Varian 990 dCLD II, Operation Manual

Page: 105 / 162

Model 990 dCLD II Component Leak Detector
5-11
2. Remove the ion source
➀
from the spectrometer tube body (Figure 5-9).
Figure 5-9 Removing the Ion Source
NOTE
Dark carbon-like deposits around the ion source filament and/
or a rainbow-like discoloration on the inside walls of the ion
source cavity indicate that the spectrometer tube has been
operated at too high a pressure. This can occur from a system
pressure leak or transferring into test at too high a pressure.
3. To remove the header from the ion source, push down on the center post.
4. Examine the ion source (Figure 5-10) and cavity (Figure 5-11) for deposits and
discoloration. When examination is completed, dispose of it properly or return it to
Varian for exchange.
Figure 5-10 The Ion Source
➀