Ningbo Qiaopu Electric Co., Ltd. power line quality test methods

A full inspection: Ningbo Qiaopu Electric Co., Ltd. All submission approved power cord or materials to inspection without missing the test. Apply in the following circumstances:
(1) volume is small, simple and lower cost of test;
② power cord must be qualified;
If a small amount of unqualified ③ power cord, the product may cause a fatal impact.
Sampling inspection: Ningbo Qiaopu Electric Co., Ltd. all individuals from a number of power lines to extract part of the individual to be tested, according to the test results of the samples to determine the eligibility of activities of the entire batch of the power cord, is a typical statistical inference job.
(1) applies to the following situations: a. Need for destructive testing of the product performance testing;
b. too much bulk, and not be able to carry out a full inspection;
c. need a longer test time and higher costs of inspection;
d allows a certain degree of undesirable chemicals.
The ② sampling terms:
a. inspection lot: the same power cord together as a testing object; Generally, a production batch shall be a inspection lot. A production batch is divided into a number of inspection lot, but an inspection lot can not contain more than one production batch, and can not be freely combined inspection lot.
b. bulk: Ningbo Qiaopu Electrical Appliance Co., Ltd. approved the number of units contained;
c. sampling: the number of products extracted from the batch;
failed to determine the number (Re): Refused an abbreviation that rejection;
e the acceptance number (Ac): Accept abbreviations that receives;
f acceptable quality level (AQL): Acceptable Quality Level of abbreviations. More simply that the the nonconforming rate power cord received.
Sampling program to determine: Ningbo Qiaopu Electric Limited sampling program is designed in accordance with the national standard GB2828 "Batch Inspection count sampling procedures and sampling table". The specific application of the following steps:
① Criteria for determining the quality of the power cord:
② select the check level: general inspection horizontal Ⅰ, Ⅱ, Ⅲ; the special inspection horizontal S-1, S-2, S-3, S-4, under normal circumstances, the general level II.
(3) the selection of qualified power line quality level (AQL): AQL is the main basis for selecting the sampling plan, should be mutually agreed by the production and consumers.
The ④ determine sample size code, ie the sampling number.
⑤ Select the type of sampling program: as a normal sampling plan, tightened sampling plan, or multiple sampling program.
⑥ look-up table to determine the acceptance number (AC) and the failure to determine the number (Re).