Agilent Technologies 1100 Series Manual de Instruções descarregar pdf (Página 66)

56 1100 Series Capillary LC System Manual

4 Basic System Troubleshooting

System Pressure Abnormally Low

Symptoms:

The current system pressure is significantly below the typical system pressure

produced by this method with this column.

System Pressure Abnormally Low: Possible causes and actions

Possible Causes Suggested Actions Notes

Leaks somewhere in the

system

• Use a flashlight and absorbent tissue to search

for leaks throughout the system.

At very low flow rates, a leak may

never accumulate enough liquid to

trigger the module leak sensors. Low

flow rate leaks are also very hard to

see.

Solvent channels are not

correctly purged. %Ripple

might also be too high

• Perform a 2-minute purge at 2500 µl/min for

each solvent channel.

This is especially likely if the system

has been unused for more than one

day.

Dirty solvent inlet filters

Solvent intake is being

restricted, %Ripple might

also be too high

• Temporarily remove solvent inlet filters to see if

they are the cause of the problem. If so, clean or

replace the solvent inlet filters.

To minimize this problem, prefilter

the mobile phase, and take

precautions against algae formation

in the water.

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Agilent Technologies 1100 Series Manual de Instruções Página 66