Conducting analytical troubleshooting 4-5
Following are number of causes and possible solutions for analysis problems.
For further help, contact Waters Service.
When reproducibility fails to meet specifications, check the following:
If a blank gives a peak too high for the criteria:
Cause Solution
Air in flow path Perform an initial wash by clicking “Wash needle”
in the 2707 Console or using the control panel.
Leaking syringe If leakage occurs at the top of the syringe,
determine whether the syringe is mounted
properly and that its gasket is in place.
If leakage occurs at the bottom of the syringe,
replace the syringe or plunger tip.
Leaking syringe valve Inspect the valve and replace if needed.
Rotor seal worn out Replace the seal. Inspect the stator.
Dead volumes in tubing
connections
Redo connections with new ferrules and nuts.
Broken degasser Repair the component, and confirm operation.
Cause Solution
Solubility problem Modify the sample or wash solution.
Contaminated blank Use a new blank.
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