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OPERATION
Series 613
92/149
Edition 12.08.2022
984360EC
6.3.2.2
Choose correct control algorithm
System Configuration
Constant gas flow available
Constant gas flow
not available
Tv*<= 500 sec
Tv* > 500 sec
Adaptive
PI
PI
Soft Pump
Soft Pump
* Use the formula below to define the applicable pressure control algorithm.
q
L
gasflow for learn [mbarl/s]
p
SFS
sensor full scale pressure [mbar]
Tv*
Vacuum time constant [sec]
CV
Chamber Volume
[l]
P
SFS
•
CV
Tv =
q
L
Upstream
Process
chamber
Control
valve
Pump
Downstream
Process
chamber
Control
valve
Pump