TECHNICAL BULLETIN TB-3037 Surface Resistance Checker Made in America Operation and Maintenance ESD protected area products should be tested: A. Prior to installation to qualify for listing in users 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 Organizations 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 Figure 1. Desco 19640 Surface Resistance Checker 1 9V Battery 1 Certificate of Calibration Description The following accessories are available: The Desco 19640 Surface Resistance Checker is a portable battery powered checker fitted with built-in Item Description parallel electrodes that allow for tests of material 19641 Pair of Test Leads surface resistance. This meter is designed for 50003 5 Pound Electrodes 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 WEST - 3651 Walnut Avenue, Chino, CA 91710 (909) 627-8178 Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 (781) 821-8370 Fax (781) 575-0172 Website: Desco.com 2009 DESCO INDUSTRIES INC. TB-3037 May 2009 Page 1 of 4 Employee OwnedC. Resistance Measurement LEDs: The resistance is Features and Components measured in ohms and read as 10EX 1/2 decade where X is the range illuminated on the checker. A 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. TOP VIEW 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. B 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 C back of the Surface Resistance Checker. D Operation E USING THE INTERNAL PARALLEL ELECTRODES FRONT VIEW 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 the test ESD sensitive devices should also be removed Place the Surface Resistance Checker on the most F commonly used portion of the surface (2 from any edge, 3 from any groundable point) Toggle the Electrode Switch located at the top of the Surface Resistance Checker to INTERNAL Press and hold the test contact until the measurement is G displayed If the measurement is outside acceptable limits, clean the surface and re-test to determine if the cause of failure is an insulative dirt layer or the surface material. REAR VIEW NOTE: For worksurfaces, use Desco Item 10435 Reztore Antistatic Surface and Mat Cleaner or other silicone-free ESD cleaner. Be sure the surface is dry before testing. Figure 2. Surface Resistance Checker 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 3. Using the internal parallel electrodes to measure surface resistance DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 (909) 627-8178 Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 (781) 821-8370 Fax (781) 575-0172 Website: Desco.com 2009 DESCO INDUSTRIES INC. Employee Owned TB-3037 Page 2 of 4