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The full name of IEC 60068-2-1 is Environmental Testing Part 2-1: Tests-Test A: Cold. It is edited by the IEC technical committee in 2008.We will introduce the IEC 60068-2-1 Environmental Testing Part 2-1: Tests-Test A: Cold The following is the original content of IEC 60068-2-1 IEC 60068-2-1 Environmental Testing Part 2-1: Tests-Test A: Cold This part of IEC 60068 deal with cold tests applicalbe to both non heat-dissipating and heat-dissipating specimens. For non heat-dissipating specimens, Tests Ab do not deviate essentially from earlier issues. Test Ae has been added primarily for testing equipment that requires being operational throughout the test, including the conditioning periods. The object of the cold test is limited to the determination of the ability of components, equioment or other articles to be used, transported or stored at low temperature. Cold tests cover by this standard do not enable the ability of specimens to withstand or operate during the temperature vari...

The full name of IEC 60068-2-75 is Environmental testing-Part 2-75: Tests- Test Eh: Hammer tests . It has been prepared by IEC technical committee 104:Environmental conditions, classification and methods of test. We will introduce the IEC 60068-2-75-1 Scope The following is the original content of IEC 60068-2-75-1. IEC 60068-2-75-1 Scope This part of IEC 60068 provides three standardized and coordinated test methods for determining the ability of a specimen to withstand specified severities of impact. It is used, in particular, to demonstrate an acceptable level of electrotechnical items. It consists of the application to the specimen of a prescribed number of impacts defined by their impact energy and applied in the prescribed directions. This part of IEC 60068 covers energy levels ranging from 0.14J (joules) to 50J(joules). Three types of test apparatus are applicable to perform these tests. Annex C provides some guidance to this aspect. Here is the IK level test (Impact Prote...

The principle of ultraviolet disinfection is to use ultraviolet radiation to cause photolysis and denaturation of bacteria proteins, and the amino acids, nucleic acids and enzymes of bacteria are destroyed and died. At the same time, when the ultraviolet rays pass through the air, the oxygen in the air is ionized to generate ozone, which strengthens the bactericidal effect. Ultraviolet is mostly used for disinfection of air and objects, with a wavelength of 253.7nm. For air disinfection, the effective distance does not exceed Zm, the irradiation time is 30 ~ 60min, for the disinfection of items, the effective distance is 25 ~ 60cm, the irradiation time is 20-30min, and the timer starts from 5-7min when the light is on. In order to ionize oxygen in the air to produce ozone). When the ultraviolet lamp used for disinfection is at a voltage of 220V, an ambient relative humidity of 60%, and a temperature of 20 ° C, the radiation intensity of 253.7nm ultraviolet rays should not be less than ...

The principle of ultraviolet disinfection is to use ultraviolet radiation to cause photolysis and denaturation of bacteria proteins, and the amino acids, nucleic acids and enzymes of bacteria are destroyed and died. At the same time, when the ultraviolet rays pass through the air, the oxygen in the air is ionized to generate ozone, which strengthens the bactericidal effect. Ultraviolet is mostly used for disinfection of air and objects, with a wavelength of 253.7nm. For air disinfection, the effective distance does not exceed Zm, the irradiation time is 30 ~ 60min, for the disinfection of items, the effective distance is 25 ~ 60cm, the irradiation time is 20-30min, and the timer starts from 5-7min when the light is on. In order to ionize oxygen in the air to produce ozone). When the ultraviolet lamp used for disinfection is at a voltage of 220V, an ambient relative humidity of 60%, and a temperature of 20 ° C, the radiation intensity of 253.7nm ultraviolet rays should not be less than ...