Tws

Test item Test method and criterion Test result description Test result
High and low temperature test
According to the national standard GB/T 31241-2014, test method:
1) The samples were placed in the laboratory at a temperature of 75 ° C ±2 ° C for 6h;
2) After that, the temperature of the test chamber was reduced to -25ºC±2ºC and kept for 6h, and the temperature conversion time was not more than 30min;
3) the experimental temperature was increased to 75 ° c ±2 ° c again, and the temperature conversion time was not more than 30min;
4) Repeat steps 1) --3) for a total of 4 cycles.
2. Judgment criteria: The appearance and function of the product should be normal. 1
2. Charging function: normal charging, normal use function of headphones OK
Micro - USB socket
Insertion and removal force and life
According to YD/T 1591 -- 2009 experimental methods:
1) When the rate is less than 12.5mm/min, the insertion force is less than 35N, and the pulling force is more than 8N;
2) Insertion and removal cycle life 10000 times, 200 times /H
Determination criteria:
1) At the end of the test cycle, pulling output ≥8N;
2) After the completion of the test, the mechanical structure of the product is not damaged, and the function is normal. 1. The average value of the first five times of inserting and removing force: the insertion force value is 18.2N, and the pulling force value is 19.1N, which meets the requirements.

2. After 10000 times of test, the average value of 5 times of inserting and pulling force is taken: the pulling force value is 9.1N. The appearance and function are normal and meet the requirements. OK
Alcohol wear-resisting concentration > 95% alcohol, 500g weight, cotton pad wrapped at the bottom (about 2mm thick), rub 100 times within 10cm distance of the alcohol drop surface, and rub once about 5cm/s
(1)UV, electroplating, PU paint: 250 times
(2) Elastic paint: 100 times
(3) The results of 100 times of silk screen printing 2: there is no abnormal product surface, adhesion ≥4B is qualified: the oil film on the surface of the product has fallen off, discoloration, cracks, wrinkles, and separation as abnormal. OK
Salt spray test test method:
1) (5±1) % Nacl solution,PH value (6.5-7.2) 2) test temperature was 35ºC±2ºC, pressure barrel temperature 47ºC±1ºC3) relative humidity was at least 85%, spray time 24H 4) spray volume between 1 and 2ml/80cm2. H 5) atmospheric pressure was (1±0.01) KGF /cm²
Determination criteria:
At the end of the test, the small sample should be rinsed under tap water for 5min, then rinsed with distilled water or deionized water, and then shaken or dried with air flow to remove water droplets. The temperature of the cleaning water should not exceed 35ºC, and the sample should be placed under standard recovery conditions for no less than 1h and no more than 2h. Then check the appearance of the product, the metal part of the product should not be obvious and inerasable rust, the product can work normally. 1, structure, appearance: metal parts without obvious corrosion.
2. Function: Start up normally and connect Bluetooth. OK
Drop test method:
1) The test height is 120cm
2) The ground is cement or steel plate
3) The number of drops is 3 times at different angles

Requirements after testing the product shell no cracks, the product can work normally no cracks, the product can work normally OK
Waterproof test
IPX4 test method:
Spray water from any Angle, use semi-circular water spraying equipment, sprinkler hole at 0.07 water per minute from the vertical direction to both sides 180 degrees for 10 minutes;

Requirements: After testing, there will be no harmful effect on the product. Product switch machine and other functions are normal; Product switch machine normal OK