USB Cable Quality Control

Views：1111time Date：2015-05-26

 Data cable Inspection Standard
1、 Purpose
This standard is the data cable quality acceptance criterion, to ensure the data cable design and produce meet the quality requirements, make sure product quality, provide the judgment standard for the inspection;
2、 Scope
The standard will be applied to data cable’s quality evaluation and sampling inspection for all USB Cable products ;
3、Referred files
Mobile phone reliability test standard
handset appearance inspection standard
4、Equipment
Vernier Caliper, Hardness Meter, Projective Tester, Vibration Tester, Tension Meter, Pressure Meter, Torque Meter, Salt Tester, Swing Tester, Free Fall Tester, Insertion and Draw Tester, Temperature Chamber.

5、 Requirement
5.1 Working condition
Working temperature range ：-20℃～65℃
Humidity：5%～90%
Atmospheric pressure：70 KPa～106 KPa
   Store Temperature: -40℃～70℃
5.2 Appearance requirement
The data cable appearance should be good, no obvious nick, deformed, no plating peel off, no rusty metal and other damage. Plastic part should not be bubbly, broken, deformed and other damage. The spring snaps should be installed correctly. The connection between data cable and mobile phone should be convenient, and should not be loose; the connector shoulder should be insert molding. 
5.3 Dimension
     Length:100cm(Min)， Refer to following picture：
 

  

Reference USB Plug connector：

  

 
10pin USB Plug reference drawing：

  

 
5pin USB Plug reference drawing：

  

 
10pin USB Socket reference drawing：

  

 
5pin USB Socket reference drawing：

 

5.4 Cable Material and Configuration 
Main Spec：Φ3.5*1000mm;
Color：Black/White；
Core Wire：26AWG(7/Φ0.12BC)4C;
Cable Configuration：

 
5.5 Electrical Characters：
 Rated working voltage：1~30V
 Insulation Impedance of Wire：DC/300V 10MΩ MIN
 Contact Impedance：0.2Ω/m MAX
 Conductive Impedance：2Ω MAX
 Rated Max Voltage：AC 500V
6.Reliability：
6.1 Free fall drop test
Test equipment：20mm        20mm floor slab
Test Circumstance：
1）Height :150cm；
2）Drop 10times。
 Criteria：
1）Electrical function is good, and the plastic should not be broken。
6.2  Tensile strength test
 Test equipment： Tension meter；
 Test Requirement：
1）Tension under 5KG strength on the two ends of the data cable；
2）Retain 60 seconds。
Criteria：
1）The function should be good, and the damage happened on core wire should not be over 20%, cable skin should not be cracked ,deformed and broken down；
6.3   Plug insertion and pull out test
Test condition：
1）Plug insertion and pull out machine；
 2）Test cycle: 3000 times ,  speed: 40time/minute;
      Test requirement: after 2000 times, check it per 500time;
 Criteria：
1） No soldering issue, No damage on the plug and metal holder, the electrical function is ok
2） The connection between plug and socket should not be loose, and this strength can support the weight of handset;
6.10  Swing test
  Test Condition：
1） Hang 200g object on the data cable, sway all angle 60 degree, cycle 3000times, 20times/minute
 Criteria：
All function should be ok, no mechanical damages or other appearance failure; the connection strength between data cable and handset should not be loose.