| 摘要 |
PROBLEM TO BE SOLVED: To realize a measuring device capable of performing contact check without caring the contact on-resistance of a switch. SOLUTION: In a measuring device for measuring an object to be measured 1 by contacting, arranged are a constant current source 26 sending a constant current for contact check from a power source 23 for measurement and another system power source and switch parts 21 and 22 connecting to the wire for measuring the object to be measured and to the constant current source 26 and turning on when checking the wire. Contact check is done by resistors R1 to R4 in the wiring.
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