The main purpose of this test is to verify the resistance to electrostatic discharge (ESD) caused by the proximity or contact of an object or person or device. Ihe ma ọ bụ mmadụ nwere ike kpokọta ụgwọ electrostatic n’ime voltaji dị elu karịa 15kv. Ahụmịhe na -egosi na ọtụtụ ọdịda na mbibi a na -akọwaghị akọwapụta nwere ike bụrụ ESD kpatara ya. Site na ịpụ site na simulator ESD ruo na nso na EUT, ngwa nnwale (EUT) na -ejide ọrụ ESD. A kọwapụtara ọkwa ịdị nfe ọfụma n’ụkpụrụ ngwaahịa yana atụmatụ ule EMC nke onye nrụpụta kwadebere. EUT na -enyocha ọdịda ma ọ bụ nnyonye anya n’ụdị ọrụ ya niile. A ga -akọwarịrị ụkpụrụ ngafe/ọdịda na atụmatụ ule EMC wee kpebie ya site n’aka ndị mepụtara ngwaahịa a.

PCB transient conductivity resistance

Ebumnuche bụ isi nke ule a bụ inyocha nguzogide nke EUT na ihe egwu na-adịte aka na obere oge na-ebili ngwa ngwa nke nwere ike ibute site na ibu ma ọ bụ ndị na-akpọtụrụ. Oge ịrị elu ngwa ngwa na ụdị nnwale ugboro ugboro nke ure nnwale a na -ebute spikes ndị a na -abanye na sekit EUT n’ụzọ dị mfe ma nwee ike itinye aka na arụmọrụ EUT. Ndị na -agafe agafe na -arụ ọrụ ozugbo na ọkọnọ ọkụ na ikike nke akara akara. N’ime ule mgbochi mgbochi PCB ndị ọzọ, ekwesịrị inyocha EUT na usoro ngafe/ọdịda site na iji nhazi ọrụ.

Resistance of PCB to electromagnetic radiation

Ebumnuche bụ isi nke nnwale a bụ ịchọpụta ikike mgbochi nnyonye anya PCB nke ngwaahịa ahụ megide redio, transceivers, ekwentị GSM/AMPS mkpanaka, yana ọtụtụ elektrọnik dị iche iche sitere na isi ọkụ eletrọnị mmepụta ihe. Ọ bụrụ na echechighị sistemụ ahụ, radieshon electromagnetic nwere ike jikọta ya na eriri interface wee banye na sekit ahụ site n’ụzọ ụzọ; Ma ọ bụ enwere ike ijikọ ya na wiring nke sekit e biri ebi. When the amplitude of the rf electromagnetic field is large enough, the induced voltage and demodulated carrier can affect the normal operation of the device.

PCB radiation resistance Test run This test run is usually the longest and most difficult, requiring very expensive equipment and considerable experience. In contrast to other PCB immunity tests, success/failure criteria defined by the manufacturer and a written test plan must be sent to the test room. Mgbe ị na -enye EUT nri n’ọhịa radieshon, ekwesịrị ịtọ EUT ka ọ na -arụ ọrụ nkịtị yana ọnọdụ kacha nwee mmetụta.

A ga -etinyerịrị ọrụ nkịtị n’ime ụlọ nnwale mgbe ekpughere EUT na mpaghara nnyonye anya akararịrị nke ugboro ole gafere 80MHz ruo 1GHz chọrọ. Some PCB anti-interference standards start at 27MHz. Ogo ogo a na -achọkarị nguzogide PCB nke 1V/m, 3V/m, ma ọ bụ 10V/m. Agbanyeghị, nkọwa ngwaọrụ nwere ike nwee ihe nke ha chọrọ maka ugboro ugboro “nsogbu (nnyonye anya)”. The appropriate PCB radiation resistance level of the product is of interest to the manufacturer.

Ihe achọrọ n’ọhịa jikọtara ọnụ ọkọlọtọ ọhụrụ na-eguzogide nnyonye anya PCB EN50082-1: 1997 na-ezo aka na IEC/EN61000-4-3. IEC/EN61000-4-3 chọrọ gburugburu ule jikọtara ọnụ dabere na nlele ule. The test environment was realized in an anechoic room with tiles arranged with ferrite absorbers to block reflection and resonance in order to establish a unified test site indoors. Nke a na-emeri mperi nnwale na-adịghị emegharị ugboro ugboro nke ntụgharị uche na gradient dị n’ime ụlọ adịghị edepụta. (Ime ụlọ nke obere ihe anechoic bụkwa ebe dị mma maka ịlele nchapu radieshon na gburugburu ebe obibi na-adịghị mma nke chọrọ izi ezi).

Mwube nke ime ụlọ anechoic ime ụlọ RF ga-ahazi na mgbidi na elu ụlọ nke ime ụlọ anechoic. Nhazi na nkọwapụta atụmatụ RF kwesịrị ịnabata taịl ferrite dị arọ nke dị n’elu ụlọ. Brik Ferrite na -anọdụ n’elu ihe ọkụ eletrik wee jikọta ya n’elu ụlọ ahụ. N’ime ime ụlọ a na -edozighị anya, ịtụgharị uche site na igwe ahụ ga -eme ka resonance na ebili mmiri guzo ọtọ, nke na -emepụta ọnụ ọnụ na ọdọ mmiri n’ike oghere ule. Igwe gradient n’ime ụlọ a na -edeghị ede nwere ike ịbụ 20 ruo 40dB, nke a ga -eme ka nlele ule yie ihe dara na mberede n’ọhịa dị ala. Resonance nke ime ụlọ na -ebute nkwụghachi nnwale nnwale dị ala yana ọnụego dị elu nke “overtesting”. (Nke a nwere ike ibute imewe ngwaahịa a.) Ọkwa ọhụrụ PCB mgbochi mgbochi IEC1000-4-3, nke chọrọ otu ihe achọrọ n’ọhịa, edozila nnukwu adịghị ike ndị a.

Akụrụngwa na ngwanrọ achọrọ iji wepụta saịtị nnwale ahụ chọrọ nnukwu igwe mgbasa ozi RF dị elu iji chụpụ antenna na-ebufe eriri ugboro ugboro karịa 26MHz ruo 2GHz, nke dị mita 3 site na ngwaọrụ a na-anwale. Fully automated testing and calibration under software control provides greater flexibility for testing and full control of all key parameters such as scan rate, frequency pause time, modulation and field strength. Nko ngwanrọ na -enye ohere imekọrịta nleba anya na mkpali nke arụmọrụ EUT. Achọrọ njirimara mmekọrịta na nnwale n’ezie iji mee ka mgbanwe ozugbo na ngwanrọ nnwale EMC na kwa nkeji EUT. Njirimara nnweta onye ọrụ a na -enye ohere ịdekọ data niile ngwa ngwa maka nyocha dị mma na nkewa nke arụmọrụ EUT EMC.

Ndị na -amịkpọ pyramidal Ndị na -amịnye ihe na pyramidal (conical) dị irè, agbanyeghị nha nke pyramid ahụ na -eme ka ọ ghara ikwe omume ịnwale obere oghere enwere ike ime ụlọ. Maka obere ala nke 80MHz, ekwesịrị ịbelata ogologo ihe na -amị pyramid ka ọ bụrụ 100cm, yana iji rụọ ọrụ na obere ala nke 26MHz, ogologo nke ihe na -amị pyramid kwesịrị ịdị ukwuu karịa 2m. Ndị na -etinye pyramid nwekwara ọghọm. Ha na -emebi emebi, na -emebi ngwa ngwa site na nkwekọrịta, na -enwu ọkụ. Ọ baghịkwa uru iji ihe ndị a na -amịkọrọ ihe n’ala ụlọ. N’ihi ikpo ọkụ nke pyramid absorber, ike ubi karịrị 200V/m n’ime oge ga -abụ nnukwu ihe egwu.

Ferrite tile absorber

Taịlị Ferrite na -arụ ọrụ nke ọma, agbanyeghị na ha na -agbakwunye nnukwu ibu na elu ụlọ, mgbidi na ọnụ ụzọ ụlọ ahụ, yabụ nhazi usoro ụlọ ahụ na -adị oke mkpa. Ha na -arụ ọrụ nke ọma na obere ikuku ugboro ugboro, mana ha na -adịchaghị arụ ọrụ na ugboro ugboro karịa 1GHz. Taịl Ferrite dị okirikiri (100mm × 100mm × 6mm) ma nwee ike iguzogide ike ubi karịrị 1000V/m na -enweghị ọkụ.

Ihe isi ike na nnwale radieshon PCB N’ihi na akụrụngwa inyeaka ejiri rụọ EUT na-enye akara mkpali iji nyochaa arụmọrụ nke ya, ọ ga-abụrịrị onwe ya na-eguzogide PCB n’ọhịa a dị nro, nke bụ ihe isi ike dị n’ime na-eme nnwale nnwale radieshon. Nke a na -ebutekarị ihe isi ike, ọkachasị mgbe akụrụngwa inyeaka dị mgbagwoju anya ma chọọ ọtụtụ eriri na oghere na EUT nke gbabara n’ime ụlọ nnwale echedoro. Ekwesịrị ịchebe eriri niile na -agafe n’ime ụlọ nnwale na/ma ọ bụ nzacha ka e wee chebe ha n’ule ahụ iji zere ibelata arụmọrụ nke ụlọ nnwale ahụ. Nkwenye na arụmọrụ mkpuchi nke ụlọ nnwale ahụ ga -ebute mwepu nke saịtị nnwale ahụ na gburugburu gburugburu, nke nwere ike ibute nnyonye anya ndị ọrụ ụdịdị dị iche iche. Ọ naghị adị mfe mgbe niile iji ihe nzacha RF maka data ma ọ bụ ahịrị mgbaama, dịka mgbe enwere data buru ibu ma ọ bụ mgbe ejiri njikọ data dị elu.