Technical information © DPV Elektronik-Service GmbH 2023 | www.dpv-elektronik.de 652 ESD control element Product qualificationa Verification of the observanceb Test method Thresholdsc Based on test method Thresholdsc Work surfaces, storage racks and transport trolleysg IEC 61340-2-3 Rgp < 1 x 109 Ω Rp-p < 1 x 109 Ω IEC 61340-2-3 Rg < 1 x 109 Ω Connection point of the wrist strap Rg < 5 x 106 Ω Floor covering IEC 61340-4-1d,e R gp < 1 x 109 Ω IEC 61340-4-1 R g < 1 x 109 Ω Ionization IEC 61340-4-7 Decay (1000 V to 100 V and -1000 V to -100 V) < 20 s or offset voltage defined by user < ± 35 V IEC 61340-4-7 Decay (1000 V to 100 V and -1000 V to -100 V) < 20 s or offset voltage defined by user < ± 35 V Seats IEC 61340-2-3 (Measurement of the resistance to potential grounding point) Rgp < 1 x 109 Ω IEC 61340-2-3 (Measurement of the resistance against ground) Rp-p < 1 x 1011 Ω or threshold defined by user EPA clothing IEC 61340-4-9 or threshold defined by user Rp-p < 1 x 1011 Ω or threshold defined by user IEC 61340-4-9 or method defined by user Rp-p < 1 x 1011 Ω or threshold defined by user EPA clothing with grounding properties IEC 61340-4-9 Rgp < 1 x 109 Ω IEC 61340-4-9 R gp < 1 x 109 Ω EPA requirements according to DIN EN 61340-5-1 EPA requirements for personnel grounding according to DIN EN 61340-5-1 a For the product qualification the environmental conditions for the verification should be (12 ± 3) % relative humidity and (23 ± 2) °C. If not defined in the indicated IEC standards, the minimum period for the conditioning to the ambient temperature for the product qualification should be 48 h. b 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. c Symbols used in this chart: Rg refers to the resistance to ground, Rp-p refers to the resistance to the potential grounding point Rp-p refers to the point-to-point resistance d The maximum permissible test voltage for the measuring of ESD floorings which should be used for an ESD program complying with this standard is 100 V. e If a flooring is used to ground the personnel handling ESDS, reference is made to the system requirements according to chart 2. f In situations where damage caused by the Charged Device Model (CMD) has to be taken into account a lower threshold of the point-to-point resistance Rp-p von 1 x 104 Ω is recommended. g Work surfaces are defined as any surface where an ESD-sensitive component is placed down. Technical requirements ESD control element Product qualificationa Verification of the observance Test method Thresholdsb Based on test method Thresholdsb Personnel grounding Wrist straps (straps and grounding cable IEC 61340-4-6 R < 5 x 106 Ω or threshold defined by user See wrist strap system Resistance of the wrist strap IEC 61340-4-6 Inside ≤ 1 x 108 Ω Not applicable Outside > 1 x 107 Ω Not applicable Wrist strap systema Not applicable IEC 61340-4-6 Testing according to electrical contact resistance of the wrist strap R < 3,5 x 107Ω Footwear IEC 61340-4-3c R ≤ 1 x 108 Ω See System person/footwear System person / footwear / floor IEC 61340-4-5 Rg < 1 x 109 Ω and absolute value of the body voltage < 100 V (average of the 5 highest peaks) IEC 61340-4-5 Rg < 1,0 x 109 Ωd,f System person / footwear Not applicable See annex Rgp < 1,0 x 108Ω a 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 107 Ω b 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. c For the product qualification of footwear according to IEC 61340-4-3 the environmental conditions for the verification should be (12 ± 3) % relative humidity and (23 ± 2) °C. d A periodic test of the generated body voltage should be made to verify that the voltage is < 100 V. e The resistance threshold applies to successive measurements of each individual foot, not both feet at the same time. f 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.
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