramp rate required to attain
the ending temperature level based on the desired ramp
time. Dwell segments then can be attached to each tem-
perature level to hold that temperature for a specified
amount of time.
To run a program, first determine your ramp times, ending
temperature levels and dwell times. It is helpful to graph
your program out for ease of loading the program into the
controller.
Make sure “ProG” (program options) is set to “oFF” (to
stop the program) when entering program values.
Push “SEL” button until “Sü-1” is displayed. Push the En-
ter button (>) to select the current value. Push “UP” or
“DOWN” button and set Set point 1 in °C. Push the Enter
button to enter the set value as the current value.
Push “SEL” button until “TN1r” is displayed. Push the En-
ter button (>) to select the current value. Push “UP” or
“DOWN” button and set Ramp time 1 in hours and min-
utes in the format “X.XX” (hour.minutes). This is the time
Ramp 1 will take to reach Set point 1. Push the Enter but-
21
PROGRAMMABLE CONTROL MODELS
Caution
Remember that whenever the power
switch is turned ON, the furnace will
begin to heat at the set point tempera-
ture that was previously set. This
value will remain unchanged for up to
a year without power being supplied to
the control.
Note
If you desire to skip a ramp or dwell
segment, follow this procedure: For a
dwell segment, enter a setting of “0”
minutes; for a ramp segment, enter a
setting of “00.00” hour.minutes. This
will cause the controller to skip to the
next segment as fast as the furnace
can heat or cool down.