Agilent Technologies TwisTorr 305-IC SF, User Manual

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Technical Information
Agilent TwisTorr 305-ICQ & 305-IC SF User Manual 203
Description of the TwisTorr 305-ICQ & 305-IC SF
The TwisTorr 305-ICQ & 305-IC SF consists of a high frequency induction motor driving
a turbine fitted with 9 bladed stages and 3 MacroTorr drag stages. The turbine rotates
in a counterclockwise direction when viewed from the high vacuum flange end.
The turbine is made of high strength aluminum alloy, machined from a single block.
The MacroTorr stages are in the form of three disks.
The turbine rotor is supported by permanently lubricated high precision ceramic ball
bearings installed on the fore-vacuum side of the pump.
The static blades of the stator are made of stainless steel. These are supported and
accurately positioned by spacer rings.
The MacroTorr stators are in the form of selfpositioning machined disks with
pumping channels and an opening restricted by the corresponding rotor discs.
These are made of an aluminum alloy.
During normal operation, the motor is driven at 1010 Hz.
WARNING
Always ensure the pump is receiving proper cooling during operations.
Improper cooling could result in damage to the pump.
According to the list in the following page, different P/Ns are available for:

Air cooling (air cooling kit X3500-68010 and adapter kit
X3514-68001 are recommended)

Water cooling (water cooling kit 9699337 is recommended).
The pump is protected from overheating by a thermistor mounted inside the pump.
The signal from the thermistor is continuously monitored by the pump's electronic
control unit.
If the thermistor reading exceeds the predefined maximum level threshold or it is
lower than the minimum level threshold, the 305-IC stops with 2 different error
cordes (see controller paragraph).
The pump can operate in any position but is required to be supported by the high
vacuum flange. The connection of the fore-vacuum on the side of the pump is a KF
16 NW flange (KF25 – optional.