INFICON 3000 Micro GC Gas Analyzer Operating Manual - Manual (Page 39)

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3000 Micro GC Operating Manual
3.3.3.3 Fixed Injector
Fixed Injectors are unique to 3000 Micro GC. Fixed Injectors provide the best
accuracy and precision for 0.2% levels and higher.
Valid settings are between 0-50 ms. An inject time of 0 ms results in no injection.
A typical setpoint is 30 ms. No significant difference in inject volume is achieved
from inject times between 15-50 ms. Values less than 15 ms may result in
repeatability issues.
Actual injection volumes are typically 1-2 µL of gas.
Fixed volume injectors should not be used for trace levels (<200 ppm).
Fixed injectors minimize any matrix effects as sample density varies with
compositional changes.