Come here in 3 minutes to take you to understand the development history of temperature transmitters

【Hot attention of Chemical Machinery Equipment Network ] ChinaThe temperature transmitter equipment has been developed for more than 30 to 40 years and has certain research and innovation capabilities.
The continuous development and expansion of independent research and production capabilities, temperatureThe scale of the transmitter is growing.
However, there are not many companies specializing in the production of temperature transmitters, and some of them are small-scale self-employed individuals who do not have certain teaching staff.
Driven by reforms and innovations, some companies have continued to show their strength through their own improvement.

 

So, do you know the development history of temperature transmitters?
 

It is understood that the temperature transmitter uses thermocouples and thermal resistances as temperature measuring elements, and the output signal from the temperature measuring element is sent to the transmitter module, after voltage stabilization filtering, operational amplification, non-linear correction, V/I conversion, and constant current After circuit processing and reverse protection, it is converted into a 4-20mA current signal 0-5V/0-10V voltage signal linearly related to temperature, and RS485 digital signal output.
Generally used in industrial sites.

 

When the measuring range of the traditional temperature transmitter needs to be changed, it is usually adjusted by zero and full adjustment of two potentiometers, but these two potentiometers are the main culprit for the large temperature drift of the product.
With the advancement of science and technology, due to the cumbersome debugging of traditional analog temperature transmitters and poor comprehensive performance indicators, it can no longer meet the needs of on-site users, nor can it meet the requirements of factory spare parts, nor can it meet the requirements of sensor manufacturers.
demand.

 

Therefore, intelligent transmitters were born.
One of them is to use CUP in the product to digitize the signal.
When debugging, install * software on the PC, and use the data cable and modem to change the range of the temperature transmitter.
And the index number; the other is to embed the HART communication board in the smart product itself, and change the temperature range and index number of the temperature transmitter through the HART protocol hand-held device; the other two are the PA protocol and the FF protocol.
The principle of the temperature transmitter is similar to the HART protocol.
The application of HART, PA, FF communication protocol is more convenient for product programming (without limitation of location), but it will increase the price of the product itself and bring a burden to the owner.

 

　　Traditional temperature transmitters, PC programming temperature transmitters and HART programming temperature transmitters are the choices of most factories.
However, after using these methods for many years in the field, users often hear that the debugging is still too cumbersome.
It is impossible for every worker to be equipped with a PC.
Even if there is a PC, it may not be used because the debugging software of various manufacturers is not unified and cumbersome.
; Many factories are also not equipped with HART handheld communicator, it is often not very convenient when the transmitter needs to adjust the range.
So is there a product that can change this situation?
 

　　From the visit to the idea to the trial production, after nearly 30 months, the product finally passed the assessment of various indicators, especially the lightning protection and pulse train experiment is very good; it also meets the supporting needs of on-site users and sensor manufacturers; It is an intelligent product, and it is easy to operate.
It even only needs a screwdriver.
Changing the position of the dial can change its range, making a slight innovation in the temperature transmitter.

 

　　In addition, the integrated temperature transmitter is currently the most popular among temperature transmitters.
It is a module that integrates ordinary temperature transmitters and adds more intelligent integration technology, which is more intelligent.
Even in the high-power frequency conversion control system, it can be handled properly and maintain the advantage of efficient use.
Usually used with display instruments, recording instruments, electronic computers, etc.
, output 4-20ma, direct measurement of liquid, steam and gas medium and solid surface temperature in the range of 0℃-1800℃ in various production processes.
Its digital integrated application directly compensates for the shortcomings of traditional temperature transmitters and adapts to the magnetic interference of different degrees of harsh environments on the product itself.
The integrated temperature transmitter improves the efficiency of input and output, and increases the reliability.
It can be used with various instruments and meters.
It has a wide range of industrial fields: such as oil field, petrochemical, medical, manufacturing, electric power, metallurgy and other fields.
use.

 

　　Original title: Quick come | 3 minutes to take you to understand the development history of temperature transmitter