Edwards nEXT nEXT85 - Pumping Media

power supply seng. If serial communicaon is available, the power limit seng of the
pump can be selected.
Refer to Table: Logic interface technical data on page 25 for the maximum power limit
sengs for the pumps. If the rapid cycling of the pump is necessary for an applicaon,
you can get faster rate of increase in the pump speed if the power supply supplies higher
current, up to a maximum in accordance with Table: Logic interface technical data on
page 25.
If the power limit seng is not adjustable, use a power supply capable to supply
sucient current to meet the manufacturer's factory default power limit seng shown
in Table: Logic interface technical data on page 25.
3.7 Pumping media
WARNING: DANGEROUS GASES
Risk of asphyxiaon. Release the dangerous gases and gas mixtures safely. Do not
expose people to the gases. Pump the hazardous gases or vapour as per safety
recommendaons given by supplier.
WARNING: PYROPHORIC OR EXPLOSIVE GASES
Risk of explosion. Do not use the nEXT pump to pump pyrophoric or explosive gas
mixtures as the pump is not applicable for this purpose. The pump and its
connecons are not designed to contain an explosion.
WARNING: DANGEROUS GASES
Risk of damage to equipment. In the interstage and booster versions of the
nEXT pumps, gas pumped through the interstage port will mix with gas pumped
through the pump inlet. Make sure that the gases do not react or combine to form
dangerous gases and substances.
WARNING: VACUUM EXPOSURE
Risk of injury. Do not expose the part of the human body to the vacuum.
WARNING: MERCURY VAPOUR
Risk of damage to equipment. Do not use a nEXT pump to pump mercury vapour. Do
not allow mercury (for example, from a McLeod gauge) to come into contact with the
pump. If mercury vapour is pumped, the pump rotor can corrode and fail.
CAUTION: CONDENSABLE GASES
Risk of damage to equipment. Do not use the pump to pump parculates or
condensable media. Deposion can occur in the pump which will degrade the pump
performance and decrease the pump life.
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B8G000880_D - Technical data