MKS 146C - How to Adjust Lead; Figure 51: Adjusting the Lead Value

How To Adjust Lead Cha
p
ter Six: O
p
eration in Tunin
g
Mode
176
How To Adjust Lead
MAIN DISPLAY
This is the pressure readin
g
from the
g
au
g
e 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 si
g
nal output.
This example shows a
settin
g
of 20.1% of the
valve control si
g
nal
output.
The LEAD value for the
selected recipe is shown
here. In this example,
LEAD is the parameter
which is selected for editin
g
.
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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