Shenzhen United Testing Technology Co., Ltd

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 evaluate the electrochemical corrosion effect of metallic materials and salt particles. Composite salt spray test usually consists of three parts: salt spray test stage, moisture test stage and drying test stage. Salt spray test stage: Generally speaking, in addition to naCl, the electrolyte containing other chemicals can also be used ...

  1. The EU RoHS Directive 2015 / 863 / EU is the core regulation of the RoHS certification, which sets limits for 10 harmful substances. 2. IEC 62321:2008, the Determination of Hazardous Substances in Electrical and Electronic Products, is an important technical reference standard for RoHS testing, and specifies the sampling and testing methods of different harmful substances. 3. EN 50581:2012, The Compliance Assessment of Hazardous Substances Limit in Electrical and Electronic Products, is an important basis document to judge whether the product meets the RoHS directive. 4. IPC-1752A: The standard specifies the labeling requirements of the RoHS certified products, including the location and size of the RoHS marks on the product and the labeling content of the components. www.uni-lab.hk/

RoHS , short for Restriction of Hazardous Substances ,   is a certification for limiting the use of certain harmful substances in electrical and electronic products. The main purpose of RoHS certification: is to limit the use of 10 harmful substances of lead, mercury, cadmium, hexavalent chromium, PBDE and PBBs, tetra-brominated diphenyl ether, polychlorinated biphenyl, short chain chlorofaffin, tributybutyl tin composition in electrical and electronic products, in order to reduce the harm of these substances to human health and the environment. Test method and equipment of RoHS: 1. ICP-OES Induction-coupled plasma emission spectroscopy, which is the most commonly used method in RoHS detection, is mainly used for the detection of lead, chromium, cadmium and other metal elements. The principle is to atomize the sample solution and produce plasma, for qualitative and quantitative analysis through the elemental characteristic emission spectra. 2. ICP-MS Induction-coupled plasma mass s...

Suitable for external lighting, signal devices and automotive lamp shell protection, can provide realistic analog electronic products and their components during the transportation and use of the spray test may be subjected to water and other environment, to detect the waterproof performance of various products. Common operation mode 1.Preparation: First, select a test device that can simulate the real rainfall conditions. A spraying system or spray device can be used to ensure a uniform and continuous flow of rainwater. 2.Sample preparation: Cut the material to be tested into the appropriate size, usually square or rectangular. Ensure that the edges of the sample are flat, with no obvious defects. 3.Install the samples: attach the sample to the device to ensure full level and withstand rain. 4.Adjust test parameters: adjust the operating parameters of the shower, such as flow and spray Angle. 5. Experimental: turn on the shower and start the experiment. Usually the experiment lasts fo...

  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.

  -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

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

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/

  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:

  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 requireme...

Intelligent lock is a kind of lock integrating electronic technology, mechanical technology and network technology. Compared with the traditional mechanical lock, it has been improved in security, convenience and intelligence. Intelligent   lock in the process of continuous development, its networking way is also constantly changing.   At present, the common networking ways of smart locks on the market mainly include: Wi-Fi, Bluetooth, Zigbee, NB-IOT, etc. Intelligent   door lock needs to be RF tested in a professional wireless laboratory, our laboratory has passed the CNAS and A2LA recognition, can do the EU CE-RED, American FCC-ID, Canada I C -ID and Japan TELEC certification.