94 Agilent 1200 Preparative Pump User Manual
6 Troubleshooting and Diagnostics
Pressure Test
Pressure Test
Prep Pump Pressure Test Description
The pressure test is a quick, built-in test designed to demonstrate the
pressure-tightness of the system. The test involves monitoring the flow rate,
required to keep a constant pressure of 350 bar, as the preparative pump runs
through a predefined pumping sequence. The resulting flow rate provides
information about the pressure tightness of the system.
Step 1
The test begins with an automated flushing of the pump at a flow rate of
25 ml/min with an open EMPV.
Step 2
The EMPV is closed and next, piston A begins pumping solvent with a flow
rate of 0.5 ml/min until reaching a pressure of 150 bar. At this point, the pump
delivers at a flow rate of 0.2 ml/min until reaching a pressure of 250 bar. The
pump then delivers at a flow rate of 0.1 ml/min until reaching a pressure of
345 bar, then switches into its “Keep pressure mode”.
Step 3
When the system pressure reaches 350 bar, the preparative pump switches to
its “Keep-pressure-mode”. The flow rate to compensate for leaks should from
this point onwards be no more than 10 µl/minute.
To test the pressure tightness of all individual components in the flow path of the pump
itself use the leak test, see “Prep Pump Leak Test Description” on page 98.
To Next Page
Loading...
