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technical article
Knowledge about temperature transmitters
2011-8-24 10:55:29

是信号 仪表 转换, 可以与测量元件配合使用, 不仅能 把温度或 温差信号转换成统一信号输出 ,而且 还可以把其 它的 能够转换成直流毫伏信号的参数也变成相应的统一标准信号输出, 所以可以 实现对温度参数的显示 记录 自动控制。 The temperature transmitter is a conversion of signal instruments . It can be used in conjunction with measuring elements. Not only can it convert temperature or temperature difference signals into a unified signal output , but it can also change other parameters that can be converted into DC millivolt signals. The corresponding unified standard signal output, so that temperature parameters can be displayed , recorded and automatically controlled.

可分为两线制和四线制 连接方式。 Temperature transmitters can be divided into two-wire and four-wire connections. 属于 四线制温度变送器 的一种 它是 控制室内架装仪表, 共有 三类品种: 1 直流毫伏变送器 2 热电阻温度变送器 3 热电偶温度变送器。 DDZ-Ⅲ temperature transmitter is a type of four-wire temperature transmitter . It is used to control indoor rack-mounted instruments. There are three types: Transmitter ( 3 ) thermocouple temperature transmitter.
有以下特点 The four-wire temperature transmitter has the following characteristics :
温度变送器 采用 的是 低漂移、高增益的集成运算放大器, 这样可以使得 仪表的可靠性和稳定性有所提高。 ( 1 ) The temperature transmitter uses an integrated operational amplifier with low drift and high gain, which can improve the reliability and stability of the instrument.
这样可以 使 变送器的输出信号和被测温度之间 成为 线性 关系, 从而 提高了变送器精度, 而且还能 方便指示和记录。 ( 2 ) A linearization circuit is set in the thermocouple temperature transmitter and the thermal resistance temperature transmitter , so that the output signal of the transmitter and the measured temperature become a linear relationship, thereby improving the transmission Device accuracy, but also easy to indicate and record.
温度变送器的 线路中采用了安全火花防爆型措施,增加了直流 与交流之间 转换器 部分, 而且还 有安全栅的功能, 因此 测量来自危险场所的直流信号与温度信号。 ( 3 ) The circuit of the temperature transmitter adopts a safety spark explosion-proof measure, which increases the converter part between DC and AC , and also has the function of a safety barrier, so it can measure the DC signal and temperature from a hazardous location signal.