| 3151壓力/差壓液位儀表百科:壓力變送器和液位變送器的區(qū)分 |
| 信息來(lái)源： 液位變送器 | 2020-06-12 點(diǎn)擊量： 6444 |
西安華恒變送器制造商已經(jīng)開發(fā)出傳感器和智能電路板這兩項(xiàng)核心技術(shù)。 不僅掌握了所有產(chǎn)品的所有核心組件技術(shù)，而且工業(yè)自動(dòng)變送器制造商的精度也在不斷提高，從0.2提高到0.1。 通過(guò)擴(kuò)展精通的核心技術(shù)，它還可以改變其他測(cè)量流量和溫度的產(chǎn)品
Xi'an Huaheng transmitter manufacturer has developed two core technologies, sensor and intelligent circuit board. Not only master all core component technologies of all products, but also the accuracy of industrial automatic transmitter manufacturers is constantly improving, from 0.2 to 0.1. It can also change other products that measure flow and temperature by expanding the core technology of mastery
3151壓力/差壓液位儀表百科:壓力變送器和液位變送器的區(qū)分/解下壓力變送器、差壓變送器原理
3151 Encyclopedia of pressure / differential pressure level instruments: distinction between pressure transmitter and level transmitter / principle of pressure transmitter and differential pressure transmitter
3151壓力/差壓液位儀表百科:壓力變送器和液位變送器的區(qū)分/、壓力變送器原理
3151 Encyclopedia of pressure / differential pressure level instruments: distinction between pressure transmitter and level transmitter / principle of pressure transmitter
壓力變送器感受壓力的電器元件一般為電阻應(yīng)變片，電阻應(yīng)變片是一種將被測(cè)件上的壓力轉(zhuǎn)換成為一種電信號(hào)的敏感器件。電阻應(yīng)變片應(yīng)用最多的是金屬電阻應(yīng)變片和半導(dǎo)體應(yīng)變片兩種。金屬電阻應(yīng)變片又有絲狀應(yīng)變片和金屬箔狀應(yīng)變片兩種。通常是將應(yīng)變片通過(guò)特殊的黏合劑緊密地粘合在產(chǎn)生力學(xué)應(yīng)變基體上，當(dāng)基體受力發(fā)生應(yīng)力變化時(shí)，電阻應(yīng)變片也一起產(chǎn)生形變，使應(yīng)變片的阻值發(fā)生改變，從而使加在電阻上的電壓發(fā)生變化。
The electrical components of pressure transmitter to sense pressure are generally resistance strain gauge, which is a kind of sensitive device that converts the pressure on the tested part into an electrical signal. The most widely used resistance strain gauge are metal resistance strain gauge and semiconductor strain gauge. There are two kinds of metal resistance strain gauge: wire strain gauge and foil strain gauge. Generally, the strain gauge is tightly bonded to the mechanical strain matrix by a special adhesive. When the stress of the matrix changes, the resistance strain gauge will also deform together, so that the resistance of the strain gauge changes, so that the voltage applied to the resistance changes.
3151壓力/差壓液位儀表百科:壓力變送器和液位變送器的區(qū)分/、差壓變送器
3151 Encyclopedia of pressure / differential pressure level instruments: distinction between pressure transmitter and level transmitter / differential pressure transmitter
差壓變送器所測(cè)量的結(jié)果是壓強(qiáng)差，即△P=ρg△h。而由于油罐往往是圓柱形，其截面圓的面積S是不變的，那么，重力G=△P·S=ρg△h·S，S不變，G與△P成反比關(guān)系。即只要準(zhǔn)確地檢測(cè)出△P值，與液位高度h成反比，與高度差△h成正比，在溫度變化時(shí)，雖然油品體積膨脹或縮小，實(shí)際液位升高或降低，所檢測(cè)到的壓力始終是保持不變的。
The result measured by the differential pressure transmitter is the pressure difference, that is, △ P = ρ g △ H. Since the oil tank is usually cylindrical, the area s of its section circle is constant. Then, the gravity g = P · s = ρ g △ h · s, s is constant, and G is inversely proportional to △ P. That is to say, as long as the value of △ P is accurately detected, it is inversely proportional to the height h of the liquid level, and directly proportional to the height difference △ h. When the temperature changes, although the volume of the oil expands or shrinks, the actual liquid level rises or falls, the detected pressure remains unchanged.
投入式液位計(jì)安裝與調(diào)試
Installation and commissioning of input liquid level meter
1、變送器可垂直、傾斜或水平安裝在罐體、槽內(nèi)，應(yīng)注意不讓泥沙埋沒(méi)或堵塞膜片;
1. The transmitter can be installed vertically, obliquely or horizontally in the tank body and groove, and attention shall be paid not to allow sediment to bury or block the diaphragm;
2、在介質(zhì)波動(dòng)較大的場(chǎng)合，應(yīng)采取固定措施，如采用也ф12的防波管;
2. In case of large fluctuation of medium, fixed measures shall be taken, such as anti wave tube of ф 12;
3、導(dǎo)氣電纜除作為電源和信號(hào)轉(zhuǎn)換外，主要為引人大氣補(bǔ)償用，安裝時(shí)注意不要挾持過(guò)緊，折彎過(guò)銳;
3. In addition to being used as power supply and signal conversion, the air conducting cable is mainly used for air induction compensation. Pay attention not to hold it too tightly and bend it too sharply during installation;
4、殼體垂直安裝在罐體上方或附近的支架上，應(yīng)保證防曬透氣，安裝位置應(yīng)便于接線與調(diào)校。
4. The shell is vertically installed on the bracket above or near the tank body, which shall ensure sun protection and ventilation, and the installation position shall be convenient for wiring and adjustment.
5、本產(chǎn)品在出廠時(shí)已經(jīng)校準(zhǔn)，其零點(diǎn)是相對(duì)于河南地區(qū)的大氣壓，滿點(diǎn)是在一個(gè)大氣壓下的相對(duì)壓力。若需要現(xiàn)場(chǎng)調(diào)整可采取以下方法：
5. This product has been calibrated at the time of delivery. Its zero point is relative to the atmospheric pressure in Henan area, and its full point is relative pressure under one atmospheric pressure. If field adjustment is required, the following methods can be adopted:
現(xiàn)場(chǎng)調(diào)零------當(dāng)液位位處于位時(shí)，將調(diào)零鍵“Z”按一下，輸出電流自動(dòng)調(diào)整到4mA。現(xiàn)場(chǎng)調(diào)滿------當(dāng)液位處于高位時(shí)，將調(diào)滿鍵“S”按一下，輸出電流自動(dòng)調(diào)整到20mA。調(diào)整好后，應(yīng)將變送器的端蓋擰緊。
Field zero adjustment ---- when the liquid level is at the position, press the zero adjustment key "Z" once, and the output current will be adjusted to 4mA automatically. Full on site: when the liquid level is at high level, press the full key "s" once, and the output current will be adjusted to 20mA automatically. After adjustment, tighten the end cover of the transmitter.
華恒變送器廠家憑借自身?yè)碛械膫鞲衅骱椭悄茈娐钒搴诵募夹g(shù)，可以根據(jù)客戶要求，低成本對(duì)核心技術(shù)進(jìn)行延伸變形，實(shí)現(xiàn)個(gè)性化產(chǎn)品定制。主要產(chǎn)品有SMART（斯瑪特）系列壓力變送器、多參數(shù)變送器、流量器、溫度傳感器和物位（液位變送器廠家，為我國(guó)電力、石油、化工、冶金、水泥、礦業(yè)等行業(yè)提供了高性能價(jià)格比的工業(yè)自動(dòng)變送器廠家產(chǎn)品.
With its own core technology of sensor and intelligent circuit board, Huaheng transmitter manufacturer can extend and transform the core technology at low cost according to customer requirements to achieve personalized product customization. The main products are smart (SMART) series pressure transmitter, multi parameter transmitter, flowmeter, temperature sensor and level (liquid level transmitter manufacturer, which provides high performance price ratio industrial automatic transmitter products for China's power, petroleum, chemical, metallurgical, cement, mining and other industries
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