At present, in the ultrasonic flowmeter industry, there is a mixture of fish and dragons. In the flowmeter industry forum, everyone has different opinions and opinions.
After the end of the technical exchange, under the joint invitation of a metrology test institute and a water bureau, the engineering test of Shanghai Senyi Intelligent Instrument Co., Ltd. took the experiment of several products represented by the company together with the engineers of several other manufacturers. stage.
The first experimental site conditions: sewage treatment plant, drainage pipe, DN1800mm, carbon steel pipe, non-woven fabric and asphalt coating on the outer wall of the pipeline; in order not to attack other brands, and objectively and truthfully record the experimental results, here Only the performance and data of several ultrasonic flowmeters represented by our company are listed.
1. Premise: Do not remove the outer wall coating of the pipeline, SY-320 ultrasonic flowmeter, without any signal and reading; FLEXIM ultrasonic flowmeter F601, the signal is normal, the reading is normal, the reading value and the error of the on-site electromagnetic flowmeter is +3.15% .
2. Premise: Remove the outer wall coating of the pipe, SY-320 ultrasonic flowmeter, have signal, read normal, the comparison error with the on-site ultrasonic flowmeter is +3.7%, taking into account the error of the ultrasonic flowmeter, and the electromagnetic flowmeter The error is superimposed. This reading is barely acceptable; the error of the FLEXIM ultrasonic flowmeter is +0.52%.
Summary of the experiment: Through this experiment, it is easy to analyze the direct impact of the on-site working conditions on the measurement results. After the experiment, the director of the Drainage Management Office under a water bureau issued a feeling to the personnel who observed the situation: in the field measurement process It must not be used to save trouble, in order to be quick, and not to deal with the working conditions. This kind of testing without treating the site conditions is irresponsible for all water, treated water and existing equipment.
The second test site working conditions: high temperature test site, a printing and dyeing factory, DN219, carbon steel pipe, medium is heat transfer oil, the temperature is 310 degrees, because for high temperature fluid testing, only FELXIM ultrasonic flowmeter can test high temperature fluid, this The second time is that different people operate the same set of equipment and compare the measurements in the same working condition.
Group A: A technician of an ultrasonic flowmeter observes our company's operation of the FLEXIM ultrasonic flowmeter and then operates.
Group B: The technical staff of Shanghai Senyi Intelligent Instrument Co., Ltd. has the experience of skilled operation of FLEXIM ultrasonic flowmeter. It has rich experience in high temperature fluid testing and gas medium testing.
First, group B personnel operate, after 5 minutes of pipeline surface treatment, nearly 10 minutes of high temperature waveguide installation, 5 minutes of flow sensor installation and host debugging, the signal is 4 grids, very good, the reading is very stable, and the scene The error of a plug-in table comparison is: -0.475%. In group B, during the operation of the personnel, group A personnel observe and record the operation steps.
Group A personnel began to operate. After nearly 30 minutes of installation and commissioning, the data came out, but the reading and the default standard table error was +2.65%. After the guidance of Group B professionals, Group A personnel performed the second independent installation. Commissioning, the final reading is out, the reading and the standard table error is -0.45%.
Summary of the experiment: the same working condition, the same equipment, different people measured, the effect is very different. When doing flow test, especially the third-party testing institutions such as measuring institutions, such as boiler and pressure vessel inspection and research institutes, measurement and testing institutes, must be guided and trained by professional testers to achieve the precision and function of the instruments. After the training and communication of professional and technical personnel, the use of the instrument is easy, and the effect of purchasing the instrument can be achieved.
The above experimental analysis, only for reference, in the selection process of the ultrasonic flowmeter, must be based on the actual working conditions, the actual application selection, there is no law. Only in the right working conditions, choose the appropriate ultrasonic flowmeter, in order to do the best, if you have encountered relevant problems in the selection process, you can contact our professional and technical personnel at 021-61073318.
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Shanghai Senyi Intelligent Instrument Co., Ltd. (Technology Department)
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