When selecting the measuring point, it is necessary to select the pipe section with uniform distribution of fluid flow field to ensure the measuring accuracy. When installing, follow the following principles:
1. Choose a pipe segment filled with fluid, such as the vertical part of the pipe (fluid is best to flow upward) or a horizontal pipe segment filled with fluid.
2. the measurement point should be selected from the upstream 10 times the diameter (10D), the downstream 5 times the diameter (5D) within the uniform straight pipe section, there is no valve, elbow, reducer and other interference flow field devices in the range. The following table is recommended for the straight pipe length.
3. On the horizontal pipe section, the sensor should be installed at the 9 o ‘clock and 3 o ‘clock positions of the pipe, and should avoid the position of 6 o ‘clock and 12 o ‘clock, so as to avoid signal attenuation caused by sediment at the bottom of the pipe or bubbles and air pockets at the top of the pipe.
4. To ensure that the temperature at the measuring point is within the working range.
5. Fully consider the scale of the inner wall of the pipe, as far as possible to choose a non-scale pipe section for measurement, can not fully meet, need to consider the scale as the lining in order to obtain better measurement accuracy.
6. Select a pipe segment with uniform and dense pipes and easy ultrasonic transmission
Post time: Nov-05-2024