Desco 19640 Technical Bulletin

Surface Resistance Checker
Operation and Maintenance
Figure 1. Desco 19640
Description
The Desco 19640
portable battery powered checker fitted with built-in
parallel electrodes that allow for tests of material
surface resistance. This meter is designed for
quick checks of surface resistance for ESD control
applications in electronics manufacturing or handling
environment. The Surface Resistance Checker is
equipped with an automatic test voltage selector. The test
voltage will switch from 10V to 100V should the measured
resistance exceed 1 x 10E5 ohms. Two banana jacks
and an electrode toggle switch allow for the connection
of two external 5 pound electrodes that measure
surface resistance point to point (RTT) or resistance to
equipment ground (RTG).
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Website:
TB-3037 May 2009 Page 1 of 4
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TECHNICAL BULLETIN TB-3037
Surface Resistance Checker
Surface Resistance Checker is a
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449
ESD protected area products should be tested:
A. Prior to installation to qualify for listing in user's ESD
control plan. Approved ESD materials (see product
qualification table at ANSI/ESD S20.20-2007 Table 3
EPA ESD control items)
B. During initial installation
C. For periodic checks of installed products as part of
ANSI/ESD S20.20-2007 Compliance Verification testing
per ESD TR53.
Compliance Verification Plan
"A Compliance Verification Plan shall be established
to ensure the Organization's fulfillment of the technical
requirements of the ESD Control Program Plan. Process
monitoring (measurements) shall be conducted in
accordance with a Compliance Verification Plan that
identifies the technical requirements to be verified, the
measurement limits and the frequency at which those
verifications shall occur. The Compliance Verification Plan
shall document the test methods and equipment used
for process monitoring and measurements. If the test
methods used by the Organization differ from any of the
standards referenced in this document, then there must
be a tailoring statement that is documented as part of the
ESD Control Program Plan. Compliance verification records
shall be established and maintained to provide evidence of
conformity to the technical requirements.
The test equipment selected shall be capable of making the
measurements defined in the Compliance Verification Plan."
(ANSI/ESDS20.20-2007 section 7.3)
Packaging
1 Surface Resistance Checker
1 9V Battery
1 Certificate of Calibration
The following accessories are available:
Item Description
19641 Pair of Test Leads
50003 5 Pound Electrodes
Made in America
Desco.com
© 2009 DESCO INDUSTRIES INC.
Employee Owned