INSTALLATION
Series 65
58/103
Edition 2019-10-11
980029EB
4.9.3
Choose correct control algorithm
Select the configuration what your application needs.
System Configuration
Constant gas flow available
Constant gas flow
not available
Tv*<= 500 sec
Tv* > 500 sec
Adaptive pressure
controller
Fixed pressure controller
Fixed pressure controller
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