2000 MS Hardware Maintenance
140
Troubleshooting
100% value TIC
18:28 ratio
19:18 ratio
28 width
<100 <1000
~ 1:1
10 to 15%
< 1 m/z
7. Spectra observed if there is an air leak in your system.
An Air/Water Spectrum Obtained from a System with a
Small Air Leak and Little Water Vapor as Indicated by:
•
The peak height at mass 28 is noticeably greater than that at mass 18.
•
The ratio of the peak height at mass 28 to that at mass 32 is greater than
4:1.
•
The 100% scale counts value has increased to greater than 500.
•
The ratio of the peak height at mass 18 to that at mass 19 is greater than
or equal to 10:1.
An Air/Water Spectrum Obtained from a System with a Moderate
Air Leak and Little Water Vapor as Indicated by:
•
The peak at 28 starts to overload.
•
The 100% counts value may be several thousand counts.
•
The peak height at mass 18 is greater than that at mass 19.
