| 摘要 |
When performing tuning in a dark location with a conventional method of lighting a meter by using an LED light, expression can only be performed by a single color of light. Further, there is a problem in that the behavior of a needle indicator is difficult to verify. Provided is a tuning device with which tuning can be performed easily, even in a dark location. By providing a meter in which a fluorescent coating is applied to a needle indicator portion or a graduated scale portion, and providing an LED capable of emitting sufficient energy to cause a fluorescent material to emit light, the needle indicator portion or the graduated scale portion can be made to emit light. Tuning in a dark location thus becomes easy.
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