Testing Your Nano Pump; Micro Mode Pressure Test - Agilent Technologies 1100 Series Service Manual

Testing your Nano Pump

Micro Mode Pressure Test

Description
This is a fast test to verify the tightness of a micro system, where the pump is
operating in the micro mode and no manual purge valve is installed. The flow
path of the system which is tested for tightness is blocked by a blank nut. The
pressure is increased up to 380 bar and the remaining flow is measured in the
flow sensor while the system is blocked.
Step 1 The test begins with the initialization of both pump heads. Next, pump A
begins pumping solvent until a system pressure of 380 bar is reached.
Step 2 The pump is operating in the pressure control mode at 380 bar for several
minutes. The remaining flow in the column flow path between the EMPV and
the blank nut is measured.
Make absolutely sure that all parts of the flow path that are included in the test are
NO TE
thoroughly flushed with IPA before starting to pressurize the system. Any trace of other
solvents or the smallest air bubble inside the flow path will definitely cause the test to fail.
Running the Test
1 Select the ChemStation's Diagnosis screen; from the nano pump tests
2 Start the test and follow the online instructions
In step 10 of following procedure, if you block the flow sensor outlet use the PEEK blank nut
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provided in the accessory kit. Don't connect a SST blank nut to the flow sensor outlet, this
could damage the flow sensor
1100 Series Nano Pump Service Manual
selection box, select "Micro Mode Pressure Test".
Troubleshooting and Test Functions 2
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