TECHNICAL BULLETIN TB-3037 Surface Resistance Checker Made in the Operation and Maintenance United States of America 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 Table 3 EPA ESD control items) B. During initial installation C. For periodic checks of installed products as part of ANSI/ESD S20.20 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-section 7.3) The Surface Resistance Checker is not recommended for use in Resistance to Ground (Rtg) measurements. Packaging Figure 1. Desco 19640 Surface Resistance Checker 1 Surface Resistance Checker Description 1 9V Battery 1 Certificate of Calibration The Desco 19640 Surface Resistance Checker is a portable battery powered checker fitted with built-in The following accessories are available: parallel electrodes that allow for tests of material Item Description surface resistance. This meter is designed for quick checks of surface resistance for ESD control 19641 Pair of Test Leads applications in electronics manufacturing or handling 50003 5 Pound Electrodes 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 5 resistance exceed 1 x 10 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). DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 (909) 627-8178 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 (781) 821-8370 Website: Desco.com 2017 DESCO INDUSTRIES INC. TB-3037 February 2017 Page 1 of 4 Employee OwnedD. Low Battery LED: When illuminated, this LED indicates when the battery needs to be replaced. Do not use the A 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 TOP VIEW Resistance Measurement LEDs remains illuminated. F. Battery Compartment: Remove the cover to allow access to the 9V battery compartment. B 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. C Operation D USING THE INTERNAL PARALLEL ELECTRODES E MEASURE RESISTANCE POINT-TO-POINT (Rtt) ON THE FRONT VIEW 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 commonly used portion of the surface. (2 from any edge, F 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 displayed. G 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. Note: For worksurfaces, use Desco Item 10435 Reztore REAR VIEW 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 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 C. Resistance Measurement LEDs: The resistance is surface resistance measured in ohms and read as 10EX 1/2 decade where X is the range illuminated on the checker. DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 (909) 627-8178 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 (781) 821-8370 Website: Desco.com 2017 DESCO INDUSTRIES INC. TB-3037 Page 2 of 4 Employee Owned