DRAWING
NUMBER
19859
DATE:
March
2009
Premium Metal Expansion Dual Wire 4mm Wrist Straps
2009 DESCO INDUSTRIES INC.
Employee Owned
DESCO WEST: 3651 WALNUT AVE., CHINO, CA 91710 WEB SITE: Desco.com
PHONE (909) 627-8178 FAX (909) 627-7449
DESCO EAST: ONE COLGATE WAY, CANTON, MA 02021-1407
PHONE (781) 821-8370
FAX (781) 575-0172
See Drawing 19695 for details on Snap-One Coil Cords
* U.S. Patents 6,052,053 and 6,205,408
"If any part of the loop should open (become disconnected or have out of limit
resistance), the circuit will go into the alarm state" [ref TR20.20], nonetheless,
due to the redundancy inherent in the dual wire wrist strap design, the
operator will continue to be grounded via the second intact wire.
Per ESD Handbook TR20.20 section 5.3.9.2.2 Dual Conductor Resistance
Continuous Monitors, "This type of monitor is used with a two wire (dual
conductor) wrist strap. The wrist strap assembly consists of a two-wire ground
cord and a wristband that has two isolated halves. When a person is wearing
the wrist strap properly, the monitor measures the loop resistance consisting of
one wire of the ground cord, one-half of the wristband, the person's skin, the
second half of the wristband, and a second wire in the ground cord. If any part
of the loop should open (become disconnected or have out of limit resistance),
the circuit will go into the alarm state.
ESD Handbook TR 20.20 paragraph 5.3.2.4.4 Test Frequency "Because wrist
straps have a finite life, it is important to develop a test frequency that will
guarantee integrity of the system. Typical test programs recommend that wrist
straps that are used daily should be tested daily. However, if the products that
are being produced are of such value that knowledge of a continuous, reliable
ground is needed, and then continuous monitoring should be considered or
even required"
Continuous Monitors pay for themselves improving quality, productivity,
eliminating wrist strap daily testing and test result logging. Per ESD-S1.1
paragraph 6.1.3 Frequency of Functional Testing "Daily [Wrist Strap] testing
may be omitted if constant monitoring is used."
Improve wrist strap contact with Reztore
ESD Hand Lotion.
Made in America
19859
ITEM
REF. #
DESCRIPTION
19859
SE7500S Premium Metal Expansion Wristband, 4mm male snaps, small, with
Snap-One 6
’ Coil Cord, 4mm female snaps, right angle mono plug
19858
SE7500M Premium Metal Expansion Wristband, 4mm male snaps, medium, with
Snap-One 6
’ Coil Cord, 4mm female snaps, right angle mono plug
19857
SE7500L
Premium Metal Expansion Wristband, 4mm male snaps, large, with
Snap-One 6
’ Coil Cord, 4mm female snaps, right angle mono plug
Dual Wire Wrist Strap provides redundancy; even if one dual wire
wrist strap conductor is severed, operator has reliable path-to-
ground with other wire.
Used with resistive loop technology continuous monitor, continuously verifies
the proper resistance to ground of the operator
Black ABS plastic cap.
300 series stainless steel backplate (0.015" thick). Manufacturing date code
is stamped into stainless steel back plate.
4mm snaps are machined to precision profile from 300 series stainless steel
for a consistent and reliable connection.
Premium metal expansion band. Inside links are constructed of 300 Series
Stainless Steel. Width of links is 0.630".
.002" polyphenylsulfone sheet is laminated to each link before assembly.
Provides >5,000 volt RMS insulation per ASTM D149. Will not flake or peel.
Patented* dual wire technology
Superior reliability. Greatly exceeds ESD S1.1 Bending Life Test. Tested at
over 200,000 cycles vs. the 16,000 requirement
Superior warranty - See details of 1 year Limited Warranty at
Superior quality product Made in America at our Chino CA facility
Use patented* Dual Wire Wrist Strap with Desco Dual Wire Continuous Monitor
