PRECESSION ELEPHANT 2 Scan Head 2
3. If the contamination persists then repeat
procedure
–
cleaning
with
acetone HPLC grade
as cleansing agent and new cotton swabs and new lens
cleaning paper.
8.7 Replacing the complete focusing unit
Requirement
•
The focusing unit is damaged.
Tools
•
Torx key set
Procedure
1. Switch or turn off :
a. Electrical power
b. Process gas and purge gas supplies
c. Cooling water supply
2. Disconnect at the scan head:
a. Electrical lines
b. Gas lines; see also section
on page
c. Cooling water lines; see also section
on page
3. It is not necessary to drain the scan head from the remaining cooling water. The
couplings are self-sealing.
72