零流量的检查 (1) Zero flow inspection
左右，自动切除。 When the liquid in the pipeline is still, and there is no strong magnetic field interference or strong vibrations around the meter, the meter head shows zero. At this time, it is automatically set to zero to eliminate zero drift. Small signals need to be cut off during operation. Generally, the flow is less than full range About 5% of the flow is automatically removed. The zero point can also be adjusted through the menu.
仪表面板键盘操纵 (2) Instrument panel keyboard operation
Before starting the operation of the instrument, the first task is to effectively set the parameters, such as: using the unit system, the installation method, the material of the pipeline, the roughness of the pipeline, the diameter of the pipeline, the wall thickness of the pipeline, and the distance between the two probes. , Unit of flow rate, type of fluid, maximum speed, minimum speed, etc. Only when all parameters are entered correctly, the meter will correctly display the actual flow value
流量计的定期校验 (3) Periodic calibration of flow meters
We check regularly to ensure the accuracy of the flowmeter. 误差=(丈量值-标准值)/标准值，利用计算的相对误差，修正系数，使得丈量误差在±2%左右，这样就可以满足计量要求。 In general, we will use a more accurate portable flow meter for direct comparison with the measured data : error = ( measurement value - standard value ) / standard value, use the calculated relative error, and modify the coefficient to make the measurement error It is about ± 2% , so that it can meet the measurement requirements. The operation is simple and convenient, which can effectively improve the accuracy of measurement.
The models of ultrasonic flowmeters sold by Jiangsu Jinhu Dongxiang Instrument are: Doppler ultrasonic flowmeters Handheld ultrasonic flowmeter Portable ultrasonic flowmeter Fixed integrated basic ultrasonic flowmeter, etc.