86 User Information
Advanced Functions
Leak test
Description
A leak test checks for the following:
• Restrictions in the flow path associated with filling the loop
• Leaks in the carrier flow path
• Leaks in the vial pressurization flow path
• Leaks across the 6-port sampling valve
Symptoms Symptoms associated with restrictions include:
• No peaks
• Loss of sensitivity
Restrictions are often caused by the swelling of the solenoid
vent valve seals or the build up of residues in the vent tube.
Symptoms associated with leaks include:
• High detector backgrounds
• Loss of sensitivity
The most common leaks are at the connections of the transfer
line, external plumbing, and sample probe union.
See Leak Test on page 148 for the leak test procedure.
medium_standard.book Page 86 Tuesday, February 17, 2004 10:14 AM
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