Edwards nEXT400 User Manual

2. Introducon
The units used in the manual c
onform to the SI internaonal system of units of
measurement where applicable US equivalent units of measurement are given. When
ow rates are specied, the abbreviaon ‘sccm’ is used to mean
standard cubic cenmetres per minute. This is a ow of 1 cm
3
min
-1
at an ambient
temperature of 0 °C and a pressure of 1013 mbar (1.013 x 10
5
Pa).
2.1 Overview
WARNING: SAFE EQUIPMENT USE
Risk of injury or damag
e to equipment. Improper use of the equipment can cause
damage to it or injury to people. The user is responsible for the safe operaon,
installaon and monitoring of the system.
WARNING: ELECTROLYTIC CAPACITORS
Risk of asphyxiaon. The driv
e contains electrolyc capacitors and, under certain
fault condions, may emit dangerous fumes. Ensure that the drive is operated in a
well-venlated area.
CAUTION: ELECTRICAL CONNECTIONS
Risk of damage t
o equipment. Do not aempt to separate the controller from the
pump since this will cause damage to the electrical connecons.
A nEXT pump has a turbomolecular pump with a permanently aached controller which
have drive electronics.
The controller controls the electrical supply to the pump with the excepon of standby
speed control. The controller has no manual controls and can be operated through the
logic interface only. To operate the nEXT pump, connect it to the customer control
equipment and power supply or use the manufacturer's TIC Turbo Instrument Controller
or TIC Turbo Controller.
The controller drives the brush-less d.c. motor in the pump. Three variants of the nEXT
pump are:
▪ The 'S' or 'Simplex' variant which has turbomolecular blades.
▪ The 'D' or 'Duplex' variant which has turbomolecular blades and a drag mechanism
that allo
ws operaon at higher backing pressures than the pure turbomolecular
pumps.
▪ The 'T' or 'Triplex' variant which has turbomolecular blades, a drag mechanism and
a regenerave mechanism. The regenerave stage gives the opon to ulise
'boost' mode.
An 'iD' or 'iT' interstage variant gives an interstage port between the turbomolecular
blades and drag mechanism. For SEM and TEM applicaons, an 'L' variant is available
which oers lower vibraon and stray magnec eld emissions.
04/2022 - ©Edwards Limited
Page 11B80000880_G
B80000880_G - Intr
oducon

Edwards nEXT400 Specifications

General

Brand	Edwards
Model	nEXT400
Category	Water Pump
Language	English