TECHNICAL BULLETIN TB-2055 ESD Statshield® Protective Smocks Grounding, Testing and Maintenance NO WRISTBAND NECESSARY Made in America WRISTBAND (NOT INCLUDED) SNAPS TO CONNECT TO GARMENT COIL CORD TO GROUND COIL CORD TO GROUND Figure 1. Desco Statshield® Premium Lab Coat with Conductive Cuffs. Also available in Jacket length. Figure 2. Desco Statshield® Premium Jacket with Snaps. Also available in Jacket length. Description The Desco Statshield® premium smock incorporates our “hip-to-cuff” grounding feature which allows for hands-free grounding with no tugging at 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, providing a highly reliable connection via the user’s skin. The smock will quickly and effectively ground the person when used in this manner. Statshield Smocks are a Groundable Static Control Garment System meeting the ANSI/ESD S20.20-2007 required limit of < 3.5 X 10E7 ohm RTG tested per ANSI/ ESD STM2.1. “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 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] Outfitting a work force in ESD smocks is an important step to demonstrate a company’s commitment to their ESD control program. The Desco Statshield® ESD protective smock is designed to be antistatic, low tribocharging, and offers protection from electrostatic fields generated by clothing on the user’s body. Using high quality material with a minimum 9% carbon nylon monofilament, the smock creates a Faraday Cage around the torso of the wearer. Static charges generated by the wearer and wearer’s clothing will be shielded from ESD susceptible products. The dissipative material becomes part of the ground path to remove static charges. The smock is 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 six colors -- blue, white, teal, burgundy, black, and camouflage. The smock is constructed of a lightweight dissipative material which incorporates 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 the garment 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. DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Web Site: Desco.com TB-2055 August 2011 Page 1 of 4 © 2011 DESCO INDUSTRIES INC. Employee Owned ESD protective 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 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" Black 73860 73861 73862 73863 73864 73865 73866 73867 73868 73869 Camo 73870 73871 73872 73873 73874 73875 73876 73877 73878 73879 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: Black & Camo Jackets with Cuffs contain a Badge Holder Tab and Two Sleeve Pen Pockets. DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Web Site: Desco.com TB-2055 Page 2 of 4 © 2011 DESCO INDUSTRIES INC. Employee Owned Installation Follow the directions below for proper installation and grounding of the ESD 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 be in intimate contact with wrist skin; conductive cuff should never be allowed to be pulled up and over shirt sleeve. 3. Install a ground cord to the snap stud located above the left hand hip pocket. Connect the other end of the ground cord to a verified ground point such as a grounding block or common point mat ground. Figure 5. Testing and monitoring of smock and ground cord assembly Grounding Integrity Testing For daily testing or monitoring of the grounding integrity of Desco ESD protective smocks and ground cords, we recommend the use of standard wrist strap testers or singlewire 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 Test Kit Item #19780. 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 susceptible products. For additional information, refer to ANSI/ESD S20.20, TR20.20, and the ESD Association Garment Standard, 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 The user and the smock will now be properly grounded. The “hip to cuff” grounding feature allows greater freedom of movement of user’s arms and hands, and a reliable path to ground while the ESD smock offers extra protection against damaging electrostatic fields which may be generated by the user’s clothing. NOTE: ANSI/ESD S20.20 REQUIRES THAT THE GROUND CORD SELECTED FOR GROUNDING OF PERSONNEL CONTAIN A BUILT-IN CURRENT LIMITING 1 MEGOHM RESISTOR. 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. 19250 19350 19780 Figure 6. Testers Maintenance For proper operation, the ESD protective smock must be laundered periodically. Woolite works well. Liquid detergents are better than dry in that there is less caking and frictional wear. Launder garment in cool or warm water, tumble dry with low heat or hang dry. Launder the 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 garments in heavy industrial laundry machines as it will lead to premature wear. Garments should be tumbled dry using low heat. DO NOT USE BLEACH OR FABRIC SOFTENER. DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Web Site: Desco.com TB-2055 Page 3 of 4 © 2011 DESCO INDUSTRIES INC. Employee Owned The carbon-suffused mono-filament nylon is sensitive to heat and should not be exposed to laundering heat in excess of 120°F. Use only non-ionic softeners and detergents when laundering. 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 Static Decay Rate Glass Transition Temp Flash Point 2.2 oz per square yard Texturized polyester and a minimum of 9% carbon mono-filament nylon. Conductive at 10E4 ohms, nonflaking and non-sloughing. 10E5 - 10E6 ohms, per ESD-STM2.1 of Fabric 5000 volts to 500 volts in less than 0.1 seconds, per FTMS-101C 250°F 1040°F Note: Material sample swatches are available upon request. Fabric lots vary slightly in color and weight. If you have any question please don’t hesitate to request a sample material from our Customer Service Team. 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. DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Web Site: Desco.com TB-2055 Page 4 of 4 © 2011 DESCO INDUSTRIES INC. Employee Owned