Thermocouple temperature instrument which problems need to pay attention to the choose and buy

The temperature of the thermocouple is a common instrument in many of the industry has a certain application. Users at the time of purchase of thermocouple temperature instrument is must pay attention to four aspects, because the stand or fall of thermocouple choose contact thermocouple measurement is important, so the choice of the thermocouple in the users is very important.

the following project will introduce thermocouple temperature instrument of choose and buy must pay attention to four aspects.

1, the index number:

the first thing you should consider when buying thermocouple to measure how much is the temperature range. Different degree, number of measured temperature is also limited. If you measure temperature at 500 ℃ can choose k type index number, E index can also.

2, response time:

if you need a faster thermal response time. Can choose according to the working end of the shell mold, is characterized by fast response speed, service life is long, but this does not apply to places that have requirements of electromagnetic interference temperature measurement. If you need to electromagnetic interference resistance and long service life, your choice of the type of insulation.

3, installation method:

thermocouple temperature instrument installation on site is very important, when you choose to use a thermocouple, must know your job site have any existing device, if must provide, can according to your device on the thermocouple welding corresponding device at the scene.

outside the thermocouple protection tube material: thermocouple protection tube outside a lot of materials to choose from, depending on what we need in the environment and the medium temperature measurement. Many enterprises due to various reasons will put the thermocouple directly in the material and temperature ( This is normal) , and the corrosive materials is not very strong, so in this case, you have to explain.

now we all know the thermocouple must pay attention to the aspects of the choose and buy, degree good, response time, installation method, thermocouple protection tube material, these points are user thermocouple must pay attention to the choose and buy, after the user at the time of purchase thermocouple can refer to the above content to make their purchases.

4, what are the connection mode of thermocouple temperature sensor

thermocouple temperature sensor is a kind of common measuring instrument, the application of industry is also very much. Thermocouple temperature sensor is a kind of temperature variables into a transmission temperature meter, it is mainly used for industrial process measurement and control of the temperature parameters. But the connection mode of thermocouple temperature sensor are different, so what are the connection mode of thermocouple temperature sensor, let below small make up on detailed introduction.

temperature thermocouple sensors according to the power supply connection mode can be divided into two wire system and four wire system, two kinds of connection mode. In use process, thermocouple temperature sensor according to different standards, the connection mode of thermocouple temperature sensor is different.

have electric thermocouple sensor unit and miniaturization modular combination instrument series, multi-functional intelligent. The former are not to bring a thermocouple sensor, after two types of thermocouple sensor can easily with the thermocouple or heat resistance of thermocouple sensor with a thermocouple sensor.

usually consists of two parts: the thermocouple sensor and signal converters. Thermocouple sensor is mainly the thermocouple or heat resistance; Signal converter mainly consists of measurement unit, signal processing and conversion unit ( Due to industrial heat resistance and thermocouple indexing table is standardized, so signal converter as a separate product is called the thermocouple sensor) , some thermocouple sensor to increase the display unit, some also have the function of field bus.

if the thermocouple sensor consists of two used to measure the temperature of thermocouple sensor, the output signal and the temperature difference between a given continuous function relationship. So called thermocouple temperature sensor. Thermocouple sensor output signal and a given continuous function relation between temperature ( Usually in the form of linear function) , the early production of thermocouple sensor output signal and the temperature thermocouple sensor resistance ( Or voltage value) A linear function relationship between. The output signal of standardization is 0 ma ~ 10 ma ma and 4 ~ 20 ma ( Or 1 v to 5 v) The dc signal. Do not rule out other standardized output signal with special provisions.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure thermocouple sensor, digital temperature thermocouple sensor