| 摘要 |
PURPOSE:To facilitate a search for a school of fish, by recording a water temperature curve on recording paper all the time while synchronizing one cycle period of a coupler which performs repetitive counting operation with one shift display period. CONSTITUTION:Information 1 on measured water temperature is outputted from A-D converting means 2, 4-6 in the form of such a number of pulses that 10 deg.C temperature corresponds to N/2 pulses and counted, and N pulses are sent out of a latch 7 within the recording run time of a pen 15. The counter 8 counts those poulses and returns to a minimum value (maximum value) once the counted value reaches the maximum value (minimum value) to send out a coincidence signal when the counted value coincides with the maximum (minimum) value; and the pen 15 records the water temperature on the recording paper 19 at intervals of shift switching with 10 deg.C difference. |
