| 法蘭式液位變送器中_電流輸出型與電壓輸出型有哪些優(yōu)劣比較? |
| 信息來源： 液位變送器 | 2020-06-11 點擊量： 8525 |
3151 法蘭式液位變送器外觀上完全融合了目前國內(nèi)最為流行，并被廣泛使用的兩種變送器（羅斯蒙特3051系列變送器與橫河EJA—E系列變送器）的結(jié)構(gòu)優(yōu)點，讓眾多的使用者有耳目一新的感覺，同時與傳統(tǒng)的系列產(chǎn)品在安裝上可直接替換，有很強的通用性和替代能力。
3151 flange type liquid level transmitter integrates the structural advantages of two most popular and widely used transmitters (Rosemount 3051 series transmitter and Yokogawa eja-e series transmitter) in appearance, which makes many users feel fresh and refreshing. At the same time, it can be directly replaced with traditional series products in installation, with strong versatility and substitution ability.
法蘭式液位變送器中_電流輸出型與電壓輸出型有哪些優(yōu)劣比較?/要適用對象是測量高低溫，高真空，高粘度以及易結(jié)晶介質(zhì)的流量、液位、密度和壓力。并將其轉(zhuǎn)換成4~20mA DC的電流信號輸出，具有快速響應(yīng)、遠(yuǎn)程設(shè)定和自診斷等功能。EJA118W隔膜密封式差壓變送器,EJA118N隔膜密封式差壓變送器和EJA118Y隔膜密封式差壓變送器,升級換代型號便是EJA118E隔膜密封式智能差壓變送器
In flange type liquid level transmitter_ What are the advantages and disadvantages of current output type and voltage output type? / it is suitable for measuring the flow, liquid level, density and pressure of high and low temperature, high vacuum, high viscosity and easily crystallized medium. It can be converted into 4 ~ 20mA DC current signal output, which has the functions of fast response, remote setting and self diagnosis. Eja118w diaphragm seal differential pressure transmitter, eja118n diaphragm seal differential pressure transmitter and eja118y diaphragm seal differential pressure transmitter. The upgraded model is eja118e diaphragm seal intelligent differential pressure transmitter
法蘭式液位變送器中_電流輸出型與電壓輸出型有哪些優(yōu)劣比較?/在單片機控制的許多應(yīng)用場合,都要使用變送器來將單片機不能直接測量的信號轉(zhuǎn)換成單片機可以處理的電仿真信號，如電流變送器,壓力變送器、溫度變送器、流量變送器等。
In flange type liquid level transmitter_ What are the advantages and disadvantages of current output type and voltage output type? / in many applications controlled by single-chip microcomputer, transmitters are used to convert the signals that can not be directly measured by single-chip microcomputer into electrical simulation signals that can be processed by single-chip microcomputer, such as current transmitters, pressure transmitters, temperature transmitters, flow transmitters, etc.
早期的變送器大多為電壓輸出型，即將測量信號轉(zhuǎn)換為0-5V電壓輸出，這是運放直接輸出,信號功率<0.05W,通過仿真/數(shù)字轉(zhuǎn)換電路轉(zhuǎn)換數(shù)字信號供單片機讀取、控制。但在信號需要遠(yuǎn)距離傳輸或使用環(huán)境中電網(wǎng)干擾較大的場合，電壓輸出型傳感器的使用受到了極大限制，暴露了抗干擾能力較差,線路損耗破壞了精度等等等缺點，而兩線制電流輸出型變送器以其具有極高的抗干擾能力得到了廣泛應(yīng)用。
Most of the early transmitters are voltage output type, that is, the measurement signal is converted to 0-5V voltage output, which is the direct output of the op amp, the signal power is less than 0.05W, and the digital signal is converted through the simulation / digital conversion circuit for the MCU to read and control. However, when the signal needs long-distance transmission or the power grid interference is large in the use environment, the use of voltage output type sensor is greatly limited, which exposes the shortcomings of poor anti-interference ability, line loss and accuracy, etc., while the two-wire current output type transmitter has been widely used for its high anti-interference ability.
法蘭式液位變送器中_電流輸出型與電壓輸出型有哪些優(yōu)劣比較?/電壓輸出型變送器抗干擾能力極差，線路損耗的破壞,談不上精度有多高,有時輸出的直流電壓上還迭加有交流成分，使單片機產(chǎn)生誤判斷，控制出現(xiàn)錯誤，嚴(yán)重時還會損壞設(shè)備，輸出0－5Ｖ絕對不能遠(yuǎn)傳，遠(yuǎn)傳后線路壓降大，精確度大打折扣?，F(xiàn)在很多的ADC,PLC,DCS的輸入信號端口都作成兩線制電流輸出型變送器4-20mA的,證明了電壓輸出型變送器被淘汰的必然趨勢。
In flange type liquid level transmitter_ What are the advantages and disadvantages of the current output type and the voltage output type? / the anti-interference ability of the voltage output type transmitter is very poor, and the line loss is damaged, which can not be said to have high precision, Sometimes the output DC voltage is also superposed with AC component, which causes the single chip computer to make a wrong judgment and control, and even damages the equipment when it is serious. The output 0-5V can never be transmitted far. After the remote transmission, the line voltage drop is large and the accuracy is greatly reduced. Now many input signal ports of ADC, PLC and DCS are made into two-wire current output transmitter 4-20mA, which proves the inevitable trend of voltage output transmitter being eliminated.
法蘭式液位變送器中_電流輸出型與電壓輸出型有哪些優(yōu)劣比較?/什么是兩線制電流變送器的6大全面保護(hù)功能：
In flange type liquid level transmitter_ What are the advantages and disadvantages of current output type and voltage output type? / what are the six comprehensive protection functions of two-wire current transmitter
(1)、輸入過載保護(hù)；
(1) . input overload protection;
(2)、輸出過流限制保護(hù)；
(2) . output overcurrent limit protection;
(3)、輸出電流長時間短路保護(hù)；
(3) . long time short circuit protection of output current;
(4)、兩線制端口瞬態(tài)感應(yīng)雷與浪涌電流TVS抑制保護(hù)；
(4) , two wire port transient induced lightning and surge current TVs suppression protection;
(5)、工作電源過壓極限保護(hù)≤35V；
(5) Over voltage limit protection of working power supply ≤ 35V;
(6)、工作電源反接保護(hù)。
(6) . reverse connection protection of working power supply.
華恒儀表制造廠家憑借專業(yè)技術(shù)優(yōu)勢，可靠穩(wěn)定的產(chǎn)品質(zhì)量，堅持大限度的滿足用戶的需求是企業(yè)發(fā)展的動力源泉，以優(yōu)質(zhì)專業(yè)的服務(wù)為我國電力、石油、化工、冶金、水泥、礦業(yè)、市政、造紙等行業(yè)提供了高性能價格比的工業(yè)自動化儀表產(chǎn)品。為我國自動化儀表的發(fā)展做出了重要貢獻(xiàn)。
Relying on the advantages of professional technology, reliable and stable product quality, Huaheng instrument manufacturer insists on meeting the needs of users to a large extent, which is the power source of enterprise development. With high-quality professional services, it provides industrial automation instrument products with high performance price ratio for China's electric power, petroleum, chemical industry, metallurgy, cement, mining, municipal administration, papermaking and other industries. It has made an important contribution to the development of automatic instruments in China.
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