TECHNICAL BULLETIN TB-2055 Statshield® Smocks Grounding, Testing and Maintenance NO WRISTBAND NECESSARY COIL CORD TO GROUND Figure 1. Desco Statshield® Premium Lab Coat with Conductive Cuffs. Also available in Jacket length. WRISTBAND (NOT INCLUDED) SNAPS TO CONNECT TO GARMENT COIL CORD TO GROUND Figure 2. Desco Statshield® Premium Jacket with Snaps. Also available in Lab Coat length. Description Desco’ Statshield® smocks are designed to be antistatic, low tribocharging, and create a Faraday Cage around the torso and arms of the wearer to protect ESD susceptible items from electrostatic fields generated by clothing on the operator’s clothing. Statshield® Smocks meet the requirement for Groundable Static Control Garment System per ANSI/ESD S20.20-2007’s required limit of < 3.5 X 107 ohm Rtg tested per ANSI/ESD STM2.1. Made in the United States of America Static Control Garment System, Garments that are used to establish the primary ground path for a person shall provide a resistance of less than 35 megohms from the person to the groundable point of the garment.”[ESD TR20.20-2008 section 5.3.13 Garments] Statshield® smocks are constructed of a lightweight dissipative material which made from texturized polyester and a minimum of 9% carbon nylon monofilament. The conductive nylon fibers are woven in a chain-link design throughout the material, providing continuous and consistent charge dissipation. All of the seams in Statshield® smocks are designed to maintain electrical continuity from panel to panel and from sleeve to sleeve in accordance with the ESD Association Garment Standard, ESD-STM2.1. “After verifying that the garment has electrical conductivity through all panels, the garment should be electrically bonded to the grounding system of the wearer so as not to act as a floating conductor.” [ESD TR20.20-2008 section 5.3.13 Garments] The conductive fabric in smock is a conductor. If not grounded, the smock can become an isolated charged conductor. If not grounded via a wrist strap coil cord, ground the ESD garment using ESD footwear to ESD flooring. The dissipative material becomes part of the ground path to remove static charges. Statshield® smocks are available in two lengths -- the lab coat length and the jacket length. Both lengths are available in two styles - with snaps and with conductive elastic cuffs. Smocks are available in eight colors* -- blue, white, teal, burgundy, black, camouflage, pink and grey. Statshield® smocks incorporate a “hip-to-cuff” grounding feature which allows for hands-free grounding with no cord attached to the operator’s wrist. This feature allows connection of a ground cord to a 4mm snap stud on the hip. A seam of carbon-suffused threads provides a secure and direct electrical connection from the snap stud on the hip to conductive elastic cuffs. Statshield® smocks ground the person when used in this manner. Standard touch testing or continuous monitoring can be used to test the “hip-to-cuff” function. *Fabric lots vary slightly in color. “While a person may be grounded using a wrist strap or other grounding methods, that does not mean that insulative clothing fabrics can dissipate a charge to that person’s skin and then to ground. Personnel clothing usually is electrically separate or isolated from the body.” “Groundable DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Web Site: Desco.com TB-2055 July 2013 Page 1 of 4 © 2013 DESCO INDUSTRIES INC. Employee Owned Statshield® smocks are available in the following styles and sizes: LAB COATS WITH SNAPS Blue White X Small 73600 73620 Small 73601 73621 Medium 73602 73622 Large 73603 73623 X Large 73604 73624 2X Large 73605 73625 3X Large 73606 73626 4X Large 73607 73627 5X Large 73608 73628 6X Large 73609 73629 LAB COATS WITH CUFFS Teal Chest Sleeve Blue White 73640 30"-32" 33 3/8" X Small 73610 73630 73641 34"-36" 34" Small 73611 73631 73642 38"-40" 34 3/8" Medium 73612 73632 73643 42"-44" 35" Large 73613 73633 73644 46"-48" 35 1/2" X Large 73614 73634 73645 50"-52" 35 1/2" 2X Large 73615 73635 73646 54"-56" 37 1/2" 3X Large 73616 73636 73647 58"-60" 36 1/2" 4X Large 73617 73637 73648 62"-64" 36" 5X Large 73618 73638 73649 66"-68" 36" 6X Large 73619 73639 JACKETS WITH SNAPS Blue X Small 73699 Small 73700 Medium 73710 Large 73720 X Large 73730 2X Large 73740 3X Large 73741 4X Large 73742 5X Large 73743 6X Large 73744 White 73820 73821 73822 73823 73824 73825 73826 73827 73828 73829 Teal 73840 73841 73842 73843 73844 73845 73846 73847 73848 73849 JACKETS WITH CUFFS Blue X Small 73749 Small 73750 Medium 73755 Large 73760 X Large 73765 2X Large 73770 3X Large 73771 4X Large 73772 5X Large 73773 6X Large 73774 White 73830 73831 73832 73833 73834 73835 73836 73837 73838 73839 Teal Burgundy 73850 73900 73851 73901 73852 73902 73853 73903 73854 73904 73855 73905 73856 73906 73857 73907 73858 73908 73859 73909 Pink 74210 74211 74212 74213 74214 74215 74216 74217 74218 74219 Grey 73890 73891 73892 73893 73894 73895 73896 73897 73898 73899 Black 73860 73861 73862 73863 73864 73865 73866 73867 73868 73869 Teal 73650 73651 73652 73653 73654 73655 73656 73657 73658 73659 Chest Sleeve 30"-32" 33 3/4" 34"-36" 34" 38"-40" 34 3/8" 42"-44" 35" 46"-48" 35 1/2" 50"-52" 35 1/2" 54"-56" 37 1/2" 58"-60" 36 1/2" 62"-64" 36" 66"-68" 36" Chest Sleeve 30"-32" 33 3/8" 34"-36" 34" 38"-40" 34 3/8" 42"-44" 35" 46"-48" 35 1/2" 50"-52" 35 1/2" 54"-56" 37 1/2" 58"-60" 36 1/2" 62"-64" 36" 66"-68" 36" Camo 73870 73871 73872 73873 73874 73875 73876 73877 73878 73879 Pink 74200 74201 74202 74203 74204 74205 74206 74207 74208 74209 Grey 73775 73776 73777 73778 73779 73780 73781 73782 73783 73784 Chest 30"-32" 34"-36" 38"-40" 42"-44" 46"-48" 50"-52" 54"-56" 58"-60" 62"-64" 66"-68" Sleeve 33 3/4" 34" 34 3/8" 35" 35 1/2" 35 1/2" 37 1/2" 36 1/2" 36" 36" Note: Blue, Black, Camo, Grey and Pink Jackets with Cuffs contain a Badge Holder Tab and Two Sleeve Pen Pockets. DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Web Site: Desco.com TB-2055 Page 2 of 4 © 2013 DESCO INDUSTRIES INC. Employee Owned Installation Follow the directions below for proper installation and grounding of the Statshield® smock. YES! NO! YES! NO! Figure 3. Proper installation of smock wearer’s body 1. Put on the smock and fasten all of the snaps on the front of the smock, making sure that clothing is not exposed outside of the smock. 2. Throughout use, it is essential that conductive cuff (or the wristband) be in contact with operator’s skin; the conductive cuff (or the wristband) should never be allowed to be pulled up and over shirt sleeve. 3. Install a coil cord to the snap stud located above the left hand hip pocket. Connect the other end of the coil cord to a verified ground point or continuous monitor. Figure 5. Testing and monitoring of smock and ground cord assembly Grounding Integrity Testing For daily testing or continuous monitoring of the grounding integrity of Statshield® smocks and ground cords, we recommend testing the smock while worn and the use of a standard wrist strap testers or single-wire workstation continuous monitors. Panel-to-panel conductivity is essential so as not to leave portions of the smock as isolated charged conductors. Panel-to-panel conductivity is easy to test using our Surface Resistance Meter Kit Item #19787. Place the two five-pound electrodes on different panels to test. Unless properly grounded, the smocks can hold a charge and become a possible source for discharge to ESD sensitive items. For additional information, refer to ANSI/ESD S20.20, ESD TR20.20, ESD TR53 and the Garment Standard, ANSI/ESD STM2.1. Desco has several testers available for this purpose. For more information ask for specification drawings or operating instruction manuals by item number. Figure 4. Grounding the smock NOTE: ANSI/ESD S20.20 RECOMMENDS THAT THE GROUND COIL CORD SELECTED FOR GROUNDING OF PERSONNEL CONTAIN A BUILT-IN CURRENT LIMITING 1 MEGOHM RESISTOR. 19276 & 19277 19784 19787 Figure 6. Testers Heat Sealed Patches It is possible to heat seal patches to our smocks. The patch should be small and the smock should be tested before and after application. DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Web Site: Desco.com TB-2055 Page 3 of 4 © 2013 DESCO INDUSTRIES INC. Employee Owned Maintenance Statshield® smocks must be laundered periodically for proper operation. Desco recommends Woolite. Liquid detergents are better than dry because there is less caking and frictional wear. Use only non-ionic softeners and detergents when laundering. Launder Statshield® smocks in cool or warm water, tumble dry with low heat or hang dry. DO NOT USE BLEACH OR FABRIC SOFTENER. Launder Statshield® smocks by hand or with a washing machine. Use a standard household machine on gentle cycle or use an industrial machine if “Pony” (typically under 200 pound loads) machines are used. It is not recommended to launder these Statshield® smocks in heavy industrial laundry machines because it will lead to premature wear; degrading the ESD properties. Statshield® smocks should be tumbled dry using low heat. The carbon-suffused mono-filament nylon is sensitive to heat and should not be exposed to laundering heat in excess of 120°F. Under normal wearing and recommended washing conditions, Desco Statshield® ESD protective smocks will maintain their usefulness and effectiveness for a minimum of 100 washings. Some other ESD smocks have as little as 1% suffused carbon and lose their ESD protective qualities after a few washings. Specifications Fabric Weight* Fabric Content Carbon Mono-filament Surface Resistance Glass Transition Temp Flash Point 2.2 oz per square yard Texturized polyester and a minimum of 9% carbon mono-filament nylon. Conductive at 1 x 104 ohms, nonflaking and non-sloughing. 1 x 105 < 1 x 107 ohms, per ANSI/ESD STM2.1 and ESD TR53 of Fabrics 250°F 1040°F LIMITED WARRANTY Desco expressly warrants that for a period of two (2) years from the date of purchase or (100) one hundred wash cycles, whichever occurs first, Desco Statshield® ESD Smocks will be free of defects in material (parts) and workmanship (labor). Within the warranty period, a credit for purchase of replacement Desco Statshield® ESD Smocks, or, at our option, the Statshield® ESD Smock will be repaired or replaced free of charge. If product credit is issued, the amount will be calculated by multiplying the unused portion of the expected two year or 100 wash cycle life times the original unit purchase price. Call Customer Service at 909-627-8178 for a Return Material Authorization (RMA) and proper shipping instructions. You should include a copy of your original packing slip, invoice, or other proof of purchase date. Any unit under warranty should be shipped prepaid to the Desco factory. Warranty repairs will take approximately two weeks. If your unit is out of warranty, call Customer Service at 909-627-8178 (Chino, CA) or 781-821-8370 (Canton, MA) for a Return Material Authorization (RMA) and proper shipping instructions and address. Desco will quote repair charges necessary to bring your unit up to factory standards. WARRANTY EXCLUSIONS THE FOREGOING EXPRESS WARRANTY IS MADE IN LIEU OF ALL OTHER PRODUCT WARRANTIES, EXPRESSED AND IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH ARE SPECIFICALLY DISCLAIMED. The express warranty will not apply to defects or damage due to accidents, neglect, misuse, alterations, operator error, or failure to properly maintain, clean or repair products. LIMIT OF LIABILITY In no event will Desco or any seller be responsible or liable for any injury, loss or damage, direct or consequential, arising out of the use of or the inability to use the product. Before using, users shall determine the suitability of the product for their intended use, and users assume all risk and liability whatsoever in connection therewith. *Fabric lots vary slightly in color and weight. DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Web Site: Desco.com TB-2055 Page 4 of 4 © 2013 DESCO INDUSTRIES INC. Employee Owned