Pressure Calibration for Series III Pump (Serial numbers A19999 and lower)

1. Connect the pump’s inlet port to the solvent bottle using an inlet line and filter.
2. Connect a Multimeter to the pressure board with the black lead on TP3 and the red lead on TP5.
3. Connect the pump’s outlet port to the Digital Pressure Gauge and shut-off valve.
4. Apply power to pump and verify that the Lower Pressure Limit is 0 PSI and the Upper Pressure Limit is at 5000 PSI. If they are not at these values, change them.
5. Prime the pump at its Prime/ Purge Valve with the syringe.
6. Close the Prime/Purge Valve and open the shut-off valve. Run the pump for a few minutes to prime gauge/valve line.
7. With the pump stopped and the Prime/Purge Valve Open and the pump at atmospheric pressure, adjust the P-ZERO trimpot until the Multimeter reads approximately 0.000 volts.
8. Close the both the Prime/Purge Valve and the shut-off valve and run the pump at 2.50 ml/min.
9. Wait for the pump to built pressure and trigger the Upper Pressure Limit. The pressure should stabilize and drop slowly. If the pressure continues to drop quickly, check for leaks.
10. Adjust the P-SPAN trimpot until the pressure displayed on the pump’s front panel equals the pressure displayed on the pressure gauge.
11. Vent the pump to atmospheric pressure by slowly opening the Prime/Purge Valve. (A rapid release of pressure will damage the Pulse Damper or Pressure Transducer.)
12. Adjust the P-ZERO trimpot if necessary to obtain 0.000 volts. Note: The syringe must be removed from the Prime/Purge Valve to obtain an accurate zero.
13. Press the Run/Stop button or Mode button to cancel the pressure fault.
14. Repeat steps 7 through 13 until no adjustment is required at step 12.