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b. PRESS the Align button on the front
console to access the Alignment
Selection page. On the upper right-
hand side of the page, press Rot
Center
so
highlighted.
Now
or current
centering
performed; it is not necessary to do
both.
A. Voltage Centering
a. On the lower right-hand side of the page,
select Volt (under Rot Center Volt Curr)
so that it becomes highlighted. This will
cause the high tension to modulate (the
inner Step Size knob adjusts the
amplitude of modulation). If the chosen
feature shifts off center laterally, the
beam is not aligned along the optical axis
of the microscope and must be
corrected.
b. USE the Multifunction X/Y knobs to
stabilize the feature at the centre of the
screen, eliminating all lateral movement.
The feature should appear to be
pulsating.
c. PRESS the Algn button to return to the
TEM Brightfield page.
B. Current Centering
a. On the lower right-hand side of the page, select Curr (under rot center Volt Curr)
so that it becomes highlighted. This will cause the objective lens current to
modulate (the inner Step Size knob adjusts the amplitude of modulation). If the
chosen feature shifts off centre laterally, the beam is not aligned along the optical
axis of the microscope and must be corrected.
that
it
becomes
either voltage
may
be
2017.07.07
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