Shimadzu IonFocus Instruction Manual page 48

Atmospheric pressure ionization interface
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3 Preparation
4
Mount the DUIS focus unit ASSY.
Take care because the tip of the needle unit is sharp.
Align the pin of the DUIS focus unit ASSY with the notch, and insert the ASSY
as far as it will go.
Visually check that the tip of the capillary is aligned with the center of the
electrodes of the DUIS focus unit ASSY.
Check that the tip of the corona needle is in the notch of the focus electrode
1 of the DUIS focus unit ASSY. If the tip of the corona needle does not enter
the notch of the focus electrode 1, replace the corona needle.
"5.2.5 Maintenance of the DUIS Focus Electrodes" P.58
26
IonFocus
Unit

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