Shenzhen United Testing Technology Co., Ltd

  The Amazon CPC certificate is a certification document indicating that children's products sold in the US market must comply with the requirements of the US Consumer Goods Safety Improvement Act (CPSIA) and should be provided by the manufacturer or importer. The CPC certificate proves that the product has passed the necessary tests and complies with all applicable child product safety rules. The CPC certificate test items usually include: Physical and mechanical testing Flammability test chemical test Labbel and warning language tests Electrical safety test Radiation test The CPC certificate must contain details of the product, test results, applicable regulations and standards, and contact information for the manufacturer or importer. If the product does not have a CPC certificate or the certificate does not meet the requirements, Amazon may prohibit the product from being sold on its platform. www.uni-lab.hk/ hofferlau@uni-lab.hk

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/

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...

The vibration test methods can be divided into sinusoidal vibration and random vibration: Sinusoidal vibration is often used in the laboratory test method, to simulate rotation, pulsation, shock (in ships, aircraft, vehicle, space aircraft) on the vibration and the resonance frequency analysis of product structure and little note to pick up card is given priority to, it is divided into two kinds of sweep vibration and fixed frequency vibration, the harsh degree depends on the frequency range, loss amplitude, test duration. Random vibration is assessed as the seismic resistance strength of the overall structure of the fire module product and the delivery environment in the packaging state, and its severity depends on the frequency range, GRMS, test duration and axial direction.

1. Electromagnetic compatibility (EMC): harassment power, radiation harassment, terminal harassment voltage, electrostatic discharge immunity, electromagnetic radiation immunity, conduction immunity, etc. 2, low voltage part (LVD): harmonic current, voltage fluctuation and flicker, current intensity, instantaneous voltage, etc.

The purpose of low temperature test is to test whether the product can be stored and controlled in a long-term low temperature environment, which is to determine the adaptability and durability of military and civilian equipment for storage and work at low temperature conditions. Physicochemical properties of materials at low temperature. The standard has specification requirements for pre-test treatment, initial test test, sample installation, intermediate test, post-test treatment, heating speed, load condition of the temperature cabinet, and volume ratio of the measured object to the temperature cabinet. Failure mode of specimen under low temperature condition: the parts and materials used in the product may be cracked, embrittlement, movable part stuck, and characteristic change at low temperature.

  The immersion pressure test box is a special equipment used to simulate the underwater environment. It can detect the waterproof performance of all kinds of electronic products according to different IP grades and waterproof standards. The purpose is to verify whether the product can work properly and remain safe and reliable when it encounters a wet environment such as rain, rivers and oceans. T est requirements Test water temperature: according to the actual use environment of the product, choose the corresponding water temperature, generally at room temperature or slightly higher than room temperature. Test time: determine the immersion time according to the waterproof grade requirements stipulated in the relevant standards. Generally ranges from 30 minutes to 2 hours. Test content: immerse the tested product completely in water to ensure that all openings and gaps are covered by water. At the same time, it is necessary to simulate the immersion scene that the product may enco...

  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/

  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...