Agilent Technologies TwisTorr 74FS AG Rack Bedienungshandbuch Seite 264

17 Technical Information
Programming
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EXTERNAL FAN CNF: Makes it possible to select driving
mode of the external cooling fan. Possible options:
ALWAYS ON: the cooling fan is always ON
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OFF_LIMPOWER: 10 seconds after the pump has
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reached NORMAL status, the fan is switched off and the
driving power of the pump is reduced to 50 W
SERIAL: the cooling fan is controlled directly via the
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serial port.
VENT VALVE MODE: makes it possible to select driving of
the vent valve
AUTO TIME: the valve is controlled by the controller
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MANUAL: the valve is controlled by the serial port.
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AUTO PUMP SPEED: the valve is controlled by the
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controller its king into account the pump's deceleration.
VENT VALVE DELAY: Sets the delay, expressed in seconds,
between stopping of the pump and opening of the vent valve.
VENT VALVE OPEN TIME: sets the time, expressed in
seconds, of opening of the vent valve. Enter 0 if the valve is
to be kept open indefinitely (until the next start).
LOAD GAS TYPE: selects the type of gas used in the
process. Therefore, the controller limits the power supplied
to the pump according to the setting of this parameter.
WATER COOLING: indicates whether the pump is cooled
with water or not. The controller limits the power supplied
to the pump according to this setting.
ACTIVE STOP: enables (YES) or disables (NO) active
braking.
STOP SPEED READING: enables (YES) or disables (NO) the
pump rotational frequency reading function also during the
slowing phase that follows a stop command
TwisTorr 74 FS AG Rack Controller User Manual / 87-901-055-01