The flow measurement of Low price portable ultrasonic flow meter supplier china is simple and convenient. As long as a suitable installation point is selected, the pipeline parameters at the installation point are input on the host, and then the sensor is installed on the pipeline surface according to the installation distance of the sensor provided by the host, and connected to the host with a special ultrasonic cable, the flow measurement can be completed.
The selection of installation point of Low price portable ultrasonic flow meter supplier china is the key to correct measurement. The selection of installation point must consider the influence of the following factors: full pipe, steady flow, scaling, temperature and interference.
1. Full tube
In order to ensure the measurement accuracy and stability, the fluid at the measurement point must fill the pipeline (otherwise the measurement value will be too large or cannot be measured). Therefore, the following conditions shall be met during installation:
The two sensors shall be installed in the horizontal direction of the pipe axis within 45 ° to prevent the normal measurement of the sensors from being affected by insufficient pipes at the upper part, bubbles or sedimentation at the lower part.
2. Steady current
The stable flowing fluid helps to stabilize the measurement, thus ensuring the measurement accuracy. The fluid with chaotic flow state will make the measurement data unstable or impossible to measure.
Meet the standard requirements for steady current conditions:
1) When the pipeline is far from the pump outlet and the valve is half opened, the straight pipe section shall be 10d upstream and 5D downstream (D is the outer diameter).
2) The straight pipe section from the pump outlet and half open valve shall be 30d.
3. Scaling
Scaling on the inner wall of the pipe will attenuate the transmission of ultrasonic signals and make the inner diameter of the pipe smaller. Therefore, the pipe with scale on the inner wall of the pipe will make the flowmeter unable to measure normally or affect the measurement accuracy. Therefore, it is necessary to try to avoid selecting the place where the inner wall of the pipeline is scaling as the installation point. If it is impossible to avoid the scaling installation point, the following measures can be taken to eliminate or reduce the impact of scaling on the measurement of the inner wall of the pipeline.
1) Knock the pipe at the measuring point with a hammer until the signal strength at the measuring point increases significantly.
2) The Z method is selected for measurement, and the scaling is set as the lining to obtain better measurement accuracy.
3) Replace the pipe at the measuring point.
4. Temperature
It is easy to cause damage to the sensor or greatly shorten the service life of the sensor beyond the service temperature range of the sensor. Therefore, the fluid temperature at the installation point must be within the installation and use range of the sensor, and the installation point with lower temperature should be selected as far as possible. Therefore, the same pipeline shall avoid the boiler water outlet and heat exchanger outlet as far as possible and be installed on the return water pipe as far as possible (if conditions permit, it is better to measure the temperature of the installation point before measurement).
5. Interference
The host, sensor and cable of Low price portable ultrasonic flow meter supplier china are easy to be interfered by interference sources such as frequency converter, radio station, TV station, microwave communication station, mobile phone base station and high-voltage line. Therefore, when selecting the installation point of the sensor and the host, try to keep away from these interference sources.


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