If testing can demonstrate that operator’s resistance path is reliable, it might be OK, but it is certainly not best practice. Alligator clip attached to dissipative mat is not recommended per ESD Handbook ESD TR20.20 wrist strap section 5.3.2.2.2 Wrist Strap Ground Cord: “The groundable end of the cord is most often equipped with a…
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ANSI/ESD S20.20 doesn’t mention hair, but the ESD Handbook ESD TR20.20 does. The general rule from ANSI/ESD S20.20 is in section 8.3. From ESD Handbook ESD TR20.20 mentions “human hair” is near the extreme end of the Triboelectric Series, so it can be high charging. But the above rule would apply; keep hair 12” away…
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Regular cleaning of an ionizer’s emitter pins is necessary to stay within the ionizer’s required limits of ANSI/ESD S20.20. If the ionizer has a filter, it should be cleaned at this time as well. One S20.20 required limit for ionizers is Offset Voltage of less than + or – 50 volts (this is often referred…
Written by: Gene Felder, Corporate Product Manager What is the ESD control requirements for battery and pneumatic powered hand tools? From ESD Handbook ESD TR20.20 section 5.5.2.2 “Battery powered and pneumatic hand tools while being held should have a resistance to ground of less than 1 x 10E12 ohms.” If tool’s housing is conductive or…
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There is a 133 page handbook for implementing ANSI/ESD S20.02; it is ESD TR20.20. Here’s what it says about equipotential grounding and field service kits. Included in section 5.1.3: “When neither AC equipment or auxiliary grounds are available, an equipotential bonding system may need to be used. In this situation, all of the items in…