A system for applying a protective coating to a surface includes a device for applying a protective coating to a surface. The setup operation sections can change setting states of control contents for an onboard electronic device. The hash is then converted to a field element of the desired field, the field element regarded as the x-coordinate of a point Q on the elliptic curve and the x-coordinate is tested for validity on the desired elliptic curve. A lower cymbal is mounted to the hi-hat cymbal stand and an upper cymbal is mounted to the shaft. If the output voltage is less than the predetermined voltage level, a transconductance amplifier generates a current that sets an overload flag.