INFICON Explorer Portable Gas Chromatograph - Manual (Page 273)

Explorer Operator Manual
271
Cause: Pieces of cored septum have fallen down inside the injection port.
Action: Remove the injection port and clean it as outlined in Cleaning the
Injection Port Assembly on page
249.
Problem: Peak appears but is not recognized
Cause: Compounds have drifted from original assay retention time values.
Action: Update the compound library and once the library has been updated save the
new values. You must do this for each column/detector pair.
Cause: Peak is not stored in the library.
Action: Ensure the compound peak is stored in the library.
Cause: Retention time window is too small.
Action: Adjust the window percent as discussed on page 115.
Cause: The sample was injected onto the wrong column.
Action: Ensure you have selected the correct column for your application. Refer to
the user notes provided with your assay.
Cause: Flow rates are not set correctly.
Action: Ensure the pressure settings are correct for your application. Refer to the
user notes supplied with your assay.
Problem: Peaks appear too slowly
Cause: Pressure is too low resulting in low detector flow rates.
Action: Check for a pressure fault and ensure the internal carrier gas cylinder is full,
or ensure the pressure setting is correct for the selected method.