Hitachi OE700 Series, Operating Manual

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9 Maintenance
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46 Hitachi High-Tech Analytical Science
9.5 Replacing the ceramic insert in the spark stand
Information
There are a separate tungsten electrode, brush, ceramic insert and spark stand plate for
every matrix.
Replace the ceramic insert whenever you change the matrix.
1. Switch the instrument off (chapter 9.1, page 39).
2. Disassemble the spark stand plate (chapter 9.3.2, page 42).
3. Disassemble the electrode (chapter 9.4.2, page 44).
4. Place the screw head pin from the accessory case into the ceramic insert (1, fig. 9-
6) from the top and expand the pin with the screw head.
5. Use the pin to remove the ceramic insert from the spark stand in an upward
movement.
Fig. 9-6 Ceramic insert (example)
Information
Observe the safety regulations for handling acetone!
6. Clean the pulled out ceramic insert with a soft, acetone-soaked cloth.
•
If the ceramic insert cannot be cleaned, replace it.
7. Reinsert the ceramic insert of the new matrix into the spark stand.
•
Make sure that the seal is mounted.
8. Assemble the spark stand plate of the new matrix on the spark stand
(chapter 9.3.2, page 42).
9. Assemble the electrode of the new matrix (chapter 9.4.2, page 44).
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