A brief introduction to the structure and principle of 3151 differential pressure liquid level transmitter
西安华恒仪表制造厂家在立足西北自动化工业控制生产的中,以自身核心,电路板设计和制造技术,电容式压力传感器设计生产技术.可以根据客户要求，低成本对核心技术进行延伸变形，实现个性化产品定制。主要产品有SMART（斯玛特）系列压力变送器、多参数变送器、流量器、温度传感器和物位（液位变送器厂家，为我国电力、石油、化工、冶金、水泥、矿业等行业提供了高性能价格比的工业自动变送器厂家产品./液位变送器生产|3151差压液位变送器结构原理简介
Based on the northwest automation industrial control production, Xi'an Huaheng instrument manufacturer, with its own core, circuit board design and manufacturing technology, capacitive pressure sensor design and production technology, can extend and deform the core technology according to the customer's requirements at low cost, and realize 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 manufacturer products for China's power, petroleum, chemical, metallurgical, cement, mining and other industries
差压液位变送器用于可以通过hart475手操器或HART 275手操器相互通讯，通过它们进行设定和监控等。差压液位变送器用于防止管道中的介质直接进入变送器里，感压膜片与变送器之间靠注满流体的毛细管连接起来。它用于测量液体、气体或蒸汽的液位、流量和压力，然后将其转变成4～20mA DC信号输出。3151差压液位变送器的结构原理及工作性能
The differential pressure liquid level transmitter is used to communicate with each other through Hart 475 or Hart 275, and to set and monitor through them. The differential pressure liquid level transmitter is used to prevent the medium in the pipeline from entering the transmitter directly. The pressure sensing diaphragm and the transmitter are connected by a capillary filled with fluid. It is used to measure the liquid level, flow and pressure of liquid, gas or steam, and then convert it into 4-20mA DC signal output. Structure principle and performance of 3151 differential pressure liquid level transmitter
1）3151差压液位变送器的结构原理。E－JA110A差压液位变送器由单晶硅谐振式传感器上的两个H形振动梁分别将差压、压力信号转换为频率信号送到脉冲计数器，再将两频率之差直接传递到微处理器进行数据处理，经D/A转换器转换为与输入信号相对应的4～20mA输出信号，并在模拟信号上叠加一个BRAIN/HART数字信号进行通信[1]。膜盒组件中内置的特性修正存储器主要存储传感器的环境温度、静压及输入/输出特性等修正数据，经微处理器运算，可使变送器获得优良的温度特性、静压特性和输出特性。/液位变送器生产|3151差压液位变送器结构原理简介
1) The structure and principle of 3151 differential pressure liquid level transmitter. E-ja110a differential pressure liquid level transmitter transforms the differential pressure and pressure signals into frequency signals by two H-shaped vibration beams on the single crystal silicon resonant sensor and sends them to the pulse counter, and then directly transmits the difference between the two frequencies to the microprocessor for data processing. After the D / a converter, it is converted into 4-20mA output signal corresponding to the input signal, and a brain / Hart is superposed on the analog signal Digital signal for communication [1]. The built-in characteristic correction memory in the capsule module mainly stores the correction data such as the ambient temperature, static pressure and input / output characteristics of the sensor. Through microprocessor operation, the transmitter can obtain excellent temperature, static pressure and output characteristics.
通过I-O口与外部设备（如手持智能终端BT200或275以及DCS中的带通信功能的I/O卡）以数字通信方式传递数据，即高频2.4kHz（BRAIN协议）或1.2kHz（HART协议）数字信号叠加在4～20mA信号线上。在进行通信时，频率信号对4～20mA的信号不产生任何扰动影响，变频器工作原理见图1。
Through I-O port and external equipment (such as BT200 or 275 handheld intelligent terminal and I / O card with communication function in DCS), data is transmitted in digital communication mode, i.e. high frequency 2.4khz (brain protocol) or 1.2kHz (HART Protocol) digital signals are superimposed on 4-20mA signal line. During the communication, the frequency signal does not produce any disturbance to the 4-20mA signal, and the working principle of the frequency converter is shown in Figure 1.
2）3151差压液位变送器的工作性能主要有：单晶硅谐振式传感器；过程连接与其他产品兼容，实现*佳测量；超低功耗，单只静态时0.096W，满量程功耗为0.48W，输出电流内部限制功耗为0.6W；高稳定性和高可靠性；完善的自诊断及远程设定通信功能；外部零点/量程调校。
2) The performance of 3151 differential pressure liquid level transmitter mainly includes: single crystal silicon resonant sensor; process connection is compatible with other products to achieve * good measurement; ultra-low power consumption, single static 0.096w, full range power consumption 0.48w, output current internal limit power consumption 0.6W; high stability and reliability; perfect self diagnosis and remote setting communication function; external zero / range adjustment 。
3151差压液位变送器自诊断故障处理
Self diagnosis troubleshooting of 3151 differential pressure liquid level transmitter
采用微型计算机技术的3151差压液位变送器具有十分完整的自诊断功能。如自诊断时发现错误，仪表头的内藏指示计将显示错误代码，然后根据所显示的错误代码，查明故障情况。如测量值出现异常，应先确定是被测流体变化异常还是测量系统出错。如确认是测量系统出错，需分别从运行状况、安装环境和变送器自身等方面着手检查，采取相应措施解决。
3151 differential pressure liquid level transmitter with microcomputer technology has very complete self diagnosis function. If an error is found during self diagnosis, the embedded indicator in the instrument head will display the error code, and then find out the fault condition according to the displayed error code. If the measured value is abnormal, it is necessary to determine whether the measured fluid is abnormal or the measurement system is wrong. If it is confirmed that the measurement system is in error, it is necessary to check the operation condition, installation environment and transmitter itself, and take corresponding measures to solve the problem.
1）当3151差压液位变送器输出显示超出规定参数值时，先看仪表头内藏指示计有无错误代码显示。若无错误代码显示，且电源接线也正确，可检查平衡阀是否完全关闭和高/低压阀是否完全开启，以及测压部分导压管等处有无泄露和高/低压测压管连接是否正确。若以上内容均无问题，*后进行调零，故障即可解决[2-3]。/液位变送器生产|3151差压液位变送器结构原理简介
1) When the output display of 3151 differential pressure liquid level transmitter exceeds the specified parameter value, first check whether there is error code display on the indicator hidden in the instrument head. If there is no error code display and the power wiring is correct, check whether the balance valve is fully closed and the high / low pressure valve is fully open, and whether there is leakage at the pressure measuring part of the impulse pipe and whether the high / low pressure pipe is connected correctly. If there is no problem with the above content, * and then zero, the fault can be solved [2-3].
2）当3151差压液位变送器无输出信号或输出值与实际流量不相符或被测流量变化而输出信号无相应变化时，先看仪表头内藏指示计有无错误代码显示，若无自诊断错误代码提示，且电源接线也正确，则需进一步检查电源电压是否正常及负载电阻连接是否正确，检查测压部分的导压管有无压力泄露。若仍查找不出原因，则应仔细检查变送器回路连线，判断是否因断线或布线错误引起的故障[4]。仪表的故障处理一般遵循由简单到复杂的原则，3151差压液位变送器因其优良的性能，在实际使用中所出现的各类故障通常都与被测流体、运行环境等外部因素有关。譬如出现零位经常变动或指示值不准时，很可能是因变送器测压部分滞留气泡或夹带有不纯的被测流体等杂质，这时松开排液/气螺钉，排空滞留气体或杂质，故障即可解决。/液位变送器生产|3151差压液位变送器结构原理简介
2) When there is no output signal of 3151 differential pressure level transmitter or the output value does not match the actual flow or the output signal does not change due to the change of measured flow, first check whether there is error code display on the indicator hidden in the instrument head. If there is no self diagnosis error code prompt and the power supply wiring is correct, further check whether the power supply voltage is normal and the load resistance connection is correct. Check Whether there is pressure leakage in the impulse pipe of the pressure measuring part. If the cause still cannot be found, carefully check the transmitter circuit wiring to determine whether the fault is caused by disconnection or wiring error [4]. The fault treatment of the instrument generally follows the principle from simple to complex. Because of its excellent performance, all kinds of faults in actual use are usually related to external factors such as the measured fluid, operation environment, etc. For example, if the zero position often changes or the indication value is not on time, it is likely that the air bubble is trapped in the pressure measuring part of the transmitter or impurities such as impure measured fluid are entrained. At this time, loosen the drain / gas screw, empty the trapped gas or impurities, and the fault can be solved.
华恒变送器厂家研发出传感器和智能电路板两项核心技术，不仅所有产品的核心部件技术全部掌握，工业自动变送器厂家的精确度也在不断提高，由0.2级提高到0.1级。还可通过对所掌握核心技术进行延伸，变形出测流量、测温度的其他产品。
Huaheng transmitter manufacturers have developed two core technologies, sensor and intelligent circuit board. Not only do they master all the core component technologies of all products, but also the accuracy of industrial automatic transmitter manufacturers is constantly improving, from level 0.2 to level 0.1. Through the extension of the core technology, other products for measuring flow and temperature can be deformed.

关键词推荐:

液位变送器选型   液位变送器生产原理   3151液位变送器选型