Shenzhen United Testing Technology Co., Ltd

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...

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.