# Technical Questions **URL:** https://forum.esda.org/c/technical-questions/7.md [Latest](https://forum.esda.org/latest.md) · [Categories](https://forum.esda.org/categories.md) --- ## [About the Technical Questions category](https://forum.esda.org/t/about-the-technical-questions-category/55)
**Author:** [@NickpESDA](https://forum.esda.org/u/NickpESDA)\ **Replies:** 2\ **Last updated:** [September 1, 2024, 2:43am UTC](https://forum.esda.org/t/about-the-technical-questions-category/55 "2024-09-01T02:43:48Z")
We encourage you to use this area to ask a technical question relating to anything ESD. Get answers/feedback from industry experts or start discussions with peers! --- ## [Seating System Failure on New Epoxy (Interface/Contact Resistance Issue)](https://forum.esda.org/t/seating-system-failure-on-new-epoxy-interface-contact-resistance-issue/1500)
**Author:** [@Nizam](https://forum.esda.org/u/Nizam)\ **Replies:** 4\ **Last updated:** [October 1, 2026, 2:42pm UTC](https://forum.esda.org/t/seating-system-failure-on-new-epoxy-interface-contact-resistance-issue/1500 "2026-10-01T14:42:43Z")
Dear Expert I am running into a stubborn contact resistance issue during a new facility qualification and would appreciate any insights from those who have dealt with hard casters on newly cured epoxy. We recently inst… --- ## [Best Practices for ESD Gloves](https://forum.esda.org/t/best-practices-for-esd-gloves/1374)
**Author:** [@Cinnamon](https://forum.esda.org/u/Cinnamon)\ **Replies:** 4\ **Last updated:** [September 30, 2026, 10:27am UTC](https://forum.esda.org/t/best-practices-for-esd-gloves/1374 "2026-09-30T10:27:39Z")
Hello all! I think this question belongs here. Apologies in advance if I’ve posted in the wrong place. I’m building a computer and have severe OCD. My hands have been washed to hell and back and back again, so they’re … --- ## [ESD Gloves/Finger Cots](https://forum.esda.org/t/esd-gloves-finger-cots/1437)
**Author:** [@joshsvoboda](https://forum.esda.org/u/joshsvoboda)\ **Replies:** 8\ **Last updated:** [September 17, 2026, 12:47pm UTC](https://forum.esda.org/t/esd-gloves-finger-cots/1437 "2026-09-17T12:47:01Z")
When ordering ESD gloves I have noticed that some vendors state that the gloves are ANSI rated while others may just state that the gloves are anti-static. The gloves are used in our electronics assembly process direct… --- ## [Walking Test Requirement for \<50V CDM](https://forum.esda.org/t/walking-test-requirement-for-50v-cdm/1478)
**Author:** [@SarbanR](https://forum.esda.org/u/SarbanR)\ **Replies:** 4\ **Last updated:** [September 11, 2026, 4:08am UTC](https://forum.esda.org/t/walking-test-requirement-for-50v-cdm/1478 "2026-09-11T04:08:40Z")
Hello All ESD Experts, We would like to seek your technical guidance regarding the walking test requirement in relation to a \<50V CDM requirement. Previously, when our applicable CDM requirement was \<200V, as per the E… --- ## [Voltage Generation and Floor Resistance](https://forum.esda.org/t/voltage-generation-and-floor-resistance/1452)
**Author:** [@Alex](https://forum.esda.org/u/Alex)\ **Replies:** 2\ **Last updated:** [August 22, 2026, 4:59pm UTC](https://forum.esda.org/t/voltage-generation-and-floor-resistance/1452 "2026-08-22T16:59:59Z")
I performed measurements on the ESD epoxy floor. The floor shows good resistance to ground and good point-to-point resistance. However, when performing the walking test, the voltages increase to above 200 volts. We repl… --- ## [Grounding system compliance verification](https://forum.esda.org/t/grounding-system-compliance-verification/1434)
**Author:** [@rose25](https://forum.esda.org/u/rose25)\ **Replies:** 6\ **Last updated:** [August 19, 2026, 12:54am UTC](https://forum.esda.org/t/grounding-system-compliance-verification/1434 "2026-08-19T00:54:51Z")
Hi Experts, would like to seek clarification regarding compliance verification of grounding systems. it says in S20.20 that compliance verification of grounding system is not required however, as I checked in S6.1 secti… --- ## [Personnel Grounding](https://forum.esda.org/t/personnel-grounding/1419)
**Author:** [@rose25](https://forum.esda.org/u/rose25)\ **Replies:** 6\ **Last updated:** [August 6, 2026, 1:18pm UTC](https://forum.esda.org/t/personnel-grounding/1419 "2026-08-06T13:18:13Z")
Hi Experts, I would like to inquire: if I am using a continuous wrist strap monitor and maintain less than 1.2 megohms resistance to ground, do I still need to include a tailoring statement? thanks in advance. --- ## [Questions on ESD Practices and Safety](https://forum.esda.org/t/questions-on-esd-practices-and-safety/892)
**Author:** [@ali](https://forum.esda.org/u/ali)\ **Replies:** 11\ **Last updated:** [August 3, 2026, 4:02pm UTC](https://forum.esda.org/t/questions-on-esd-practices-and-safety/892 "2026-08-03T16:02:11Z")
Hi all, I’m new to this forum and ESD concept :grin: I’m looking to improve my understanding of ESD safety practices and procedures. I have a few questions and would greatly appreciate your insights: In an EPA, if a … --- ## [May I seek advice on matters relating to the application of wireless anti-static wrist straps?](https://forum.esda.org/t/may-i-seek-advice-on-matters-relating-to-the-application-of-wireless-anti-static-wrist-straps/1417)
**Author:** [@Lucy](https://forum.esda.org/u/Lucy)\ **Replies:** 3\ **Last updated:** [July 28, 2026, 7:29pm UTC](https://forum.esda.org/t/may-i-seek-advice-on-matters-relating-to-the-application-of-wireless-anti-static-wrist-straps/1417 "2026-07-28T19:29:16Z")
If an operator is required to operate multiple pieces of equipment and performs mobile work, meaning only wireless wrist straps can be worn, while wired wrist straps pose a hazard due to the risk of being caught in the e… --- ## [Walk Test Requirement - Metal Flooring](https://forum.esda.org/t/walk-test-requirement-metal-flooring/1244)
**Author:** [@SY426](https://forum.esda.org/u/SY426)\ **Replies:** 3\ **Last updated:** [July 17, 2026, 12:07am UTC](https://forum.esda.org/t/walk-test-requirement-metal-flooring/1244 "2026-07-17T00:07:12Z")
Hi, In ESD TR20.20-2016, section 8.3 Footwear/ Flooring System, ANSI/ESD STM97.2 can be used to evaluate systems prior to installation or with installed floors which included all floor coverings(e.g., tiles carpets, epo… --- ## [EPA working area](https://forum.esda.org/t/epa-working-area/1069)
**Author:** [@joshsvoboda](https://forum.esda.org/u/joshsvoboda)\ **Replies:** 4\ **Last updated:** [July 7, 2026, 1:10pm UTC](https://forum.esda.org/t/epa-working-area/1069 "2026-07-07T13:10:10Z")
S20.20 references that static generating material must be kept at least 12" from sensitive working items. Taking this information would I be able to use a grounded workbench and mark a box on the benchtop as the “EPA wo… --- ## [New design of trolley](https://forum.esda.org/t/new-design-of-trolley/1401)
**Author:** [@LucieM](https://forum.esda.org/u/LucieM)\ **Replies:** 2\ **Last updated:** [July 6, 2026, 1:42pm UTC](https://forum.esda.org/t/new-design-of-trolley/1401 "2026-07-06T13:42:52Z")
Dear ESD experts, I would like to ask you few questions regarding our new design of material trolleys in our factory in CZ. The shelves are universal and we are going to use them for Motherboards, HDD, PCBA cards et… --- ## [Product Qualification of packaging](https://forum.esda.org/t/product-qualification-of-packaging/1270)
**Author:** [@rose25](https://forum.esda.org/u/rose25)\ **Replies:** 12\ **Last updated:** [June 25, 2026, 10:05am UTC](https://forum.esda.org/t/product-qualification-of-packaging/1270 "2026-06-25T10:05:32Z")
Dear Experts, would like to seek your expertise regarding product qualification. here is the scenario. i have plastic tray corrugated and slotted trays. would like to ask if the point-to-point measurement using 2-5lbs p… --- ## [Microscopes in the EPA](https://forum.esda.org/t/microscopes-in-the-epa/1383)
**Author:** [@Seon](https://forum.esda.org/u/Seon)\ **Replies:** 4\ **Last updated:** [June 16, 2026, 3:40pm UTC](https://forum.esda.org/t/microscopes-in-the-epa/1383 "2026-06-16T15:40:27Z")
I have a question regarding microscopes used within an EPA. What are the ESD requirements for these units? Specifically: Do microscopes need to be physically grounded? If grounding is not feasible, are ionizers requir… --- ## [ESD belt conveyor](https://forum.esda.org/t/esd-belt-conveyor/1366)
**Author:** [@LucieM](https://forum.esda.org/u/LucieM)\ **Replies:** 4\ **Last updated:** [May 14, 2026, 9:21am UTC](https://forum.esda.org/t/esd-belt-conveyor/1366 "2026-05-14T09:21:53Z")
Dear ESDA experts, I would like to ask how to properly measure our new ESD belt conveyor. We have this type of device for measuring: Starterkit SRM 200/ EFM 51. We were measuring offset and RGP. And RPP we were measu… --- ## [关于设备作业平台对地系统电阻测量方法](https://forum.esda.org/t/topic/1349)
**Author:** [@w610325400](https://forum.esda.org/u/w610325400)\ **Replies:** 5\ **Last updated:** [April 15, 2026, 1:49pm UTC](https://forum.esda.org/t/topic/1349 "2026-04-15T13:49:02Z")
Hello, Johnk: I would like to ask what the compliant method for measuring the ground system resistance of the automated equipment operation platform is? Currently, we have two measurement methods internally as follows: … --- ## [Integrate a heating element into the ionizer](https://forum.esda.org/t/integrate-a-heating-element-into-the-ionizer/1346)
**Author:** [@Y.ADDA](https://forum.esda.org/u/Y.ADDA)\ **Replies:** 5\ **Last updated:** [April 12, 2026, 1:57pm UTC](https://forum.esda.org/t/integrate-a-heating-element-into-the-ionizer/1346 "2026-04-12T13:57:45Z")
Hello everyone, I am currently studying a potential modification to an air ionizer system and would appreciate your feedback and experience on this topic. The idea is to integrate a heating element into the ionizer in … --- ## [Industrial practice for verification of ESD packaging](https://forum.esda.org/t/industrial-practice-for-verification-of-esd-packaging/1302)
**Author:** [@Rachel](https://forum.esda.org/u/Rachel)\ **Replies:** 17\ **Last updated:** [April 10, 2026, 7:35am UTC](https://forum.esda.org/t/industrial-practice-for-verification-of-esd-packaging/1302 "2026-04-10T07:35:16Z")
Dear Experts. I have issue in implementing the ESD packaging verification as the ESD package does not contain the same product after going thru work process in batch on fabrication, Testing, QC inspection and environmen… --- ## [ESD Clean-Room ISO 7 which is EPA Zone](https://forum.esda.org/t/esd-clean-room-iso-7-which-is-epa-zone/1335)
**Author:** [@Khassam](https://forum.esda.org/u/Khassam)\ **Replies:** 7\ **Last updated:** [March 28, 2026, 6:10am UTC](https://forum.esda.org/t/esd-clean-room-iso-7-which-is-epa-zone/1335 "2026-03-28T06:10:23Z")
Hi good Peoples We have a Clean room ISO 7. which is EPA Zone. where we need to wear a CAP to cover the hairs. i could not find any explicitly Instruction in Standards. not not IEC neither in ANSI. can we use none ESD … --- ## [Product qualification for Flooring](https://forum.esda.org/t/product-qualification-for-flooring/1324)
**Author:** [@SantiagoE](https://forum.esda.org/u/SantiagoE)\ **Replies:** 4\ **Last updated:** [February 19, 2026, 10:58pm UTC](https://forum.esda.org/t/product-qualification-for-flooring/1324 "2026-02-19T22:58:45Z")
Hello Team, Can we tailor product qualification for Flooring (from table 3, STM7.1) when we don’t know 100% sure what kind of tile was installed (old building with pre-existing tile) based on the fact that Footwear/Floo… --- ## [Body Resistance and teh Walk test](https://forum.esda.org/t/body-resistance-and-teh-walk-test/681)
**Author:** [@Sukhbeer](https://forum.esda.org/u/Sukhbeer)\ **Replies:** 1\ **Last updated:** [May 9, 2024, 1:45am UTC](https://forum.esda.org/t/body-resistance-and-teh-walk-test/681 "2024-05-09T01:45:08Z")
Hi, I am new here, but i have a question on this requirement on the Walk test and Body System Resistance. Q1: Is it a requirement to carry out this test every year, eventhough the plant is under strict temperature and … --- ## [Drag/Ground Chain testing methods](https://forum.esda.org/t/drag-ground-chain-testing-methods/1291)
**Author:** [@Zanderson](https://forum.esda.org/u/Zanderson)\ **Replies:** 10\ **Last updated:** [February 6, 2026, 9:40am UTC](https://forum.esda.org/t/drag-ground-chain-testing-methods/1291 "2026-02-06T09:40:37Z")
What are the best methods to test drag chains? After doing some testing, I’m finding it difficult to get a consistent and accurate test setup. Does anyone have a reliable method? Current Test Setup. I also varied the nu… --- ## [Conveyer machine belt surface test](https://forum.esda.org/t/conveyer-machine-belt-surface-test/1306)
**Author:** [@Pavi\_4591](https://forum.esda.org/u/Pavi_4591)\ **Replies:** 3\ **Last updated:** [February 2, 2026, 11:26pm UTC](https://forum.esda.org/t/conveyer-machine-belt-surface-test/1306 "2026-02-02T23:26:31Z")
Need some clarification regarding the conveyer belt surface test, how to test the conveyer belt surface, currently I’m using resistance meter & connect the crocodile clip on the conveyer belt surface to get the reading, … --- ## [Grounding system based on NEC 230-95](https://forum.esda.org/t/grounding-system-based-on-nec-230-95/1311)
**Author:** [@SantiagoE](https://forum.esda.org/u/SantiagoE)\ **Replies:** 1\ **Last updated:** [January 30, 2026, 7:17pm UTC](https://forum.esda.org/t/grounding-system-based-on-nec-230-95/1311 "2026-01-30T19:17:14Z")
Since my factory has a grounding system based on NEC 230-95, I have this statement, could you confirm? (I just want to add that in my procedure, since it’s the grounding logic): In accordance with NEC 230.95, the facili… --- ## [Ionizer flow disruption](https://forum.esda.org/t/ionizer-flow-disruption/1301)
**Author:** [@Duncan](https://forum.esda.org/u/Duncan)\ **Replies:** 3\ **Last updated:** [January 22, 2026, 6:23am UTC](https://forum.esda.org/t/ionizer-flow-disruption/1301 "2026-01-22T06:23:53Z")
Question on Ionizer flow, we started testing to have the Ionizers off the bench top facing the operator with a wrist strap. we also use a grounded ESD Mat under the product. we tested the Decay and getting great results … --- ## [Durable and ESD Safe work surface materials](https://forum.esda.org/t/durable-and-esd-safe-work-surface-materials/1283)
**Author:** [@Zanderson](https://forum.esda.org/u/Zanderson)\ **Replies:** 10\ **Last updated:** [January 20, 2026, 4:14pm UTC](https://forum.esda.org/t/durable-and-esd-safe-work-surface-materials/1283 "2026-01-20T16:14:28Z")
The goal of my teams current project is to find a durable, ESD safe material to assemble on, that will not scratch metal panels if dragged across them. I found a material called PC-300™, has anyone had experience with t… --- ## [HDD and DIMM testing fixtures compliance verification and product qualification](https://forum.esda.org/t/hdd-and-dimm-testing-fixtures-compliance-verification-and-product-qualification/1276)
**Author:** [@LucieM](https://forum.esda.org/u/LucieM)\ **Replies:** 6\ **Last updated:** [January 7, 2026, 8:47am UTC](https://forum.esda.org/t/hdd-and-dimm-testing-fixtures-compliance-verification-and-product-qualification/1276 "2026-01-07T08:47:52Z")
Hello experts, I would like to ask for your advice regarding our testing fixtures for DIMMs and HDDs in the RMA lab. The fixtures are located in an EPA, and we are not sure how to perform compliance verification and p… --- ## [ESD Floor Appears Connected to PE Ground – Is Dual Grounding a Certification Issue?](https://forum.esda.org/t/esd-floor-appears-connected-to-pe-ground-is-dual-grounding-a-certification-issue/1290)
**Author:** [@Y.ADDA](https://forum.esda.org/u/Y.ADDA)\ **Replies:** 2\ **Last updated:** [January 5, 2026, 4:25pm UTC](https://forum.esda.org/t/esd-floor-appears-connected-to-pe-ground-is-dual-grounding-a-certification-issue/1290 "2026-01-05T16:25:13Z")
Hello everyone, I am an engineer working in an industrial environment and I have a question regarding an ESD floor installed in a clean room. The ESD floor is normally connected to a dedicated ESD grounding system (ESD… --- ## [Winter personnel have dry skin and abnormal alarms for static wristbands](https://forum.esda.org/t/winter-personnel-have-dry-skin-and-abnormal-alarms-for-static-wristbands/1285)
**Author:** [@zhazha](https://forum.esda.org/u/zhazha)\ **Replies:** 2\ **Last updated:** [December 31, 2025, 7:50am UTC](https://forum.esda.org/t/winter-personnel-have-dry-skin-and-abnormal-alarms-for-static-wristbands/1285 "2025-12-31T07:50:32Z")
Due to winter climate factors and low environmental humidity, the wristbands worn by personnel during the operation process have abnormal alarms. How can this be resolved? [Next page](https://forum.esda.org/c/technical-questions/7.md?page=1)