FEI Quanta FEG 250, User'S Operation Manual, Page: 60 / 228

Software Control: xT microscope Control Software
4-32
Slow (tortoise / large green sector) / Fast (hare / small green sector)
preset icon indicates the matching dwell-time value. To change it
move an icon up or down just by pressing it.
Snapshot (F4) / Photo (F2) (different cameras) preset icon indicates
the matching dwell-time value. Set all possible properties in the
Property editor.
The Default button restores the default dwell-time list and preset
settings.
The Presets Tab
allows the user to change the pre-set values in the High Voltage ,
Magnification and Pressure drop down lists. A value can be
changed by selecting it in the list and entering a new one in the edit
box just below the respective title. The new value replaces the
selected one and is immediately sorted into the list. The number of
entries in the list remains fixed.
FIGURE 4-18 PRESETS PREFERENCES
The High Voltage list can be changed to span any values from 200 V
to 30 kV. The values must be entered in kilovolts (0.2 means 200 V).
The Magnification list can be changed to hold frequently used
magnifications. Values that are in the pre-set list but cannot be applied
to the actual SEM conditions are not shown in the toolbar /
Magnification list box. Magnification range is from 20× to 1 000 000×.
Note:
Alternatively the Magnification could be displayed as the Horizontal
Field Width (see the
Preferences… / General tab).
The Pressure list can be changed to hold specific values frequently
used in the Low Vacuum and ESEM modes in the range from 10 to
200 Pa (from 0.075 to 1.5 Torr).