Analysis on the application scope of weighing instrument

Weighing instrument, also called weighing display control instrument, is an electronic device that converts the signal of weighing sensor (or through component transmitter) into component digital display, and can store, count and print component data. It is often used for automatic batching and weighing in industrial and agricultural production to improve production efficiency.

The functional objectives of weighing instruments used in industrial enterprises are usually characterized by accuracy (also known as precision), variation and acuity. Instrument workers usually calibrate instruments by adjusting accuracy, variation and sensitivity.

Variation refers to the maximum difference between the indicated values of the weighing instrument when the measured variables (which can be understood as input signals) tend to reach the same value for many times, which is about the degree to which the measured parameters change from small to large (positive characteristics) and the measured parameters change from large to small (reverse characteristics) in a stable external environment, and the difference between them is called instrument variation. Reliability weighing control instrument reliability is another serious functional goal sought by instrument workers in chemical enterprises. Reliability and instrument protection are opposite and complementary. A high instrument reliability means a small instrument protection, whereas a poor instrument reliability means a large instrument protection. Resist the detection and process control instruments of chemical enterprises, and most of them are settled on process pipelines, various towers, kettles, tanks and devices.

The stability of weighing instrument in weighing sensor is within the defined conditions, and the skill of connecting certain functions of weighing instrument with time is called stability (degree). Instrument stability is a very considerate functional goal for instrument workers in chemical enterprises. Due to the harsh environment in which chemical enterprises use instruments, the temperature and pressure innovation of the measured medium are also relatively strong. In this environment, when instruments are used, some parts of the instruments will be depressed with the constant connection and stability, and the stability of the instruments will decline. There is no quantitative value for measuring or characterizing the stability of instruments, and chemical enterprises usually use zero drift of instruments to measure the stability of instruments. The stability of weighing instruments is directly related to the application field of instruments, and occasionally directly affects the chemical production. The influence caused by poor stability is even greater when the precision of double instruments decreases. Poor stability and large amount of instrument protection are the last things that instrument workers expect to present.

The sensitivity of weighing instrument is sometimes called "amplification ratio", which is also the slope of each point on the appropriate line of instrument static characteristics. Increasing the magnification can improve the sensitivity of the instrument. Simply increasing the sensitivity does not change the basic function of the instrument, that is, the accuracy of the weighing instrument does not improve, on the contrary, it occasionally shows signs of vibration, resulting in unstable output. The sensitivity of the instrument should be connected with the appropriate quantity.

For most customers, although the accuracy of instruments is a serious goal, in practical application, the stability and reliability of instruments are often emphasized, because few instruments for chemical enterprise detection and process control are used for measurement, but many are used for detection. In addition, the stability and reliability of detection instruments used in process control system are more serious than accuracy.