vibrations of the weighing sensor at constant loading of the weighing sensor 10 this signal is rectified and slightly smoothed block 14 wherein the diode and the capacitor in the drawing symbolize this generally and should not be construed as being limited to one way point rectification and is thus proportional to the average alternating current component of the output signal of the weighing sensor 10 on the one hand the signal is then supplied to a threshold comparator 15 as known in the prior art if the signal level is below the threshold the threshold comparator 15 causes the gram symbol u201c g u201d in a display 16 to light up on the other hand the signal is supplied to an arithmetic logic unit 18 via a squaring element 17 in the arithmetic logic unit 18 a corrected output signal m u2032 is calculated from the uncorrected input signal m of low pass filter 12 and a correction signal x 2 of the squaring element 17 according to e g the following formula if the installation site is steady i e x 2 0 then m u2032 m if the installation site is unsteady an addend that is proportional to the square of the.