Download CM20 USER GUIDE

TURNING ON HT
CRT DISPLAY
●
On VACUUM STATUS page check or wait
until IGP < 23 and VACUUM STATUS:
READY.
Once IGP < 23, press READY button to
return to main CRT page.
●
On main CRT page select PARAMETERS page
Check HIGH TENSION kV is set to 160 kV, and EMISSION is 1 or 2.
(Higher EMISSION = brighter beam.)
RIGHT HAND CONTROL PANEL
●
Press HIGH TENSION ON/OFF to turn on HT
(green light comes on). Wait until HT reaches
160 kV.
●
On CRT page select FREE CONTROL. FOCUS on right hand control panel now
controls HT. Turn large outer knob clockwise to gradually increase HT to 200 kV.
If step size of HT increase is too
small/large, turn inner knob
STEP SIZE clockwise/
anticlockwise.
Keep an eye on IGP and
EMISSION; if either suddenly
jump up, wait until they recover
before further increasing HT.
●
Once HT at 200 kV, press FREE CONTROL to deselect it, and press READY to
return to main CRT page.
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