Agilent Technologies 5975T LTM GC/MSD, Руководство по устранению неисправностей и техническому обслуживанию

Страница: 187 / 270

Vacuum System
12
Troubleshooting and Maintenance Guide 187
The standard foreline pump is a two-stage rotary-vane pump.
An optional dry pump is also available. The pump turns on
when the instrument power is turned on. The foreline pump has
a built-in antisuckback valve to help prevent backstreaming in
the event of a power failure.
The foreline pump can be placed on the bench beside the
instrument (with the exhaust outlet to the rear) or on the floor
below the instrument.
An oil trap (not shown) is available for the standard wet pump
that can be used to filter pump oil out of the foreline pump
exhaust. This trap stops
only pump oil. Do not use the trap if
you are analyzing toxic chemicals or using toxic solvents.
Instead, install an 11-mm id hose to remove the exhaust from
your lab.
A window (sight glass) in the front of the standard foreline
pump shows the level of the foreline pump oil. There are two
marks next to the window. The level of the pump oil should
never be above the upper mark or below the lower mark. If the
level of pump oil is near the lower mark, add foreline pump oil.
WA R N I N G
The oil trap supplied with the standard foreline pump stops only
foreline pump oil. It does not trap or filter out toxic chemicals. If
you are using toxic solvents or analyzing toxic chemicals, remove
the oil trap and install a hose to take the foreline pump exhaust
outside or to a fume hood.
C A U T I O N
Do not place the foreline pump near any equipment that is sensitive
to vibration.
C A U T I O N
The ballast control knob controls the amount of air allowed into the
pump. Keep the ballast control closed (fully clockwise) at all times,
except when ballasting the pump.