Method for testing functions of painting apparatus and apparatus for the same

A method for testing functions of painting devices of a painting apparatus, said painting devices including an air supply source, an air motor driven by air from said air supply source, a supply pump operated by said air motor, a plurality of paint tanks each containing paint, a valve selector for switching paints to be used, a spray gun having a switching cylinder, a spray nozzle for spraying the paint, and a pressure controller for adjusting the pressure applied on the paint to be sprayed, said paint being sprayed from said spray gun by sucking said paint from one of said paint tanks with said supply pump;

• said method for testing functions of painting devices comprising the steps of:
• providing a first fluid pressure sensor between said supply pump and said valve selector and a second fluid pressure sensor between said valve selector and said spray gun;
• providing a first air pressure sensor between said air supply source and said air motor and a second air pressure sensor between said air supply source and said pressure controller;
• measuring a supply pressure and an exhaust pressure of at least one of said air motor, said supply pump, said valve selector and said pressure controller, by said fluid pressure sensors and said air pressure sensors;
• and
• comparing the measured supply pressure and the measured exhaust pressure, thereby testing the functions of said painting.