Agilent Technologies 1290 infinity - Pump Leak Rate Test

134 1290 Infinity Quaternary Pump User Manual
8 Test Functions and Calibrations
Pump Leak Rate Test
Pump Leak Rate Test
The Pump Leak Rate Tests is a diagnostic test to check the integrity and
tightness of the pump components. The test is started from the Services &
Diagnostics section in the Agilent Lab Advisor Software. The test is first
evaluating the tightness from the outlet valve downstream to the purge valve.
The pistons are positioned; afterwards the purge valve is switched to the
closed position. By moving the secondary piston into the pump chamber the
system is pressurized to 1000 bar (or 800 bar for G7104C). The flow rate to
keep the pressure stable is the corresponding leak rate.
The second part of the test is designed to verify the tightness along the piston.
Any irregularity on the piston surface (for example, scratches or deposits) will
be detected. During this test all components from the inlet valve downstream
to the blocked purge valve are included tested.
Now the primary piston is moving to deliver and generate pressure but the
secondary piston is retracting. The pressure is kept constant at 800 bar. The
process is repeated for the second pump head, if applicable.
Preparations:
1 Flush the system with HPLC grade water for several minutes from any
solvent channel.
2 Start the Pump Leak Rate Test from Lab Advisor.
3 Choose the channel with HPLC grade water and if you want to include or
skip an additional purging step.
4 Click OK and follow the instructions.
The test runs automatically without any further user interaction.
Evaluation:
The result as well as the applied limits are displayed after the automatic
evaluation. The limits are:
• The allowed leak limit for the secondary piston is ≤3L/min
• The allowed leak limit for the primary piston is ≤30 L/min