How To Adjust Lead
Chapter Six: Operation in Tuning Mode
176
How To Adjust Lead
MAIN DISPLAY
This is the pressure reading from the
gauge on the control channel.
MANUAL
TORR
TUNING
LEAD
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. In this example,
LEAD is the parameter
which is selected for editing.
You must select a recipe
before you can edit the
LEAD parameter.
The GAIN value for the
selected recipe is shown
here.
You must select a recipe
before you can edit the
GAIN parameter.
Figure 51: Adjusting the Lead Value
The Lead parameter creates a valve drive signal that is proportional to the rate of change of the
controlling sensor’s pressure reading. That is, the Lead value provides anticipation in the
system, allowing set point to be reached more quickly.
Lead is a real-time parameter. The new Lead 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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