[Marco] Akatarisa pamamita mazhinji.Zvisinei, anofunga kuti HP3458A ndiyo yakanakisisa, kunyange zvazvo yakatangwa makore anopfuura 30 apfuura muna 1989. Mumwe munhu akapa imwe kuna [Marco], asi yakaratidza mamwe mashoko ekukanganisa uye yakaratidza maitiro asina kugadzikana paakatanga, saka aida kugadziriswa.
Sekureva kwa [Marco], kodhi yekukanganisa inoratidza dambudziko neakawanda-mutsetse analog-to-digital converter, iyo ndiyo inoita kuti mita ive yakasiyana.Meta ine 8.5 manhamba, saka yakajairika kutendeuka chikamu hachizoicheka.
Nhau dzakanaka nezvenyaya iyi ndeyekuti inotipa chikonzero chekutarisa mukati mebhokisi.Yese mamaboard mukati inotaridzika yakaoma seyazvino PC mamaboard.Mukati meiyi chiyero chechokwadi, bhodhi redunhu rakafukidzwa mune yakagadziridzwa yakakwirira-inoshanda resistor network.
Iyo yakajairwa nzira yekushandura voltage kunhamba inoshandisa nguva inodiwa kuchaja uye kuburitsa capacitor, uye nguva inodiwa inomiririra voltage.Mamita anoshandisa akawanda anogoneka slope resistors, [Marco] anotsanangura kuti mita inoshandisa sei kukurumidza uye kushoma kutsetseka kuti iwane kuverenga kwakakasharara, uye yobva yashandisa inononoka uye yakaringana mutsetse kunatsiridza nhamba dzepasi.
Iyo tsika chip ine IC uye tsika resistor network.Kana ikatadza, mita inenge isingaite kugadzirisa pasina kuenda kufekitari service centre kunotenga bhodhi redunhu idzva remadhora zviuru zvitatu.Iyo tsika chip inoita kunge iri kushanda nemazvo, uye kutsiva muenzanisi anozivikanwa kukundikana hakubatsiri.
Chii chinotevera?Tenga zvikamu zvose zvaunogona kuwana zvebhodhi redunhu (inenge $ 100), uye wozotsiva zvikamu zvose.Isu tinoda nzira yake yekubvisa isina chinhu chinotungamira panguva yekuvaka patsva.Pakutanga, izvi zvaiita sezvinogoneka, asi kuzvigadzirisa kwakakundikana.Zvinoita sekuti tsika IC inogona kunge yakatyoka, saka akazotsiva bhodhi rese rekushandura.
Izvi zvakabvisa kukanganisa kukuru, asi zvimwe zviyero zvichine matambudziko, zvichiita kuti rimwe bhodhi rigadziriswe.Dunhu riri mubvunzo rinoita shanduko yeRMS pane masaini eAC.Meta ine nzira dzakasiyana dzekuyera RMS.
Vhidhiyo iyi inyaya huru yekuongorora, uye iwe uchadzidza zvakawanda nezve yakakwirira-resolution metres.Kana zvese zvakajairika, tichaona zvimwe zvisinganzwisisike, senge tambo dzinoita se capacitor uye mafeni ane ruzha.
Ndakamboshanda nainjiniya akagadzira chikamu cheanalogi.Vakataura kuti iri ibasa guru, uye vakaita zvakawanda kupfuura zvavaitarisira.Anotenda kuti ichi chikamu chechikonzero nei HP/Agilent/Keysight yatanga asi haina kumbobvira yapedza shanduro yekusimudzira.Fluke chete ine DMM inofananidzwa, uye zvinogona kutaurwa kuti iyo 3458 ichiri yakanyanya kunaka.Zvakanyanya kuoma kugadzira zvigadzirwa zviri nani.
Mumwe munhu akandiudza kuti iyo AVO8 ndiyo yakanakisa multimeter inogona kutengwa nemari.Rakavezwa padombo, rakaburutswa naMosesi mugomo panguva yokukunda.Zvaiva pachena kuti ndakanga ndarasika.
Sezvo AVO8 isingawande kudivi rino redhamu, ndakaona ichi chiri kuverenga kunonakidza… http://www.richardsradios.co.uk/avo8.html
Ndinoshuva AVO 8 pandakanga ndichiri kuyaruka, asi mitengo yavo yaidarika simba rangu.Makore makumi mana gare gare, ndine Mk II pabhenji rangu.Mumamiriro ezvinhu asinganzwisisike apo ini ndinoshanda paredhiyo yevhavha, ndinofara zvikuru kushandisa mita ine kutenderera kwakarurama.
Zvese izvi zvirinani sophistry nezve mamwe mamultimeters anobva mukusanzwisisa kweinotarisirwa kushandiswa kweHP3458A.Iyo haishandiswe kutsvaga kukanganisa kwakawanda, asi kune semiconductor hunhu, uye huchokwadi hwayo muA uye UV renji yakanaka kwazvo.Iyo 4-waya yekuyera basa (ona 6 inosunga mbiru) uye HPIB kutonga humwe humbowo hwekuti inonyanya kushandiswa kuratidza semiconductor zvishandiso.
Ndakatenga 5.5 Keithley yekare uye ndakaienzanisa neshamwari.Mugore rapfuura, zvakanga zviri nyore chaizvo.Kubva pakufananidza transistors kusvika pakuyera iyo impedance yekupinda yeaudio amplifiers.
Fluke 77 inogona kunge iri yakanaka-yechinangwa chiridzwa, asi haisi "yakanakisa" chiridzwa mune chero nharaunda.Hazvina mhosva kuti zvaunoda ndezvipi, Fluke inotengesa zvirinani: mota?88V.Nzvimbo inoputika?87V inoputika-inodzivirira nharaunda yakaoma?28 Vaviri.General Indasitiri?87V.data rekodhi?287 / 289. Industrial process control?789.
Pamusoro pemamwe mabasa ayo makumi manomwe nenomwe haagone kuita zvachose, chero ipi yezviridzwa izvi inogona kubata chero basa iro Fluke 77 inogona kupedzisa, nekururama kwepamusoro uye yakakura bandwidth.tembiricha?Conductivity?PWM basa kutenderera / kupuruzira hupamhi?frequency?microampere?Kutenderera kumhanya?Chokwadi RMS voltage?Rombo rakanaka.
Kana ichitengesa madhora mazana matatu paAmazon, isu hatitomboti Fluke 77 isarudzo yebhajeti yeamateurs.Ehe, yakachipa kupfuura mamwe mamita akanyorwa, asi izvo hazvitauri zvakawanda.(289 parizvino iri kutengeswa kune vanofarira nemadhora mazana mashanu nemakumi manomwe).Ichokwadi ndechokuti kana ukashandisa mamita kuita mari, ipapo Fluke yakarurama ichakurumidza kuzvibhadhara.Pamwe unongoda 77 mabasa.Zvakanaka, tenga 77.
Chinhu chakadai.Zvichida vashandisi vebhizinesi vanogona kunyatsotsanangura zvavanoda zvezuva nezuva.Pamwe kambani yakatumira 77s matekiniki kunze, uye maneja aive akabata chimwe chinhu chinokwanisa (senge 87s ine thermocouples) kune zvisingawanzo mamiriro anoda kuyerwa kwekushisa.Izvi zvinoratidzika sechinhu chakachenjera kuderedza mari yepamusoro, njodzi nekuda kwekuba kana kurasikirwa, nezvimwewo, asi iwe unogona kutanga kuvandudza awa imwe neimwe yaunoparadza pamamita.
Hobbyists haawanzo kutsanangudza zvinodiwa, uye havana hurongwa hwekuderera hunogona kushandiswa kubhadhara mari mumakore akati wandei.Kana tichifanira kutenga mamita maviri, kazhinji zviri nani kutenga iyo yakakodzera kwekutanga.
Nemoyo murefu, ndakazowana yangu yakashandiswa Fluke 189 (yakatangira 289) pa craigslist nemutengo wakaderedzwa.Zvinoita sekuti haina kumbobvira yasiya bhokisi rayo uye haina kunyorwa zvachose.Zano rangu kune mamwe mahobbyists nderekutenga iyo yakanyanya kushandiswa Fluke yaunogona kutenga.Iyo inogona kunge iri 77.
Handife ndakanzwisisa kushanda kwemukati kweiyo mhando yegiya.Zviripachena, akadaro, uye zvainakidza chaizvo kumuona achigadzirisa chimwe chinhu icho vamwe vanhu vaigona kurega zvinonzwisisika.
Meta yangu yekutakura zuva nezuva iFluke 8060A, iyo yandakatenga zvakare muna 1983. Apo Simpson 260 yakatonga technician toolkit, yakanga iri chimbo chekushandura mitambo, uye 8060A yakanga ichiri yakanaka.Around 1990, ndaifanira kutumira yangu 8060A kudzokera kuFluke nekuti yekuratidzira mutyairi chip yakatyoka, asi mushure mekugadzirisa ikoko, ndanga ndichishandisa iyo 8060A nguva dzose.Ini nguva pfupi yadarika ndakayera iyo Keysight 34461A 6.5 digit benchtop mita.Munguva yekuyerwa kwemagetsi kwenguva pfupi, kutsauka kweFluke 8060 kubva ku34461A mukati meiyo yakayerwa bandwidth yaive mukati me1%.Izvi hazvina kushata kumamita anga akarembera mukiti kwemakore makumi matatu kubva pakapedzisira kugadziriswa.
Ndine Fluke 80sumthinsumpthinA yekare.Anenge makore makumi maviri apfuura, ndakatenga LCD yekupedzisira yekutsiva iyo Fluke aive nayo mustock yayo!
Nekushandisa webhusaiti yedu uye masevhisi, unobvumirana pachena nekuiswa kwekuita kwedu, kushanda uye kushambadza makuki.dzidza zvimwe
Nguva yekutumira: Oct-21-2021
