{"id":4070,"date":"2018-12-09T18:34:23","date_gmt":"2018-12-09T17:34:23","guid":{"rendered":"http:\/\/www.crowave.com\/blog\/?p=4070"},"modified":"2018-12-09T18:34:23","modified_gmt":"2018-12-09T17:34:23","slug":"wheatstoneov-mjerni-most-iskra-nl-0120","status":"publish","type":"post","link":"https:\/\/www.crowave.com\/blog\/2018\/12\/09\/wheatstoneov-mjerni-most-iskra-nl-0120\/","title":{"rendered":"Wheatstoneov mjerni most ISKRA NL 0120"},"content":{"rendered":"<p>Danas je nabavljen instrument za mjerenje elektri\u010dnog otpora ISKRA NL 0120. Instrument mjeri otpor u rasponu 0,05 \u2126 do 500 k\u2126 i to metodom Wheatstoneovog mjernog mosta. Ovaj instrument principijelno je isti instrumentu opisanom u objavi <a href=\"http:\/\/www.crowave.com\/blog\/2018\/05\/01\/wheatstoneov-mjerni-most-iskra-nl-024\/\" target=\"_blank\">Wheatstoneov mjerni most ISKRA NL 024<\/a>.<\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_01.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4071\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_01-1024x728.jpg\" alt=\"wheatstone_most_iskra_nl0120_01\" width=\"1024\" height=\"728\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_01-1024x728.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_01-300x213.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_01-768x546.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_01.jpg 1840w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_02.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4072\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_02-1024x638.jpg\" alt=\"wheatstone_most_iskra_nl0120_02\" width=\"1024\" height=\"638\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_02-1024x638.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_02-300x187.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_02-768x478.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_02.jpg 1113w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_04.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4074\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_04-1024x598.jpg\" alt=\"wheatstone_most_iskra_nl0120_04\" width=\"1024\" height=\"598\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_04-1024x598.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_04-300x175.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_04-768x449.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_04.jpg 1077w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Osnovna razlika izme\u0111u instrumenata NL0120 i NL024 je ta \u0161to NL0120 ima skalu raspona 0,5 &#8211; 50 \u010dime pokriva mjerni opseg od 0,05 \u2126 do 500 k\u2126, dok je skala NL024 raspona 1 &#8211; 25 \u010dime je pokriven ne\u0161to manji mjerni opseg od 0,1 \u2126 do 250 k\u2126. Oba instrumenta navedene opsege pokrivaju u \u0161est podru\u010dja: x0,1 \/ x1 \/ x10 \/ x100 \/ x1000 \/ x 10000 te se napajaju naponom od 4,5V (NL024 preko tri baterije 1,5V dok NL0120 preko jedne standardne plosnate baterije od 4,5V). Tako\u0111er, oba instrumenta imaju jednak postotak pogre\u0161ke od \u00b11%, no treba uzeti u obzir da je zbog nelinearnosti skale precizno o\u010ditanje mogu\u0107e samo na prvoj polovici skale (ili ne\u0161to malo vi\u0161e).<\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_03.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4073\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_03.jpg\" alt=\"wheatstone_most_iskra_nl0120_03\" width=\"798\" height=\"780\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_03.jpg 798w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_03-300x293.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_03-768x751.jpg 768w\" sizes=\"auto, (max-width: 798px) 100vw, 798px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_05.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4075\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_05.jpg\" alt=\"wheatstone_most_iskra_nl0120_05\" width=\"856\" height=\"955\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_05.jpg 856w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_05-269x300.jpg 269w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_05-768x857.jpg 768w\" sizes=\"auto, (max-width: 856px) 100vw, 856px\" \/><\/a><\/p>\n<p>Unutra\u0161njosti oba instrumenta tako\u0111er su vrlo sli\u010dne, a po upotrijebljenim materijalima mo\u017ee se zaklju\u010diti da je NL0120 vjerojatno ne\u0161to stariji instrument od NL024. Sa donje strane vidi se le\u017ei\u0161te za plosnatu bateriju 4,5V. Sa gornje strane otkriva se \u017ei\u010dani potenciometar sa kru\u017enom skalom, galvanometar sa svojom nul-skalom i u sredini oznake mjernih podru\u010dja spregnute sa sklopkom za odabir istih.<\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_06.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4076\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_06-1024x624.jpg\" alt=\"wheatstone_most_iskra_nl0120_06\" width=\"1024\" height=\"624\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_06-1024x624.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_06-300x183.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_06-768x468.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_06.jpg 1102w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_07.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4077\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_07-1024x621.jpg\" alt=\"wheatstone_most_iskra_nl0120_07\" width=\"1024\" height=\"621\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_07-1024x621.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_07-300x182.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_07-768x466.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_07.jpg 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_08.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4078\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_08-1024x472.jpg\" alt=\"wheatstone_most_iskra_nl0120_08\" width=\"1024\" height=\"472\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_08-1024x472.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_08-300x138.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_08-768x354.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_08.jpg 1076w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_09.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4079\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_09-1024x500.jpg\" alt=\"wheatstone_most_iskra_nl0120_09\" width=\"1024\" height=\"500\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_09-1024x500.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_09-300x147.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_09-768x375.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_09.jpg 1118w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_10.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4080\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_10.jpg\" alt=\"wheatstone_most_iskra_nl0120_10\" width=\"984\" height=\"828\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_10.jpg 984w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_10-300x252.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_10-768x646.jpg 768w\" sizes=\"auto, (max-width: 984px) 100vw, 984px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_11.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4081\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_11-1024x768.jpg\" alt=\"wheatstone_most_iskra_nl0120_11\" width=\"1024\" height=\"768\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_11-1024x768.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_11-300x225.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_11-768x576.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_11.jpg 1152w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Kad se skine maska sa galvanometarskom skalom dobije se bolji pogled na \u017ei\u010dane otpornike Wheatstoneovog mjernog mosta, na galvanometarski instrument sa zakretnim svitkom, zatim sklopku za odabir mjernih podru\u010dja te na sam \u017ei\u010dani potenciometar.Ovaj potenciometar sastoji se od otporne \u017eice koja je fiksirana na okruglu izolacijsku plo\u010du. Po otpornoj \u017eici klizi kliza\u010d \u010diji kontakt se preko spiralne bakrene opruge sa centra osovine dovodi na priklju\u010dnicu. Na osovinu takvog potenciometra pri\u010dvr\u0161\u0107ena je ba\u017edarena mjerna skala.<\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_12.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4082\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_12-1024x612.jpg\" alt=\"wheatstone_most_iskra_nl0120_12\" width=\"1024\" height=\"612\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_12-1024x612.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_12-300x179.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_12-768x459.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_12.jpg 1079w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_13.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4083\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_13-1024x707.jpg\" alt=\"wheatstone_most_iskra_nl0120_13\" width=\"1024\" height=\"707\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_13-1024x707.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_13-300x207.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_13-768x531.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_13.jpg 1103w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_14.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4084\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_14-1024x629.jpg\" alt=\"wheatstone_most_iskra_nl0120_14\" width=\"1024\" height=\"629\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_14-1024x629.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_14-300x184.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_14-768x472.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_14-570x350.jpg 570w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_14.jpg 1103w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_15.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4085\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_15-1024x643.jpg\" alt=\"wheatstone_most_iskra_nl0120_15\" width=\"1024\" height=\"643\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_15-1024x643.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_15-300x188.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_15-768x482.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_15.jpg 1120w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_16.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4086\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_16-1024x768.jpg\" alt=\"wheatstone_most_iskra_nl0120_16\" width=\"1024\" height=\"768\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_16-1024x768.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_16-300x225.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_16-768x576.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_16.jpg 1152w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_17.jpg\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4087\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_17-1024x763.jpg\" alt=\"wheatstone_most_iskra_nl0120_17\" width=\"1024\" height=\"763\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_17-1024x763.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_17-300x224.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_17-768x572.jpg 768w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_17.jpg 1106w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Sheme oba mjerna mosta tako\u0111er se zna\u010dajno ne razlikuju. Osnovna je razlika u tome \u0161to NL0120 nema nikakvih pode\u0161avaju\u0107ih (kalibracijskih) elemenata (potenciometara) u granama mosta \u010dime mu je i shema ne\u0161to jednostavnija. Mo\u017ee se primijetiti da elementi lijeve grane mosta kod NL0120 nisu simetri\u010dni tako da se kod ravnote\u017ee mosta kliza\u010d mjerne \u017eice ne nalazi to\u010dno na sredini. Ovime se postigao ve\u0107i postotak razvu\u010denosti mjerne skale za precizno o\u010ditanje vrijednosti, a pogodnim odabirom otpornika koji \u010dine mjerne grane dobio se i ne\u0161to \u0161iri mjerni opseg.<\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_18.gif\" rel=\"lightbox[4070]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-4088\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_18-1024x765.gif\" alt=\"wheatstone_most_iskra_nl0120_18\" width=\"1024\" height=\"765\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_18-1024x765.gif 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_18-300x224.gif 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_18-768x574.gif 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Princip rada mjernog mosta NL0120 je dakle potpuno isti kao i kod ve\u0107 opisanog <a href=\"http:\/\/www.crowave.com\/blog\/2018\/05\/01\/wheatstoneov-mjerni-most-iskra-nl-024\/\" target=\"_blank\">Wheatstoneovog mjernog mosta ISKRA NL 024<\/a>. Za ravnote\u017eu mosta va\u017ean je samo odnos (omjer) otpora u lijevoj i desnoj grani i kada je on isti most je u ravnote\u017ei. Isti omjer u pojedinoj grani teoretski se mo\u017ee posti\u0107i beskona\u010dnim kombinacijama odre\u0111enih otpora, no razli\u010dite vrijednosti otpora (otporne \u017eice) u praksi \u0107e rezultirati razli\u010ditim skalama, odnosno pokrivenostima mjernih podru\u010dja.<\/p>\n<p>Wheatstoneov most za mjerenje otpora ISKRA NL0120 prilikom testiranja pokazao se kao ispravan i o\u010dekivano precizan. Istina da je mjerenje otpora ovakvim instrumentom ne\u0161to slo\u017eenije i traje mo\u017eda malo dulje od mjerenja nekim u dana\u0161nje vrijeme standardnim digitalnim multimetrom sa automatskom promjenom mjernog opsega, no svako mjerenje pomo\u0107u analognog mjernog mosta nosi sa sobom i neku posebnu tehni\u010dku dra\u017e koju je te\u0161ko osjetiti kada mjerni instrument gotovo sav posao obavi umjesto vas \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Danas je nabavljen instrument za mjerenje elektri\u010dnog otpora ISKRA NL 0120. Instrument mjeri otpor u rasponu 0,05 \u2126 do 500 k\u2126 i to metodom Wheatstoneovog mjernog mosta. Ovaj instrument principijelno je isti instrumentu opisanom u objavi Wheatstoneov mjerni most ISKRA NL 024. Osnovna razlika izme\u0111u instrumenata NL0120 i NL024 je ta \u0161to NL0120 ima skalu [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4077,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":{"0":"post-4070","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-mjerni","8":"czr-hentry"},"jetpack_featured_media_url":"https:\/\/crowave.com\/blog\/wp-content\/uploads\/2018\/12\/wheatstone_most_iskra_nl0120_07.jpg","_links":{"self":[{"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/posts\/4070","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/comments?post=4070"}],"version-history":[{"count":1,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/posts\/4070\/revisions"}],"predecessor-version":[{"id":4089,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/posts\/4070\/revisions\/4089"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/media\/4077"}],"wp:attachment":[{"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/media?parent=4070"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/categories?post=4070"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/tags?post=4070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}