which itself has several subsections including weight sensor (load cell), distribution box, connection wires, indicator, printer, outdoor display, traffic light and roadblock. From among the above electronic parts, we will suffice to introduce the equipment that is necessary for setting up any scale:

3.1. Load cell (Load cell)

Weight sensor (weight sensor) or load cell is the name of a converter that is designed and built with the purpose of converting pressure caused by weight into voltage and electrical fluctuations.

< p> This piece has a special type of metal and flexible alloy in its central core, which bends a few hundredths of a millimeter when pressure is applied to it, and returns to its original state after releasing the pressure. At the same time, the strain gauges attached to different levels of this alloy convert this very subtle bending and deformation into electrical oscillations (in the range of microvolts) and distribute it through the wire to the box and finally to the weight indicator. Baskol sends.

Load cells have compression (barrel), tension (S shape), and bending (single point and multiple) types; that various types of compression load cells are used in the production of road scales, all types of tensile load cells are used in the production of scales and ceiling scales (hanging), and all types of bending load cells are used in the production of shop scales, bascules and pan scales.

3.2. Connecting wires (Connecting wires)

As its name suggests, it has the role of connecting and transmitting voltage and electrical fluctuations from the load cell to the distribution box, and from the distribution box to the indicator.

The importance of connecting wires is that the type of material and its coating must be specific, and even its diameter and length must be a specific and fixed value. Because all these characteristics have a direct and significant effect on the electrical resistance of the wire; Especially, the voltage changes and electric fluctuations passing through it are very weak (microvolts) and sensitive, and the smallest change in the above characteristics will cause a huge error in weighing.

3.3. Junction box, which is called J.box for short, works like a junction box in the wiring of the building; and is an electrical (and sometimes electronic) piece that unifies the wires coming out of It has load cells for the entry of only one wire to the weight indicator.

The important point about the distribution box is that this part works in the best possible way for the greater accuracy of the scale and causes the least possible error in weighing. It is possible that it does not change the voltage and electric fluctuations coming out of the load cells and only has the role of parallelizing and unifying the electric fluctuations together; And in this case, the distribution box will be an ideal electrical part.

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