Watlow Series 935A Bedienungsanleitung PDF herunterladen (Seite 15)

Watlow Series 935A User’s Manual 13

Set the PID Menu Values

• Proportional Band, Heat and Cool [Pb`h] and [Pb`c]: Select a value (degrees) to set up band on either side (±) of the

Primary Set Point in which the heat and/or cool proportioning function(s) will be active.

For on/off control, set [Pb`h] or [Pb`c] = 0.

Range: 0 to 999°F/555°C, or 0.0 to 999.0°F/555.0°C

Default: 25°F/17°C, or 25.0°F/17.0°C

• Hysteresis, Heat and Cool [hYSh] and [hYSc]: For use with on/off control only. Select the value (degrees) for the process vari-

able change required to re-energize the control heat and/or cool output.

For ON/off control, set [Pb`h] or [Pb`c] = 0.

Range: 1 to 999°F/555°C, or 0.1 to 999.0°F/555.0°C

Default: 3°F/2°C, or 3.0°F/2.0°C

• Cycle Time, [Ct`h] and [Ct`c]: Select the value (seconds) required for the heat and/or cool output(s) to complete a full ON

through off cycle.

Range: Switched dc/Solid State Relay: 0.1 to 60.0 seconds

Default: 5.0 seconds

Range: Electromechanical Relay: 5.0 to 60.0 seconds

Default: 30.0 seconds

• Dead Band [``db]: Dead Band adjusts the effective cool set point above the primary set point by the Dead Band value in de-

grees. This creates a band between the heating and cooling proportional bands where only integral and derivative activity will

occur. For more information on Dead Band fine tuning, go to p. 33.

Range: 0 to 999°F/555°C, or 0.0 to 999.0°F/555.0°C

Default: 0°

• Integral [``It]: Select a value (minutes/repeat) for the integral function. Integral is the inverse of Reset; It(value) =

1/Reset(value).

Range: 0.00 to 99.99 minutes/repeat

Default: 5.00 minutes/repeat

• Derivative [``dE]: Select a value (minutes) for the derivative function.

Range: 0.00 to 9.99 minutes

Default: 0.00 minutes

• Calibration Offset [`CAL]: Eliminates the difference between the displayed process temperature and the actual process temper-

ature value.

Range: -999 to 9999°F/C, or -99.9 to 999.9F/C

Default: 0°

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Watlow Series 935A Bedienungsanleitung Seite 15