Pump Description - Agilent Technologies Turbo-V 2K-G Serie Manual De Instrucciones

17 Technical Information
Description of the Turbo-V 2K-G

Pump Description

The pump consists of a high frequency motor driving a turbine fitted
with 5 bladed stages and 2 Macrotorr stages. The turbine rotates in
an anticlockwise direction when viewed from the high vacuum flange
end.
The turbine rotor is supported by permanently lubricated high
precision ceramic ball bearings installed on the forevacuum side of
the pump.
The static blades of the stator are made of aluminium alloy. These are
supported and accurately positioned by spacer rings.
The Macrotorr stators are in the form of self-positioning machined
discs with pumping channels and an opening restricted by the
corresponding rotor discs. These are made of aluminium alloy.
During normal operation, the motor is fed with a voltage of 54 Vac
(between phases) three-phase at 555 Hz. To avoid rotor overheating,
an automatic power management routine is implemented in the
control unit microprocessor. The user can select (through serial line)
the gas load type between "Argon" and "Nitrogen (or lighter gases)"
with window 157 0=Argon and default 1=Nitrogen. When Nitrogen is
selected the power limit is fixed at 400 W, for Argon selection the
user must set the maximum foreseen water cooling temperature
(Twater,max) by the window 158. After these settings the controller
will operate as shown in the following diagram.
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