Agilent Technologies TwisTorr 305 FS User Manual page 233

Technical Information
This menu contains all the parameters that have a direct effect on driving of the
pump.
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:


VENT VALVE MODE: makes it possible to select driving of the vent valve




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.
Agilent TwisTorr 305 FS Remote Controller User Manual
ALWAYS ON: the cooling fan is always ON
SERIAL: the cooling fan is controlled directly via the serial port.
AUTO TIME: the valve is controlled by the controller
MANUAL: the valve is controlled by the serial port.
AUTO PUMP SPEED: the valve is controlled by the controller, by taking into
account the pump's deceleration.
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