1260 Infinity Binary Pump User Manual 131
Test Functions and Calibration
8
Valve Test
Valve Test
Description
The Valve Test provides a fast and accurate way to verify proper hydraulic
operation of the binary pump. Problems that are related to defective
valves, seals or pistons can be diagnosed and usually the defective part is
identified.
Step 1
The system is setup with water on both channels and a restriction
capillary is attached to the outlet of the pump. Pump head A is delivering
at 1 mL/min. The pressure signal is monitored and overlaid with the
piston movement plot. The pressure pattern and the slope of the pressure
signal are evaluated for the delivery strokes of both pistons.
Step 2
The procedure from step 1 is repeated on pump head B.
Step 3
The data from step 1 and 2 are evaluated. In case test failed, a conclusion
about the defective part is made.
If a minimum firmware of A.06.50 is installed on this module and a minimum Lab Advisor
revision of B.02.03. is available, please run the improved Leak Rate Test instead (see “Leak
Rate Test” on page 137).
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