18
CSS450 Controller
LNP95
Instrument Bus
Cable
Main cable power socket
Cryo-CSS450 System
Connecting the Liquid Nitrogen
Pump for Cryo-CSS450 System
Note: this is only appropriate if you have pur-
chased the Cryo-CSS450 system. If not then go
to the section, “Setting up the Linksys32 Soft-
ware”, page 18.
A Cryo-CSS450 system adds liquid nitrogen
cooling functionality to the CSS450 stage. A dual
output LNP95 Liquid Nitrogen Cooling Pump, 2L
Dewar, power cable and I2C cable will be includ-
ed as additional parts.
Connecting the LNP95
Connect the CSS450 Controller as described on
page 14 of this manual and connect the Instru-
ment Bus cable from the CSS450 controller to
either one of the two Instrument Bus sockets on
the LNP95.
Fill the 2L Dewar with liquid nitrogen to approxi-
mately 2/3 thirds full and replace the lid.
DO
NOT FASTEN
the clips on str aight away (r ead
Safety Precaution; Handling Liquid Nitrogen,
page 4 for more information). Wait until the
nitrogen has stopped boiling before fastening the
catches. Excess pressure can escape through the
Teflon cap on the lid.
There is a white plastic block on the base and on
the top of the lid. These blocks have two connect-
ors extending from them. One is for the cooling
pump (labelled LNP) and the other is for the
Dewar siphon (labelled DF2).
The CSS-LNP95 cooling pump has two silicon
tubes extending from the front panel. These tubes
end in plastic white connectors with a 3mm outer
diameter (O.D.) stainless steel side exhaust tube.
Twist and gently push these white connectors
onto the thin steel connectors on the Lid and base,
labelled ‘LNP’. The bottom LNP siphon should
connect to the base heater, and the top LNP si-
phon to the lid heater.
The Dewar siphons assembly protrude from a
large Teflon cap on the top lid of the Dewar. The
siphons are labelled ‘Lid’ and ‘Base’. A thin
black capillary tube extends from the end of each
siphon, these tubes must be carefully inserted into
the small steel connector protruding from the
white blocks and labelled DF2.
.
