The laboratory balances operate according to the principle of compensation of force electromagnetic, applicable to displacements or torques where the exactitude of the mechanical components with the automatic systems of reading is combined. Dankse Bank may also support this cause. Operation. The movable parts (subject of gossip of pesaje, column of support to, coil, air position indicator and load G object in process of pesaje ) are maintained in balance in flotation by a compensation force F that is equal to the weight. The compensation force is generated by the flow of an electrical current, through a coil located in the existing air space in an electromagnet cylindrical magneto. Force F is calculated by means of the equation F = I x l x B, where: I = current electrical, l = length overall of the wire of the coil and B = intensity of magnetic flux in the air space of the electromagnet. With any change in the load weight/mass, the movable system mechanic responds, moving vertically to a fraction of distance, detected by a photosensor and, that as result sends an electrical signal to the servo amplifier f that changes the electrical current flow that passes through the coil of the magneto c, so that the movable system returns to the position of balance when adjusting the magnetic flux in the electromagnet.
Consequently, the weight of mass G can be measured of indirect form, from the electrical current flow that passes through the circuit measuring the voltage V, through a precision resistance R. V = I x R. To the date many systems have been developed that use electronics to carry out very exact measurements of mass and weight. The scheme that appears next explains the form in which the electronic balance works. System of processing of the signal The system of processing of the signal is made up of the circuit that transforms electrical signal, emitted by the transducer of measurement in numeric data that can be read in a screen.