Waters 2414, Обзор и руководство по обслуживанию

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June 11, 2015, 715004754 Rev. A
Page 26
Figure 1–6: Flow path during analysis
1.3.4.1 Purge mode
While in purge mode, solvent passes through the sample side and reference side of
the flow cell and exits the “purge out” port. A programmatically controlled solenoid
valve determines the fluid path.
When you purge the 2414 RI detector, solvent takes this path:
1. Enters through inlet tubing port.
2. Passes through the sample in tube of the countercurrent heat exchanger.
3. Flows through the end-cap heat exchanger.
4. Flows through the sample side of the flow cell.
5. Flows out to the cross fitting, bypassing the countercurrent heat exchanger.
6. Flows through the reference side of the flow cell.
7. Exits through the pressure relief valve, to the purge outlet tubing port.
End Cap HE
Flow cell
Reference
Sample
Cross section
Fluid path for
normal mode
Counter
current HE
Tee connection
Relief
valve
(closed)
Solenoid
valve
(opened)
Sample In
Waste out
Purge out