dn80 intelligent electromagnetic flowmeter

dn80 intelligent electromagnetic flowmeter is an electromagnetic flowmeter with a pipe inner diameter of 80mm, an electromagnetic flowmeter with direct display, temperature compensation, intelligent output and remote transmission functions. It is often used in the flow measurement of sewage/wastewater/tap water/mud/paper pulp, etc. Due to its characteristics of electromagnetic induction principle, it can be measured as long as it is a conductive medium, so its application range is very wide.　　So what should I pay attention to when using the dn80 intelligent electromagnetic flowmeter? 　　1/Selection of caliber and range　　The transmitter caliber is usually the same caliber as the piping system. If the share channel system needs to be designed, the caliber can be selected according to the flow mother range and flow rate. For the electromagnetic flowmeter, the flow velocity is more suitable to be 2-4m/s. In special circumstances. If there are solid particles in the liquid, taking into account the abrasion, the usual flow rate ≤ 3m/s can be selected. For the fluid that is easy to attach to the pipe wall, the flow rate ≤ 2m/s can be selected. To determine the diameter of the transmitter.　　The range of the transmitter can be selected according to two principles: one is that the full scale of the instrument is greater than the expected maximum flow value, and the other is that the normal flow value is greater than 50% of the full scale of the instrument to ensure a certain measurement accuracy. 2/ Lining selection The correct selection method of the lining material of the electromagnetic flowmeter should be based on the corrosiveness, abrasion and temperature of the measured medium to choose the lining material: 　　1, natural rubber (soft rubber)　　1, better elasticity, abrasion resistance And tearing force 2, resistance to general weak acid, weak alkali corrosion 3, water test, sewage 2, acid-resistant rubber (hard rubber) 　 　 can be resistant to hydrochloric acid, acetic acid, oxalic acid, ammonia, phosphoric acid and 50% sulfuric acid, hydrogen at room temperature Corrosion of sodium oxide and potassium hydroxide, but not resistant to strong oxidants. Test general acid, alkali, salt solution 3. Neoprene (Neoprene)　　 1. Excellent elasticity, high breaking force, good wear resistance 2. Resistant to the corrosion of low-concentration acid, alkali and salt solution, but not resistant to the corrosion of oxidizing medium <80℃; 　　 test water, sewage, mud and ore pulp 4. Polyurethane 　　 1. Excellent resistance Grinding performance 2. Poor acid and alkali resistance <40℃　　 test neutral and strong abrasion coal slurry, mud and ore slurry 5. Polytetrafluoroethylene (PTFE)　　1, boiling resistant hydrochloric acid, sulfuric acid, nitric acid, aqua regia, concentrated alkali and Various organic solvents 2. Good abrasion resistance, poor bonding performance -80～+180℃; 　　 measure concentration, strong alkali, strong corrosive solution and sanitary medium 3/application site selection 1. Understand the process parameters (1) Understand Name of the measured liquid (provided by the user) 　　 (2) Know the maximum flow, common flow, and minimum flow of the liquid to be measured (provided by the user) 　 　 (3) Know the process pipe diameter (provided by the user) 　 　 (4) Know the medium temperature (by the user) Provided by the user) 　　 (5) Understand the medium pressure (provided by the user) 　　 (6) Understand the conductivity of the measured fluid (provided by the user) 　　 (7) Understand whether there is negative pressure (provided by the user) 　　 2. Preliminary selection ( 1) According to the name and nature of the measured medium, determine whether to use an electromagnetic flowmeter (determined by the salesperson) 　　 Note: The electromagnetic flowmeter can only measure the flow of conductive liquids, but gases, oils and most organic liquids are not Examples of general conductive liquids (2) Determine the electrode material according to the learned properties of the medium. Pay attention; the company generally provides four types of electrodes, such as stainless steel, Hastelloy, titanium and tantalum. Which electrode should be selected according to the properties of the medium. 2) Determine whether to use rubber or PTFE lining according to the learned temperature of the medium (determined by the salesperson) 　　 Note: The temperature resistance of rubber shall not exceed 80C; 　　Tetrafluoride temperature resistance is 150C, and the instantaneous resistance is 180C; 　　Urban sewage generally can use rubber lining And stainless steel electrode (3) According to the learned medium pressure, choose the flange specification of the meter body (determined by the salesperson) 　　 Note: The electromagnetic flange specification is usually when the caliber is DN10-250, the flange rated pressure ≤ 1.6Mpa; 　　 when When the caliber is DN250-1000, the flange rated pressure is ≤1.0Mpa; 　　 when the actual pressure of the medium is higher than the above-mentioned pipe diameter-pressure corresponding range, It is a special order, but the maximum pressure shall not exceed 6.4Mpa　　 (4) Determine the conductivity of the medium. Note: (1) The conductivity of the electromagnetic flowmeter shall not be lower than 5uS/cm　　 (2) The conductivity of tap water is about tens to hundreds One uS/cm, general boiler soft water (deionized water) conducts electricity, pure water (highly distilled water) does not conduct electricity (3) The electrical conductivity of gases, oils and most organic liquids is much lower than 5uS/cm, so they do not conduct electricity. 3. Understand user requirements (1) Understand whether it is a combined local display or a split remote display (provided by the user) 　　 Note: Please understand the maximum distance when it is a split remote display, and the maximum separation distance is 100 meters (2) Understand whether other additional functions are needed (provided by the user) 　　 Note: 1. The electromagnetic flowmeter itself has the upper and lower limit flow alarm, frequency and current output functions, no special order is required. 2. The electromagnetic flowmeter housing sealing protection level is IP65 and IP68. It is a special order when the submersible IP68 is selected. 3. When the electromagnetic flowmeter is to be connected to the computer, the RS-485 communication port needs to be added, which is a special order
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