Which flow meter is best for measuring water?

Water is an essential survival resource in our lives, and it is also essential for water resources used by enterprises. There are many types of the same water, such as sewage, tap water, ammonia water, fire water, air conditioning water, circulating water, hot water, cooling water. Water, waste water, irrigation water, mineral water, etc., what kind of flowmeter is better for users to use for so many different types of water? At present, electromagnetic flowmeters are mostly used in water measuring flowmeters. It is an excellent flowmeter product used to measure water flow. The application of electromagnetic flowmeters for measuring water is also very extensive. In the practical application of water measurement engineering, the correct installation of the grounding is an extremely important link for the normal operation and measurement accuracy of the electromagnetic flowmeter. 1. The importance of grounding Since the electromagnetic flowmeter measures a weak potential, it is necessary to eliminate all external interference to accurately measure it. Therefore, a good grounding is a necessary condition to ensure the stable operation of the tap water flowmeter. Grounding is usually accomplished through a grounding ring or a ground connection between the internal electrodes within the sensor and the piping system. 1. When the electromagnetic flowmeter is installed on the grounded metal pipeline, the system potential balance is realized through the grounding terminal on the tap water flowmeter transmitter, that is, the copper core wire with a cross-sectional area of u200bu200bnot less than 6mm2 is connected to the grounding terminal. 2. When the electromagnetic flowmeter is installed on an ungrounded metal pipe, the two flanges are connected to the pipe flange through a copper core wire with a cross-sectional area of u200bu200bat least 6mm2, and grounded; connect the transmitter or sensor junction box to the On the ground terminal, the system potential can be balanced. 3. When the electromagnetic flowmeter is installed on a plastic pipe or a pipe with an insulating lining, the system potential can be balanced by an additional grounding ring, which is connected to the grounding terminal through a copper core wire with a cross-sectional area of u200bu200bat least 6mm2. 4. If the site environment is special, you can ask the manufacturer to customize three electrodes, one of which is a grounding electrode, so that the grounding can be realized directly from the inside of the pipeline. 2. Different water requirements for straight pipe sections In order to ensure the normal operation of the electromagnetic flowmeter and reduce measurement errors, the electromagnetic flowmeter should meet certain straight pipe section requirements before and after. According to the test standard requirements of JJG 1033-2007 'Electromagnetic Flowmeter Approval RegulationsNot less than 5D, and the rear straight pipe section is not less than 3D. 3. Points for attention to the installation location of different water Usually, the electromagnetic flowmeter design should pay special attention to the following points: 1. The electromagnetic flowmeter should be installed in a position where the measuring conduit can be filled with liquid at any time, so as to prevent the measurement There is no fluid in the catheter, creating the illusion that the pointer is not at zero. It is best to install it vertically to reduce errors caused by the liquid flowing through and creating air bubbles on the electrodes. 2. When gas accumulation or bubbles appear in the measuring tube of the electromagnetic flowmeter, the measurement error will be increased, so it is necessary to avoid installing the electromagnetic flowmeter sensor at the high point of the pipeline. 3. Water is a self-fluid. The vertical installation of the water inlet must be correct from bottom to top. If it is wrong from bottom to bottom, it will not only dissatisfy the pipe, but also seriously affect the water measurement accuracy. 4. Comparing quality between correct installation and wrong installation is the premise, installation is the key, and precautions are the guarantee. We use the comparison method to let users have a more intuitive feeling.

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