Agilent Technologies 7890A - FPD Output Too High or Too Low

46 Troubleshooting
3 Chromatographic Symptoms
FPD Output Too High or Too Low
• Verify that the correct filter is being used. Do not use a
phosphorus filter with sulfur- optimized flows or a sulfur
filter with phosphorus- optimized flows.
• Check the position of the column as installed in the
detector.
• Check the gas purity.