METHOD FOR ALTERING FILM THICKNESS MEASURING CONDITIONS OF WIRELESS FILM THICKNESS METER

PURPOSE: To achieve correct measurement of film thickness quickly by selecting a probe of either an electromagnetic type or a high frequency type and sending film thickness data to a measuring rotary body by radio communication to select or switch any one of constants or expressions. CONSTITUTION: In a probe 21, a film thickness measuring signal obtained from an inductance element connected to a measuring device 31 is converted into a digital signal by an A/D converter 32. A transmitter 33 converts ID of a probe of either an electromagnetic type or a high frequency type built in a memory and the digital signal into a specified code to be transmitted to a modulator 34. After the code is modulated by a harmonic signal from a harmonic oscillator 35, it is amplified 36 and a radio wave is transmitted from a transmitting antenna 37. An arithmetic controller stores a measuring system data indicating the distinction of the measuring system in a memory and compares measuring type data received together with film thickness data transmitted by the radio wave from the probe 21 with measuring type data stored in the memory. When it differs, the measuring system data stored in the memory are changed over.