Thermo Scientific F30400, Installation And Operation Manual

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8 Segment & 4x16 Segment Programmable Models w/OTP
Gain Scheduling
Thermo Scientific Large Tabletop Muffle
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Tuning
The two sets of PID values can be manually set or automatically tuned. To tune automatically you
must tune above and below the transfer point G.SP. If the process value is below the transfer point
G.SP, the calculated values will automatically be inserted into the (SEt 1) set and if the process value is
above G.SP, the calculated values will automatically be inserted into the (SEt 2).
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 possible. Adaptive tuning should be used when the characteristics of a
process change due to load or setpoint changes or, in a process that cannot handle the oscillation caused
by a one-shot tune.
To tune your furnace using adaptive tuning:
1. Load your furnace with a load characteristic of those you intend to heat in it.
2. Press the PAGE button until display reads, “Atun LiSt.”
3. Press the SCROLL button until “drA OFF” is displayed.
4. Press the UP or DOWN button to select “on.”
5. Press the SCROLL button until “drA.t” is displayed.
6. Press the UP or DOWN button until the desired trigger value is achieved.