9 The insulation resistance measured when 500Vd.c. is applied between the power circuit lead and the protective earthing circuit shall not be less than 1MΩ.

10 All exposed conductive parts of the counting machine should be connected to the protective bonding circuit according to the requirements of 8.2.1 in GB5226.1-2008. The connection between the grounding terminal or the grounding contact and the grounding metal part should have a low resistance value, and its resistance value should not exceed 0.1Ω, and the grounding resistance test should be used to determine whether it is qualified.

11 The power circuit lead and the protective connection circuit of the electrical equipment should be subjected to a withstand voltage test for at least 1s.

12 The safety protection of the counting machine shall comply with the following regulations: a) The safety protection of the counting machine shall comply with the provisions of JB 7233. b) There should be clear and eye-catching safety warning signs on the counting machine. Safety signs shall comply with the provisions of GB2894 and GB/T 16273.1. c) The counting machine should be equipped with interlock protection. When there is a lack of material, no bottle at the inlet, or blockage at the outlet or misoperation, it should alarm and stop the machine.