The Mounting Flange; The Outer Source Assembly - Waters Xevo TQ-GC Overview And Maintenance Manual

EI Filament 2
CI filament housing assembly fitted with one uncoated rhenium CI filament
Before you remove the inner source, you must prepare the instrument so you can work safely on
the inner source and the remaining source components (see
on the source and

1.5.2 The mounting flange

The mounting flange assembly is the mechanism to which the inner source assembly is fitted.
You need to remove the mounting flange assembly to access the outer source.
Figure 1–14: Mounting flange assembly
Thumbscrews x 4
Inner source securing slots x 2
To access and remove the mounting flange assembly, do the following:
1. Prepare the instrument so you can work safely on the source components (see
the instrument for working on the
2. Remove the inner source assembly (see

1.5.3 The outer source assembly

You can access the outer source assembly, which comprises the source heater, PCB holder, and
focusing optics, from the front of the instrument. The heater in the outer source raises the source
temperature to stop the sample and matrix from condensing on the source. The lens stack
focuses the ion beam prior to entering the analyzer. Permanent magnets are used to spiral the
electrons into the inner source.
Removing and refitting the source
source).
April 27, 2020, 715005564 Ver. 01 (previously released as Rev. A)
Preparing the instrument for working
components).
Removing and refitting the source
Page 25
Preparing
components).