| 摘要 |
PURPOSE:To enable to directly read the set time and rest time accurately, by giving coincidence between the rest time display scale and the set time scale of a dial juxtapased on the set time dial provided in relation with the operating knob of a variable resistor. CONSTITUTION:A voltage corresponding to a control input voltage is taken as the reference voltage and the digital count output of a counter 13 is converted into an analog voltage, allowing a D/A conversion circuit 15 to output a voltage corresponding to the rest time. Further, the output voltage of the circuit 15 is classified in a level into a number of stages with a given scale, and the result is displayed with a number of display elements by a rest time display level meter 18. The display elements of the meter 18 is juxtapased also on the set time dial provided in relation with the operating knob of the variable resistor 12, and the rest time display scale of this meter 18 and the set time scale of the dial are made in coincidence. Thus, the set time and the rest time can easily be directly read accurately. |
