Desco TB-2011 Installation Manual

TB-2011 02/01 Page 1 of 2

Field Service Kits
Operation, Installation and Maintenance

Description

Desco offers a complete line of field service kits for the
electronics field service technician as a simple and
effective means of creating an ESD protected area in
the field. Per ANSI/ESD S20.20, a protected area may
be a single workstation (fixed or portable), labratory,
room, building, or any other area with pre-designated
boundaries that contains materials and equipment
designed to limit electrostatic potentials. Featuring a
common point ground system for grounding static
control devices, these field service kits are
manufactured from antistatic materials that prevent
charge generation. When properly grounded, the Field
Service Kit mat will remove the charge from conductive
objects when they are placed on the surface.

Specifications

BRIEFCASE KIT - ITEM NO. 07710

Heat sealed from tough 16 mil blue vinyl with a
permanently attached ground cord. A heavy-duty clip
terminates the grounding cord for positive connection
to ground. The entire kit folds into a neat 8" x 10" size
and features a hook and loop closure to form a
package that will fit neatly into any tool case. For
detailed specifications ask for drawing 07710.

Surface Resisitivity = 1011Ohms
1 22.5" x 22" vinyl mat - with two pockets

1 Permanently attached grounding cord with clip
1 Adjustable wrist strap with 6 ft. cord

STANDARD SERVICE KIT – ITEM NO. 16475

This kit features a canvas carrying pouch and a red 18
mil dissipative mat. The mat has one female grounding
snap and a stitched seam around the edge. A
common-point ground cord is supplied to ground the
work mat and offers two directly grounded banana jack
receptacles for wrist strap connections as well as a
combination banana plug/alligator clip termination. For
detailed specifications ask for drawing 16475.

RTT = 106- 107Ohms
1 18" x 22" vinyl mat - with one snap

1 Common point grounding cord with clip
1 Adjustable wrist strap with 6 ft. cord

Figure 1. Proper field service ESD control.

General Guidelines

The discharge of static electricity can damage many of
the electronic components used in a variety of
equipment. Electrostatic discharge (ESD) has been a
frequent source of field service failures. Many firms are
aware of the threat of ESD in the manufacturing
environment and have adopted ESD control programs
to control static electricity. When working in field
service environments similar precautions must be
taken since sensitive components can be damaged by
ESD at any time - particularly when boards are being
handled. To ensure safe and proper operation from
ESD control devices, pay attention to the following
guidelines:

1. For proper and safe grounding, the ESD ground
must be tied directly to and at the same potential as
the "equipment" or "green wire" ground.

2. If power is to be used at an ESD protected area,
ground fault circuit interrupters (GFCIs) are
recommended.

TECHNICAL BULLETIN TB-2011

Operation (all models)

1. Remove all unnecessary items from work area.
Paper, tape, styrofoam cups and clothing can
tribocharge, creating potentially damaging static
electricity. Being insulators, static charges on these
items will NOT be drained away even when placed
on grounded field service surface.

2. Unfold the field service kit in a convenient location
and verify that the ground cord is firmly
connected to the worksurface groundable point
snap.

3. If using a wrist strap, first attach the wrist strap cord
to the groundable point snap on the worksurface. If
the worksurface has more than one groundable
point snap be sure to make contact to the same
point used in Step 2. Connections should be made
as shown in Figure 2.

DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]

DESCO EAST - 90 Hudson Road, Canton, MA 02021-1407 • [phone] • Fax [phone] • Web Site: http://www.desco.com

3. All electrical circuits at an ESD protected area,

especially those used as the tie-in point to the utility
ground, should be verified for proper wiring
configuration.

TB-2011 Page 2 of 2

DESCO INDUSTRIES INC.

Employee Owned

4. Place the wrist strap over your wrist and adjust so
that it is snug.

5. If using a standard electrical outlet, verify proper
wiring of electrical outlet with the #98130 Polarity
Ground Checker and Ground Point or equivalent.
Unscrew threaded banana plug from insulated clip
and plug it into “green wire” ground. If an outlet is
not available, attach the grounding clip to a reliable
ground point. See Figure 3.

6. You are now safely grounded and may begin work.
When handling ESD sensitive devices, be sure that
all grounding connections are maintained.
Additionally, be sure to use static shielding
packaging for transporting ESD sensitive boards.

Figure 3. Connecting ground point

Limited Warranty

Desco expressly warrants that for a period of one (1)
year from the date of purchase, Desco field service kits
will be free of defects in material (parts) and
workmanship (labor). Within the warranty period, a
component will be repaired or replaced at Desco’s option,
free of charge. Call Customer Service at 909-627-8178
(Walnut, CA) or [phone] (Canton, MA) for Return
Material Authorization (RMA) and proper shipping
instructions and address. Include a copy of your original
packing slip, invoice, or other proof of date of purchase.
Any unit under warranty should be shipped prepaid to the
Desco factory. Warranty replacements will take
approximately two weeks.

If your unit is out of warranty, Desco will quote repair
charges necessary to bring your unit up to factory
standards. Call Customer Service at 909-627-8178
(Walnut, CA) or [phone] (Canton, MA) for RMA
and proper shipping instructions and address. Ship your
unit freight prepaid.

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 • [phone] • Fax [phone]

DESCO EAST - 90 Hudson Road, Canton, MA 02021-1407 • [phone] • Fax [phone] • Web Site: http://www.desco.com

Figure 2. Common point ground connection

Maintenance

For optimum electrical performance, surfaces should
be cleaned regularly with a mild detergent and water
solution or an antistatic cleaner. Desco recommends
Reztore™ Surface and Mat Cleaner, item no. 10435.
DO NOT USE CLEANERS WITH SILICONE – they will
build up a coating on the surface which will insulate the
static control properties of the material.

The following information is available from Desco:
TB-2005 Wrist Straps, Grounding, Testing, and

Maintenance

TB-2007 Safe Grounding of Static Controlled

Workstations