Pressure Transmitter: I don’t want to spend time selecting models, it will consume a lot of energy after sales

The old saying in the introduction of this issue is good. Caution can catch thousands of cicadas and sail for thousands of years (I believe that 99.9% of my friends don’t know the first half sentence). As an erudite and knowledgeable driver who has been in the instrument industry for many years, Xiaobian today Let me tell you about the importance of pressure transmitter selection in the automation industry. The selection of the instrument will not only save effort and worry, but also save money! 　　 Similarly, if you don’t want to spend time on the selection, you don’t check carefully. Parameters, just buy one and use it. Not only is it impossible to spend money to do things, but a series of after-sales problems are more likely to occur in the later period, which is really laborious! .　　 In order to better help everyone understand, let's take a pressure transmitter as an example: pressure value is one of the most common monitoring indicators in industrial sites. Different industrial scenes have a variety of pressure transmitters to choose from. Type selection note 1　　 According to the site conditions, the instrument should be selected according to local conditions. In the harsh outdoor environment, because the sun and rain are unavoidable, the conventional pressure transmitter can barely be used, but after a long time, the internal circuit components Very likely to be damp and cause a short circuit. Therefore, in this case, we generally recommend a pressure transmitter with a 2088 housing. The design of the double-chamber housing can effectively isolate the entry of external dust and water vapor, and greatly improve the product life. Of course, if it is in a highly corrosive situation, great care must be taken in consideration of the anti-corrosion performance of the instrument. Selection points 2　　 clear the temperature range used by the product. Sensors in industrial sites will have a range of temperature requirements. Too high or too low will affect the external material, internal circuit board performance, etc., so for ordinary pressure transmitters , When the temperature is higher than 80℃, it is necessary to try to reduce the outside temperature or to reduce the temperature by installing a heat sink. Therefore, when you select the product, you must pay special attention to the temperature of the medium on the spot. If the temperature is not confirmed clearly, the product may be useless if you buy it back.　　Type selection attention 3　　Measure the properties of the medium or the functional requirements to be realized by the product　　This point is also the top priority of the product selection. When you select a product, you must first clarify the function it wants to achieve, whether it is to measure temperature, flow, liquid level, pressure or PH value, etc. Some different industrial instruments may have the same principle, such as pressure transmitters and Input type level gauge, but in actual application, the installation and use methods of the two are completely different, so clarifying the functions you want to achieve with industrial products is an important step in the selection. In addition, the properties of the measuring medium, including whether it is corrosive, toxic, flammable and explosive, whether there are large impurity particles, temperature, etc., will affect the selection of the product. One thing to emphasize here is that you should be especially careful when it comes to flammable and explosive! Be careful! Be careful! Choose different explosion-proof grades according to the site conditions, not as long as it is explosion-proof. The site conditions are different, and the explosion-proof grade requirements are also Different. If you don’t pay attention to this, as soon as an explosion occurs, the people will be gone, and the after-sales service will be useless.　　 Type selection attention points 4　　 Whether there is interference on site　　 The long-term normal use of the sensor requires not only its high-quality and qualified performance, but also the interference situation on the site. The most typical example here is the installation of electromagnetic flowmeters. When the flowmeter is installed on site, there will always be high-power equipment such as water pumps and frequency converters. If the installation location of the flowmeter is too close, the value displayed on the flowmeter will be It will jump randomly and the accuracy of the measurement will be greatly compromised. Therefore, when selecting a model, be sure to pay attention to the on-site interference. If the interference is not handled properly, the effect will be the same even with the most expensive imported products.　　I have talked so much. Regarding the product selection, I can sum it up as the following 30-word formula: 　　Choose the product, don’t be anxious. The parameters are all, the most important; it depends on the working conditions, the grounding gas; the function is divided, the category is selected; the technology is more practical.　　 Of course, to choose a good product, we must start from ourselves. We must learn to understand the principle and general use of the product. After all, in this society, only knowledge is the core competitiveness!
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