Electrical resistivity is a physical quantity used to represent the resistance characteristics of various substances. The resistance of a wire made of a certain material that is 1 meter long and has a cross-sectional area of 1 square millimeter is called the electrical resistivity of this material. In the International System of Units, electrical resistivity

The unit is ohms per meter, and the commonly used unit is ohms per square millimeter per meter. Electrical resistivity testing has become the most important task in our electrical engineering industry. In addition to improving construction safety, it can also ensure the safety of electrical engineering

ofquality

Test method for electrical resistivity of insulation materials

Insulation materials refer to a type of conductor material that has extremely poor power failure performance and almost no current flow inside, that is, almost non-conductive. Common insulation materials include glass, plastic, dry wood, ceramics, and so on.

Insulating materials are widely used in various fields due to their non-conductive properties. They can solve electrical safety problems and protect us from electric shock and fire disasters caused by improper use of electricity. Conductors with good conductivity

Compared to bulk materials, measuring the resistivity of insulating materials is actually more convenient. Due to their high resistance, their resistivity can also be very high. Generally, their volume resistivity and surface resistivity are basically the same.

The method for measuring the resistivity of insulation materials and the method for measuring the resistivity of conductors are the same. The volume resistivity of the insulator can be obtained by dividing the total resistance by the volume of the insulator, and the total resistance can be divided by the volume of the insulator

The surface area can be used to obtain the surface resistivity of the insulator. Alternatively, we can use specialized resistivity testing tools for testing.

Resistance testing standard:

1. GB 12014 Anti static Work Clothes;

2. GB/T 26825-2011 Anti static and Anti corrosion Adhesive;

3. GB 4385-1995 Technical Requirements for Anti static Shoes and Conductive Shoes;

4. GB/T 24249-2009 Anti static clean fabrics;

5. GB 50515-2010 Code for Design of Conductive (Anti static) Grounds;

6. GB/T 20991-2007 Test Methods for Personal Protective Equipment Shoes;

7. GB/T 18044-2008 Carpet Static Behavior Evaluation Method Walking Test;

8. GB/T 15738-2008 Test Method for Electrical Resistance of Conductive and Antistatic Fiber Reinforced Plastics;

9. GB/T 12703.4-2010 Evaluation of Electrostatic Properties of Textiles Part 4: Electrical resistivity;

10. GB/T 18864-2002 Limits of electrical resistance for antistatic and conductive products used in vulcanized rubber industry;

11. GB/T 22042-2008 Test method for surface resistivity of anti-static performance of clothing;

12. GB/T 12703.6-2010 Evaluation of Electrostatic Properties of Textiles Part 6 Fiber Leakage Resistance;

13. GB/T 1410-2006 Solid insulation materials - Test methods for volume resistivity and surface resistivity;

14. GJB 5104-2004 General Requirements for Anti static Coatings and Electrostatic Performance of Radio Fuze Wind Hats.