135 Каталог HOFFMANN GROUP 2016 Производственная мебель для работы и хранения Вер. 47 Стр.135

Каталог HOFFMANN GROUP 2016 Производственная мебель Стр. 135 0135 ENG Lab2u

Jb Hoffmann Group Protection against ESD: EPA EPA = Electrostatic Protected Area Personnel grounding _ People are the main source cfdectrostatic discharges. Shoes and wristbands with grounding cables are mandatory for employees working in electronic production. Wristband and shoe testers make the daily checking of ERA effectiveness easier. Chain and standing stools should also have ESD protection. Tool _ To ensure safe handling of your devices, you should use ESD-compliant tools. Markings Floor markings identify ESD protected areas. Signs and labels are equally important in signalling potentially at-risk devices and assemblies. Floor The floor should be conductive and meet the required limits of DIN EN 61340-5-1. When deaning ESD floors, only use deaning products that do not create layers so that the conductivity values stay within the desired range, If only individual workstations are set up as EPA, ESD floor mats or tiles can be fitted with grounding, but they must be dearly marked. Storage/Containers Dissipative ESD shelves and containers for transporting and storing devices protect at-risk devices. Roller cabinets should have conductive wheels. A comprehensive EPA zone covers the following areas (minimum requirement according to DIN EN 61340-5-1): Workplace /workstation An ESD protected work place should be ergonomically adaptable. Electrostatic charge Is dissipated via the working area and a grounding cable, so the work place remains charge-neutral. Measurement technology It is essential to regularly test protection devices with measuring equipment. Measurements must always be taken when entering an EPA and regular personnel checks must be performed. Worktables, floor mats and grounding connections should be checked monthly and ESD monitoring instruments should be checked annually. The discharge resistance should have the following values: Work surfaces: between 7.5x10s fl and 109 fi. Floor: less than 109 0 Chair/standing stool: less than 1010 Q Tool: less than 1015 D Resistance measuring tools and electrodes can be found in the Hoffmann Group catalogue “Hand tools and Metrology 135