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Digital Surface Resistance/Resistivity
Test Kit Operation and Maintenance
Figure 1. Desco Item 19770
Description
The LCD Surface Resistance/Resistivity Test Kit is a
portable instrument designed to measure resistance
between two points (RTT), surface to ground (RTG), and
surface resistivity in accordance with ANSI EOS/ESD
Association Standard S4.1. The unit’s unique Liquid Crystal
Display (LCD) allows the user to easily read measurements
directly from the meter. No interpretation or calculations are
necessary. Per ANSI/ESD S20.20, test equipment is
required to enact Compliance Verification
Plan Requirement - Test equipment shall be selected to
make measurements of appropriate properties of the
technical requirements that are incorporated into the ESD
program plan. This unit is ideally suited for evaluating the
electrical properties of ESD protective work surfaces and
flooring products.
The LCD Surface Resistance/Resistivity Test Kit is NIST
calibrated and is available in three models:
Figure 2. Parallel Resistivity Electrodes on bottom of meter.
The meter also incorporates two parallel probes on the
bottom of the unit which allows surface resistivity
measurements. These parallel electrodes allow for quick
and easy testing of a variety of surfaces and materials,
without the use of 5 pound electrodes. The 5-pound
electrodes (item 50003), and test leads (item 50075) can be
bought separately.
The Test Kit displays a measurement per ESD S4.1-1997
proving the proper electrification period of 15 seconds
during which numerous readings and calculations are
executed.
NOTE:
Testing in accordance with ESD S4.1-
1997 requires 15 seconds of electrification; in contrast, most
analog type meters display measurements instantaneously.
Recommended Literature
Desco recommends that you read the following standards
from the ESD Association:
ANSI/ESD S20.20 — Development of ESD Control Program
ESD ADV1.0 — Glossary of Terms
ESD S4.1 — Worksurfaces
ANSI EOS/ESD S6.1— Grounding
ANSI ESD S7.1 — Floor Materials
ANSI EOS/ESD S11.11 — Surface Resistivity
These documents can be obtained directly from the ESD
Association, 7902 Turin Rd., Suite 4, Rome, NY 13440-
2069, (315) 339-6937.
In addition to the Association Standards listed previously,
anyone testing the electrical properties of ESD protective
surfaces should also obtain copies of:
MIL-HDBK 263A
EIA-IS-5-A
ASTM-F-150
EN 100015
EIA-625
These standards are available from the agencies who
produce them. If you need help in obtaining these
documents, please contact our customer service
department.
Model
Description
Voltage/Hz
19770 Test
Kit
120/50-60
19775 Test
Kit
220/50-60
19771
Tester Only
120/50-60
DESCO WEST
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449
DESCO EAST
- 90 Hudson Road, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Web Site: http://www.desco.com
TECHNICAL BULLETIN TB-2024
Made in America
