Handheld instruments that are usually not grounded should first be measured in accordance with 5.2.2.1. Then use the simulated hand specified in 5.1.4 for additional measurements. The general principle of using a simulated hand is to wrap all handles attached to the appliance with metal foil, including fixed and detachable handles, and the M-end should be connected simultaneously to exposed, non rotating metal parts as specified in 5.2.2.2.2 to 5.2.2.2.4. Metal parts covered with paint or paint on the surface are considered bare metal parts and should be directly connected to the M-end of the RC component. The application of simulated hands is only applicable to the parts of the handle and handle, as well as the equipment specified by the manufacturer. If there are no manufacturer's instructions, the analog hand should be applied as follows: when the shell of the appliance is completely metal, metal foil is not required, but the M-end of the RC component should be directly connected to the shell of the appliance. When the outer shell of the appliance is made of insulating material, the metal foil is wrapped around the handle, as shown in handle B in b) of Figure 8, and if any, the auxiliary handle D is also included. A 60mm wide metal foil should also wrap around shell C, which is located at the stator core of the motor, or if the gear causes a high disturbance level, wrap around the gearbox. All metal foils, circlips or retaining rings A, if any, should be connected together and then connected to the M end of the RC element. When the outer shell of the appliance is made of metal and some parts are made of insulating material, and there is an insulating handle, the metal foil should be wrapped around the handle. If the outer shell of the motor is non-metallic, a 60 mm wide metal foil should be wrapped around the shell C, which is located at the stator core of the motor or around the gearbox. If it is made of insulating material and causes a high disturbance level. The metal part of the shell, point A, the metal foil wrapping handles B and D, and the metal foil on shell C should be connected together and then connected to the M end of the RC element. When a Class II device has two insulated handles A and B and a metal shell C, such as an electric circular saw [c) in Figure 8], the metal foil should wrap around handles A and B. The metal foil and metal shell C of A and B should be connected together and then connected to the M end of the RC component

Note: Categories 0,1, II, and III are classified according to the general part of IEC 61140 for electric shock protection devices and equipment