2
TECHNICAL DATA
2.1
General
Performance
See Table 2
Dimensions
See Figure 3
Maximum inlet-flange temperature
100
o
C
Maximum magnetic field
5 mT
Installation category
EN61010-1, category 1
Pollution degree
EN61010-1, category 2
Equipment type
Fixed Equipment, for indoor use only
Inlet screen mesh size
Hexagonal holes, 1 mm
2.2
Pumping media
WARNING
Vent dangerous gases and gas mixtures safely. Do not expose people to these gases.
WARNING
Do not use an EXT250M to pump explosive gas mixtures as the EXT250M is not suitable
for this purpose.
CAUTION
Do not use an EXT250M to pump gases which contain more than 20% oxygen unless the
pump is gas purged.
CAUTION
Do not use the EXT250M to pump mercury vapour and do not allow mercury (for
example, from a Mcleod gauge) to come into contact with the pump. If you do, the pump
rotor may corrode and fail.
Note that concentrations of gases may be modified by the compression of the pump.
2.2.1
EXT250M without gas purge
The EXT250M is designed to pump the following residual gases normally used in high-vacuum
systems:
·
Air
·
Carbon monoxide
·
Neon
·
Ethane
·
Methane
·
Nitrogen
·
Krypton
·
Argon
·
Propane
·
Carbon dioxide
·
Helium
·
Hydrogen
·
Butane
6
EXT250M Turbomolecular Pump
