ESD-Kontrollprogramm - Produkte schnell finden! www.dpv-elektronik.eu z.B.: dpvlink 21010 dpvlink 3 Technical information © DPV Elektronik-Service GmbH 2023 | www.dpv-elektronik.de 655 The measures for the ESD protection are defined in the ESD control program. Every company has different processes and will therefore need a different mixture of individual protective measures for an optimal ESD control program. It is essential to choose these measures depending on the technical requirements and to document them accurately in a ESD control program plan so that all persons concerned know the program requirements. Requirements for an ESD control program: The organisation has to create, document, introduce and maintain the program in accordance with the standard DIN EN 61340-5-1 and to verify its compliance. EPA requirements ESD Coordinator The organization must appoint one person having to fulfill the responsibility of this requirement. On this occasion the following aspects must be respected: Verification of the observancef ESD control element Thresholdsb Based on test method Rg < 1 x 109 Ω IEC 61340-2-3 Work surfaces, storage racks and transport trolleysg Rg < 5 x 106 Ω Connection point of the wrist strap Rg< 1 x 109Ω IEC 61340-4-1 Floor covering IEC 61340-4-7 Ionization • The appointment is made by the management • The ESD coordinator is responsible for the implementation of all measures • Necessary ESD protective measures are to be determined in appropriate work instructions • The implementation in every single area must be controlled • The necessary comprehension is a precondition • An internal auditing must be arranged and supervised • The properties of newly purchased ESD materials have to be verified and possi- Decay (1000 V to 100 V and -1000 V to -100 V) < 20 s or offset voltage defined by user < ± 35 V bly determined ESD control program plan: The organization must prepare an ESD control program plan that addresses all the following requirements to the program. These requirements concern: Rg < 1 x 109 Ω IEC 61340-2-3 (measurement of the resistance against ground) Seats Rp-p < 1 x 1011 Ω or threshold defined by user IEC 61340-4-9 or method defined by user EPA clothing Rgp < 1 x 109 Ω IEC 61340-4-9 EPA clothing with grounding properties Requirements for personnel grounding • training • product qualification • verification of the observance • grounding/connection systems • personnel grounding • EPA requirements • packaging systems • labelling Verification of the observance ESD control element Technical requirements Thresholdsb Test method The plan is the basic document for the introduction and verification of the ESD control porgamm. The objective is a completely introduced and integrated program fulfulling the requirements of the internal quality system. The plan must apply for all aspects of the work of the organization. R < 3.5 x 107Ω Wrist strap systema Personnel grounding IEC 61340-4-6 Testing according to electrical contact resistance of the wrist strap Personnel grounding The complete personnel must be grounded according to the requirements below or connected to the potential equalization system if ESDS are handled. Sitting employees in an EPA have to be grounded via wrist straps. When working in standing position the personnel can be grounded via wrist straps or the system floor/footwear. In case a system footwear/floor is used, the personal has to wear ESD shoes on both feet and the following conditions have to be fulfilled: Rg < 1.0 x 109 Ωc,e IEC 61340-4-5 System person / footwear / floor Rgp < 1.0 x 108Ω see annexd System person / footwear Footnote: In situations where EPA clothing (according to IEC 61340-4-9) is used as part of the wrist strap grounding path, the resistance of the entire system including person, protective clothing and grounding cable should be < 3.5 x 107Ω. a) • The total resistance of the system (from the person via footwear and floor to the device ground) is less than 1.0 x 109 Ohm • The maximal generated body voltage is < 100 V Symbols used in this chart: Rg refers to the resistance to ground, Rgp refers to the resistance to the potential grounding point, Rp-p refers to the point-to-point resistance. b) ESD protected area (EPA) A periodic test of the generated body voltage should be made to verify that the voltage is < 100 V. c) The handling of ESDS without covering or packaging protecting from ESD has to take place in an EPA. The boundaries of the EPA have to be indicated clearly as boundaries (e.g. warning signs indicating the existence of the EPA have to be put up and have to be clearly visible for the employees before entering the EPA). Note An EPA may be a building, a whole room or an individual workstation. The access to the EPA must be limited to the personnel having completed an appropriate ESD training. Untrained individuals have to be accompanied by trained employees while being in an EPA. The resistance threshold applies to successive measurements of each individual foot, not both feet at the same time. d) The required threshold of < 1.0 x 109 Ω is the highest admissible value. Based on the measured resistance values for the product qualification of the system footwear and floor assuring a maximal generated body voltage of 100 V, the user should define an upper threshold and use these resistance values for the verification of the observance. e) The test methods in the column for the verification of the observance only refer to the basic test method. It is not expected that the test methods are completely followed. f) Work surfaces are defined as any surface where an ESD-sensitive component is placed down. g)
RkJQdWJsaXNoZXIy MjU0MA==