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60 1100 Series Capillary LC System Manual

4 Basic System Troubleshooting

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.

Dirty EMPV (micro mode

only)

• Perform the EMPV cleaning procedure, followed

by the EMPV performance test. Refer to the

Capillary Pump Reference Manual.

Any system component

which is offering a changing

restriction to the pump.

• Replace the analytical column.

• Replace the filter frit in front (upstream) of the

EMPV.

The vacuum micro-degasser

is off, or has become

defective.

• Try another vacuum micro-degasser, or

experiment to determine the performance using

different degasser channels.

• If the mobile phase is very sensitive to

gaseousness, use the micro-degasser

continuous mode.

Basic performance problems

in the pump.

• Perform the pump Leak Test. Refer to the Capillary Pump

Reference Manual for information on

the leak test.

Unstable column flow and/or system pressure: Possible Causes and Suggested Actions (continued)

Possible Causes Suggested Actions Notes

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Agilent Technologies 1100 Series Bedienerhandbuch Seite 70