Products Information Apparatus for verification of maximum.minimum force MF-1 Product details: Model MF-1.The HT Socket.Plug Strength Tester is designed to meet the exacting requirements of major international standards such as IEC 60884-1 Fig 18.Fig 19. The clamping system is easy to operate. The top plate swivels up from a horizontal position to a vertical orientation.the clamping device can be rotated in the top plate. These features allow the device to be set up in many different configurations to meet different standard requirements. Standard plugs.weights are supplied to perform testing on sockets rated up to 16A. Pin gauges.the appropriate weights for testing minimum withdrawal force are sold separately. The required dimension of the pin gauge need to be specified by the customer. Test plugs made from hardened steel with roughness not exceeding 0.8mm. Top plate pivots from horizontal to vertical.