Replacing The Filament Of The Ion Source - Thermo Scientific TSQ Quantum XLS User Manual

Replacing the Filament of the Ion Source

Thermo Scientific
4. Align and reconnect the 8-pin connector to the lead pins on the EI/CI Source PCB.
5. Align the 3-pin connector so that the side with the beveled edge is closest to the L3 lead
pin and the side with the rounded corners is closest to the L1 lead pin.
6. Reconnect the 3-pin connector to the lead pins on the L1, L2, and L3 lenses.
7. Reinsert the capillary column into the ion source:
a. Using the I/R tool, remove the ion volume. See
page 73.
b. Push the capillary column in until you can see it in the ion source.
c. Pull the column back just far enough that you cannot see it.
d. Tighten the transfer line nut and transfer line union.
e. Using the I/R tool, install the ion volume. See
page 80.
8. Close and secure the cover to the ion source vacuum manifold.
The number of ions produced in the ion source is approximately proportional to the filament
emission current. If ion production is lacking, you might have to replace the filament. If the
measured emission current is substantially less than the value that the emission current is set
to, or if the measured emission current decreases over time, then the filament has failed or is
failing and requires replacement.
Tools needed
• Filament (P/N 120320-0030)
• Gloves, cleanroom grade (P/N 23827-0008 and 23827-0009)
• Lint-free cloth
Frequency
If filament fails
For the location of the ion source components, see
page page 94.
To replace the filament of the ion source
1. Prepare a clean work area by covering the area with lint-free cloth.
2. Shut down and vent the mass spectrometer. See
.
on page 51
Replacing the Filament of the Ion Source
"Removing the Ion Volume"
"Installing the Ion Volume"
Figure 50 on page 86 and
"Shutting Down the System Completely"
TSQ Quantum XLS Series User Guide
6
Maintenance
on
on
Figure 54 on
93