| 摘要 |
PURPOSE:To make a controller portable and to obtain a bubble output signal with high reliability by disposing a sensor amplifier circuit of a bubble control circuit mounting print board in one case so as to move said board from a power source control circuit mounting print board. CONSTITUTION:A bubble control circuit mounting print board 83, a power source control circuit mounting print board 84 and a dry battery 40 are built in the interior of an upper case 81 and a lower case 82, both of which are made of resin molded products having recessed cross sections, and a cassette memory 60 is connected to the interior. The board 83 is mounted by an interface circuit, an indirect peripheral circuit and a direct peripheral circuit, and further it is mounted by a connector 93 to which a memory 60 is connected and a cover installation recognition switch 94, while a connecting cable 95 to a host system is introduced. The direct peripheral circuit includes a sensor amplifier 98, and positioned on a battery box 91 so that the amplifier 98 can be away from the board 84; therefore said circuit is hardly affected by noises. |
