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Introduction
Pressure Buildup
Over time, you may notice a gradual increase in the system operating
pressure. If you observe pressure readings greater than 3.45 MPa (500 psi)
above the normal operating pressure of your analysis, check the following
items:
If you are injecting "clean" samples and there is no other apparent cause
•
for the pressure buildup, remove, disassemble, and clean the injector.
If you are injecting "dirty" samples, the injector may be clogged or the
•
column packing material may have retained contaminated particulates.
Remove and clean the injector, and replace the column.
The column end fitting or column frit may be plugged. Replace the end
•
fitting or frit to relieve excess pressure. (Refer to the instructions
supplied with the column.)
In-line filters may be plugged. Replace the filter element.
•
With the pump connected directly to the detector input, if you still
•
experience excessive pressure, the problem could be a plugged flowcell.
You can flush, reverse-flush, or rebuild the flowcell.
Warnings and Precautions
1-9
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