TB-3073
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© 2017 DESCO INDUSTRIES, INC.
Employee Owned
DESCO WEST
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST
- One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website:
Desco.com
Multi-Mount Monitor
Installation, Operation and Maintenance
Description
The Desco Multi-Mount Monitor is a single workstation
continuous monitor. It continuously monitors the
path-to-ground integrity of one operator and one ESD
worksurface. Mounting tabs make it suitable to install in
workbench or equipment settings. Connect the
19653
Remote Alarm accessory to the Multi-Mount Monitor,
and place it in the operator's field of view for increased
alarm visibility.
The Multi-Mount Monitor is designed with Wave
Distortion Technology which provides stable continuous
monitoring of the path-to-ground and presence of 1
megohm resistance of an operator’s wrist strap. Audio
and visual alarms activate (in less than 50 milliseconds)
when the operator unintentionally disconnects from
the monitor or the wrist strap connection points are
intermittent. The Multi-Mount Monitor also monitors for
a worksurface path-to-ground of less than 10 megohms.
All Multi-Mount Monitors are calibrated to NIST
standards and include a certificate.
September 2017
Wave Distortion Technology is the Most Reliable
Technology for the Continuous Monitoring of
Single-Wire (Conductor) Wrist Straps
“Wave Distortion” or vector impedance works by
applying a continuous test voltage of 1.2 volts
peak-to-peak at 1 to 2 microamperes (0.000002
amperes) to the wrist strap that is connected to the
continuous or constant monitor. The test voltage
creates a sine wave that the monitor circuit compares
to established patterns. By monitoring the “distortions”,
or shape of the sine wave, Wave Distortion Technology
determines if the monitored circuit is complete - the
operator is in the circuit and the total equivalent DC
resistance is within specifications. Wave Distortion
Technology produces a very fast alarm time (<50
milliseconds) and minimal false alarms.
ANSI/ESD S20.20 section 7.3 states “Compliance
verification records shall be established and maintained
to provide evidence of conformity to the technical
requirements.” Per ANSI/ESD S1.1 Annex A.3 Daily
(wrist strap system) testing may be omitted if constant
monitoring used.” Per ESD Handbook ESD TR 20.20
section 5.3.2.4.4 “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.”
The Multi-Mount Monitor and its accessories are
available as the following item numbers:
Item
Description
19651
Multi-Mount Monitor, North American Power
Adapter
19652
Multi-Mount Monitor, Universal Power Adapter
19653
Remote Alarm
19258
Power Adapter, 100-240VAC Input, 24VDC
150mA Output, IEC Inlet
19260
Power Adapter, 100-240VAC Input, 24VDC
150mA Output, North America Plug
98221
Wave Distortion Monitor Verification Tester
Made in the
United States of America
TECHNICAL BULLETIN TB-3073
Figure 1. Desco Multi-Mount Monitor
