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Manual
MS-00809-0100-0470
•
Potential cause
AVT timed event adjustment.
Example: AVT Timed Event Adj Fail Time (#3) = 8, Time (#4) = 6, 7
NOTICE
If an adjustment of a timed event results in it being within 0.5 seconds of another timed
event, the AVT Timed Event Adjustment will be raised, and the retention times and timed
events will be set back to the pre-adjustment values.
Recommended actions
Potential cause
AVT missing peak.
Example:
Rosemount 470XA
NOTICE
Click the Anly Type column to sort the chromatograms by type.
If the module has not been overhauled:
a. Select the Chromatogram Viewer on the Chromatograph menu.
b. Click GC Archive.
c. Look at the last AVT chromatogram.
NOTICE
Click the Anly Type column to sort the chromatograms by type.
If the retention time for n-pentane is greater than 120 seconds, increase the
pressure with the carrier pressure regulator.
If the retention time for ethane is greater than 215 seconds, increase the pressure
with the carrier pressure regulator.
1. Using MON2020, select the Chromatogram Viewer on the Chromatograph
menu.
2. Click GC Archive.
3. Look at the last AVT chromatogram.
NOTICE
Click the Anly Type column to sort the chromatograms by type.
•
If the retention time for n-pentane is greater than 120 seconds, increase the
pressure with the carrier pressure regulator.
•
If the retention time for ethane is greater than 215 seconds, increase the
pressure with the carrier pressure regulator.
AVT Missing Peak: i-Pentane
Troubleshooting
June 2023
123
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