Shenzhen United Testing Technology Co., Ltd

Its own common mode current is transmitted to a device that interconnects with it. This phenomenon is called conduction interference, also known as conduction emission.   Conductance emission consists of two parts:   Power terminal   CE and communication terminal CE Power terminal CE: The interference that the test equipment transmits to the AC grid or DC distribution network through its own power port, and the test frequency band is 150 kHz ~ 30 MHz. Communication   terminal CE: The test frequency band is the same as above. The communication terminal described here refers to the port connected to the public network, such as network port and ISDN port, only with CE test requirements, while there is no CE requirement for the signal port of the connecting terminal, such as audio and video port. www.uni-lab.hk/

  EU Standard: EN60335-2-2:2003 + A1:2004 + A2:2006 EN60335-2-2:2010 + A11:2012 + A1:2013 Australian Standard: AS / NZS 60335.2.2:2010 + A1:2011 + A2:2014 + A3:2015 + A4:20 American standard: FCC certified pare15 International standard:   IEC60335-2-2:2002 + A1:2004 + A2:2006 IEC60335-2-2:2009 + A1:2012 + A2:2016 IEC60335-2-2:2019 Chinese standard: GB4706.7-2014 United Testing lab could meet the various national safety standards.

  Composite salt spray test is also called cyclic corrosion test, cyclic corrosion test (cct) is mainly used in the automotive industry, on the basis of constant salt spray test introduced the high temperature, humidity, low temperature, drying parameters, as far as possible to consider many factors in the natural environment, aims to achieve higher correlation with the natural environment test results. The purpose of the composite salt spray test is to confirm the ability of the objects to be tested to tolerate the salt spray environment, and to use the mutual circulation of salt spray and moisture to simulate the actual use environment. It is suitable to assess the electrochemical corrosion effects of metal materials and salt particles. Salt spray test stage: Generally speaking, in addition to naCl (sodium chloride), an electrolyte containing other chemicals can also be used to simulate acid rain or other industrial corrosion. Wet test stage: the test procedure usually requires high

  When the electrostatic charge accumulated in the human body, instrument or equipment will form a discharge path in contact with the electronic product, instantly making the electronic components or system damaged by electrostatic discharge. So electrostatic discharge is a very important test item in the EMC test.   I t i s divided into direct discharge and indirect discharge. Direct discharge, that is, using the discharge click to directly discharge the test equipment, which is divided into contact discharge and air discharge. Indirect discharge, that is, the discharge of the coupling plate near the test equipment, to simulate the discharge of the human body to the object near the test equipment.

  -Valve-controlled lead-acid storage battery (IEC / EN60896 / GB19638) -Starting type lead-acid battery (IEC60095 / GB / T5008) -General-purpose battery pack (IEC / EN61056) -Traction storage battery (IEC/EN60254/GB/T7403.1-2008) -Nickel-metal hydrogen (cadmium) battery (IEC / EN61951 / GB22084) -Primary cell (IEC60086), etc

  MTBF, the mean time between failure , is the reliability indicator of the lamp.Unit is hours. It reflects the time quality of the product, is to reflect the lamp to maintain function within the specified time. Specifically, it refers to the average working time between two adjacent failures, also known as the average fault interval. In general, the light and lamp failure is high reliability, the ratio of the total number of faults of the product to the total number of life units is called Failure   R ate. It is the only one intended for serviceable products. The ratio of the cumulative working time to the number of failures in the total use phase is also set as MTBF. Lighting MTBF calculation is the inefficiency of each device. But because the device in different environments, different use conditions under its inefficiency will be very different. MTBF has three test methods, which can complete the needs of MTBF test. They are the expected calculation method, experimental test method

1. Sign and instructions 2. Protection against touching the live parts 3. High and low pressure operation 4. Energy consumption 5. Temperature rise 6. Overload operation 7. Electrical resistance strength and leakage current under working state 8. Moisture resistance test, etc www.uni-lab.hk/

  Space radiation, conduction radiation, noise, power radiation, magnetic field radiation, low frequency interference, electrostatic discharge, radiation disturbance, pulse group disturbance, surge disturbance, conduction disturbance disturbance, power frequency magnetic field disturbance, voltage drop, harmonic current, voltage flicker. www.uni-lab.hk/

LVD electronic & electrical safety: EN 60598-1 EMC test standard: EN 55015  

  There are the following considerations: 1. The electromagnetic spectrum is limited The frequency band of each line has different functions. If each electronic product radiates disorderly electromagnetic waves, then thousands of electronic devices are launched, and the electronic devices of each frequency band will become extremely fragile (normal work will be disturbed at any time by other products). This is also designed to protect the normal operation of various electronic devices. 2. Safety factors For many products and industries, EMC's performance can mean life and death. Many medical, military, industrial (such as power products, financial equipment), aerospace and automotive products (and other products) must be kept safe. 3. Economic factors The electromagnetic interference of electronic equipment is u ndetectable and accidental. It is difficult to determine the cause and source of problems. There are a lot of lawsuits caused by wireless transmitters, so controlling them

IC is short for Industry Canada, as a government agency, responsible for the certification of electronic and electrical products into the Canadian market. Its products are roughly divided into radio and television equipment, information technology equipment, radio equipment, telecommunications equipment, engineering and medical equipment, etc. Similar to FCC in the United States, IC currently only restricts electromagnetic interference. www.uni-lab.hk/

  Electronic materials / chemicals refer to the materials used in electronic technologies and microelectronics technologies. Electronic materials are not only the material basis of the development of modern electronic industry and science and technology, but also a technology-intensive discipline in the field of science and technology. The purity, cleanliness and related physical and chemical indicators of electronic chemicals have a serious impact on the electrical performance, yield and reliability of the products. Therefore, strict quality control and accurate analysis are needed in the production, circulation and use of electronic chemicals. Example of common test items of electronic products: failure analysis Chemical performance test metallic element size distribution The number of particles The anion test Organic analysis inorganic analysis Environmental reliability test Aging performance test complexity analysis What are the common standards for electronic material detection?

  The hair straighter, also known as an electric splint, is an electrical appliance that can convert electrical energy into heat energy and act on the hair to make it go straight. But now the hair straightening device mostly can straighten the hair, also can change the hair curly, and the use is convenient, by the love of beauty people love. H air straighter export to the European Union needs to transact CE certification, generally need to meet EMC electromagnetic compatibility and LVD low voltage directive .

  According to the relevant part of the United States Federal Communications Regulations (Part CFR 47), all electronic products entering the United States (mainly for the working frequency of 9 KHz-3000GHz) need to undergo electromagnetic compatibility certification (FCC certification), so FCC certification is mandatory in the United States. www.uni-lab.hk/

  Intelligent switch   is   the unit that uses the combination and programming of the control board and electronic components to realize the circuit intelligent switch control. Switch control, also known as BANG-BANG control, is simple and easy to implement, so it is adopted in the control of many household appliances and lighting lamps. Intelligent switch belongs to AV / IT products, entering the US market needs to apply for FCC-ID certification. Contact us if you need. www.uni-lab.hk/

  CPC (Children's Product Certificate) certification of toy bricks should be provide in Amazon USA, which includes ASTM-F963 and CPSIA.

Abrasi ve   resistance testing is the ability of the material to resist mechanical wear. Under the grinding condition of a certain load weight, the grinding of unit area per unit time. E xpressed by the wear amount of the sample, it is equal to the difference between the pre-grinding mass of the sample and the post-grinding mass divided by the wear area, by the reciprocal of the wear rate or wear degree of the material under the specified friction conditions. Effect of a brasi ve   resistance test ing : Wear and tear is a common phenomenon in the industrial field and daily life. Many reasons for this phenomenon , physical, chemical and mechanical, mainly abrasive wear, adhesive wear (bonding), fatigue wear (pitting), corrosion wear, which is an important reason for the loss of materials and energy. Wear problem covers a wide range.   Material wear resistance as an engineering research, its purpose is the product manufacturing and product production process of wear problems and study ho

  FCC-ID is mandatory for active wireless transmission equipment. After passing the test, it will be issued by CCB institutions and registered on the FCC official website. The common test criteria are as follows:

  FCC SDOC For non-wireless transmission products, the test criteria are as follows:

  It is well known that Britain has left the EU. From January 1,2021, products requiring CE identification in the EU market and UKCA identification and manufacturer conformity statement when entering the UK market. UKCA mark, like CE mark, the manufacturer is responsible for ensuring that the product meets the standards stipulated by the decree and making self-declaration in accordance with the prescribed procedures, before making the corresponding mark on the product. Why cooling leafless fans exported to the UK need UKCA: The UKCA certification indicates that the product has met the safety requirements of the UK Directive; it is a corporate commitment to the consumer that increases their trust in the product. After handling UKCA, it can not be investigated by market supervision agencies, not be detained by the customs, and not be reported by peers. Note: UKCA is not suitable for products entering Northern Ireland. The UKCA logo can not be used in the Northern Ireland market alone. Ad

  E lectromagnetic compatibility   EMC test refers to EMI   and EMS of electronic products in terms of electromagnetic field. It is one of the most important indicators of product quality. The measurement of electromagnetic compatibility is composed of test site and test instruments. EMC test environment 1. An o pen outdoor space 2. Screening room 3. Wave dark room EMC compatibility test equipment 1. The electromagnetic interference measurement equipment 2. E lectromagnetic sensitivity measurement equipment EMC test method 1. Conduction and transmission test 2. Radiation emission test 3. Conduction sensitivity (immunity) test 4. Radiation sensitivity (immunity) test EMC EMC test preparation 1. Test site conditions: EMC test laboratory is a radio wave semi-dark room and shielding room. The former is used for radiation emission and radiation sensitivity tests, while the latter is used for conduction emission and conduction sensitivity tests. 2. Environmental level requirements: the condu

The wireless transmission frequency range of Plug-on Transmitter is generally: 537-600 MHz, so when doing CE-RED certification, the RF test standard is ETSI EN 300 422, and the test standard of FCC-ID is FCC PART 15C. www.uni-lab.hk/