Bio-rad ChromLab™ Software Manuel d'utilisateur Page 75

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System Settings
User Guide | 7 3
When Control Flow to avoid overpressure is selected, the system lowers the flow
rate to avoid exceeding the maximum pressure. Typically, Control Flow activates
when the pressure reaches 80% of the maximum set pressure from the column.
This limit can be changed. The flow rate is lowered to half the set flow rate. Flow
rate returns to normal when the phase changes and drops only if the pressure in the
next phase continues to exceed the upper pressure limit of the column.
Note: If the pressure increases rapidly and exceeds the specified limits, or the
flow rate dr
ops below the specified flow rate, the system shuts down.
To control the flow rate
1. Select File > System Settings to open the System Settings dialog box.
2. Choose the Control Flow tab.
3. Specify a percentage of maximum pressure at which you want Control Flow to
activate (the default is 80%).
The system reduces the flow rate by 50% when pressure reaches the specified
per
centage of the maximum pressure.
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