INFICON Explorer Portable Gas Chromatograph - Manual (Page 277)

Explorer Operator Manual
275
Problem: There are negative dips following large positive peaks in the
chromatogram
Cause: The ECD is contaminated.
Action: Set the detector temperature to 80 C and the increase the pressure to 14
psi, or contact
INFICON.
WARNING
Do not open the instrument or attempt to remove the ECD. If the
ECD must be removed from the instrument, contact
INFICON.
Problem: Signal level too high
Cause: Components of the last analysis are still on the column.
Action: Purge the column and decrease the backflush duration to flush out the
heavier compounds. If the heavier compounds must be detected, adjust the analysis
time so these compounds have enough time to clear the analytical column, or ensure
you have selected the correct column for your application.
Cause: The ECD is contaminated.
Action: Set the detector temperature to 80 C and the increase the pressure to 14
psi, or contact
INFICON.
WARNING
Do not open the instrument or attempt to remove the ECD. If the
ECD must be removed from the instrument, contact
INFICON.