The dilutor valve in the instrument can get stuck when idle for an extended time period, for example, during instrument storage. To avoid this, flush the system with an organic solvent to prepare for storage.


  1. Empty both needle wash solution bottles.
  2. Add at least 100 mL methanol or isopropanol to each bottle.
  3. Reconnect the bottles and make sure that the solution lines are fully immersed in the solution.
  4. Prime the solution lines using the service tool from the instrument interface (see Prime or empty the lines).
  5. Empty both needle wash solution bottles.
  6. Empty the waste container.

This procedure minimizes the risk of bacterial growth within the instrument during extended storage and is recommended when the instrument is expected to be idle for one month or longer.