Returning The System To Atmospheric Pressure - Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual

Returning
Before you disconnect a nanoViper fitting from its receiving port, always return the solvent line to
the System to
atmospheric pressure. The high-pressure solvent lines in the EASY-nLC solvent system can be divided into
Atmospheric
two categories based on their position relative to valve S.
Pressure
Upstream of Valve S
Solvent Lines
The following solvent lines (numbered from left to right in
valve S.
#
1
2
3
❖ To return the solvent lines that are upstream of valve S to atmospheric pressure
1. On the touch screen, press Home > Overview.
2. Using the valve controls, set the valves to the following positions:
Figure 3
• Upstream of Valve S Solvent Lines
• Downstream of Valve S Solvent Lines
Solvent line
Port 6 of valve A to flow sensor A inlet 4
Port 6 of valve B to flow sensor B inlet 5
Flow sensor A outlet to mixing Tee
inlet
Valve Position
A and B Center
S and W 1–6
shows the flow path when valves A and B are Centered and valves S and W are in position 1–6.
Figure
# Solvent line
Flow sensor B outlet to mixing Tee inlet
Mixing Tee outlet to port 4 of valve S
6 Sample loop connected to ports 2 and 5 of valve
S
Effect
Maintains the pressure between the pump A and valve A during the
Analytical Column Equilibration script.
Vents the system pressure downstream of valve A.
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3) are in the flow path upstream of