Shutting down for less than 24 hours

For short-term idle times (less than 24 hours), maintain the solvent flow to preserve flow cell cleanliness.

If a few hours will pass before the next injection, reduce the flow rate in the interim to a few tenths of a mL/min to conserve solvent. Keep the detector operating and the column heater at operating temperature during this period.

To shut down the system for less than 24 hours:

1. Continue to pump the initial mobile phase mixture through the column. Doing so prevents accumulation of contaminants in the flow cell and maintains the column equilibrium necessary for good retention time reproducibility.
2. To lengthen lamp life, extinguish the detector lamp by tapping COMMANDS > UV Detector Lamp.
   Power off Lamp appears on the screen.