DK857B

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Panel meters refer to the electronic measuring device used to measure and display the current, voltage, power, signature waveform, circulation data and other parameters of the electrical signal in the circuit. DK857B is a widely used panel meter, with high reliability, good stability and excellent expansive measuring range. It has a wide application field and is widely used in the electric power industry, telecom industry, scales, mechanical and electrical equipment and other fields.

DK857B application field

DK857B is widely used in multiple industries, such as machinery, electrical, energy, water conservancy, industrial control, environmental protection, defense industry, communication, etc. It is mainly used for various current, voltage, electric energy, frequency, temperature, humidity and other data acquisition, display, control and alarm in electronic equipment. It can also be used in instrumentation, testing rooms and power plants, as well as in field control systems, such as distributed control systems, measuring and alarm systems. In order to better meet the needs of various users, DK857B\'s specific application fields can be divided into simple measuring instruments, main control panels, industrial instrumentation systems, basic automatic control systems, distributed control systems, measuring and alarm systems, field control systems, etc.

DK857B working principle

DK857B works by converting the input analog signals into digital signals, which are then displayed in the form of digits, letters or graphic symbols. It consists of five parts: a signal conversion unit, an all-digital programmable integrated circuit unit, a timing unit, a display unit and a power supply and driving unit. The signal conversion unit is mainly composed of an A/D converter, a signal acquisition circuit, an input and output isolation circuit and a temperature compensation circuit. The A/D converter is mainly used for signal collecting and sampling, and the signal acquisition circuit is used to expand the dynamic range of A/D and improve the measuring accuracy of the system. The display unit is mainly composed of a liquid crystal display (LCD) or LED display and driving circuit.

In general, the all-digital programmable integrated circuit unit is mainly used to convert the digital signal from the signal conversion device into useful data, and then to control the display of the display by a display data line. The timing unit is mainly used to control the sampling period and the measuring period of the signal. The power supply and driving unit converts the DC voltage from the power supply into the voltage required for the display unit, and drives the light source of the display unit, that is, the LCD or LED.

DK857B is characterized by high reliability, good stability and excellent expansive measuring range. Its working principle is simple and practical. It has a wide application field and is widely used in many fields.

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