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the SCROLL button until “IdHi” appears on the display.
Press the UP or DOWN button to select the OTP value
you desire. We recommend a value of 20° above your
working temperature to provide protection for your work-
load.
Tuning
This controller incorporates a self-tuning feature 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 fea-
ture:
1.
Adjust the setpoint to your desired value.
2.
Press the PAGE button until display reads,
“Atun.”
3.
Press the SCROLL button. Display will read,
“tunE.”
4.
Press the UP or DOWN button to select, “on.”
5.
Simultaneously press the PAGE and SCROLL
buttons to return to the HOME DISPLAY. The
display will alternately flash between “tunE”
and the HOME DISPLAY while tuning is in
progress.
6.
The controller will then turn the heating on and
off to induce an oscillation. When the mea-
sured value reaches the required setpoint the
first cycle will end.
7.
Tuning will be complete after two oscillation
cycles and then the tuner will turn itself off.
8.
Normal control function will resume after the
controller calculates tuning parameters.
Note
Furnace must be at ambient
temperature before starting a tune.
S
INGLE
S
ETPOINT CONTROLLER
Note
Tune has completed when “tunE”
stops flashing on display.
Note
“Stat” and “Sp.rr” in Sp list must be
set to OFF or “tunE” will not initiate.
