Influence pressure, differential pressure transmitter factor static pressure error correction
Product description: Differential pressure transmitter is an industrial product. In actual procurement, it is mostly used in various industries in the form of suitable supporting forms. Therefore, in order to meet the needs of different industries, different standards, and different customers, the pressure difference The price of pressure transmitters is also different. What are the specific factors that affect the price of differential pressure transmitters?
1. Brand factor: The brand includes not only products, but also supporting services, culture, etc. In terms of brand, in the situation of differential pressure transmitters that are booming in the domestic manufacturing industry, there is no need to pursue foreign brands. After all, for most enterprises In terms of cost performance and convenience of after-sales service, especially after-sales maintenance, this is very important. As an industrial automation control instrument equipment, good service support can save a lot of maintenance costs.
2. Different specifications, the price of the differential pressure transmitter will be different. It is easier to understand that the material used for the pressure transmitter is different, which will affect the price. For example, whether the product has a liquid level transmitter passed SIL level certification, which level is it, whether there is explosion-proof certification, whether it is explosion-proof or explosion-proof, waterproof level, etc.
3. There are many types and classifications of differential pressure transmitters. According to different sensors, they can be divided into diffused silicon sensors, capacitive sensors, and single-crystal silicon sensors. According to different output current methods, they can be divided into two-wire systems. , three-wire system, four-wire system, most of which are two-wire system.
In the actual use of the differential pressure transmitter, the temperature transmitter may have a certain error in its measurement accuracy due to the influence of installation and working conditions. The static pressure error mentioned here is very common. How to correct it? ?
1. For the three-valve group of the transmitter, one of the high and low pressure valves should be opened and the other closed, and the balance valve should be open.
2. The same static pressure is injected into the positive and negative pressure chambers of the differential pressure transmitter at the same time.
3. Under the premise of not sure whether the positive and negative pressure chambers are full of the measured medium, it can be solved by exhausting or exhausting gas.
