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.
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.
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.
Description
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.
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
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
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
Teal Chest
73640
30"-32"
73641
34"-36"
73642
38"-40"
73643
42"-44"
73644
46"-48"
73645
50"-52"
73646
54"-56"
73647
58"-60"
73648
62"-64"
73649
66"-68"
Sleeve
33 3/8"
34"
34 3/8"
35"
35 1/2"
35 1/2"
37 1/2"
36 1/2"
36"
36"
LAB COATS WITH CUFFS
Blue
White
X Small
73610 73630
Small
73611 73631
Medium
73612 73632
Large
73613 73633
X Large
73614 73634
2X Large
73615 73635
3X Large
73616 73636
4X Large
73617 73637
5X Large
73618 73638
6X Large
73619 73639
Teal
73650
73651
73652
73653
73654
73655
73656
73657
73658
73659
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"
White
73820
73821
73822
73823
73824
73825
73826
73827
73828
73829
White
73830
73831
73832
73833
73834
73835
73836
73837
73838
73839
Teal
73840
73841
73842
73843
73844
73845
73846
73847
73848
73849
Chest
30"-32"
34"-36"
38"-40"
42"-44"
46"-48"
50"-52"
54"-56"
58"-60"
62"-64"
66"-68"
Sleeve
33 3/8"
34"
34 3/8"
35"
35 1/2"
35 1/2"
37 1/2"
36 1/2"
36"
36"
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"
Teal Burgundy Black
73850 73900
73860
73851 73901
73861
73852 73902
73862
73853 73903
73863
73854 73904
73864
73855 73905
73865
73856 73906
73866
73857 73907
73867
73858 73908
73868
73859 73909
73869
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
© 2011 DESCO INDUSTRIES INC.
Employee Owned
TB-2055
Page 2 of 4
Installation
Follow the directions below for proper installation and
grounding of the ESD smock.
YES!
NO!
YES!
NO!
Figure 5. Testing and monitoring of smock and ground
cord assembly
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.
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.
19250
Figure 6. Testers
19350
19780
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.
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 • 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.
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.
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.
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
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