What does reliability testing mean? What are the specified quality inspection standards?

Date：2021-08-20 11:26:00Views：2268

Reliability test is a means to investigate, analyze and evaluate the reliability of products. The test results provide a basis for fault analysis, research and answer, study the corrective measures taken, and judge whether the product meets the index requirements. According to the method and purpose of reliability statistical test, reliability statistical test can be divided into reliability verification test and reliability measurement test. Reliability measurement test is a test for measuring reliability characteristics or their values, which is usually used to provide reliability data. Reliability verification test is used to verify whether the reliability characteristic value of equipment meets the specified reliability requirements. Generally, reliability identification and acceptance test are collectively referred to as reliability verification test.

Introduction to reliability test background

The test to measure, verify or improve product reliability is called reliability test. It is an important link of product reliability.

Generally, the purpose of reliability test for products is as follows:

(1) In the development stage, make the product reach the predetermined reliability index.

In order to make the product reach the predetermined reliability index, it is necessary to carry out reliability test on the samples in the development stage, so as to find out the problems existing in the raw materials, structure, process and environmental adaptability of the product and improve them. After repeated test and improvement, the reliability indexes of the product can be continuously improved to meet the predetermined requirements.

(2) Conduct reliability appraisal during product development and finalization.

During the development and finalization of new products, identification tests shall be carried out according to product standards (or product technical conditions), so as to comprehensively assess whether the products meet the specified reliability indicators.

(3) Control the quality of products in the production process.

In order to produce products stably, it is sometimes necessary to conduct reliability test for each product according to the items specified in the product technical conditions. In addition, reliability sampling test shall be carried out batch by batch or within a certain period. The stability of product quality can be understood through the reliability test of products. If the product quality drops due to poor quality of raw materials or out of control of process flow, it can be reflected in the product reliability test, so that corrective measures can be taken in time to restore the product quality to normal.

(4) Screen the products to improve the reliability of the whole batch of products.

Reasonable screening can eliminate the early failure products caused by various reasons (such as defective raw materials, improper process measures, negligence of operators, failure of production equipment and lax quality inspection, etc.), so as to improve the reliability level of the whole batch of products.

(5) Study the failure mechanism of the product.

Through the product reliability test (including simulation test and field use test), we can understand the failure mode and failure law of the product under different environments and different stress conditions. Through the analysis of failed products, the internal causes (i.e. failure mechanism) and weak links of products can be found out, so that corresponding measures can be taken to improve the reliability level of products.

Climate and environment detection:

Test items	Reference standard	Capability range
Low temperature test	GB/T 2423.1-2008; IEC 60068-2-1: 2007EN 60068-2-1: 2007	-40℃，1m × 1m × 1m
High temperature test	GB/T 2423.2-2008; IEC 60068-2-2: 2007EN 60068-2-2: 2007	+150℃，0.5m3
Constant damp heat test	GB/T 2423.3-2016; IEC 60068-2-78: 2012EN 60068-2-78: 2013	Temperature range: - 40 ℃ ~ 150 ℃, humidity range: 20% RH ~ 98% RH; 1m × 1m × 1m
Alternating damp heat test	GB/T 2423.4-2008; IEC 60068-2-30: 2005EN 60068-2-30: 2005GB/T 2423.34-2012; IEC 60068-2-38: 2009EN 60068-2-38: 2009	Temperature range: - 40 ℃ ~ 150 ℃; Humidity range: 20% RH ~ 98% RH; 1m × 1m × 1m
Salt spray test	GB/T 2423.17-2008; IEC 60068-2-11:1981EN 60068-2-11:1999	Equipment capacity: 90L
IP grade (waterproof and dustproof test)	GB/T 4208-2017IEC 60529-1989+Amd 1-1999+Amd 2-2013+Cor 2-	IPX1~IPX8; IP1X~IP6X

Mechanical inspection:

Test items	Reference standard	Capability range
vibration test	GB/T 2423.10-2008; IEC 60068-2-6: 2007EN 60068-2-6: 2008; GB/T 2423.56-2006IEC 60068-2-64: 2008; EN 60068-2-64: 2008	Maximum thrust: 3kn; Maximum acceleration: 1000m / S2, frequency range: 5Hz ~ 2000Hz; Maximum displacement: 25mm maximum load of table top: 120kg
Mechanical impact test	GB/T 2423.5-1995; IEC 60068-2-27: 2008EN 60068-2-27: 2009	Half sine wave; Impact acceleration range: 150 ~ 15000m / S2 pulse duration: 0.5 ~ 18ms; Maximum load of worktable: 5kg worktable size: 200 × 200mm
Drop test	GB/T 2423.8-1995; IEC 60068-2-31: 2008EN 60068-2-31: 2008	Drop height: 30 ~ 150cm; Maximum load of table: 70kg
IK test (degree of protection of enclosure against external mechanical collision)	GB/T 20138-2006; IEC 62262: 2002EN 62262: 2002	Impact energy: 5J, 10J, 20j

Combustion detection:

Test items	Reference standard
Glow wire test	GB/T 5169.10-2006; GB/T 5169.11-2006; GB/T 5169.12-2013; GB/T 5169.13-2006IEC 60695-2-10:2013; IEC 60695-2-11:2014IEC 60695-2-12:2010+A1: 2014; IEC 60695-2-13:2010+A1: 2014EN 60695-2-10:2013; EN 60695-2-11:2014EN 60695-2-12:2010+A1: 2014; EN 60695-2-13:2010+A1: 2013
Needle flame test	GB/T 5169.5-2008; GB/T 5169.16-2008; GB/T 5169.17-2008IEC 60695-11-5:2016; IEC 60695-11-10: 2013; IEC 60695-11-20: 2015EN 60695-11-5: 2017; EN 60695-11-10:2013; EN 60695-11-20:2015
Leakage trace test	GB/T 4207-2012; IEC 60112:2003+A1: 2009; EN 60112:2003+A1: 2009
Horizontal combustion test	UL94; GB/T 2408-2008
Vertical combustion test	UL94; GB/T 2408-2008

Conclusion: the reliability test covers a wide range, which is simply the environmental reliability and fatigue durability test. Including climate, temperature, humidity, drop, salt spray, impact, etc. it depends on what situation and what parts. Chuangxin testing always adheres to the purpose of "professional, authoritative, efficient and innovative". It has invested heavily in purchasing international advanced testing equipment. The testing is in strict accordance with international testing standards and methods. It has obtained CNAs certification and international mutual recognition qualification. Its customer base covers many countries and regions at home and abroad. It is a professional IC testing institution with excellent quality and high popularity in China. If you have any requirements related to component inspection and testing, please call Chuangxin testing, and we will serve you wholeheartedly!