3151 法兰式液位变送器外观上完全融合了目前国内最为流行，并被广泛使用的两种变送器（罗斯蒙特3051系列变送器与横河EJA—E系列变送器）的结构优点，让众多的使用者有耳目一新的感觉，同时与传统的系列产品在安装上可直接替换，有很强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.
法兰式液位变送器中_电流输出型与电压输出型有哪些优劣比较?/要适用对象是测量高低温，高真空，高粘度以及易结晶介质的流量、液位、密度和压力。并将其转换成4~20mA DC的电流信号输出，具有快速响应、远程设定和自诊断等功能。EJA118W隔膜密封式差压变送器,EJA118N隔膜密封式差压变送器和EJA118Y隔膜密封式差压变送器,升级换代型号便是EJA118E隔膜密封式智能差压变送器
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
法兰式液位变送器中_电流输出型与电压输出型有哪些优劣比较?/在单片机控制的许多应用场合,都要使用变送器来将单片机不能直接测量的信号转换成单片机可以处理的电仿真信号，如电流变送器,压力变送器、温度变送器、流量变送器等。
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.
早期的变送器大多为电压输出型，即将测量信号转换为0-5V电压输出，这是运放直接输出,信号功率<0.05W,通过仿真/数字转换电路转换数字信号供单片机读取、控制。但在信号需要远距离传输或使用环境中电网干扰较大的场合，电压输出型传感器的使用受到了极大限制，暴露了抗干扰能力较差,线路损耗破坏了精度等等等缺点，而两线制电流输出型变送器以其具有极高的抗干扰能力得到了广泛应用。
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.
法兰式液位变送器中_电流输出型与电压输出型有哪些优劣比较?/电压输出型变送器抗干扰能力极差，线路损耗的破坏,谈不上精度有多高,有时输出的直流电压上还迭加有交流成分，使单片机产生误判断，控制出现错误，严重时还会损坏设备，输出0－5Ｖ绝对不能远传，远传后线路压降大，精确度大打折扣。现在很多的ADC,PLC,DCS的输入信号端口都作成两线制电流输出型变送器4-20mA的,证明了电压输出型变送器被淘汰的必然趋势。
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.
法兰式液位变送器中_电流输出型与电压输出型有哪些优劣比较?/什么是两线制电流变送器的6大全面保护功能：
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)、输入过载保护；
(1) . input overload protection;
(2)、输出过流限制保护；
(2) . output overcurrent limit protection;
(3)、输出电流长时间短路保护；
(3) . long time short circuit protection of output current;
(4)、两线制端口瞬态感应雷与浪涌电流TVS抑制保护；
(4) , two wire port transient induced lightning and surge current TVs suppression protection;
(5)、工作电源过压极限保护≤35V；
(5) Over voltage limit protection of working power supply ≤ 35V;
(6)、工作电源反接保护。
(6) . reverse connection protection of working power supply.
华恒仪表制造厂家凭借专业技术优势，可靠稳定的产品质量，坚持大限度的满足用户的需求是企业发展的动力源泉，以优质专业的服务为我国电力、石油、化工、冶金、水泥、矿业、市政、造纸等行业提供了高性能价格比的工业自动化仪表产品。为我国自动化仪表的发展做出了重要贡献。
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.