Holding A Program; Cancelling A Program; Tuning Your Furnace - Barnstead 30400 Operation Manual

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.

Holding a Program

To put a running program on hold, press the RUN/HOLD
button. (The HOLD light will illuminate.)

Cancelling a Program

To cancel a program, hold the RUN/HOLD button down
until the RUN and HOLD lights go off.

Tuning your Furnace

The purpose of tuning your furnace is to match the char-
acteristics of your controller to the characteristics of the
process being controlled. Good control is evidenced by:
stable, straight-line control of the setpoint temperature
with no fluctuations; No overshoot or undershoot of the
setpoint temperature; rapid restoration of the setpoint
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 loading of tuning parameters is
needed. We recommend that you tune the furnace to your
specific application to obtain the best results. To provide
the best temperature accuracy possible, use these fea-
tures 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 tun-
ing. To clear the error and restart tuning, simultaneously
press the PAGE and SCROLL buttons and follow the
steps outlined in "Autotuning."
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