Varian 990 dCLD II, Operation Manual

Page: 104 / 162

Model 990 dCLD II Component Leak Detector
5-10
3. Remove the button TC carefully and place it sensing wire
➀
side up as shown in
Figure 5-8, (contact pin side down) on a clean surface.
Figure 5-8 Button TC
CAUTION
The sensing wire on the bottom side of the TC is approximately
3 mils thick. Care must be taken not to damage this wire.
5.3.3 Removing the Ion Source
NOTE
The ion source is typically replaced during the normal
maintenance procedure. A new and clean ion source provides
optimum sensitivity and system performance.
See “Ion Source Replacement Outside of
Spectrometer Tube Overhaul” on page -19 when replacing the
ion source outside of annual maintenance.
WARNING
When handling the Ion Source, wear powder-free butyl or
polycarbonate gloves. If you handle the Ion Source with bare
hands, wash them thoroughly and especially before smoking or
eating.
1. Remove the 4 slotted screws that hold the ion source header piece.
➀