| 摘要 |
A device is disclosed to compare the data measuring value corresponding to each condition with the reference established range in several conditions and to select only custom IC of a good quality. The device characterizes that one chip computer is connected with each latch buffer circuit, a display driving circuit and a general printer apparatus, so as data to be exchanged; one side latch buffer circuit is connected to D/A converter and an output terminal side of another latch buffer circuit is connected with the D/A converter, a multiplexer and bases of a transistor, and other latch buffer circuit is connected with multiplexers, the display driving circuit and the printer apparatus; and respective terminals of the custom IC are connected with the multiplexer, an inverter, a peak detector, a relay switch, an amplifier, a supply power part, etc.
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