Shenzhen United Testing Technology Co., Ltd

  1. Sign and instructions; protection of live parts; 2. Start of electric appliances; input power and current; 3. Heating; leakage current and electrical strength at working temperature; 4. Damet resistance; leakage current and electrical strength; 5. Overload protection of transformer and related circuits; abnormal operation; 6. Stability and mechanical hazards; mechanical strength; structure; 7. Internal wiring; power connection and external flexible cord; 8. Terminal terminals for external wires; grounding measures; 9. Screw and connection; electrical clearance, creepage distance and solid insulation; 10. Heat resistance and flame retardant resistance; rust prevention.

  GB / T 13387-2009 Method of silicon and other electronic materials SJ 3195-1989 Test method for the work function of electronic materials SJ 3196-1989 Test method for the secondary electron emission coefficient of electronic materials SJ 3205-1989 Measurement of the evaporation rate of electronic materials T / CSRA 3-2020 electronic material SJ 3234-1989 Dynamic test method for the vacuum vent properties of electronic materials

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.

  AS / NZS 3112 Test Standard: AS/NZS 3112: 2017 The standard specifies the most basic safety requirements for Australian plugs and sockets with a rated ultra-low voltage of 32A for domestic and similar purposes. test item: 1. Terminal and internal connection and pin; 2. Insulation material, no removable plug; 3. Entry mode and wire buckle of the power supply cord; 4. Hand holding parts and internal connection; 5. Rating value and size of the low-voltage plug; 6. Ground connection mode and fuse; 7. Test of logo and plug; 8. Terminal and internal connection, no arrangement mode; 9. socket connecting piece, socket structure; 10. Size and grounding connection mode; 11. Prevent contact with live body and desktop installation socket; 12. Ground socket, socket with switch; 13. Test of outlets, marks and signs, and outlets with protective doors.

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 specific items of the food contact material testing of the juicer are as follows: 1. Stainless steel knife head test items: Total chromium 2. PP material test items: Specific gravity Melting point (only for PP) n-hexane extractives Xylene extractives

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...

CE certification is a mandatory certification of EU products, for all products sold in the EU market. LVD is an instruction under CE certification, which is applicable to use electrical products with AC voltage between 50V to 1500V and DC 75V to 1500V. CE certification in addition to LVD instructions, there are more than 20 other instructions, the use of more EMC instructions, ERP instructions, ROHS instructions and so on. When a product is marked with a CE mark, it indicates that the product has met the relevant instruction requirements.

A lso known as "oven", adopts electric heating method for blast cycle drying test, which is divided into two kinds: blast drying and vacuum drying. Air drying is to blow the hot air through the circulation fan to ensure the temperature balance in the box; vacuum drying is to use vacuum pump to pump the air in the box, the atmospheric pressure is below the atmospheric pressure, so that the product in a very clean state. I t i s a commonly used instrument and equipment, mainly used to dry the sample, and can also provide the temperature environment required for the experiment. Dry box is used in chemical industry, medicine, casting, automobile, food, machinery and other industries. Generally divided into galvanized steel plate and stainless steel liner, pointer and digital display, natural convection and blast cycle, conventional oven and vacuum type.

  The EU CE certification EN55035 detection standard for the Type-C interface data line is mainly EN55032, EN55035 and ROHS .

  Drop testing is usually used to simulate the free drop that a product may suffer during handling, examining the ability of the product to withstand accidental shocks. The drop height is usually based on the weight of the product, and the probability of falling, as a reference standard, and the drop surface should be a smooth, hard, rigid surface made of concrete or steel. For different international specification even if the product under the same weight but the drop height is not the same, for the handheld products (such as mobile phones, MP3, etc.) most drop height between 100cm ~ 150cm, IEC for 2kg handheld products recommendations should meet 100cm drop height is not damaged, MIL is recommended drop height is 122cm, Intel for handheld products (such as mobile phone) recommendations drop height is 150cm. The severity of the test depends on the height, number and direction.

  Electromagnetic compatibility (EMC) testing is a testing process to assess the performance of electronic products in different electromagnetic environments, which is designed to ensure that these devices meet specific electromagnetic interference (EMI) and electromagnetic sensitivity (EMS) standards. During EMC test, EMI test is to check whether the electromagnetic interference generated by the equipment exceeds the standard limit, while EMS test is to assess the tolerance level of the equipment to the electromagnetic interference from the outside.

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 h...

  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 te...

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 ...