Thermo Scientific BF51634BC-1, Installation And Operation Manual

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Communication Option
Auto Tuning the Controller
7-8 Thermo Scientific
7. Press the arrow buttons to select the new Down Ramp Rate value, °C in per
minute or °F per minute, or “oFF”. Press and release SET/ENT to register the
value change.
8. Press and hold SET/ENT for three seconds to exit the Setup Parameters
Menu.
9. The new Ramp Rates are now effective.
10.Follow the instructions in Section “ Setting the Temperature” to reset the
temperature setpoint.
To view the target setpoint during the ramp rate, press and release an arrow
button. The lower display will show the setpoint next to the selected target
setpoint. Return to the ramping setpoint display by pressing and releasing the
other arrow button.
Auto Tuning the Controller
Factory settings are provided for general purposes, but your process can be
enhanced through the auto tune feature. For a given process temperature and
product load, auto tuning maximizes the performance of the chamber by operating
with the quickest response and minimal temperature overshoot.
To auto tune the controller.
11. Load the chamber with materials that have the same mass and thennal
characteristics as a typical product load.
12.Operate the chamber to the process temperature.
13.Press and hold SET/ENT for 3 seconds to display the A1 parameter of the
Operating Parameter menu.
14.Press and release SET/ENT to show the At parameter.
15.Press and release the arrow buttons to show on in the lower display.
16.Press SET/ENT once to enter the auto tune mode and exit the Operating
Parameters menu.
The ramp rate begins when the SET/ENT button is pressed after
the target setpoint is selected. The setpoint display on the
controller will show the changing setpoint at the selected ramp
rate.