Troubleshooting 3-19
(possibly caused by a plug) or lower (possibly caused by a leak)? Are
pressure fluctuations in the same pressure range as during normal
operation?
When your system is installed, and each time you develop a new method,
record the system conditions during normal operation.
3. Identify in the following order the symptom that varies from normal
system operation:
a. System pressure (high, low, or erratic)
b. Baseline (fluidic-path related or detector-electronics related)
c. Changes in peak retention time (incorrect or changing over time)
d. Loss of peak resolution
e. Abnormal peak shape (smaller than expected, broad, tailing, and so
on)
f. Incorrect qualitative and/or quantitative results
4. Run the performance tests for each chromatographic instrument to
quickly determine if a problem exists with a particular instrument.
If you determine that there is a problem related to another system component,
refer to the appropriate operator’s guide.
When to call Waters technical service
Many problems with an e-SAT/IN module can be easily corrected. However,
if you cannot correct a condition, contact Waters Technical Service at 800
252-4752, U.S. and Canadian customers only. Other customers, call your
local Waters subsidiary or Technical Service Representative, or call Waters
corporate headquarters in Milford, Massachusetts (U.S.A.).
When you call Waters Technical Service, have the following information
available:
• Completed normal operation checklist for the method you are using
• Nature of the symptom
• Waters e-SAT/IN serial number
• Description of system configuration
To Next Page
