How to choose the digital display meter matched with the metal tube float flow meter

Abstract: The information on how to choose the digital display meter matched with the metal tube float flow meter is provided by the excellent flow meter and flow meter production and quotation manufacturers. Changzhou Liangbang Instrument Co., Ltd. is a well-known manufacturer of flowmeters in China. It is a professional enterprise integrating R&D, design, manufacturing, sales and engineering services. According to customer requirements, we can professionally customize glass rotor flow for customers. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the article details of how to choose the digital display meter matched with the metal tube float flowmeter. City Liangbang Instrument is a well-known manufacturer of flowmeters in China. It is a professional enterprise integrating R&D, design, manufacturing, sales and engineering services. According to customer requirements, we can professionally customize glass rotameter for customers. The latest generation of metal tube rotameter developed and produced by the introduction of foreign advanced calculation software has reached the international level of similar products, and the domestic production and sales of Liangbang brand flowmeters have reached the upstream level. Nowadays, the degree of automatic production in China is getting higher and higher, and many flow meters have 4-20mA signal output, such as metal tube float flowmeters, turbine flowmeters, electromagnetic flowmeters, etc., so supporting secondary instruments are needed, such as What problems should be paid attention to when choosing these secondary display meters for digital display meters or flow totalizers? Next, our company will tell you about 1. Instrument size. That is, the size of the instrument, which is a very basic problem. The digital display should be installed on the cabinet, so the overall coordination must be considered. If it is too large, it may not fit, and if it is too small, it is difficult to see the displayed numbers. In addition, the large-scale meter generally has strong function expansion, and the same function price It may be expensive, and the small size of the instrument may be less functionally expandable. At present, the international standard sizes of digital display panels mainly include the following: 48*24mm; 48*48mm; 48*96mm; 72*72mm; 96*96mm; 96*48mm; 160*80mm. 2. Display digits. This is directly related to the measurement accuracy of the digital display. Generally speaking, the higher the number of displayed digits, the more accurate the measurement and the more expensive the price. There are mainly the following types: two digits (99, special); three digits (999, extremely high) less); three and a half (1999, the mainstream of ordinary digital display); four (9999, the mainstream of intelligent digital display); four and a half (19999); four and three quarters (3999); five and More than five digits (common in counters, accumulators and high-end instruments), users can choose a digital display with several digits according to the measurement accuracy requirements. 3. Input signal. Refers to the measurement signal directly input to the meter. Some industrial signals are directly connected to the meter for measurement, and some signals are converted and then connected to the meter. It is necessary to clarify the nature of the measurement signal, otherwise the purchased meter cannot be used, or even damage the meter and original equipment. To find out the type of signal: current or voltage, AC or DC, pulse signal or linear signal, etc., but also to find out the size of the signal. The name of the instrument is not the same concept as the input signal. Here are a few examples: the input signal is an ammeter of 0-75mVdc (the name is ammeter, but the input signal is a voltage signal, because the current passes through a shunt to obtain a voltage signal); The signal is a tachometer of 0-10Vdc (the name is a tachometer, but the input signal is a voltmeter, because the inverter converts the speed signal into a voltage signal). 4. Working power supply. All digital display meters need working power supply. The working power supply of digital display meters mainly includes: 220Vac; 110/220Vac; 85-265VAC/DC switching power supply, 24Vdc (generally to be customized), 5Vdc (small panel meter). 5. Instrument function. The functions of the instrument are generally modular and optional, and the price of the instrument will vary according to the function. The digital display mainly has the following optional functions: alarm function and the number of groups of alarm output (ie relay action output) , the size and power of the power supply output and output voltage, the type of transmission output and transmission output (4-20mA or 0-10V, etc.), communication output and communication method and protocol (RS485 or RS232, Modbus or other protocols) ), for the adjustment and control instrument, there are more optional functions. Specifically, you need to refer to the manufacturer's selection spectrum to select a standard model, and communicate with the manufacturer and confirm that it is correct before placing an order. 6. Pay attention to several important parameters: measurement accuracy (the smaller the value, the more accurate), response speed (the smaller the value, the faster the response), working environment, temperature coefficient (the smaller the value, the less affected by the temperature), overload Ability 7. Special requirements. If the user has special requirements, they should put forward them, and let the manufacturer confirm whether they can meet the requirements. Don't take it for granted, such as: IP protection level, high-temperature working occasions, strong interference occasions, special signal occasions, special working methods, etc. In fact, the selection of digital display is not complicated. For simple digital display, you can usually buy it and use it.For users who use or choose digital display meters with complex functions for the first time, as long as they grasp the above points, they can also choose suitable products. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. . 'How to choose the digital display meter matched with the metal tube float flow meter'

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