Watlow Series 935B Manual de usuario descargar pdf (Pagina 14)

14 Watlow Series 935B User’s Manual

Choosing a PID Setting Strategy

You may rely solely on the Auto-tune [`Aut] function (p. 34) and factory defaults to determine PID values for your

system, or you may use auto-tuning and additional manual adjustments. You must select dead band [``db] and

calibration offset [`CAL] values manually.

The Series 935B PID Menu is the first sub-menu you encounter after moving to the Operations Menu. The PID Menu

provides a software location to select the individual heat or cool proportional band, hysteresis, and cycle time values;

and the dead band, integral, derivative, and calibration offset values.

To go to the PID Menu:

1. Go first to the Operations Menu by pressing

. and , simultaneously for three seconds.

2. Scroll through the Operations Menu with

, until you see the [`Pid] prompt.

3. While pressing ß to display [``no], choose [`YES] with . or

4. Release ß to see the first PID prompt.

NOTE: Access to the PID Menu and the prompts there varies with lockout function and output set-up. The PID

Menu is locked out when the 935B leaves the factory.

• Lockout function; the Lockout Tag [`tAg] function masks menus from view (if you cannot see a prompt, you can

make no change).

See Using Lockout Functions, p. 20.

• Output set-up; you must choose [hEAt] or [COOL] in either Output 1 or Output 2 to have access to the PID Menu.

With a [hEAt] only choice, [COOL] prompts are not visible, and vice versa.

See the Valid Output Functions Table, p. 5, or Setting Up Inputs and Outputs, p. 22.

NOTE: Proportional Band, Integral, Derivative, Dead Band, and Calibration Offset values are adjustable in

whole or tenth °F or °C, depending on input type [``In] and [`C_F] Celsius/Fahrenheit Configuration Menu

choices.

Learn the PID Menu

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Watlow Series 935B Manual de usuario Pagina 14