3-6
Brooks
®
Models 0152/0154
Section 3 Operation
Installation and Operation Manual
X-SE-0152-0154-eng
Part Number: 541C052AAG
March, 2008
3-7 Using the Valve Control Function
With the Valve Control function or Valve Override function, the valve of the
connected Mass Flow Controller can be opened, to purge the system, or
closed, to shut off the system, independent of the setpoint value. After
pushing the
“Valve Control”
key a “V” appears on the display of the active
channel.
After this “V” one of the following characters (+, - or 0 ) is displayed to
indicate the possible functions. By pressing the “Valve Control” key again
the other characters are shown.
V0 = Valve Override disabled (Control mode)
V+ = Valve Override open
V- = Valve Override close
After confirmation with “Enter” the following is displayed:
V+ opens the valve to purge the system. V- closes the valve and shuts off
the flow. After confirmation of V0, the Valve Override function will be
disabled and the valve is again controlled by the Mass Flow or Pressure
Controller itself.
The setting of the Valve Override function is memorized. After power up the
memorized Valve Override function is active again.
The external Valve Control function can be used for overruling the internal
0152/0154 Valve Control funtion ( Valve Override open and close). Each
channel can be controlled seperately. Valve Override open of the different
channels can be activated externally by connecting one of the valve control
inputs to resp. the +15dc or +24Vdc ( depending on the model resp. ±15V
or +24V). Valve override close can be activated by connecting one of the
Valve Control inputs to the -15V or gnd ( also model dependant) pins of
the connector.
