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Process Controller has a pump calibration routine available on the configuration tab. The pump calibration ensures that the Stamp Control Box sends the right milliamp current signal to the pump so that it spins at the rpm set by Process Controller. First make sure that you have selected the pump ID number that you want to calibrate. Then make sure that the slope and intercept have the values of 1 and 0 respectively. Always reset these values before doing a calibration. Save those values by clicking on the button to save the Stamp calibration. Close the pump calibration dialog box. Then create a state and a target pump rate of 0.05 (corresponding to 5 rpm for a 100 rpm pump) and a target pump rate of 0.95 (corresponding to a 95 rpm for a 100 rpm pump). Send these pump rate commands to the pump and then use the pump display to see the actual pump rpm. Record those values. For this example assume that the pump rpm was actually 92.8 when the target value was 95 rpm and was 3.2 rpm when the target was 5 rpm. Then return to the pump calibration dialog box and enter the values as shown in the figure. Click on the "calculate the Stamp slope and intercept" button and then click on the button to save the Stamp calibration. After saving the values close the dialog box and confirm that the pump now runs at the target speed set by Process Controller.
