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…
Read more Should dissipative hats be worn to protect ESD sensitive items from charges on hair?
Desco offers a wide product offering of Ionizers: bench top, overhead, and point-of use. Desco products incorporate superior technology providing fast discharge times, and such features as auto balancing feedback controls and “clean me” alarms. The primary function of an ionizer is to neutralize electrostatic charges on insulators and isolated (non-grounded) conductors to reduce the…
HUMAN BODY MODEL The updated standard ANSI/ESDA/JEDEC JS-001-2011, For Electrostatic Discharge Sensitivity Testing Human Body Model (HBM) – Component Level Table 3 has divided the Class 0 classification into two withstand voltage levels with class 0A being less than 125 volt sensitivity, and class 0B being 125 to less than 250 volts. If handling class…
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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19325 (Replaces Item 19225) NEW Improved Banana Jack Creates a consistent connection and helps prevent accidental disconnects with the operator’s wrist strap Single Station Continuous Monitor for Operator, ESD Work Surface, and Electrical Ground Continuously monitors the integrity of operator’s electrical ground as well as one operator and ESD workstation, eliminating the need for periodic…
“Any auxiliary grounds (water pipe, building frame, ground stake) present and used at the workstation must be bonded to the equipment ground.” A low resistance connector (such as metal wire) should be soldered or mechanically attached electrically connecting the building electrical system AC ground (Equipment Ground) to the Auxiliary Ground. ESD Handbook TR20.20 section 5.1.3…
Read more What is the proper procedure for connecting the ESD ground to the building ground?
Does it matter where a person should wear the wrist strap? Desco is happy to share our knowledge of ESD control through our Answer’s Database. We have 5 NARTE Certified ESD Technicians, we are a member of the ESD Association, and we have 30+ years of manufacturing products for ESD control. See the following question…
Read more Can anyone wear their wrist strap on their leg instead of their wrist?