Peristaltic pump The data is abnormal during use. What is the reason for this? About this problem, the small series of peristaltic pumps will give you a detailed understanding.
The peristaltic pump is generally divided into speed regulating type, flow line type and distribution type. The flow type driver can display the current flow rate, speed and other parameters of the peristaltic pump. The fluid transmitted by the pump is pulsating. Because of this pulsation, the conventional flowmeter can not measure accurately, so the volumetric flowmeter can only be used. This flowmeter can only adapt to part of the fluid transmission, and cannot measure the fluid with particles. This kind of flowmeter has a certain demand for liquid pressure, and the price is relatively expensive, which also leads to that the flow type peristaltic pump on the market is an open-loop product, and the displayed flow value is calculated rather than the actual value, which is generally 1% error, while the accuracy of RAVER can reach 0.5%.
The calculated value is based on the slope of the transmission curve caused by hoses of different specifications and materials, which usually forms a linear relationship. When a new peristaltic pump hose is replaced, there is a certain error between the actual value and the displayed value. At this time, the flow rate on the driver needs to be modified, Peristaltic pump Set to the actual flow rate so that the display corresponds to the transmission. However, due to the transmission curve and various factors, there will be a linearity error. Therefore, after the flow curve correction, once the motor speed of the driver is changed, there will be a certain error between the flow rate value displayed by the driver and the actual transmission flow rate value, and the error may become larger as the range of speed value changes. So once the flow curve correction is completed, the value displayed by the driver is accurate when the motor speed change range is small. When the motor speed change range is too large, the flow curve correction needs to be performed again.
For flexible hoses, Peristaltic pump The curve is very close to a straight line, in this case, the value displayed by the driver can often correspond to the actual transmission flow rate; For the peristaltic pump hose with poor elasticity or coarseness, the linearity error of its curve is often large, so when adjusting the speed range of the driver motor is large, it is necessary to re calibrate the flow curve to obtain relatively more accurate display data.
