4 DESCRIPTION OF CONTROLS
EM210F-1
4-5
PLA switch:
Used to vary the projector lens deflector coil current
when shifting the diffraction spot or specimen image.
COND STIG switch:
Used to adjust the condenser lens stigmator coil current
when performing the condenser lens astigmatism correc-
tion.
OBJ STIG switch:
Depressing this switch supplies the current stored in the
selected memory to the objective lens stigmator coil and
the current can be adjusted using the SHIFT and
DEF/STIG knobs becomes. Used to correct the objective
lens astigmatism correction.
DARK TILT switch:
Depressing this switch supplies the current stored in the
selected memory to the condenser lens beam deflector
coil and the current can be adjusted using the SHIFT
DEF/STIG knobs. Used to tilt the electron beam when
observing dark field images.
BRIGHT TILT switch:
Depressing this switch supplies the current stored in the
selected memory to the condenser lens beam deflector
coil and the current can be adjusted using the SHIFT
DEF/STIG knobs. Used to tilt the electron beam when
observing dark field image.
NTRL switch:
Depressing this switch brightens the built-in lamp and
clears the current data stored in the memory correspond-
ing to the selected switch.
⑥
BRIGHTNESS knob
Converges and spreads the electron beam.
⑦
BRIGHTNESS CRS switch
When this switch is depressed, the current rate per notch of the BRIGHTNESS
knob (L1-
⑥
)
is enlarged by 16 times.
⑧
SHIFT X knob
Used to shift the electron beam in the X direction by varying the condenser lens
beam deflector coil current. The condenser lens 1st beam deflector coil current is
varied when the Align-Gun is selected on the Alignment Panel for Maintenance
screen.
⑨
SHIFT CRS switch
When this switch is depressed, the current rate per notch of the SHIFT knobs (L1-
⑧
, R1-
④
)
is enlarged by 16 times.
⑩
DEF/STIG X knob
Used to vary the X current in the coil selected on the Alignment Panel for Mainte-
nance screen (
F
Fig. 4.44-
①)
.
⑪
DEF-STIG CRS switch
When this switch is depressed, the current rate per notch of the DEF/STIG knobs
(L1-
⑩
, R1-
⑤
)
is enlarged by 16 times.
