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智能差压变送器的安装方法【地点选择和安装方式】最新

作者: 来源: 日期:2018-9-21 11:22:22 人气:105

智能差压变送器是在普通压力或差压钱汇娱乐的基础上增加微处理器电路而形成的智能检测仪表,压力或差压变送器的精度为0.1 级,量程范围为 100:1 或 50:1,时间常数在 0 ~ 36s 可调,仪表的电压范围为 15 ~ 36VDC,正常工作电压为 24VDC,两线制仪表,输出电流 4 ~ 20mA,一般使用 HART 通讯协议。     

智能差压变送器的主要特点    

可通过软件对钱汇娱乐的非线性、温漂、时漂等进行自动补偿。可自诊断,通电后可对钱汇娱乐进行自检,以检查钱汇娱乐各部分是否正常,并作出判断。数据处理方便准确,可根据内部程序自动处理数据,如进行统计处理、去除异常数值等。   

智能差压变送器的安装方法及地点选择      

智能差压变送器的安装有多种方式,目前经常用到的有以下三种。         

A、直接管道安装方式,这种安装方式简单,用材少。         

B、法兰安装,主要应用于液位测量,利用液体的静压力对液位进行测量。        

C、支架安装(管装平支架),大多采用此种安装方式,安装维护方便,以往在露天的位置使用仪表箱作为保护智能差压变送器免遭粉尘、雨淋,但现在的智能差压变送器的防护做的很好,防护等级在 IP65,工作的环境温度-40~+75℃,耐震动、防尘、防雨,5年免维护。

智能差压变送器的接线         

目前,智能差压变送器更多的用于 DCS 控制系统中,在现场安装的智能差压变送器均带有 4 ~ 20mA 输出和数字通讯功能,通过屏蔽电缆连接到现场电力室模件柜 AI 模件的输入端。         

手操器使用非常方便,可以在现场电力室内的 DCS 模件柜相应的端子上使用。通过手操器,可以检查和设置智能差压变送器的零点、量程、变送器工作点的温度、工程压力单位的选择,如 Pa、Bar 等工作情况,例如某一压力点的零点或量程需要改变,在电力室就可以通过使用手操器轻松改变。

Intelligent differential pressure transducer is an intelligent measuring instrument which is formed by adding microprocessor circuit on the basis of ordinary pressure or differential pressure transducer. The precision of pressure or differential pressure transducer is 0.1, the measuring range is 100:1 or 50:1, the time constant is adjustable from 0 to 36s, the voltage range of the instrument is 15-36VDC, and the normal working electricity. Pressure is 24VDC, two wire instrument, output current 4 to 20mA, generally use HART communication protocol.

Main features of intelligent differential pressure transmitter

The nonlinearity, temperature drift and time drift of sensors can be compensated automatically by software. It can be self-diagnostic. After power-on, the sensor can be self-checked to check whether the various parts of the sensor are normal and make a judgment. Data processing is convenient and accurate, and data can be automatically processed according to internal procedures, such as statistical processing, removal of abnormal values, etc.

Installation and location selection of intelligent differential pressure transmitter

There are many ways to install the intelligent differential pressure transmitter. There are three kinds of frequently used ones.

A, direct pipe installation, this installation is simple and less material.

B, flange installation, mainly used in liquid level measurement, using the static pressure of liquid to measure liquid level.

C. Bracket installation (pipe-mounted flat bracket), mostly using this installation method, easy installation and maintenance, in the past in the open-air position as a protection of intelligent differential pressure transmitter from dust, rain, but now the intelligent differential pressure transmitter protection done very well, protection level in IP65, working environment temperature - 40 ~ 40 It is resistant to vibration, dustproof and rain proof for 5 years.

Wiring of intelligent differential pressure transmitter

At present, the intelligent differential pressure transmitter is more used in the DCS control system. The intelligent differential pressure transmitter installed in the field has the function of 4-20 mA output and digital communication. It is connected to the input of AI module of the module cabinet of the field power room through shielded cable.

Manipulator is very convenient to use, can be used in the field power room DCS module cabinet terminal. Through the manual manipulator, can check and set the intelligent differential pressure transmitter zero, range, transmitter operating point temperature, engineering pressure unit selection, such as Pa, Bar and other working conditions, such as a pressure point zero or range needs to be changed, in the power room can be easily changed by using the manual manipulator.

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