19226

The Multi-Mount Continuous Monitor is a real time

instrument that ensures that critical ESD generators in a

sensitive area are effectively grounded. The instant an

operator’s wrist strap or cord fails, the monitor will issue

audible and visual (LEDs) alarms alerting the user and

supervisor of the problem.

The Parking Snap features provides a means for the

operator to disconnect wrist strap cord when normally

leaving work area without audible alarm sounding. It also

provides a means of wrist strap storage.

Many customers are eliminating periodic testing 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 failures after ESD susceptible

products have been manufactured. The costs of dealing

with the resulting catastrophic or latent defects can be

considerable. Multi-Mount Continuous Monitors eliminate

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

by their function, these monitors satisfy the ISO 9000

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 all the technical alternatives available, Desco

has chosen wave distortion technology for many of its

Continuous Monitor product offerings. 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 Multi-Mount

Continuous Monitor will reliably determine if the circuit is

complete.

Wave distortion technology can be referred to “vector

impedance monitoring”. This description is valid as the

wave distortion technology measures the impedance at the

monitored banana jack and looks for changes in either the

capacitance or resistance of the circuit which includes the

wrist strap and its wearer. It uses filtering and time domain

sampling to filter out false signals caused by voltage offsets,

60 Hz fields and other electro-magnetic and electrostatic

interference.

TB-3028 April 2011 Page 1 of 4

Figure 1. Desco Multi-Mount Continuous Monitor

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 Multi-Mount Continuous Monitor

continuously monitors the integrity of one operator. This

monitor will provide virtually instantaneous notification

of static control equipment failures, eliminating the need

of periodic testing and costly record keeping. This unit

is highly cost effective as it is designed to monitor any

conventional single wire wrist strap and ground cord

system. Its small package and mounting tabs with holes

make it highly suitable to install on most any equipment

or work bench surface. In addition, optional mounting is

available using the provided adhesive-backed Velcro

strips. Using either mounting method makes the

Multi-Mount Monitor suitable for most any machinery or

workbench even in hard to reach locations.

The Desco Multi-Mount Continuous Monitor is available in

two models:

120

NIST

220

NIST

Made in America

2011 DESCO INDUSTRIES INC.

Employee Owned

- 3651 Walnut Avenue, Chino, CA 91710 (909) 627-8178 Fax (909) 627-7449

- One Colgate Way, Canton, MA 02021-1407 (781) 821-8370 Fax (781) 575-0172 Web Site: Desco.com