Agilent Technologies 5977B Series Operating Manual page 218

7 CI Maintenance
.
If the CI repeller insulator is dirty, clean it with a cotton swab dampened with
C A U T I O N
reagent-grade methanol. If that does not clean the insulator, replace it. Do not
abrasively or ultrasonically clean the insulator.
Entrance lens Ion focus lens
Figure 71 CI source parts to be cleaned


Procedure
1 If the contamination is serious, such as an oil backflow into the analyzer,
2 Abrasively clean the surfaces that contact the sample or ion beam.
3 Rinse away all abrasive residue with reagent-grade methanol.
4 Separate the parts that were abrasively cleaned from the parts that were
218
Drawout cylinder
seriously consider replacing the contaminated parts.
Use an abrasive slurry of alumina powder and reagent-grade methanol on a
cotton swab. Use enough force to remove all discolorations. Polishing the
parts is not necessary; small scratches will not harm performance. Also
abrasively clean the discolorations where electrons from the filaments
enter the source body.
Ensure all abrasive residue is rinsed before ultrasonic cleaning. If the
methanol becomes cloudy or contains visible particles, rinse again three
times.
not abrasively cleaned.
Drawout plate Source body
5977B Series MSD Operating Manual

Repeller