ANSI ESD S20.20-2007 - FOIA and eLibrary website! - NASA

ANSI/ESD S20.20-2007Table 3. EPA ESD Control ItemsTechnicalRequirementEPAESD ControlItemWorksurfaceWrist StrapCordWrist StrapCuffProduct Qualification 1Test MethodANSI/ESD S 4.1and/orANSI/ESD STM 4.2ANSI/ESD S1.1ANSI/ESD S1.1RequiredLimit(s) 2< 1 x 10 9 ohmsand/or< 200 volts0.8 x 10 6 to1.2 x 10 6 ohmsInterior< 1 x 10 5 ohmsExterior> 1 x 10 7 ohmsCompliance VerificationTest MethodESD TR53WorksurfaceSectionRequiredLimit(s)< 1 x 10 9 ohmsresistance togroundFor compliance verification of a wriststrap system, see Table 2.Wrist StrapCord BendingLifeANSI/ESD S1.1 > 16,000 cyclesFootwear ANSI/ESD STM9.1 < 1 x 10 9 ohms See Table 2 See Table 2FootGroundersESD SP9.2 < 1 x 10 9 ohms See Table 2 See Table 2Flooring ANSI/ESD S7.1 < 1 x 10 9 ohms See Table 2 See Table 2SeatingIonizationother thanRoom SystemsIonization(RoomSystems)ANSI/ESDSTM 12.1ANSI/ESD STM 3.1- Discharge time- Offset voltageANSI/ESD STM3.1- Discharge time- Offset voltage< 1 x 10 9 ohmsUser defined< ± 50 voltsUser defined< ± 150 voltsShelving ANSI/ESD S4.1 < 1 x 10 9 ohmsMobileEquipment(WorkingSurfaces)ContinuousMonitorsGarmentsANSI/ESD S4.1User definedStatic ControlGarment(ANSI/ESD STM2.1)Groundable StaticControl Garment(ANSI/ESD STM2.1)Groundable StaticControl GarmentSystem(ANSI/ESD STM2.1)< 1 x 10 9 ohmsUser defined< 1 x 10 11 ohms< 1 x 10 9 ohms< 3.5 x 10 7 ohmsESD TR53Seating SectionESD TR53 3- Discharge time- Offset voltageESD TR53 3- Discharge time- Offset voltageESD TR53WorksurfaceSectionESD TR53MobileEquipmentSectionESD TR53ContinuousMonitors SectionESD TR53GarmentsSectionESD TR53GarmentsSectionESD TR53GarmentsSection< 1 x 10 9 ohmsresistance togroundUser defined< ± 50 voltsUser defined< ± 150 volts< 1 x 10 9 ohmsresistance toground< 1 x 10 9 ohmsresistance togroundManufacturerdefined< 1 x 10 11 ohms< 1 x 10 9 ohms< 3.5 x 10 7 ohms1Product qualification is normally conducted during the initial selection of ESD control products and materials. Any of the followingmethods can be used: product specification review, independent laboratory evaluation or internal laboratory evaluation.2For standards that have multiple resistance test methods, these limits apply to all methods.3 For additional information on periodic testing of Ionizers, see ANSI/ESD SP3.3.Copyright 2010 by ESD Association. Licensed, by agreement, for enterpise-wide use to NASA.No other reproduction or transmission in any form is permitted without written permission of the ESDA.For inquiries or to report unauthorized use, contact info@esda.org.6