Erwin Sabio
Philips CM12 Alignment & Setup Manual
Page 8
3. Start saturating the filament by slowly turning the
Filament Knob [
18
] clockwise. Each click raises the
level by one with a wait time of 5 seconds between each
step.
Figure 8
The green beam seen at the
viewing screen represents visually the
beam of electrons.
4. As the filament saturation is being adjusted, check the
green beam on the large screen inside the viewing
chamber [
7
]. The brightness of this beam indicates the
relative intensity of the actual electron beam. Turn the
filament knob to reach just enough brightness of the
beam. Turning the knob above the FIL LIMIT will not
increase the brightness of the beam.
