The weighing display adopts ExibllCT4/5 ExiaIICT6 6 explosion-proof grade, and adopts various technical measures such as voltage reduction, current limiting, isolation, sealing and optical communication to eliminate or block the possible detonating sources (electrical sparks, electrostatic sparks, high temperature, etc.) in the electrical circuit of the electronic scale, so that the weighing instrument can work safely in the corresponding dangerous area.

Weighing instruments use load cells (can be mechanical strain gauge or stress type, or even composite) to detect the weight, generally are three-point or four-point sensors, using ratio type A/D conversion and frequency doubling technology, measurement performance in the long term stability is good. The software can truly simulate the vibration, empty scale change, material fall and other weighing characteristics, display fast, accurate and stable. There is an empty scale zero, zero tracking, calibration, weighing, indexing and other parameters of the setting unit, easy to change the strong versatility. With output interface, it can be connected to a variety of external devices to realize system control conveniently.

Weighing Instrument converts the load cell signal into weight digital display, and can store, count and print the weight data. It is commonly used for automated batching and weighing in industrial and agricultural production to improve production efficiency, and is a typical secondary instrument. It is a typical secondary instrument. Weighing instruments are mainly used for the display of weight figures in weighing systems, such as the display of load carrying capacity in bridges, roads and transportation projects, and the display of dosage measurement in chemical industry.

The main function of weighing instrument is to measure the mass of the weighed object on the scale through the load cell and convert it into a digital signal for display. With the progress of microelectronics technology, weighing instruments have been developed rapidly, and are now mostly digital weighing instruments. It not only can be weighed quickly and accurately into a simple and easy to read digital form, but also to complete the zero, zero tracking, tare, self-test, calibration and other control functions.

Weighing instrument refers to an electronic weighing instrument that displays the mass and weighing state of the object. It is composed of error amplifier, reversible motor, balance bridge, excitation power supply, dial and pointer, etc. It adopts measuring amplifier structure to accept and amplify the signal of weighing sensor. Magnification is usually hundreds of times. The filter unit filters out electrical noise from outside the machine and generated by the amplifier itself. A/D conversion unit converts analog to digital, and the transposition number is usually more than 14 bits of binary number. The data processing unit is composed of microprocessor as the core and peripheral support chip, which completes a series of operations such as data acquisition, operation and storage under the control of program, and the processing results are sent to the corresponding interface.

The instrument is composed of a power supply circuit, a weighing signal acquisition circuit, a microcontroller peripheral circuit, an LED display module, a communication interface circuit, a switching keypad and an external memory. It supports various human-machine dialog modes such as network interface, USB interface, RS232, touch screen, etc. The weighing instrument is RS485 interface communication mode, and it adopts DC5V power supply through USB socket, and it can be powered by commercially available adapter or rechargeable treasure.