ANSI-ESD STM 3.1:2000 pdf download. Protection of Electrostatic Discharge Susceptible Items-Ionization.
ANSI-ESD STM 3.1 establishes measurement techniques, under specified conditions, to determine ion balance and charge neutralization time for ionizers. This standard test method does not include measurements of electromagnettc interference (EMI), or uses of ionizers in connection with ordnance, flammables, explosive items or electrically initiated explosive devices.
1.2 Purpose
This standard test method provides test methods and procedures for evaluating and selecting air ionization equipment and systems (ionizers).
1.3 Application
As contained in this standard test method, the test methods and test conditions may be used by manufacturers of ionizers to provide performance data describing their products. Users of ionizers are urged to modify the test methods and test conditions for their specific application in order to qualify ionizers for use, or to make periodic verifications of ionizer performance. The user will need to decide the extent of the data required for each application.
2 Normative references
The following documents contain provisions that, through reference in this text, constitute provisions of this ESD Association Standard Test Method. All documents are subject to revision, and parties to agreements based on this ESD Association Standard Test Method are encouraged to investigate the possibility of applying the most recent editions of the documents listed below.
The references listed below are not meant to be inclusive of all that might be applicable to the operation of ionizers. There may be additional local, state, national and internationat documents that are relevant. Users of this standard test method are encouraged to determine if other regulations and references apply.
3 Definitions
The following definitions apply for the purposes of this document in addition to those specified in ESD ADV-1.O — Glossary.
air conductivity: The ability of air to conduct (pass) an electric current under the influence of an electric field.
air ions: Molecular clusters of about 10 molecules (water, impurities, etc.) bound by polarization forces to a singly charged oxygen or nitrogen molecule.
charge decay: The decrease and/or neutralization of a net electrostatic charge.
charge induction: The redistribution of charge in an isolated conductor when placed in an electric field (for example, from a charged body).
Note: Momentary grounding of such a conductor would result in its gaining a net charge.
charged plate monitor (CPM): An instrument used to measure the charge neutralization properties of ionization equipment.
compressed gas Ionizer: Ionization devices that can be used to neutralize charged surfaces and/or remove surface particles with pressurized gas. This type of ionizer may be used to ionize the gas within production equipment.
corona: The production of positive and negative ions by a very localized high electric field. The field is normally established by applying a high voltage to a conductor in the shape of a sharp point or wire.ANSI-ESD STM 3.1 pdf download.