35
Holding a Program
To put a running program on hold, press the
RUN/HOLD button. (The HOLD light will illumi-
nate.)
Cancelling a Program
To cancel a program, hold the RUN/HOLD but-
ton down until the RUN and HOLD lights go off.
Tuning your Furnace
The purpose of tuning your furnace is to match
the characteristics of your controller to the char-
acteristics of the process being controlled. Good
control is evidenced by: stable, straight-line con-
trol of the setpoint temperature with no fluctua-
tions; No overshoot or undershoot of the set-
point temperature; rapid restoration of the set-
point temperature when external disturbances
cause deviations from the setpoint.
This controller has automatic tuning features
which install optimum tuning parameters to give
the best temperature accuracy. No manual load-
ing of tuning parameters is needed. We recom-
mend that you tune the furnace to your specific
application to obtain the best results. To provide
the best temperature accuracy possible, use
these features when you install your furnace
and whenever you change your application or
procedure.
Tuning Error
The display will flash “tu.ER” if an error occurs
during tuning. To clear the error and restart tun-
ing, simultaneously press the PAGE and
SCROLL buttons and follow the steps outlined
in “Autotuning.”
8 S
EGMENT
& 4
X
16 S
EGMENT
P
ROGRAMMABLE
M
ODELS W
/OTP
Note
Display will flash “tu.ER” if an error
occurs during tuning. To clear the
error and restart tuning, simultane-
ously press the PAGE and SCROLL
buttons and follow the steps outlined
in “Autotuning.”
Note
To stop the tuning function, simulta-
neously press the PAGE and
SCROLL buttons.
