Barnstead 47900 Operation Manual page 37

8 S & 4 16 S
EGMENT X
Autotuning
The Autotune feature automatically sets up the
PID values in the control parameters to suit new
process conditions.
To tune your furnace using autotuning:
1. Load your furnace with a load similar to
your normal load and close the door.
2. Set the setpoint temperature.
3. Press the PAGE button until the display
reads, "Atun LiSt."
4. Press the SCROLL button until "tunE
OFF" is displayed.
5. Press the UP or DOWN button to select
"on."
6. Simultaneously press the PAGE and
SCROLL buttons to return to the HOME
DISPLAY. The display will flash "tunE"
while tuning is in progress.
Adaptive Tuning
Adaptive tuning continuously evaluates tuning
parameters. Adaptive tuning automatically
installs new values if better accuracy is possi-
ble. Adaptive tuning should be used when the
characteristics of a process change due to load
or setpoint changes or, in a process that can not
handle the oscillation caused by a one-shot
tune.
To tune your furnace using adaptive tuning:
1. Load your furnace with a load character-
istic of those you intend to heat in it.
2. Press the PAGE button until display
P
EGMENT ROGRAMMABLE
M /OTP
ODELS W
37