Abstract: how to through the ultrasonic wave to detect the electromagnetic
flow meter scale information produced by excellent flow meter, flow meter manufacturer to offer you the quotation.
To facilitate on-line detection of electromagnetic flowmeter, we suggest for the new line can be configured during system design standard measure section for on-line detection of electromagnetic flowmeter in the future.
The installation of the standard measurement section should to meet the ultrasonic flowmeter to before.
More flow meter manufacturers choose model price quote you are welcome to inquire, here is how to through the ultrasonic wave to detect the electromagnetic flow meter scale article details.
To facilitate on-line detection of electromagnetic flowmeter, we suggest for the new line can be configured during system design standard measure section for on-line detection of electromagnetic flowmeter in the future.
Standard measurement section of the installation should be to meet the demand of the straight pipe before and after ultrasonic flowmeter for the premise, should pay attention to ensure liquid filled with measuring pipeline.
Pipe parameters at the same time, the material of pipeline, pipe diameter, wall thickness, tube material and thickness of the lining for record.
The original old line, can be in the pipeline under test to select a better meet the conditions of ultrasonic flowmeter using measurement point, a stainless steel tube, installation of stainless steel pipe parameters recorded at the same time.
By using legal institutions for verification qualified ultrasonic flow meter as a standard table online, to determine the measurement accuracy of the measured electromagnetic flowmeter.
For sewage electromagnetic flowmeter can choose commonly periods of low suspended solids, and keep the liquid temperature is stable, when conditions permit available water check in order to improve the measuring precision of ultrasonic flowmeter.
How to guarantee the accuracy of on-line detection by experiment we think can begin from the following points, to ensure the accuracy of electromagnetic flowmeter on-line inspection: 1, the preparation work before on-line detection.
1, when choosing probe installation position should satisfy the following conditions: (
1)
The workplace without too much dust and corrosive gas;
(
2)
Straight pipe length: upstream side more than 10 d, downstream l5D measurement above (
When flow velocity is low, can decrease the straight pipe requirements)
；
(
3)
Upstream side of 30 d disturbance factors, can not have
Such as pump, valve, etc. )
；
(
4)
The fluid must be full of pipes, not to bubble or excessive impurities;
(
5)
Install the probe pipeline should not have strong mechanical vibration;
(
6)
Install the probe pipe need enough space around.
2, the material of test line, pipe diameter, wall thickness, pipe lining material and thickness, tube medium, medium temperature related amount of accurate numerical requirements in the test field measurement and verification to ensure measurement accuracy.
3, the common flow point of working conditions on site, so that users are commonly used traffic point for testing, improve the accuracy of the on-line detection.
4, choose the basic principle of ultrasonic flowmeter for on-line detection for the standard table method, so the ultrasonic flowmeter should be regularly to the national legal metrological verification institutions for verification, and achieve effective verification certificate.
2, online test this is a strong technical and empirical requirements are working, so need to strict training of inspectors, special requirements for the staff to go in line with the attitude of science for on-line detection work.
In the process of actual use, we found that the measurement is not accurate are mostly caused by improperly installed probe.
Therefore, properly installed probe becomes * a problem, we considered the following a few probe shall follow the principle of the installation process.
(
1)
For horizontal pipe, the probe shall be installed in a horizontal centerline of & plusmn;
45°
Within;
(
2)
Install the probe should be avoided in the pipeline deformation of the parts and flanged or welded parts;
(
3)
Prior to installation shall be carried out to probe the installation surface processing, first remove rust, dirt, etc. (on the surface of the pipe
A protective layer on the surface pipelines, should be first strip protective layer)
, smooth wall surface with no dirt.
Cleaning scope shall be installed to probe distance L + 200 mm width of the circumference of a circle;
(
4)
The coupling agent of probe, the whole surface of launch, do not form a bubble;
(
5)
In the pipeline surface coated with silicon grease;
(
6)
Place the probe firmly stick on the wall, with steel belt fixed probe (
Note: the launch of two probe direction must be relatively)
。
Will go through field measurement to verify the condition of parameter input flow meter and check the signal reception, after work is normal, before starting test.
Detection according to the different flow of traffic is commonly used to determine points, can be adjusted by the water pump or valve, and at the same time gathering standard table and checked meter the flow of value to determine the error value detected flowmeter.
When read flow display value, shall be carried out on the flow stability, and at the same time the display value read 10 or so, take the average to reduce the error brought about by the readings.
Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.
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