seadis näidu nullimiseks, kui kandur on koormusvaba, device for setting the indication to zero when there is no load on the load receptor, seadis näidiku nullimiseks, kui tankur ei väljasta kütust, seadis mõõtevahendi näidu nulli seadimiseks, ancillary device for setting the indication to zero either by manual operation or by means of an automatic system, device which allows the setting of the indicating device to zero when the load receptor is empty