Agilent Technologies TwisTorr 305 FS User Manual page 154

8 Technical Information
Programming
This menu contains all the parameters that have a direct effect on driving
of the pump.
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HIGH SPEED: Sets (in Hz) the speed of rotation of the pump when the
low-speed function is not active.
LOW SPEED: Sets (in Hz) the speed of rotation of the pump when the
low-speed function is active.
SOFT START: enables (YES) or disables (NO) the soft start function.
This parameter is visible only if the controller is configured in FRONT
mode.
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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SERIAL: the cooling fan is controlled directly via the serial port.
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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 controller, by
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taking 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, combined with the pump
body temperature. Please always set up the LOAD GAS TYPE in
accordance to the gas type used in the process. An improper
selection of this setting could result in the damage of the pump.
TwisTorr 305 FS Remote Controller User Manual / 87-901-059-01