| 摘要 |
PURPOSE:To enable the detection of short-circuiting easily in a short time between circuit patterns, by changing over a switching element to continue the inspection when any short-circuiting takes place between the circuit patterns. CONSTITUTION:When a contact connected to a terminal 4 is brought into contact with a circuit pattern with the terminal 4 connected to the ground, in case of any short-circuiting between this circuit pattern and another circuit pattern, the other circuit pattern short-circuited and the input terminal 51 connected thereto is grounded through the terminal 4 and a short-circuiting detection circuit 5 shows a short-circuiting with a short-circuiting display circuit 7 through the input terminal 51. Thereafter, likewise, the terminals are connected sequentially to the earth up to the (n)th terminal 4 to enable the detection of a short-circuiting in al the circuit patterns. In this case, the changeover of a switching element 6 is all done automatically with a control section 9 from the grounding of the first terminal 4 to the grounding of the (n)th terminal 4.
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