Water metering error and correction

Abstract: The water supply measurement error and correction information are provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Keywords: water supply measurement, flowmeter, error and correction In industrial production and life, in order to ensure reasonable and safe distribution of water supply load, and to provide a basic basis for economic accounting, most of the water supply pipelines are equipped with flowmeters for testing. During the design process, . More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the water supply measurement error and correction article. Key words: water supply measurement, flowmeter, error and correction In industrial production and life, in order to ensure reasonable and safe distribution of water supply load, and to provide a basic basis for economic accounting, most of the water supply pipelines are equipped with flowmeters for testing. In the design process, the metering flowmeter is often selected based on the nominal diameter and average flow of the pipeline. Under normal water supply conditions, it can meet the requirements of metering accuracy, but in the actual operation process, there are various operating states, often in the When the installation is completely standardized, there will be a very large measurement error, resulting in a large measurement loss of the water supply unit, and the calibration accuracy of the meter is still within the normal range. The following is only an analysis of several situations encountered by the author in the water supply management. 1. Error and correction of flow measurement in frequency conversion and constant pressure water supply system With the development of frequency conversion technology, more and more water supply enterprises use frequency conversion and constant pressure water supply equipment in water supply engineering. Constant pressure water supply has brought very measurable savings to production and life. Electricity benefit is an inevitable development direction. However, in some water supply areas where the water consumption varies greatly between day and night, the use of variable frequency constant pressure water supply has brought a great impact on the measurement. My unit has a water supply area, and in 1999, the transformation of frequency conversion and constant pressure water supply was carried out. After the renovation is completed, the water supply unit will reduce the monthly water consumption of the current user by 15,000m3 in the settlement of Rizhao compared with before the renovation. At first, the water supply unit believed that the user's production volume decreased and the water consumption also decreased. However, the same was true in the following months. The most used 15,000m3/month less than before, and the lesser used 10,000m3/month less than before. Even if the user's output increased, the water consumption Nothing has changed either. The water supply unit gradually realized the seriousness, carried out careful observation and monitoring, and finally found the proof of the problem. Dg200 water supply pipeline is used in this water supply area, and vortex flowmeter is used for measurement. Under normal water supply status, the meter error is very small. However, from 23:00 to 7:00 the next day, the production and life of users in the area are very small. The water consumption has dropped sharply. It has been observed that when the user's water consumption is less than 80m3/h, the measurement error increases to about -20%, and the water consumption is less than 50m3/h. This is the real reason why the user's water consumption has dropped significantly after constant pressure water supply. It turned out that the range of the vortex flowmeter used by the water supply unit was too narrow, and the problem was not exposed in the previous centralized intermittent water supply. After constant pressure water supply, it cannot meet the requirements of metering under different flow states. When the flow rate is small, the measurement error is too large, that is to say, the critical flow value of the meter is too large, resulting in a large cumulative flow error. After the cause was found out, the water supply unit conducted a serious comparison and analysis, and finally chose an ultrasonic flowmeter with no pressure head loss and a speed measurement range of 0.01-12m3/h to replace the original vortex flowmeter, which fundamentally corrected the flow rate. Measurement errors caused by excessive changes. After more than two years of operation, the measurement has been normal, and the cumulative reduction in measurement loss has reached more than 350,000 m3, and the benefits are very significant. 2. Measurement error and correction of users with small water volume There are many public buildings with large construction area in our unit, but the water consumption is small. However, in the design process, the requirements of the building fire water regulations are also considered. Most of the water supply pipelines are above Dg100, and the metering water meters of the same caliber are also used. Under the actual normal water supply situation, the user's water consumption deviates greatly from the water supply capacity of the water supply pipe. Most of them are below the critical flow rate of the meter, and even lower than the minimum flow rate of the meter in some places, resulting in a large measurement error. In response to this problem, we use the following two methods to solve it. (1) Split water supply According to the user's daily water load, one route of daily water pipeline is reconfigured as needed, which not only ensures the normal water demand, but also solves the problem of large measurement error, and does not affect the safety of fire water. There is a big problem with this kind of transformation: the investment is large and the transformation is difficult. It is suitable for construction and renovation with simple water layout. (2) The transformation of large pipes and small meters is very difficult to transform by means of shunts. Sometimes we also use the method of replacing the meters with small-caliber meters for transformation. The replacement of the meter diameter needs to be calculated to ensure that the flow and the pressure behind the meter have little influence and do not violate the fire protection requirements. In this way, although the measurement error cannot be fundamentally eliminated,But it also corrected the error to a large extent.

mass flow meter has become a crucial product for marketers, especially when it comes to brand building and engaging potential customers.

Beijing Sincerity Automatic Equipment Co., Ltd is working with the best teams, aligned with international standards and practices to focus on R&D and manufacture of products, and are continuously launching new products in the market. Get to know us at Sincerity Flow Meter.

Beijing Sincerity Automatic Equipment Co., Ltd has been focusing on reaching the ideal profits.

Beijing Sincerity Automatic Equipment Co., Ltd’s model also predicts (i) a positive effect of management on firm performance; (ii) a positive relationship between product market competition and average management quality (part of which stems from the larger covariance between management with firm size as competition strengthens); and (iii) a rise (fall) in the level (dispersion) of management with firm age.