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TB-2000 Page 4 of 4
Figure 14. Hooking up ground cords.
4. If your installation includes a floor mat, you should duplicate
step 2 and attach the floor mat ground to the same point as the
worksurface ground wire.
5. Measure the resistance from the ground snap on the mat to
the common ground point. It should read 1 megohm ± 20
percent if you are using a ground cord with a resistor, and less
than 1 ohm if you are using a non-resistor ground cord.
6. Using a surface resistance tester per ESD TR53, test the
resistance to ground from the center of the mat surface.
Required equipment: a megohmmeter with 100 volt open test
circuit voltage and two five pound electrodes per ASTM-150.
Desco sells this as the Digital Surface Resistance Test Kit,
item #19780. For more information on the 19780, ask for
Technical Bulletin TB-3014.
Desco expressly warrants that for a period of one (1) year from the
date of purchase, Desco grounding products will be free of defects in
material (parts) and workmanship (labor). Within the warranty period, the
product will be tested, repaired, or replaced at Desco’s option, free of
charge. Call our Customer Service Department at 909-627-8178 (Chino,
CA) or 781-821-8370 (Canton, MA) for a Return Material Authorization
(RMA) and proper shipping instructions and address. 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. Ship
your unit freight prepaid and Desco will quote repair charges necessary
to bring your unit up to factory standards.
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.
- 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
Figure 13. Installing 09814 to mat using supplied hardware.
Mat Installation - General Information
1. For best results, allow the mats to lay flat for about four
hours at room temperature before installing. This will give the
material time to flatten out from being rolled for shipment.
2. Test grounds for proper resistance to ground. See Desco
Technical Bulletin TB-2007 for a complete discussion of
3. Lay the mat in position and snap the ground cord to it. Bring
the other end of the ground cord to the common ground point
and attach it using the ring terminal. A suggested ground point
is the center screw of a standard AC electrical outlet. Testing is
recommended to ensure that the screw is properly grounded.
Tie the ground wire to the bench to keep it out of the way and
neat. You may cut and strip the ground wire to a shorter length
and attach it with the extra ring terminal included with each
Desco ground cord.
Figure 15. Adding the wriststrap.
BE SURE YOU TEST ALL GROUNDS AND THE WRIST STRAP
The following bulletins are available from Desco:
TB-2004 Operation of 19350 Wrist Strap Tester
TB-2005 Wrist Straps, Grounding, Testing, Maintenance
TB-2007 Safe Grounding of Static Controlled Workstations
Maintenance and Cleaning
For optimum electrical performance, Desco recommends for
work surface mats our Reztore™ Surface and Mat cleaner, item
#10435, and for floor mats our Statguard® Floor Mat cleaner,
item #10443. DO NOT USE CLEANERS WITH SILICONE. They
will build up a silicone coating on the surface which will cause
the surface to become an insulator. Many common household
cleaners contain silicone.
© 2012 DESCO INDUSTRIES INC.
7. If you are using a mat kit that includes the wrist strap, install
the wrist strap directly to the common point mat ground cord
banana jack. Again, test the resistance from the backplate of
the wrist strap to the common ground point. It should read 1
Megohm ± 20 percent.
6. The 09813 / 09814 mat ground cord may be either attached to
a mat by snapping onto a 10mm socket, or by bolting it to the
mat with the hardware supplied with the cord. When bolting
the 09814 to the mat use a 3/8" diameter hole punch to create
the hole for mounting. This will allow cord to sit flush on the
mat. Note: For both applications, remove screw from floor mat
ground before attaching to mat.
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