Agilent-technologies Quaternary Pump 1100 Series Manuel d'utilisateur télécharger pdf (Page 89)

Troubleshooting and Test Functions

Leak Test

Ramp 1: After initialization, plunger 2 is at the top of its stroke. The test begins with

plungerplunger 1 delivering with a stroke length of 100µl and a flow of

153µl/min. The plunger sequence during the pressure ramp is 1-2-1-2. The

pressure increase during this phase should be linear. Pressure disturbances

during this phase indicate larger leaks or defective pump components.

Plateau 1: plunger 2 continues to pump with a flow rate of 2µl/min for approximately

one minute. The pressure during the plateau should remain constant or

increase slightly. A falling pressure indicates a leak of >2µl/min.

Ramp 2: The flow is changed to 153µl/min, and plunger 2 continues to deliver for the

rest of its stroke. Then plunger 1 continues to pump to complete the second

half of the ramp.

Plateau 2: The flow is reduced to 2 µl/min for approximately one minute (plunger 1 still

delivering). The pressure during the plateau should remain constant or

increase slightly. A falling pressure indicates a leak of >2 µl/min.

Ramp 3: The flow increases to 220µl/min and the stroke is changed to 100 µl. Plunger 1

completes its stroke. Next, the flow is changed to 510µl/min. The ramp

reaches 390 bar with the plunger sequence 2-1-2-1.

Ramp 4: When the system pressure reaches 390 bar, the flow is reduced to zero, and

the pressure stabilizes just below 400 bar.

Plateau 3: 1 min after reaching the maximum pressure, the pressure drop should not

exceed 2 bar/min.

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Agilent-technologies Quaternary Pump 1100 Series Manuel d'utilisateur Page 89