Desco 19241 Technical Bulletin

Body Voltage Monitor
Installation, Operation and Maintenance
Figure 1. Desco 19241

Description

The Desco Body Voltage Monitor is a single station
continuous monitor for one operator, one ESD worksurface
and one tool ground. A second monitored jack is featured for
use by a supervisor or second operator.
The Body Voltage Monitor uses Dual-Channel Voltage
Monitoring Technology for true continuous monitoring (versus
pulsed or intermittent). The Dual-Channel Voltage Monitoring
Technology uses one lead of the dual-wire wrist strap to
provide a path-to-ground for the operator while the other lead
continuously monitors for voltage induced onto the operator
greater than ±3 VDC. Voltage on the operator can be caused
by strong AC fields in the work area or by other charge
generators such as rolling a non-ESD safe chair.
The Body Voltage Monitor has a second monitored jack for a
supervisor or a second operator if needed at the workstation.
An optional tool ground can be used to monitor the ground
integrity of a conductive tool or fixture less than 3 Ohms.
Each Body Voltage Monitor is calibrated with accepted
procedures and standards traceable to the National Institute
of Standards and Technology (NIST) and includes a NIST
certificate.
TB-3061 Page 1 of 4 February 2019
TECHNICAL BULLETIN TB-3061
Body Voltage Monitor
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website:
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."

Packaging

1 Body Voltage Monitor
1 Power Adapter, 5VDC, North America
1 Mat Monitor Cord (White)
1 Tool Monitor Cord (White)
1 Monitor Ground Cord (Green and Yellow)
1 Washer
1 Flat Head Screw, 6-32 thread
1 Alligator Clip
1 Ring Terminal
1 Mounting Bracket
2 Pan Head Screws, #8 x 3/4"
1 Certificate of Calibration
Made in the
United States of America
Desco.com
© 2019 DESCO INDUSTRIES INC
Employee Owned