FEI Quanta FEG 250, Руководство пользователя, Страница: 190 / 228

System Options: Heating Stage 1000 °C / Heating Stage 1500 °C
9-42
The Advanced tab
The Advanced tab is displayed only when the HS is connected to the
feed-through plate connector.
• The Auto Power check box is cleared, the Power slider becomes
active and user can apply desired power directly to the heater. The
functionality is useful when working at temps above 1300 °C, when
regulation can be affected by a sample outgassing or a leakage
current.
Caution!
The slider button shows % of maximum allowed power. Apply just
as many Watts as needed in order not to exceed 50 °C/min ramp
speed, otherwise your heater lifetime shortens.
For advanced
users ONLY.
Additional HS 1500 features
• The Bias Presets check box allows the user to apply sample and
shield bias values according to settings in the alignment procedure
150 (see below).
• The Heat Shield and Sample Bias sliders are used for the manual
sample and shield bias values setting.
• The power and biases can also be controlled via Manual User
Interface (MUI) modified knobs, which is a part of the 1500 °C
heating stage option. The MUI performance could be set in the
Preferences… / General tab, where the following line appears:
MUI knobs assignment (Default / Heating stage)
The Default setting always keeps the original functionality. The
Heating Stage setting assigns MUI knobs another functionality
when the
Temperature Control module / Heating button is
clicked. When the HS is turned off or removed, the habitual
functionality is restored (see above).
FIGURE 9-36 MUI BUTTONS NEW FUNCTIONALITY
• the Stigmator X knob change to the Power knob
• the Stigmator Y knob change to the Enhanced Contrast knob
• the Shift X knob changes to the Sample Bias knob
• the Shift Y knob changes to the Heat Shield Bias knob