| 摘要 |
PURPOSE:To intuitively easily read the display of a variable power rate and to prevent it from being read by mistake by executing the display of the variable power rate with the aid of analog display by a scale plate and a pointer. CONSTITUTION:A variable power rate input means 72 is provided with a magnifying key 73, an unmagnification key 74 and a reduction key 75 and they are respectively connected to a controller. Then, the display of a variable power rate display means 76 is moved by one measure through the controller every time the key 73 and the key 75 are depressed. Besides, the display is immediately returned to the display of unmagnification when the unmagnification key 74 is depressed. The display means 76 is the meter of the analog display, where the pointer 78 is provided in concentric with the scale plate 77 so that it is freely turned. Besides, a designation part 78a which is freely moved along the scale plate 77a is provided. Thus, the desired variable power rate is easily read and surely set. |
