Commands and Tips for Third-Party Devices
Agilent 1100/1200 HPLC System Diagnostics: Leak Test

The leak test allows you to check for leaks in the system. Chromeleon supports this test for the following pumps: G1312 (binary pump) and G1311 (quaternary pump).

Note:

The leak test is not available for the Series 1200 pump G1312B SL (binary pump).

 

To perform the test, click the button for the pump on the main diagnostic panel.

A subpanel is opened:

 

Follow the instructions on the right side of the subpanel. Clicking Next> takes you to the next step. For example, the instructions below apply to a G1312 pump with a solvent selector valve.

  1. Isopropanol Connect a reservoir containing isopropanol solvent to channels A(2) and B(2).

  2. Open valve Open the purge valve.

  3. Flush Flush the system with isopropanol from channels A(2) (51%) and B(2) (49%). (Pumps without degasser: Flush 2x2 minutes. Pumps with degasser: Flush 2x12 minutes.)

  4. Close valve Close the purge valve.

  5. Install cap. Install the restriction capillary G1313-87305.

  6. Flush Click the button to flush the system with isopropanol from channels A(2) (50%) and B(2) (50%).

  7. Replace cap. Replace the restriction capillary with a blank nut.

  8. Open valve Open the purge valve.

  9. Init pump Initialize the pump.

  10. Close valve Close the purge valve.

  11. Run This step starts the leak test. The LeakTestRun command is slightly different for the binary pump (G1312) and the quaternary pump (G1311). The results appear in the Audit Trail on the right.

  12. Open valve Open the purge valve and remove the blank nut.

 

The ramps and plateaus in the leak test vary slightly, depending on whether you are testing the binary pump (G1312) or the quaternary pump (G1311). (For a detailed description, refer to the pump manual.)

For the G1311 pump, the leak test is successful if:

a) The pressure reaches a certain value for the plateaus, e.g., 100 bar for the first plateau,

b) There is no increase in pressure on the first two plateaus, and

c) The pressure increase on the third plateau does not exceed 2 bar.

 

 Tips:  

To close the subpanel, click Cancel or Finish. This ensures that the pump is in a consistent state afterward.

For more information, refer to the pump manual.