Barnstead 47900 Operation Manual page 15

Note
Furnace must be at ambient
temperature before starting a tune.
Note
Tune has completed when "tunE"
stops flashing on display.
S S M
INGLE ETPOINT ODELS
Tuning
This controller incorporates a self-tuning fea-
ture which determines the optimum control
parameters for the best temperature accuracy
with your load and setpoint. Use this feature
the first time you use your furnace and each
time you change either your setpoint or the
type of load you are heating.
Barnstead|Thermolyne recommends you use
this feature to provide the best temperature
accuracy the controller can attain. To use the
tuning feature:
1. Adjust the setpoint to your desired
2. Press the PAGE button until display
3. Press the SCROLL button. Display
4. Press the UP or DOWN button to
5. Simultaneously press the PAGE and
6. The controller will then turn the heat-
7. Tuning will be complete after two
8. Normal control function will resume
& S S
INGLE ETPOINT
value.
reads, "Atun."
will read, "tunE."
select, "on."
SCROLL buttons to return to the
HOME DISPLAY. The display will
alternately flash between "tunE" and
the HOME DISPLAY while tuning is in
progress.
ing on and off to induce an oscillation.
When the measured value reaches
the required setpoint the first cycle will
end.
oscillation cycles and then the tuner
will turn itself off.
after the controller calculates tuning
parameters.
M /OTP
ODELS W
15