GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW) | ||||||
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15:14 Mar 12, 2020 |
English language (monolingual) [PRO] Tech/Engineering - Electronics / Elect Eng / electrostatic discharge | |||||||
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| Selected response from: Tony M France Local time: 06:52 | ||||||
Grading comment
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SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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4 +1 | physical electrical contact |
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4 -1 | circuit is connected to a protected connection point (suppressed test signal) to discharge the volt |
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2 | contact discharge |
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Discussion entries: 6 | |
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circuit is connected to a protected connection point (suppressed test signal) to discharge the volt Explanation: circuit is connected to a protected connection point (suppressed test signal) to discharge 6kv |
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contact discharge Explanation: contact discharge - An ESD test method where the ESD generator makes direct contact with the device under test (DUT). https://www.powersystemsdesign.com/pages/glossary/139?id=Con... Air discharge - A method for testing ESD-protection structures in which the ESD generator is discharged through an air gap between the generator and the device under test (DUT). https://www.powersystemsdesign.com/pages/glossary/139?id=Air... Electrostatic Discharge: Release of stored static electricity. Most commonly: The potentially damaging discharge of many thousands of volts that occurs when an electronic device is touched by a charged body. https://www.powersystemsdesign.com/pages/glossary/139?t=ESD -------------------------------------------------- Note added at 29 mins (2020-03-12 15:43:47 GMT) -------------------------------------------------- ESD = Electrostatic Discharge -------------------------------------------------- Note added at 33 mins (2020-03-12 15:47:11 GMT) -------------------------------------------------- The EUT (equipment under test) is subjected to three types of discharge. Direct contact discharge is preferred either directly to the EUT or indirectly through vertical or horizontal coupling planes. Air discharge is used where direct contact cannot be applied. ESD Test Levels (IEC/EN 61000-4-2) See the table here -> https://en.wikipedia.org/wiki/IEC_61000-4-2#Test_levels -------------------------------------------------- Note added at 2 hrs (2020-03-12 17:34:37 GMT) -------------------------------------------------- ESD Test Levels (IEC/EN 61000-4-2)[2] Contact discharge Air discharge Level Test voltage Test voltage 1 ±2 kV ±2 kV 2 ±4 kV ±4 kV 3 ±6 kV ±8 kV 4 ±8 kV ±15 kV -------------------------------------------------- Note added at 2 hrs (2020-03-12 17:38:42 GMT) -------------------------------------------------- IEC 61000-4-2 is an international test standard that outlines electromagnetic immunity requirements for electronic equipment when exposed to electrostatic discharge (ESD) generated from a human body or metal objects. The standard assumes that the source is an electrified human body discharge and testing simulates the current waveform generated in those conditions. Level / Test Voltage (Contact Discharge) / Test Voltage (Air Discharge) 1 2kV 2kV 2 4kV 4kV 3 6kV 8kV ... https://www.atecorp.com/compliance-standards/iec/iec-61000-4... -------------------------------------------------- Note added at 3 hrs (2020-03-12 18:15:56 GMT) -------------------------------------------------- ESD requirements have also been made more stringent. Where 6KV for contact discharge and 8KV for air discharge were sufficient in the 3rd Edition, the 4th Edition increases these to 8KV and 15KV, respectively[ii]. https://therealtimegroup.com/2018/01/08/iec-60601-1-2-4th-ed... https://www.mouser.co.uk/pdfDocs/blog_understanding-medical-... -------------------------------------------------- Note added at 3 hrs (2020-03-12 19:13:46 GMT) -------------------------------------------------- In the table presented by the Asker 'contact' stands for 'contact discharge' |
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47 mins confidence: peer agreement (net): +1
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