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Troubleshooting and Test Functions
Leak Test
Leak Test
Description
The leak test is a built-in troubleshooting test designed to demonstrate the
leak-tightness of the pump. The test should be used when problems with the
pump are suspected. The test involves monitoring the pressure profile as the
pump runs through a predefined pumping sequence. The resulting pressure
profile provides information about the pressure tightness and operation of
the pump components.
The pump outlet is blocked with a blank nut, and then the test is run using
isopropyl alcohol (IPA), while monitoring the pressure profile (using an
integrator on the analog output, or in the plot screen in the Control Module or
the ChemStation).
Figure 9 Typical Leak-Test Pressure Profile with IPA
Pressure [bar]
Time [minutes]
Ramp 1
Plateau 1
Ramp 2
Plateau 2
Ramp 3
Ramp 4
Plateau 3