絶ぜつ縁えん抵てい抗こう計けい

noun

insulation resistance tester; megohmmeter

A measuring instrument used to test the insulation resistance of electrical equipment and wiring. Also called a megohmmeter or 'megger' (brand name).

• 電でん気き工こう事じの前まえに、絶ぜつ縁えん抵てい抗こう計けいで配はい線せんの絶ぜつ縁えんを確かく認にんします。

  Before electrical work, we check the insulation of the wiring with an insulation resistance tester.