126 1260 Infinity Binary Pump User Manual
8 Test Functions and Calibration
(System) Pressure Test
(System) Pressure Test
Description
The (system) pressure test is a quick built- in test designed to demonstrate
the leak tightness of the system. The test involves monitoring the flow
profile while the pump delivers against a blank nut. The result is
presented as the leak rate of the module and provides information about
the leak tightness of the system between the outlet valves of the pump
and the blank nut.
Step 1
The test begins with the initialization of both pump heads. After
initialization, the pump is starting the compression phase and the required
flow rate is constantly monitored and adjusted. The pump continues to
pump until a system pressure of around 600 bar is reached.
Step 2
When the system pressure reaches 600 bar, the pump continues to pump
at a flow rate that keeps the pressure constant. The flow that is needed to
keep the pressure constant is directly translated into a leak rate.
This Lab Advisor test uses different names depending on the firmware revision used:
• FW revision ≥ A.06.50: System Pressure Test
• FW revision < A.05.60: Pressure Test
The blank nut can be positioned anywhere between the purge valve of the pump and the
detector inlet to pressure test the desired part of the system.
Blank nut placed at the outlet of flow cell
The applied pressure may cause permanent leaks or bursting of the flow cell.
➔ Never include the flow cell in the pressure test.
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