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Comments
There
are many non-injector causes of pressure changes. They usually occur as
random events, not associated with movement of the injector handle. Examples
are a leaky check valve in the pump or a partially plugged filter in the
mobile phase reservoir.
If the system pressure increases when the injector is switched, see the Blockage section.
Decreased System Pressure
This section discusses the causes of a loss of system pressure that occurs when the injector is switched from LOAD to INJECT or from INJECT to LOAD. Problems involving an increase in system pressure are discussed in the Blockage section.
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