The appearance of the instrument is a comprehensive product of a variety of science and technology, with a wide variety of varieties, wide application, and constantly updated, with a variety of classification methods. According to the intention and use of the use, there are mainly measuring instruments, automobile appearance, tractor appearance, marine appearance, aviation appearance, navigation instrument, driving instrument, radio testing instrument, carrier microwave testing instrument, geological exploration testing instrument, building materials testing instrument, seismic testing instrument, geodetic surveying and mapping instrument, hydrological instrument, timing instrument, agricultural testing instrument, commercial testing instrument, educational instrument, medical instrument, environmental protection instrument, etc.
1. Product appearance
The appearance of the instrument belonging to the mechanical industry products includes the appearance of industrial automation, the appearance of electrical instruments, optical instruments, analytical instruments, laboratory instruments and devices, data testing machines, climatic instruments, film machinery, photographic machinery, photocopying micromachinery, instrument appearance components, instrument appearance data, instrument appearance process equipment and other thirteen categories. They are versatile, large in batches, or necessary for the instrument appearance industry.
2. Feature classification
The appearance of various instruments can be divided into several sub-categories or sub-categories according to different characteristics, such as function, detection and control object, structure, principle, etc. For example, the appearance of industrial automation can be divided into detection appearance, loop display appearance, conditioning appearance and actuator according to function; In the meantime, the detection surface is divided into temperature measurement surface, pressure measurement surface, flow measurement surface, level measurement surface and mechanical measurement surface according to the measured physical quantity. According to the measurement method, the temperature measurement surface is divided into contact temperature measurement surface and non-contact temperature measurement surface; The appearance of contact temperature measurement can be divided into thermoelectric type, expansion type, resistance type, etc.
3. Other classifications
The classification of the appearance of other types of instruments is generally similar, mainly related to the development process, application habits and the classification of related products. There is no unified standard for the classification of instrument appearances, and there is a similar situation in the naming of instrument appearances.
In real work, we often divide the appearance of the instrument into two categories: the appearance of automation and the appearance of portable instruments, the appearance of automation refers to the appearance that needs to be fixed and installed on the site, also known as the appearance of the instrument installed on the site or the appearance of the instrument installed on the dial, this kind of appearance needs to be used with other equipment to complete one or several functions; The appearance of portable instruments refers to the appearance of portable instruments, sometimes called the appearance of testing instruments, which are generally divided into two types: desktop and handheld.
There is also a classification of the appearance of the instrument, called the primary appearance and the secondary appearance, the primary appearance refers to the part of the sensor that directly feels the measured signal, and the secondary appearance refers to the part that expands, displays and transmits the signal.
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1. Armature loop string resistance
The applied resistor is connected to the armature circuit.
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Check whether the keyed operating voltage is in the field of the additional value of the communication motor driver keying operating voltage, and detect whether there is a surge operating voltage formation
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1. Adjust the variable resistance directly from the surface of the Delta inverter
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Delta's active front-end inverter partner
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Precautions before installation of Delta inverters
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Use and maintenance of electric motors - Delta motors
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