Table of Contents

Replacement of EI Ion Source

Required parts¶

No.	Part name	Category	Required quantity	Note
①	EI ion source box	GC-MS-related Parts	1	This is heat-treated.
②	Ion Source ASSY attachment/detachment jig	GC-MS-related Parts	1	Used when removing the ion source box from the main unit.
③	Box screwdriver	GC-MS-related Parts	1	Used when replacing the ion source box.
④	Lens 1 ASSY	GC-MS-related Parts	1	This is the assembly of nut, spring washer, washer, plate, insulator and lens 1.
⑤	Lens 1	GC-MS-related Parts	1	This is heat-treated.
⑥	Insulator	GC-MS-related Parts	1	Replace if this is broken.

Procedure¶

Step 1¶

Before starting maintenance, perform the following steps in order from 1 to 3:

1 Allow GC/MS to come to an automatic stop. Wait until [Completed] is displayed.
2 Shut down LabSolutions.
3 Turn off the main switch of the instrument.

Step 2¶

Open the front door.

Step 3¶

Insert the ion source ASSY attachment/detachment jig(②) to the specified position and screw it in.

Note

Wear clean gloves for working with the parts and tools. Wipe all tools with a soft cloth soaked with acetone to remove any dirt or grime.

Step 4¶

While holding the ion source ASSY attachment/detachment jig with your hand, loosen the two screws completely using the box screwdriver(③).

Step 5¶

Hold the ion source ASSY attachment/detachment jig and remove the ion source box assembly.

Removed ion source ASSY attachment/detachment jig and ion source box assembly

Note

Place the removed parts on a soft cloth and prevent them from being contaminated.

Step 6¶

Remove the ion source ASSY attachment/detachment jig(①) and separate the ion source box and lens 1 ASSY(④).

Step 7¶

Using the box screwdriver, disassemble lens 1 ASSY.

Nut loosened using the box screwdriver
Once the nut is somewhat loose, use your hand to completely loosen it.

Lens 1 ASSY disassembled

Step 8¶

Prepare the new ion source box and lens 1.

Step 9¶

Assemble the ion source.
Insert parts in the following order: Lens 1(⑤) → Insulator(⑥) → Plate(★1) → Washer(★2) → Spring washer(★3) → Nut(★4).

Step 10¶

Lightly tighten the nut with your hand while holding the plate.
Using the box screwdriver, carefully tighten the nut of the lens 1 ASSY.

Note

Applying excessive force may cause lens 1 to warp and/or the insulator to break.

Step 11¶

Fit the lens 1 ASSY into the ion source box while aligning the holes for the jig, the two protrusions on the plate, and the two holes in the ion source box.

Step 12¶

Attach the ion source ASSY attachment/detachment jig.
Hold the ion source ASSY attachment/detachment jig and fit the ion source box assembly into the instrument.

Note

Hold the jig as shown in the figure and tentatively draw the two screws out of the plate to facilitate installation.

Step 13¶

Using a box screwdriver, lightly tighten the two screws, starting from the screw on the left side. Remove the ion source ASSY attachment/detachment jig. Tighten the two screws completely.

Step 14¶

Check for any dirt adhesion on the O-ring mating surface(★1) of the vacuum container and the O-ring(★2).

Step 15¶

Close the front door.

Step 16¶

Start up the GC/MS.

Step 17¶

Launch the [Analysis] program and click [Detail] on the instrument monitor.

Step 18¶

Display the [Consumables (MS)] tab in the [Monitor Details] window. Record the usage time of [Ion Source].

Note

Recording the ion source usage time is recommended if you are planning to reuse the removed ion source next time.

Click the [Consumables Reset] button.

Step 19¶

In the [Consumables Reset] window, enter "0" in the Ion source field and click the [Set] button. After applying the setting, click [OK].

Click [Close] in the [Monitor Details] window to close the window.