1) Steady state accuracy of metering pump: ± 2% of rated flow. If the measured 100% stroke flow rate of the metering pump is 1000L/h, the allowable deviation for steady-state accuracy is ± 2% * 1000=± 20 L/h. Steady state accuracy refers to the flow deviation obtained by calibrating the flow rate of the dosing pump and related systems at different time points without any adjustment or change.
2) Linear accuracy: ± 3% of the rated flow rate. If the measured 100% stroke flow rate of the metering pump is 1000L/h, the allowable deviation for linear accuracy is ± 3% * 1000=± 30L/h. Linear accuracy refers to the deviation between the measured flow rate and the best fitting value obtained by uniformly selecting different stroke points for flow calibration within the range of 10% to 100% stroke of the metering pump
3) Repetitive accuracy: ± 3% of the rated flow rate. If the measured 100% stroke flow rate of the metering pump is 1000L/h, the allowable deviation for repeated accuracy is ± 3% * 1000=± 30L/h. Repetitive accuracy refers to the flow deviation obtained by selecting a certain stroke point for flow calibration within the range of 10% to 100% stroke of the metering pump, and then changing the stroke of the pump to run for a period of time before returning to the original stroke point for flow calibration.