Adjustment process of an electronic trip device

An adjustment process of an electronic trip device comprising an analog channel whose input is connected to means for measuring current, the channel comprising at least a measuring resistance connected to the means for measuring current and at least a first operational amplifier connected to the terminals of the measuring resistance, a process comprising a stage producing, by serigraphy on a hybrid circuit, the measuring resistance and an offset voltage compensating resistance, having preset minimum values, and an offset voltage compensating stage consisting in injecting successively first and second currents of preset values to the input of the channel, of measuring corresponding first and second output voltages of the channel, of injecting a third current of preset value, and of adjusting, by laser, the value of the offset voltage compensating resistance so as to obtain an output voltage equal to the product of the third current and of the ratio between the difference between the first and second output voltages and the difference between the first and second input currents.