Clamp meter, in particular for an earth loop, including a jaw secured to a stationary mounting and a jaw pivotably mounted on the mounting

摘要

The clamp has a movable jaw (4) mounted on a support to move between a closed position in which end of the jaw is urged to contact with end of fixed jaw (2) and an open position. A traction spring (R) urges the movable jaw to the closed position. The movable jaw is located on an arm (7) of lever (6), and another arm forms a control trigger (5) to pivot the lever between the positions. A device (16) for scaling-down pressure force (Fap) applied to the trigger to open the clamp relative to force maintaining the jaw in the open position. The device is mounted between the spring and the trigger.