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How can the XT instrument be checked to verify that it is operating correctly?

Here is short list of steps to verify that the XT instrument is operating correctly. Always refer to your manual for complete, detailed information.

Refer to XT15 Service Procedure #6 for a four page diagram that may help explain the operation.

  1. Before starting, verify water pressure is ON and there is not water flowing through the drain line.
  2. Add solvent to the XT15 fill cup until the solvent level reaches or exceeds the fill line in the site glass. (If XT10, add 350ml to vessel.)
  3. Close and lock the vessel (vessel should be securely closed).
  4. Select operating parameters and press START.
  5. The XT10 will start heating immediately.
  6. The XT15 will begin a FILL cycle. The Fill Valve (Q4) and Vent Valve (Q7) will open. After 60-90 seconds, solvent should fill the vessel and cover the glass level sensor in the XT15 vessel. The XT15 will start to heat.
  7. During heating, observe the drain tube. There should be no water exiting the XT10 or XT15 during heating.
  8. At minutes 2:00 and 4:00, the Q5 Valve will open briefly to exhaust any trapped air. The temperature on the LCD should rise rapidly. When it reaches 90C, the reflux cycle begins. Do not open the vessel. Pressure should be approximately 20-50 psi, depending on the solvent.
  9. At 5-8 minutes, the heat will reach 90C and the reflux cycle begins. The reflux cycle turns the reflux water on for 60 seconds and off for 30 seconds throughout the duration of the run. You can observe the water flow rate by viewing the flow meter to the left of the vessel.
  10. After the extraction has been completed, the condenser water valve will open and cool the condenser. The Q6 drain valve opens and the hot solvent will be pushed out of the vessel and into the condenser. On the XT10, the solvent will condense and fill the vent bottle. On the XT15, the solvent will fill the reservoir and site tube.
  11. After draining, the vessel base will be cooled with water. The vessel walls will remain warm.
Related Documents: 

Solvent, Vent and Water Diagram

AttachmentSize
PDF icon X5S006_Solvent_Vent_and_Water_Diagram.pdf63.11 KB

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