BS EN 61340-4-7:2017

What is BS EN 61340‑4‑7‒ Test methods for ionization about?  

BS EN 61340‑4‑7 is a part of an international standard that covers the subject of electrostatics. 

BS EN 61340‑4‑7 provides test methods and procedures for evaluating and selecting air ionization equipment and systems (ionizers). It addresses four practical methods of air ionization: 

• Radioactive emission 
• High-voltage corona from AC electric fields 
• High-voltage corona from DC electric fields 
• Soft X-ray emission 

BS EN 61340‑4‑7 establishes measurement techniques, under specified conditions, to determine offset voltage (ion balance) and decay (charge neutralization) time for ionizers.  

Note: BS EN 61340‑4‑7 does not include measurements of electromagnetic interference (EMI), or the use of ionizers in connection with ordnance, flammables, explosive items, or electrically initiated explosive devices. 

Who is BS EN 61340‑4‑7‒ Test methods for ionization for? 

BS EN 61340‑4‑7 on test methods for ionization is useful for: 

• Manufactures of ionizers 
• Suppliers, dealers, and importers of ionizers 
• Installers and service providers for ionizers 

Why should you use BS EN 61340‑4‑7‒ Test methods for ionization?  

Grounding is the primary method used to limit static charge, but they are not effective in removing static charges from the surfaces of non-conductive or isolated conductive materials. Hence, air ionization techniques, by means of ionizer systems, are utilized to reduce this charge.  

BS EN 61340‑4‑7 provides test methods and procedures that can be used while evaluating ionization equipment. It gives the test methods that help you, generate meaningful, reproducible data.  

BS EN 61340‑4‑7 covers the required test methods different for the wide variety of ionizers, and the environments within which they are used. Users of BS EN 61340‑4‑7 could easily adapt the test methods as required to produce meaningful data in their own application of ionizers and to provide performance data describing their products. 

What’s changed since the last update?  

BS EN 61340‑4‑7:2017 supersedes BS EN 61340‑4‑7:2010, which is withdrawn. BS EN 61340‑4‑7:2017 includes the use of contacting plate voltage measurements in addition to the previous non-contacting plate voltage measurements, as compared to the previous edition.