How To Adjust Gain
Chapter Six: Operation in Tuning Mode
174
How To Adjust Gain
MANUAL
TORR
TUNING
GAIN
LEFT DISPLAY
CENTER DISPLAY
RIGHT DISPLAY
This is the current valve
position expressed as a
percent of the valve
control signal output.
This example shows a
setting of 20.1% of the
valve control signal
output.
The LEAD value for the
selected recipe is shown
here.
You must select a recipe
before you can edit the
LEAD parameter.
The GAIN value for the
selected recipe is shown
here. In this example, GAIN
is the parameter which is
selected for editing.
You must select a recipe
before you can edit the
GAIN parameter.
MAIN DISPLAY
This is the pressure reading from the
gauge on the control channel.
Figure 50: Adjusting the Gain Value
Gain is a control parameter. When installed in a control loop, the 146 unit calculates an error
signal. The error signal is multiplied by the Gain setting. Thus, when the 146 unit sends out a
valve drive signal (based upon the error signal which it received), the valve drive signal is
proportional to the Gain setting and the error signal.
Gain is a real-time parameter. The new Gain value goes into effect as soon as it is adjusted with
this procedure.
1. Repeatedly press the [
DISPLAY MODE
] key until the 146 unit is in Tuning Mode.
The system responds by scrolling through modes.
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