Agilent Technologies MSD 5977B Series Operating Manual page 186

7 General Maintenance
To Clean the EI HES
4 Abrasively clean the surfaces that contact the sample or ion beam.
5 Rinse away all abrasive residue with reagent-grade methanol.
6 Separate the parts that were abrasively cleaned from the parts that were not
Always wear clean gloves to prevent contamination when working in the
C AU T I O N
analyzer chamber.
All of these solvents are hazardous. Work in a fume hood, and take all
WAR N IN G
appropriate precautions.
7 Ultrasonically clean the parts (each group separately) for 15 minutes in each
8 Place the parts in a clean beaker. Loosely cover the beaker with clean
9 Dry the cleaned parts in an oven at 100 °C for 5–6 minutes.
186
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 away before ultrasonic cleaning. If the
methanol becomes cloudy or contains visible particles, rinse again.
abrasively cleaned.
of the following solvents:
• Methylene chloride (reagent-grade)
• Acetone (reagent-grade)
• Methanol (reagent-grade)
aluminum foil (dull side down).
5977B Series MSD Operating Manual