BS EN IEC 60068-2-85:2019

What is BS EN IEC 60068‑2‑85 - Long-time history replication about?   

BS EN IEC 60068‑2‑85 demonstrates the adequacy of specimens to resist dynamic loads without unacceptable degradation of their functional and/or structural integrity when subjected to the specified vibration test requirements as defined by a time history (long time history replication). 

A long-time history test is mainly used for a durability and functionality test using an actual time history measured in a real field environment. It can also be used as a method to apply a simulated non-gaussian time history. 

BS EN IEC 60068‑2‑85 is applicable to specimens that can be subjected to the vibration of a very specific nature resulting from transportation or operational environments, for example in aircraft, space vehicles, and land vehicles. It is primarily intended for unpackaged specimens, and for items in their transportation container when the latter can be considered as part of the specimen itself. 

BS EN IEC 60068‑2‑85 is applicable for single-axis excitation. 

Who is BS EN IEC 60068‑2‑85 - Long-time history replication for?  

 BS EN IEC 60068‑2‑85- Long-time history replication is useful for:  

• Vibration equipment manufacturers 
• Quality analysts 

Why should you use BS EN IEC 60068‑2‑8 - Long-time history replication?   

BS EN IEC 60068‑2‑85 deals with long-time history replication vibration testing intended for general application to components, equipment, and other products, that may be subjected to vibrations of an arbitrary nature not covered by the other existing methods for vibration testing. The methods and techniques in BS EN IEC 60068‑2‑85 are based on digital control of vibration in the time domain which allows a more flexible definition of the vibration input signal to suit individual cases that are specified in the relevant specification.  

The test method in BS EN IEC 60068‑2‑85 is based primarily on the use of an electrodynamic or a servo-hydraulic vibration generator with an associated computer-based control system used as a vibration testing system. 

Long-time history replication vibration testing described in BS EN IEC 60068‑2‑85  is used to identify accumulated stress effects and the resulting mechanical weakness and degradation in the specified performance.