[UMarco] wabheka amamitha amaningi. Kodwa-ke, ucabanga ukuthi hpp345a uhamba phambili, yize abethulwa ngaphezulu kweminyaka engama-30 edlule ngonyaka we-1989. Omunye wanikela nge- [Marco] eyodwa futhi wakhombisa ukuziphatha okungazinzile lapho kukhombisa ukulungiswa okuthile.
Ngokusho [Marco], ikhodi yephutha ikhombisa inkinga nge-analog ene-analog-to-digitaly enezithombe eziningi, okuyinto eyenza imitha ihlukile. Imitha inamadijithi angama-8.5, ngakho-ke isigaba sokuguqula esivamile ngeke sikuqede.
Izindaba ezinhle ngale ndaba ukuthi zisinikeza izaba zokubheka ngaphakathi kwebhokisi. Wonke amabele ngaphakathi ngaphakathi abukeka njengenkimbinkimbi njengebhodi lesimanje le-PC Motherboard. Ngaphakathi kwaleli banga lokunemba, ibhodi yesekethe limbozwe kunethiwekhi yokumelana nokusebenza okuphezulu okwenziwe ngokwezifiso.
Indlela ejwayelekile yokuguqula i-voltage ibe yinombolo isebenzisa isikhathi esidingekayo ukukhokhisa nokukhipha i-capacitor, futhi isikhathi esidingekayo simele ivota. Imitha isebenzisa ukumelana kwamathambo amaningi, [uMarco] ichaza ukuthi imitha isebenzisa kanjani ukuthambeka okusheshayo nokunembe kancani ukuthola ukufundwa okunzima, bese isebenzisa ukuthambeka okuhamba kancane nokunembile ukucwilisa izinombolo eziphansi.
I-chip yangokwezifiso ine-IC kanye nenethiwekhi yokumelana ngokwezifiso. Uma yehluleka, imitha cishe ayinakwenzeka ukulungisa ngaphandle kokuya esikhungweni senkonzo yefektri ukuthenga ibhodi yesifunda elisha cishe ama- $ 3,000. I-chip yangokwezifiso ibukeka isebenza kahle, futhi ithathe indawo ukuqhathanisa okwaziwa ukwehluleka akusizi.
Yini elandelayo? Thenga zonke izingxenye ongayithola ebhodini lesekethe (cishe ama- $ 100), bese ubeka zonke izingxenye. Sithanda indlela yakhe yokususa isakhi esingaphenduli sihola ngesikhathi senqubo yokwakhiwa kabusha. Ekuqaleni, lokhu kwabonakala kungenzeki, kepha ukuzikhandla kwehlulekile. Kubukeka sengathi i-IC yangokwezifiso kungenzeka yaphulwe, ngakho-ke ekugcineni wangena esikhundleni sonke ibhodi leConverter.
Lokhu kusule iphutha elikhulu, kepha ezinye izilinganiso zazisenezinkinga, okwenza enye ibhodi lilungiswe. Umjikelezo okukhulunywa ngawo wenza ukuguqulwa kwe-RMS kumasiginali e-AC. Imitha inezindlela ezahlukahlukene zokulinganisa i-RMS.
Le vidiyo iyindaba enkulu yomseshi, futhi uzofunda okuningi mayelana namamitha aphezulu. Lapho konke kuyinto evamile, sizobona izinto ezithile eziyinqaba, njengamakhebuli asebenza njengama-capacitors kanye nabalandeli abanomsindo.
Ngake ngasebenza nonjiniyela owaklama ingxenye ye-analog. Uthe lokhu kungumzamo omkhulu, futhi benze umsebenzi omningi kunalokho ababekulindele. Ukholelwa ukuthi lokhu kuyingxenye yesizathu esenza i-HP / Agilight / Okhiye sekuqalile kodwa akakaze aqede inguqulo yokuthuthukisa. I-Fluke kuphela ene-DMM eqhathaniswa, futhi ingashiwo ukuthi ama-3458 asehamba phambili. Kunzima kakhulu ukukhiqiza imikhiqizo engcono.
Omunye ungitshele ukuthi i-Avo8 iyisimo esihle kakhulu sokuthi imali ingathenga. Kuqoshwe etsheni, uMose akwehlisela phansi entabeni phakathi nokunqoba. Ngokusobala ngangidukiswa.
Kusukela i-AVO8 ayivamile ngaleli dolo echibini, ngithole ukuthi lokhu kube yinto ethokozisayo ... http://www.richardsradios.co.uk/Avo8.html
Ngifisa u-Avo 8 ngisemusha, kodwa amanani abo angaphezu kwamandla ami. Eminyakeni engu-40 kamuva, ngine-MK II ebhentshini lami. Esimweni esixakile lapho ngisebenza khona emsakazweni we-valve, ngijabule kakhulu ukusebenzisa imitha ngomjikelezo ofanele.
Zonke lezi zinhloliso ezingcono mayelana nezinye iziqu ze-multimeters kusuka ekungaqondini kwesicelo esilindelekile se-HP3458A. Akusetshenziselwa ukutholwa kwephutha elijwayelekile, kepha ngenxa ye-semiconductor, futhi ukunemba kwayo ku-UV Range kuhamba phambili. Umsebenzi wokulinganisa we-4-wire (bona okuthunyelwe okungu-6 okubophayo) kanye nokulawulwa kwe-HPIB kungubufakazi obungeziwe bokuthi busetshenziselwa kakhulu ukucacisa amadivayisi we-semiconductor.
Ngithenge uKeithole wakudala ka-5.5 wawulinganisela umngani. Ngonyaka owedlule, kwakuyinto elula ngempela. Ukusuka ekufaniseni ama-transistors ukukala ukufakwa kokufakwa kwama-amplifiers audio.
I-Fluke 77 ingahle ibe yithuluzi elihle elinenjongo, kepha akuyona insimbi "engcono kakhulu" kunoma iyiphi imvelo. Akunandaba noma yini izidingo zakho, uFluke uthengisa kangcono: izimoto? 88V. Imvelo Eqhumayo? Imvelo enokhahlo le- 87V 28 ezimbili. Imboni ejwayelekile? 87V. Irekhodi ledatha? 287/289. Inqubo Yezimboni Ilawula? 789.
Ngokungeziwe kweminye imisebenzi engama-77 engakwazi ukwenza ngayo nhlobo, noma yiliphi i-Milters lingenza noma yimuphi umsebenzi uFluke 77 angaqedela, ngokunemba okuphezulu ne-bandwidth ebanzi. izinga lokushisa? Ukwenza? I-PWM DUDICY CYCY / Ububanzi? Imvamisa? MicroAmperere? Ukujikeleza isivinini? I-RMS Voltage yeqiniso? ngikufisela inhlanhla.
Lapho ithengisa ngama- $ 300 ku-Amazon, asikwazi ngisho nokusho ukuthi uFluke 77 kuyindlela yesabelomali yama-amateurs. Kuyiqiniso, kushibhile kunamanye amamitha abhalwe kuhlu, kepha lokho akusho okuningi. (289 njengamanje ithengiswa kumaqembu anentshisekelo ngama- $ 570). Iqiniso ngukuthi uma usebenzisa amamitha ukwenza imali, khona-ke i-fluke efanele izozikhokhela masinyane. Mhlawumbe udinga imisebenzi engu-77 kuphela. Kulungile, thenga i-77.
Into efana nalena. Mhlawumbe abasebenzisi bebhizinisi bangachaza ngokuqinile izidingo zabo zansuku zonke. Mhlawumbe inkampani yathumela ochwepheshe abangama-77s ngaphandle, futhi umphathi ubephethe okuthile okukwazi ngokwengeziwe (njengama-87s ane-thermocoumpules) ezimweni ezingavamile ezidinga isilinganiso sokushisa. Lokhu kubonakala kuyinto ehlakaniphile ukunciphisa izindleko ezingaphambili, ubungozi ngenxa yokwebiwa noma ukulahleka, njll., Kepha ungaqala ukuthuthukiswa njalo ngehora uchitha kumitha.
Ama-hobbyists akuvamile ukuba abe nezidingo ezichazwe ngokuqinile, futhi azinalo uhlelo lokuncipha olungasetshenziselwa ukuguqula izindleko ngaphezulu kweminyaka eminingana. Uma kufanele sithenge amamitha amabili, kuvame ukuba ngcono ukuthenga okulungile okokuqala.
Ngesineke, ekugcineni ngathola i-fluke yami esetshenzisiwe 189 (eyandulelwa engu-289) ku-craigslist ngentengo ehlisiwe. Kubukeka sengathi akukaze kushiye ibhokisi layo futhi akunakwa ngokuphelele. Iseluleko sami kwamanye ama-hobbyists ukuthenga i-fluke esetshenziswa kakhulu ongayikhokhela. Lokho kungahle kube ngu-77.
Angisoze ngaqonda ukusebenza kwangaphakathi kwalolo hlobo lwamagiya. Ngokusobala, wakwenza, futhi kwakuthakazelisa kakhulu ukumbheka elungisa okuthile abanye abantu abangakulahla ngokuqondakalayo.
Imitha yami yokuthwala yansuku zonke i-fluke 8060a, engiyithengile emuva ngo-1983. Lapho i-Simpson 260 yabusa iThuluzi lobuchwepheshe, kwakuyithuluzi elishintsha umdlalo, kanti ama-8060a ayeselungile. Cishe ngo-1990, kwadingeka ngithumele i-8060a ngibuyele emuva ku-fluke ngoba i-chip yomshayeli oboniswayo yaphulwa, kepha ngemuva kwalolokulungiswa, bengilokhu ngisebenzisa i-8060a njalo. Ngisanda kulinganisa i-key 34461A 6.5 I-Pigit Benchtop Meter. Ngesikhathi sokulinganisa kwe-voltary yesikhashana, ukuphambuka kwe-fluke 8060 kusuka ku-34461a ngaphakathi kwe-bandwidth yayo ekalwe ku-1%. Lokhu akukubi ngemitha obekulokhu kudida ekhishini iminyaka engama-30 selokhu kwaqedwa.
Ngine-fluke endala 80Sumthinsumpthina. Cishe eminyakeni engama-20 edlule, ngathenga enye indawo ye-LCD yokugcina ukuthi i-Fluke ibe nesitoko sayo!
Ngokusebenzisa iwebhusayithi yethu nezinsizakalo zethu, uvuma ngokusobala ukubekwa kokusebenza kwethu, ukusebenza kanye namakhukhi wokukhangisa. Funda kabanzi
Isikhathi sePosi: Oct-21-2021
