FEI Quanta FEG 250, Руководство пользователя

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System Options: Quick Loader
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vacuum level, the lever interlock is released and the gate valve can
be opened. The pump cycle is automatically terminated when the
required vacuum is reached.
• The V (vent) labeled button is pressed once to vent the loader
chamber. The vent cycle continues till the P button is pressed or it
is terminated by time-out. If the microscope chamber as well as
loader is vented then pressing the
V button release lever interlock
and gate valve can be opened.
• The indicator lamp labeled OK lights up when vacuum is reached
after pumping. When it goes out this means the wait time has been
exceeded and the appropriate vacuum for a transfer has been lost.
Pressing the
P button again will bring the system to vacuum OK
status.
Control buttons are not shining when the system is recovering from
vacuum status transition (e.g. immediately after the load/unload
sample, during venting the system...). After finishing the state
transition the control buttons will be in operation again.
Sample Carrier, Sample Gauge and Stage Adapter
A sample carriers (2 pcs.) are used to hold and transport the sample
from the loader to the specimen stage of the SDB / SEM. The carrier
sits in the stage adapter with a dovetail joint. It is fixed to the loading
rod via a bayonet coupling. The loading rod is decoupled at the
bayonet coupling when the sample carrier is located in the adapter
and withdrawn leaving the sample carrier ready for sample
observation.
The Stage Adapter is connected to the rotation base of the FEI stage
by 3 hexagonal headed screws. The base of the adapter has 3
highpoints for a firm 3-point contact to the rotation base to prevent
vibration transmission.
The height of the stage adapter is distinct to the SDB /SEM system it
is used with. The top of the adapter has a dovetail slot for the
acceptance of the sample carrier from the rod loading mechanism.
Note:
Before mounting the Stage Adapter the stage must be homed with the
chamber door opened.
Only samples that fit the Sample Gauge can be loaded. One sample
stub of diameter up to 32 mm (1 1/4 ") can be used, although standard
sizes of 25 mm and 12.5 mm can also be used. Height can be no
greater than 9 mm.
The shuttle clamps with a spring in the dovetail shaped slot of the
adapter. It is fixed to the loader arm via a bayonet coupling. The
maximum pin length of the stubs that can be used is 11 mm.
Most common commercial FEI type stubs have a pin length no greater
than 8 mm.