Specifications

194
Turbo-V Pump Technical Notes
Another feature of the Turbo-V bearing system is its
proprietary lubricant which has an extremely low vapor
pressure and is virtually hydrocarbon free. The use of this
lubricant in the permanently sealed bearing system ensures
clean, reliable operation without the need for any
maintenance whatsoever.
Varian T-plus
Varian T-plus (Turbo Pumps Linked User Software) is the new
communication, control and monitoring software for Varian
Turbomolecular Pumps and all other Varian products
featuring the Varian Window Serial Protocol.
With T-plus, you can simultaneously drive and control one or
more Turbo Pumps, connected to a PC through an RS232 or
an RS485 serial communication.
Automatic identification of the connected Pumps,
description of each command always on screen, and
User Interface adaptable to the Pump Status are only some
of the new features developed to make the approach
to pump settings easy and to reduce the number of steps
during pump configuration.
Moreover, special care is given to the GUI (Graphical User
Interface), to reproduce the environment of well-known User
Interfaces (such as Microsoft® Windows® applications), to
obtain a real User Friendly tool, and to reduce the user
learning time.
T-plus software features several options like Data Logging,
Chart Representation and Network Configuration, to help you
configure your Vacuum devices quickly, and to check your
vacuum system status at any time.
Exhaustive online Help is also included, providing the
user with a complete, easy to learn system, tailored to
customer requirements.
The previous software release Navigator 2.2 is included in the T-plus CD.
CE/CSA, EMC Electrical Specifications
Compliance
Compliance to these norms guarantees that there are no
limits on the use of the controllers and turbopumps in every
type of ambient, and that their use doesn’t create any kind of
disturbance to electronic units connected to the same line.
Varian’s new generation of Turbo controllers comply with the
limits given by the following norms:
EN 55011 Class A group 1
EN 61000/3/2
EN 61000/3⁄3
EN 61000/4⁄2
EN 61000/4⁄3
EN 61000/4⁄4
EN 61010-1
UNI EN 291-1
UNI EN 292-2
EN 1012-2
The MacroTorr® Concept
The Varian award winning, patented MacroTorr® design,
which was developed in 1991, is the result of the
improvement of the original design of the Gaede
molecular pump.
It is based on the idea of replacing (rather than adding)
molecular impeller disks to some turbo bladed stages.
The molecular impellers consist of a disk rotating in a channel
in which the inlet and outlet are divided by a wall.
The cross section of the channels decreases from the top to
the bottom of the pump (from high vacuum to low vacuum
or from the low pressure to the high pressure zone).
Gas molecules gain momentum after each collision with the
moving surface of the impeller.
The gas is then forced to pass through a hole to the next
stage due to the wall.
The result is a product that, with the same dimensions as a
conventional turbopump, provides: high compression ratios
for light gases and high compression ratios at high foreline
pressure. This allows the use of a very small mechanical pump
while maintaining a low inlet pressure, or the use of a dry
pump, for an oil free environment, and high throughput
capacity at inlet pressures greater than 10
-3
mbar.