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- Pressure Transducers and component tolerances variations require the circuit board to be matched to the transducer.
- Connect a voltmeter to the pressure board with the black lead on TP11 and the red lead on TP12.
- Apply power to the pump and verify that the lower pressure limit is 0 PSI and the upper pressure limit is set to the pumps maximum pressure (or default power-up pressure in some special cases). If they are not at these values, change them.
- With the pump stopped, the prime-purge valve open, and the pump at atmospheric pressure, adjust the “Zero Adjust” VR1 trimpot until the voltmeter reads approximately -0.015 volts.
- Close the prime-purge valve and run the pump at 1.00 mL/min. Turn the VR2 “Max Adjust” trimpot counterclockwise if the pressure readout on the pump approaches 5000 PSI. This will prevent an overpressure fault from stopping the pump. Stop the pump when the test gauge reads approximately 5200 PSI.
- Recheck the zero pressure value and the high pressure value, and correct as necessary.
- Pressure should be set as accurately as possible, typically within 10 PSI of the gauge used. However, accuracy values within 40 PSI using 10,000 PSI transducers are acceptable.
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