| 摘要 |
PURPOSE:To facilitate the reading of hourly correspondence to recording waveforms by switching recording pens for recording signals in various channels detecting intersections of the recording waveforms to perform a simultaneous recording on the common time basis. CONSTITUTION:Signals in channels (CH) 1 and 2 are compared in the level with a comparator circuit CM through amplifiers A1 and A2. When the CH 1 is above the CH 2 on the recording paper, switching circuits S1 and S2 are as illustrated according to an output of the comparator circuit CM and signals in CH 1 and 2 are fed to motors M1 and M2 separately. At this point, red is with a color switch SW1 and black with SW2. The signal of the CH 1 and the signal of CH 2 cross each other on the recording paper, the switching circuits S1 and S2 are changed with an output of the comparator circuit CM and the signal of CH 1 is supplied to the motor M2 while the signal of CH 2 to the motor M1. At the same time, red replaces black with the color switches SW1 and SW2. This enables simultaneous recording of signals in various CHs on the common time basis thereby facilitating reading of hourly correspondence thereof. |
