19230

No user adjustment required: The Continuous Monitor is

drift-free and designed to be insensitive to the effects of

squeezing or stretching the coil cord. It requires no user

adjustment.

The Dual Operator Workstation Continuous Monitor is a real

time instrument that ensures that critical ESD control

components in a sensitive area are effectively grounded. It

independently monitors the operator and the work surface. The

instant an operators wrist strap or cord fails, the monitor will

issue audible and visual alarms alerting the user of the

problem. In the same manner, the unit also confirms that a

from the ESD protective work surface(s).

Many customers are eliminating periodic touch testing of wrist

straps and are utilizing continuous monitoring to better ensure

that their products were manufactured in an ESD protected

environment. Full time continuous monitoring is superior to

periodic or pulsed testing, and can save a significant amount of

money in testing costs and rejected product. Periodic testing

detects wrist strap failures after ESD susceptible products have

been manufactured. The costs of dealing with the resulting

catastrophic failures or latent defects can be considerable.

Dual Operator Workstation Continuous Monitors eliminate the

need for users to test wrist straps and log the results; by their

function, these monitors satisfy the ISO and ANSI/ESD S20.20

test logging. ANSI/ESD S20.20 Paragraph 6.2.2.2 Personnel

Grounding Guidance states "A log should be maintained which

verifies that personnel have tested their personal grounding

devices." Per ESD-S1.1 Paragraph 6.1.3 "Daily (wrist strap

system) testing may be omitted if constant monitoring is used."

From the technical alternatives available, Desco designs and

manufactures many of its Continuous Monitor product offerings

using wave distortion technology . Wave distortion circuitry

monitors current/voltage phase shifts and provides true 100%

continuous monitoring. Electrical current will lead voltage at

various points due to the combinations of resistance and

capacitive reactance. By monitoring these "distortions" or

phase shifts, the wave distortion Workstation Continuous

Monitor will reliably determine if the circuit is complete.

TB-3018 May 2009 Page 1 of 4

Figure 1. Desco Dual Operator Continuous Monitor with

Satellites

Leading companies use continuous monitors as a cost

effective component in satisfying the paragraph 6.1.3

Compliance Verification Plan requirements of ANSI/ESD

S20.20. The Desco Dual Operator Continuous Monitor with

Satellites continuously monitors the grounding integrity of two

operators, and two ESD worksurfaces' path to ground. The

monitor will provide instantaneous notification of static control

equipment failures, and eliminates the need of costly and

difficult to supervise wrist strap logging record keeping. This

unit is highly cost effective as it is designed to monitor any

conventional single-wire wrist strap and ground cord system.

Per 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, then continuous monitoring should be considered or

even required."

The Dual Operator Continuous Monitor with Satellites is

available in two models.

The Dual Operator Continuous Monitor with Satellites is an

impedance sensing device designed to monitor body types

from a 5th percentile female to a 95th percentile male. This

range covers a 5 foot tall 90 pound person to a 6 foot 5 inch

250 pound person in any production environment.* The 19230

is powered by a 120 VAC, 60/50 Hz, plug-in transformer which

also provides connection to ground.

*NASA Publication 1024-Anthropomorphic Source Book Volume 1:

“Anthropometry for Designers”

** Per ANSI/ESD S20.20 paragraph 6.0.3. Tailoring "This

document, or portions thereof, may not apply to all applications.

Tailoring is accomplished by evaluating the applicability of each

requirement for the specific application. Upon completion of the

evaluation, requirements may be added, modified or deleted.

Tailoring decisions, including rationale, shall be documented in the

ESD Control Program Plan."

19230

120 Volt

19231

220 Volt

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: http://www.Desco.com

Made in America

2009 DESCO INDUSTRIES INC.

Employee Owned