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The Edit symbol is displayed in the «Source» line.
Press
to select among «
interna
l» and
«
external AI 1
»
to save the new setting and return to the
«Pressure» display.
o return to the «Pressure» display
without saving the new setting.
Selecting the controller type
The following parameter settings are only effective in the Pressure control
mode.
The CMOVE 1250 offers the automatic controller types Auto 1 to Auto 99 (proportional/
integral controller) and PID (proportional/integral/derivative controller).
Auto is best suited for fast process optimization, the PID controller type is used when good
control to a setpoint (nominal value) combined with a fast response is required.
Auto controller
Auto is adjusted according to the following principles:
•
1 = slow reaction
•
99 = fast reaction
An approximate setting of Auto can be made as a function of the volume of the vacuum
system and the pumping speed of the vacuum pump, according to the following diagram:
Figure 5-7
Example:
For a small vacuum system and a large vacuum pump, a value between 50
and 99 should be selected.
SAVE
SAVE
Source Nom val Press
Source : internal
Vacuum pump
Vacuum system
e
g
r
a
L
l
l
a
m
S
l
l
a
m
S
e
g
r
a
L
Controller type
A
9
9
o
t
u
75
50
25
1
Volume
Pumping speed
