| 摘要 |
PURPOSE:To use an input device for any of a resistance input and a thermoelectric and a voltage input in common by switching the circuit constitution of an input circuit by a selecting means. CONSTITUTION:The selecting means 2 is set as shown in a figure to ground a terminal 20 and connect a measurement voltage E for a thermocouple, etc., between terminals 11 and 12, and then this circuit operates as the input circuit for the voltage input. On the other hand, when the selecting means is switched to connect a constant current source I to the terminal, this circuit operates as a resistance input circuit by connecting a temperature measuring resistance such as a thermistor between the terminals 11 and 12 and connecting the terminals 12 and 13 directly.
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