| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately determine an incorrect wiring of N line and E line. <P>SOLUTION: A wiring confirmation tester determines whether a N line and an E line are incorrectly connected to a receptacle including a first terminal to which a L line for supplying single phase AC voltage with a first frequency is connected, a second terminal to which the N line is to be connected, and a third terminal to which the E line is to be connected. The tester comprises: a power source for flowing a current I including a second frequency different from the first frequency between the second terminal and the third terminal; a first measurement circuit for measuring a voltage signal V<SB POS="POST">21</SB>between the first terminal and the second terminal; a second measurement circuit for measuring a voltage signal V<SB POS="POST">13</SB>between the first terminal and the third terminal; and a detection circuit for detecting a magnitude relation in frequency components corresponding to the second frequency which are included in each of the voltage signal V<SB POS="POST">21</SB>measured by the first measurement circuit and the voltage signal V<SB POS="POST">13</SB>measured by the second measurement circuit. <P>COPYRIGHT: (C)2013,JPO&INPIT |
