1. Steady state accuracy of mechanical diaphragm metering pump: ±2% of rated flow. If the measured 100% stroke flow of the metering pump is 1000L/h, the allowable deviation of the 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 at different time points without any adjustments and changes in the related system.

2. Linear accuracy: ±3% of the rated flow. If the measured 100% stroke flow of the metering pump is 1000L/h, the allowable deviation of linear accuracy is ±3%*1000=±30L/h. Linear accuracy refers to the deviation between the measured flow rate and the maximum fitting value obtained by uniformly selecting different stroke points for flow calibration within the range of 10% to 100% of the metering pump stroke

3. Repeat accuracy: ±3% of the rated flow. If the measured 100% stroke flow of the metering pump is 1000L/h, the allowable deviation of the repeat accuracy is ±3%*1000=±30L/h. Repeatability refers to the flow rate 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 for a period of time, and then returning to the original stroke point for flow calibration. .