1100 Series Nano Pump Service Manual 65
Troubleshooting and Test Functions 2
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.
Running the Test
1 Select the ChemStation’s Diagnosis screen; from the nano pump tests
selection box, select “Micro Mode Pressure Test”.
2 Start the test and follow the online instructions
NOTE
Make absolutely sure that all parts of the flow path that are included in the test are
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.
NOTE
In step 10 of following procedure, if you block the flow sensor outlet use the PEEK blank nut
provided in the accessory kit. Don‘t connect a SST blank nut to the flow sensor outlet, this
could damage the flow sensor
To Next Page
Loading...
Need help?
General
