Evaluating The Results - Agilent Technologies LC Series User Manual

7
Test Functions and Calibration
System Pressure Test

Evaluating the Results

The test fails, if the leak rate between pump and blank nut is higher than the
limit of 3 μL/min.
If the System Pressure Test fails:
• Ensure that all fittings between the pump and the blank nut are tight.
• Repeat the test.
Often it is only a damaged blank nut itself (poorly shaped from overtightening) that causes
N O T E
a failure of the test. Before investigating on any other possible sources of failure make
sure that the blank nut you are using is in good condition and properly tightened!
If the test fails again, insert the blank nut at the outlet of the previous module
in the stack (e.g. autosampler outlet if TCC has been tested before), and repeat
the test. Exclude each module one by one to determine which module is
leaking.
If the pump is determined to be the source of the leak, run the Pump Leak Rate
Test.
126 Agilent InfinityLab LC Series 1260 Infinity II Isocratic- and Quaternary Pumps User Manual