3151型智能液位变送器现场校验的必要性/ 压力（差压）液位变送器是一连生产历程主动化中历程检测和控制体系的重要构成部门。其作用是将压力等被测工艺参数转换成相应的电（气）同一尺度信号，然后将此信号送至别的单位以实现对液位测量的过程中上述工艺参数的主动检测或主动调治。
The necessity of field calibration of 3151 intelligent liquid level transmitter / pressure (differential pressure) liquid level transmitter is an important part of the process detection and control system in the process of production process automation. Its function is to convert the measured process parameters such as pressure into the corresponding electrical (gas) signal of the same scale, and then send this signal to other units to realize the active detection or adjustment of the above process parameters in the process of liquid level measurement.
现场总线系统作为一种数字式通信网络，使过去采用点到点式的模拟量信号传输变为多点一线的串行数字式传输。因而，现场总线型智能压力/差压液位变送器大幅度减少了系统中的模拟信号， 从而几乎消除了回路的误差。并且全数字化双向通信在提高了系统的测量和控制精度的同时，也使系统组态和调试更加方便。智能压力/差压液位变送器功能模块的设定，数据的传输交换完全可以通过数字通讯工具或上位机交互实现。
As a kind of digital communication network, fieldbus system has changed the analog signal transmission from point-to-point to serial digital transmission. Therefore, the field bus type intelligent pressure / differential pressure liquid level transmitter greatly reduces the analog signal in the system, thus almost eliminating the loop error. And full digital two-way communication not only improves the measurement and control accuracy of the system, but also makes the system configuration and debugging more convenient. The setting of intelligent pressure / differential pressure liquid level transmitter function module and data transmission and exchange can be completely realized by digital communication tool or upper computer interaction.
3151型智能液位变送器现场校验的必要性/  应根据需要选择。
The necessity of field calibration of 3151 intelligent liquid level transmitter / it should be selected according to the needs.
压力/差压液位变送器需要装在设备下部，投入式液位计需要装在设备上部；
The pressure / differential pressure level transmitter shall be installed at the lower part of the equipment, and the input type level gauge shall be installed at the upper part of the equipment;
压力/差压液位变送器安装相对复杂，投入式液位计便于安装；
The installation of pressure / differential pressure level transmitter is relatively complex, and the input level meter is convenient for installation;
压力/差压液位变送器可以测量带压储罐液位，投入式液位计只能测常压（敞口）容器；\
The pressure / differential pressure liquid level transmitter can measure the liquid level of the tank with pressure, and the input liquid level meter can only measure the atmospheric (open) container\
容器内的情况复杂（如水流、搅拌）对压力/差压液位变送器的影响较小，投入式液位计要求容器内比较安静。
The complex situation in the vessel (such as water flow and agitation) has little influence on the pressure / differential pressure level transmitter. The input level gauge requires quietness in the vessel.
所以对回路中输出信号要由数字通讯工具，在应用现场可以由上位机来实现数据的监控和调整。同时由于不存在模拟信号的传输，所以对现场总线型智能压力/差压液位变送器的校验便变成了对单一过程变量量值的校准和溯源。亦即由标准过程变量标准源对现场总线型智能3151型智能液位变送器现场校验的必要性/压力/差压液位变送器施加标准过程变量，通过数字通讯工具或上位机监控现场总线型智能压力/差压液位变送器的数字输出（可以设定与标准过程变量标准源相同的计量单位），通过对单一的过程变量量程，线性的对比对现场总线型智能压力/差压液位变送器进行校准。
Therefore, the output signal in the loop should be monitored and adjusted by the digital communication tool and the upper computer in the application field. At the same time, because there is no analog signal transmission, the calibration of Fieldbus intelligent pressure / differential pressure level transmitter becomes the calibration and traceability of single process variable value. That is to say, standard process variable is applied to the necessity of field verification of Fieldbus intelligent 3151 level transmitter by standard process variable source / pressure / differential pressure level transmitter, and the digital output of Fieldbus intelligent pressure / differential pressure level transmitter is monitored by digital communication tool or upper computer (the same measurement unit as standard process variable source can be set), and The intelligent pressure / differential pressure level transmitter based on fieldbus is calibrated by single process variable range and linear comparison.
由于现场总线回路是完全的数字信号回路，所以对回路中输出信号要由数字通讯工具，在应用现场可以由上位机来实现数据的监控和同时由于不存在模拟信号的传输，所以对现场总线型智能压力/差压液位变送器的校验便变成了对单一过程变量量值的校准和溯源。亦即由标准过程变量标准源对现场总线型智能压力/差压液位变送器施加标准过程变量，通过数字通讯工具或上位机监控现场总线型智能压力/差压液位变送器的数字输出（可以设定与标准过程变量标准源相同的计量单位），通过对单一的过程变量量程，线性的对比对现场总线型智能压力/差压液位变送器进行校准。
Because the field bus loop is a complete digital signal loop, the output signal in the loop should be monitored by digital communication tools. In the application field, the upper computer can realize data monitoring and at the same time, because there is no analog signal transmission, the verification of the field bus intelligent pressure / differential pressure liquid level transmitter becomes the calibration and traceability of a single process variable value. That is to say, the standard process variable is applied to the field bus intelligent pressure / differential pressure level transmitter by the standard process variable source, and the digital output of the field bus intelligent pressure / differential pressure level transmitter is monitored by the digital communication tool or the upper computer (the same measurement unit as the standard process variable source can be set), and the linear comparison is made by the single process variable range Calibrate the fieldbus type intelligent pressure / differential pressure liquid level transmitter.
具体校验时分为现场总线网段接入和实验室单表校验。对于现场总线网段，数字通讯工具可以在总线网段的任何一个方便的位置连接，通常是在智能压力/差压液位变送器和现场总线接线盒中接入.
The specific calibration time is field bus network access and laboratory single meter calibration. For fieldbus network segment, digital communication tools can be connected at any convenient position of the bus network segment, usually in intelligent pressure / differential pressure level transmitter and Fieldbus junction box
3151高温投入式液位变送器特点：
3151 high temperature input liquid level transmitter features:
高精度测量，不受被测介质起泡、沉积、电气特性的影响宽范围的温度补偿
High precision measurement, not affected by the foaming, deposition and electrical characteristics of the measured medium, wide range of temperature compensation
固态结构，无可动部件，高可靠性，使用寿命长，从水、油到粘度较大的糊状都可以进行
Solid structure, no movable parts, high reliability, long service life, from water and oil to paste with high viscosity
稳定性好，精度高，可在高温环境下工作
Good stability, high precision, can work in high temperature environment
直接投入到被测介质中，安装使用相当方便
It is directly put into the tested medium, which is quite convenient for installation and use
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.

关键词推荐:

液位变送器

投入式静压变送器

工业现场管理