Product Code: DT-090 Product Name: DT-090 electromagnetic flowmeter Product Type: electromagnetic flowmeter I. Overview electromagnetic flowmeter is a volume flow measurement of conductive medium for induction meter, according to Faraday's principle of electromagnetic induction, with measuring tube axis and the magnetic field lines installed perpendicular to the wall of a pair of sensing electrodes, when the conductive liquid tube axis motion along the measurement, the conductive liquid cutting magnetic field lines generated EMF, the EMF by two sensing electrodes detected, the numerical size with the flow ratio. In addition to measure the volume flow of conductive liquid, it can also be used to measure the volume flow of homogeneous liquid-solid two-phase liquid suspension of acid, alkali and other strong corrosive liquids and slurries, pulp and paper pulp. Widely used in flow measurement in petroleum, chemical, metallurgy, textile, paper making, environmental protection, food industry and municipal administration, water conservancy construction, river dredging and other areas. Second, product characteristics 1, measurements and velocity distribution of physical parameters of fluid pressure, temperature, density and viscosity. 2, the multi-electrode design, to further ensure accuracy. 3, no moving parts inside the pipe, unimpeded flow of parts, measuring almost no additional pressure loss. 4, high-resolution backlit LCD display, full Chinese menu operation, easy to use, simple to operate, easy to understand. 5, the converter core with high-speed CPU, computing speed, high precision, low frequency square wave excitation, improves the stability of flow measurement, low power consumption. 6, all-digital processing, anti-interference ability, reliable measurement, high accuracy. 7, ultra-low EMI switching power supply, power supply voltage range, anti-EMC good. 8, the use of EEPROM memory, internal clock has not power down, can record power-down time, measurement data storage secure and reliable operation. 9. Bi-directional measurement system can measure forward flow, reverse flow. 10, password latch function, after the meter is powered, if set parameters, you must enter the password in order to operate. 11, converter with self-diagnostic alarm output function, empty load detection alarm output. 12, plug-in structure, easy to install, without drying, field installation Tapping (1M P a less), economical, convenient and suitable for medium and large diameter pipeline flow measurement. 13, low-cut function, users can set excision small interfering flow 14, zero self-calibration by a display panel, eliminate the zero drift. Third, the technical parameters nominal diameter range DN (mm) ● Ambient temperature: Sensor: -40 ℃ ~ + 80 ℃, DN15-3200, plug-≥DN200 converter: -25 ℃ ~ + 60 ℃ Note: Special specifications can be customized Plug-In: -25 ℃ ~ + 60 ℃ ● Flow direction: positive and negative net flow ● communication interface: ± 0.1% of measured value ● Conductivity range:: RS232, RS485, HART ● repeatability error measured fluid conductivity Rate ≥5μs / cm most water ● Accuracy: Pipeline: 0.2, 0.5 1.0 (based on caliber division) for the media components, the conductivity 200 ~ 800μs / cm plug-in: the range of 2.5, both choice of electromagnetic flowmeters ● measured medium temperature: ordinary rubber lining: -20 ℃ ~ + 60 ℃ ● output current and load resistance: 4 ~ 20mA fully isolated high temperature rubber lining: -20 ℃ ~ + 90 ℃ load resistance <750Ω poly tetrafluoroethylene lining: -30 ℃ ~ + 180 ℃ pulse frequency: 0 ~ 1KHz (load resistance ≥3000Ω) high temperature vinyl lining: when -30 ℃ ~ + 200 ℃ optically isolated external power ≤35V OCT medium temperature greater than 120 ℃ orders NOTE ● Electrode material:! molybdenum-containing stainless steel, titanium, tantalum, Hastelloy, platinum ● rated working pressure: or other special electrode materials pipeline: DN10-DN50: ≤4.0MPa, DN65-DN400: ● Protection class: diving : IP68, other types IP65 ≤1.6MPa, DN450-DN600: ≤1.0MPa, ● Power supply: AC220V 50Hz, DC24V DN650 above: ≤0.6MPa ● straight pipe length: Pipeline: Upstream ≥5D, downstream ≥2D plug-in: ≥DN80 0.25MPa-25MPa ● Connection: Pipe: GB9119-2000 standard flange pressure specification when ordering special instructions to insert the formula: threaded connection, ball Specifications: DN50 ● flow measurement range: flow measurement range corresponds to the speed range ● Explosion-proof mark : ExdⅡBT4 0.5 ~ 10m / s ● Relative humidity: 5% ~ 95% RH ● Pipeline: 0.5 ~ 10m / s, recommend 1 ~ 5m / s; ● total power consumption: ≤20W ● Plug-in: 0.5 ~ 10m / s ● Electrical Interface: M20 × 1.5 thread four confirmed ⑴, instrument selection Product selection 1. instrumentation applications range is very important work, the instrument has practical applications in two-thirds of the fault is the instrument error election type and installation errors caused by working conditions require special attention. ⑵, according to the name of the measured fluid, the maximum temperature, the normal operating temperature, the minimum temperature selection lining and electrode material. ⑶, the maximum flow, normal flow, choose the size of the diameter of the minimum flow. ⑷, the range should be greater than the expected maximum flow rate, and the normal flow value slightly larger than the 50% of full scale of the meter is appropriate. ⑸, maximum working pressure: The actual maximum working pressure must be less than the rated working pressure flowmeter. ⑹, additional features and other ancillary requirements for selection: manufacturers decide production requirements. ⑺, measured clean water, economic velocity is 1.5-3m / s, measured and crystallization of the solution, should be appropriately increase the flow rate, 3-4m / s is appropriate, play a self cleaning action to prevent the adhesion of deposition, measured When pulp and other fluids wear should be appropriate to reduce the flow rate, 1.0-2m / s is appropriate, in order to reduce wear on the lining and electrodes. Practice rarely more than 7m / s, more than 10m / s is more rare. The best way to increase the flow rate using the reduction of the flow rate of less than 0.5m / s. ⑻, practice, split from the shorter the better, the cable is too long, affected by the distributed capacitance, it is likely to cause interference, usually not more than 100 meters. 2. Select the lining material lining material main properties medium temperatures Scope - Body isolated polytetrafluoroethylene (F4 is the most stable chemical properties of a plastic, the ability of boiling hydrochloric acid, sulfuric acid, nitric acid and aqua regia, also resistant to concentrated alkali and various organic solvents. impatience chlorine trifluoride, chlorine trifluoride high temperature, high velocity liquid fluorine, oxygen, since oxygen corrosion. 70 ℃ 100 ℃ 150 ℃ to be special order 1, the concentrated acid, alkali and other strong corrosive media. 2, health media category. poly FEP (F46 with F4, wear resistance, higher suction capacity F4. 70 ℃ 100 ℃ 150 ℃ to be special order 1, the concentrated acid, alkali and other strong corrosive medium 2, health media category. polyvinyl fluoride co-ethylene (Fs applicable temperature limit lower than the Teflon, but the cost is lower. 70 ℃ 80 ℃ neoprene 1, and has excellent flexibility, highly tear breaking strength, wear resistance .2 resistance generally low concentration of acid, alkali, salt corrosion media, intolerance oxidizing medium corrosion. 70 ℃ 80 ℃ 120 ℃ to be special order water, sewage, weak abrasive slurry pulp. Polyurethane 1, strong wear resistance 2, poor corrosion resistance 70 ℃ 80 ℃ neutral strong wear pulp, coal slurry, mud 3. The electrode material of choice: should be based on the measured medium corrosive, wear sex, selected by the user, the general media, check the manual related to corrosion, selected electrode material; mixed acid and other ingredients for the media, should be hanging patch test electrode materials for corrosion and wear resistance of stainless steel 0Crl8Nil2M02Ti industrial water and life. water, sewage and other media with weak corrosive for petroleum, chemical, steel and other industrial sectors and, municipal, environmental protection and other fields Hastelloy B for all concentrations below the boiling point of hydrochloric acid has good corrosion resistance, but also resistance to sulfuric acid , phosphoric acid, hydrofluoric acid, organic acids and other non-chlorinated acid, alkali, non-oxidizing salt solution corrosion. Hastelloy C resistant to non-oxidizing acid, such as nitric acid, mixed acid, chromic acid and sulfuric acid or mixed media of corrosion, oxidation resistance also salts such as: Fe, ",, Cu" under or contain other corrosive oxidants such as hypochlorite solution is higher than normal temperature, corrosion resistant titanium sea water, a variety of chloride and hypochlorite salts, oxidizing acids include fuming sulfuric acid, an organic acid, alkali corrosion. intolerant purer reducing acid such as sulfuric acid, hydrochloric acid corrosion, but as an acid containing an oxidizing agent such as nitric acid, Fc ++, Cu ++, then great corrosion To reduce the tantalum has excellent corrosion resistance and the glass is very similar except hydrofluoric acid, fuming sulfuric acid, alkali, almost capability - cut chemical mediators including boiling hydrochloric acid, nitric acid and sulfuric acid l 50 ℃ less corrosion. Diao in alkali; corrosion resistant platinum / titanium nearly capability - cut chemical media, but not for aqua regia and ammonium salts of stainless steel coated with tungsten carbide for non-corrosive, strong abrasive media Note: Because... a wide range of media, but also by its corrosive temperature, concentration, flow rate and other complex factors change, so the table is for reference only. Users should make their own choices based on the actual situation, as necessary to do to be selected materials corrosion tests, such as coupon testing. The degree of protection selected according to GB GB4208-84≈ International Electrotechnical Commission IEC standards (IEC529-76) on the housing protection class can be divided into: ⑴, IP65 for the anti-spray type, it can allow the tap water from any direction on the instrument , water pressure of 30kPa (0.3bar). The amount of water is 12.5 l / min, the instrument vents from a distance of 3 meters. ⑵, IP67 to prevent flooding type, that instrument can short all immersed in water, the test should be the highest point in the water of at least 150cm, a duration of at least 30 minutes. ⑶, IP68 diving type, should be long-term work in the water, the maximum depth of immersion of consultation by the manufacturer and the customer. ⑷, protection class selection principles should be selected according to the actual conditions of the above requirements and instrumentation. If the meter below ground, often affected by flooding, should use IP68; if the meter is installed above ground can be used IP65. 5. Reference flow range flow range table diameter mm m3 / h flow range mm diameter m3 / h φ15 0.06 ~ 6.36 φ450 57.23 ~ 5722.65 φ20 0.11 ~ 11.3 φ500 70.65 ~ 7065.00 φ25 0.18 ~ 17.66 φ600 101.74 ~ 10173.6 φ40 0.45 ~ 45.22 φ700 138.47 ~ 13847.4 φ50 0.71 ~ 70.65 φ800 180.86 ~ 18086.4 φ65 1.19 ~ 119.4 φ900 228.91 ~ 22890.6 φ80 1.81 ~ 180.86 φ1000 406.94 ~ 40694.4 φ100 2.83 ~ 282.60 φ1200 553.90 ~ 55389.6 φ150 6.36 ~ 635.85 φ1600 723.46 ~ 72345.6 φ200 11.3 ~ 1130.4 φ1800 915.62 ~ 91562.4 φ250 17.66 ~ 176.25. φ2000 1130.4 ~ 113040.00 φ300 25.43 ~ 2543.40 φ2200 1367.78 ~ 136778.4 φ350 34.62 ~ 3461.85 φ2400 1627.78 ~ 162777.6 φ400 45.22 ~ 4521.6 φ2600 1910.38 ~ 191037.6 five product spectrum caliber electromagnetic flowmeter model DT-090 15 ~ 2600 Code install F-one split in the form of Y code converter model ZA ZB round square Code Output signal I.4 4 ~ 20mA f frequency 1KHz Rs serial communication (485) C control output code EX explosion proof requirements N no proof (only in Split) Code medium temperature T1 ≤65 ℃ T2 ≤120 ℃ T3 ≤180 ℃ (only for split) Code lining materials NE Neoprene (≤65 ℃) PTFE Teflon (≤189 ℃) PVC Polyvinyl chloride (≤70 ℃) Code electrode material 316L stainless steel, Hastelloy C HB HC Hastelloy B Ti Ti Ta Ta