How to do if the intensity of detector become weak ?

1. Low energy of light source;

2. The circulation pool is polluted; Intuitively, there is no spectral peak or the spectral peak is small in the separation , The energy spectra shows a value of less than 25%.

Please flush the tube with an appropriate solvent at 10ml/min for 30min and observe the energy spectrum.If there is no change in the spectrum,it seems low energy of light source,please replace the deuterium lamp; If the spectrum changed, the circulation pool is polluted，please continue to clean with appropriate solvent.