19641 Desco, 19641 Datasheet - Page 2

• Manufacturer Part Number: 19641
• Description: Test Leads, 1-Pair
• Manufacturer: Desco
• Type: Leads, Surface Resistance Checkerr

Specifications of 19641

• Color: Black
• Description/function: For use with 19640 surface resistance checker
• Product: Static Monitors
• For Use With: Desco 19640 Surface Resistance Checker
• Lead Free Status / RoHS Status: na
• Lead Free Status / RoHS Status: na

TB-3037 Page 2 of 4
Features and Components
A. Electrode Banana Jacks: Insert the test leads from the
optional 5 pound electrodes here.
B. Electrode Toggle Switch: Position the switch to the
left (“INTERNAL”) to measure using the built-in parallel
electrodes on the back of the Surface Resistance Checker.
Position the switch to the right (“EXTERNAL”) to measure
using one or two of the optional 5 pound electrodes.
Figure 2. Surface Resistance Checker features and
components
TOP VIEW
FRONT VIEW
REAR VIEW
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Website:
G
A
B
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]
C
D
E
F
C. Resistance Measurement LEDs: The resistance is
measured in ohms and read as 10EX ±1/2 decade where X
is the range illuminated on the checker.
D. Low Battery LED: When illuminated, this LED indicates
when the battery needs to be replaced. Do not use the
Surface Resistance Checker when this LED is illuminated.
E. Test Contact: Use this contact area to make a surface
resistance measurement. Press and hold until one of the
Resistance Measurement LEDs remains illuminated.
F. Battery Compartment: Remove the cover to allow
access to the 9V battery compartment.
G. Parallel Electrodes: Be sure to position the Electrode
Toggle Switch to “INTERNAL” when choosing to make a
measurement using the parallel electrodes built-in on the
back of the Surface Resistance Checker.
Operation
USING THE INTERNAL PARALLEL ELECTRODES
MEASURE RESISTANCE POINT-TO-POINT (RTT) ON
THE SURFACE
• Do not clean the surface prior to testing
• Remove all items from the surface that may interfere with
• ESD sensitive devices should also be removed
• Place the Surface Resistance Checker on the most
• Toggle the Electrode Switch located at the top of the
• Press and hold the test contact until the measurement is
• If the measurement is outside acceptable limits, clean the
NOTE: For worksurfaces, use Desco Item#
Reztore™ Antistatic Surface and Mat Cleaner or other
silicone-free ESD cleaner. Be sure the surface is dry before
testing.
Figure 3. Using the internal parallel electrodes to measure
surface resistance
the test
commonly used portion of the surface (2” from any edge,
3” from any groundable point)
Surface Resistance Checker to “INTERNAL”
displayed
surface and re-test to determine if the cause of failure is
an insulative dirt layer or the surface material.
Desco.com
10435
© 2009 DESCO INDUSTRIES INC.
Employee Owned