{"id":3653,"date":"2025-07-18T08:28:00","date_gmt":"2025-07-18T00:28:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3653"},"modified":"2025-07-17T19:54:51","modified_gmt":"2025-07-17T11:54:51","slug":"how-to-test-resistors-on-a-pcb-board","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/","title":{"rendered":"Come testare i resistori su una scheda PCB?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Indice per materie<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#1_Safety_Preparations\" >1. Preparativi per la sicurezza<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#2_Multimeter_Selection\" >2. Selezione del multimetro<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#Recommended_Digital_Multimeter_Specifications\" >Specifiche del multimetro digitale consigliato<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#Range_Selection_Guidelines\" >Linee guida per la selezione della gamma<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#3_Key_Measurement_Techniques\" >3. Tecniche di misurazione chiave<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#Offline_Measurement_Recommended_Method\" >Misurazione offline (metodo consigliato)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#Online_Measurement_Emergency_Method\" >Misura online (metodo di emergenza)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#4_Error_Analysis_and_Quality_Control\" >4. Analisi degli errori e controllo di qualit\u00e0<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#Common_Error_Sources\" >Fonti di errore comuni<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#Quality_Assessment_Standards\" >Standard di valutazione della qualit\u00e0<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#5_Advanced_Application_Techniques\" >5. Tecniche di applicazione avanzate<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#Precision_Resistor_Measurement\" >Misura di precisione del resistore<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#Special_Resistor_Testing\" >Test dei resistori speciali<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/how-to-test-resistors-on-a-pcb-board\/#Batch_Testing_Solutions\" >Soluzioni di test in batch<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Safety_Preparations\"><\/span>1. Preparativi per la sicurezza<span class=\"ez-toc-section-end\"><\/span><\/h2><p>La sicurezza \u00e8 sempre la priorit\u00e0 assoluta quando si eseguono misure elettroniche. Per i PCB <a href=\"https:\/\/www.topfastpcb.com\/it\/blog\/the-resistor\/\">resistore<\/a> test, \u00e8 necessario:<\/p><ul class=\"wp-block-list\"><li><strong>Disconnessione completa dell'alimentazione<\/strong>: Scollegare tutte le fonti di alimentazione, comprese le batterie e gli adattatori di corrente.<\/li>\n\n<li><strong>Trattamento di dimissione<\/strong>: Scaricare i condensatori ad alta capacit\u00e0 (utilizzare una resistenza da 10k\u03a9\/5W per la scarica).<\/li>\n\n<li><strong>Protezione ESD<\/strong>: Indossare un braccialetto antistatico e utilizzare un tappetino antistatico sul banco di lavoro.<\/li>\n\n<li><strong>Controllo dell'ambiente<\/strong>: Assicurarsi che lo spazio di lavoro sia asciutto, ben ventilato e mantenga un'umidit\u00e0 relativa di 30-70%.<\/li><\/ul><blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Suggerimento: Per i circuiti ad alta tensione (&gt;60V), attendere almeno 5 minuti per garantire la completa scarica prima di procedere.<\/p><\/blockquote><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/test-resistors.jpg\" alt=\"resistenze di prova\" class=\"wp-image-3654\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/test-resistors.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/test-resistors-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/test-resistors-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Multimeter_Selection\"><\/span>2. Selezione del multimetro<span class=\"ez-toc-section-end\"><\/span><\/h2><p>La scelta del giusto strumento di misura influisce direttamente sull'accuratezza dei risultati dei test:<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Recommended_Digital_Multimeter_Specifications\"><\/span>Specifiche del multimetro digitale consigliato<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Requisiti di base<\/strong>:<\/li>\n\n<li>Precisione: Almeno \u00b10,5% + 3 cifre<\/li>\n\n<li>Gamma di resistenza: 200\u03a9 - 20M\u03a9<\/li>\n\n<li>Corrente di prova: &lt;1mA (per evitare di danneggiare i componenti sensibili)<\/li>\n\n<li><strong>Opzioni avanzate<\/strong>:<\/li>\n\n<li>Misura Kelvin a 4 fili (elimina gli effetti della resistenza dei conduttori)<\/li>\n\n<li>Capacit\u00e0 di auto-ranging<\/li>\n\n<li>Funzione di registrazione dei dati<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Range_Selection_Guidelines\"><\/span>Linee guida per la selezione della gamma<span class=\"ez-toc-section-end\"><\/span><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Resistenza nominale<\/th><th>Intervallo consigliato<\/th><th>Risoluzione<\/th><\/tr><\/thead><tbody><tr><td>&lt;200\u03a9<\/td><td>Gamma 200\u03a9<\/td><td>0.1\u03a9<\/td><\/tr><tr><td>200\u03a9-2k\u03a9<\/td><td>Gamma 2k\u03a9<\/td><td>1\u03a9<\/td><\/tr><tr><td>2k\u03a9-20k\u03a9<\/td><td>Gamma 20k\u03a9<\/td><td>10\u03a9<\/td><\/tr><tr><td>&gt;20k\u03a9<\/td><td>Gamma automatica<\/td><td>&#8211;<\/td><\/tr><\/tbody><\/table><\/figure><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/test-resistors-3.jpg\" alt=\"resistenze di prova\" class=\"wp-image-3655\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/test-resistors-3.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/test-resistors-3-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/test-resistors-3-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Key_Measurement_Techniques\"><\/span>3. Tecniche di misurazione chiave<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Offline_Measurement_Recommended_Method\"><\/span>Misurazione offline (metodo consigliato)<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Isolamento dei componenti<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Utilizzare una pompa dissaldante o una pistola ad aria calda per rimuovere un'estremit\u00e0 del resistore.<\/li>\n\n<li>Per i resistori SMD, sollevare delicatamente un'estremit\u00e0 con una pinzetta.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Metodo di contatto<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Resistori a foro passante: Posizionare le sonde perpendicolarmente ai conduttori.<\/li>\n\n<li>Resistori SMD: Utilizzare sonde a punta fine (ideale il diametro di 0,5 mm).<\/li>\n\n<li>Componenti in miniatura: Si raccomanda l'uso di ganci di prova<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Interpretazione della lettura<\/strong>:<\/li><\/ul><ul class=\"wp-block-list\"><li>Valore normale: Entro \u00b1 tolleranza del valore nominale<\/li>\n\n<li>Condizioni anomale:<ul class=\"wp-block-list\"><li>Visualizzazione \"OL\": Guasto del circuito aperto<\/li>\n\n<li>Vicino a 0\u03a9: Guasto di cortocircuito<\/li>\n\n<li>Fluttuazione instabile: Contatto interno insufficiente<\/li><\/ul><\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Online_Measurement_Emergency_Method\"><\/span>Misura online (metodo di emergenza)<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Analisi dei circuiti equivalenti<\/strong>:<br>Disegnare uno schema parziale del circuito, calcolare la resistenza equivalente al parallelo<\/li>\n\n<li><strong>Metodo della caduta di tensione<\/strong>:<br>Misurare la tensione (V) attraverso il resistore, utilizzare la corrente nota (I) per calcolare R=V\/I<\/li>\n\n<li><strong>Metodo di confronto<\/strong>:<br>Misurare resistenze identiche nello stesso circuito come riferimento<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Error_Analysis_and_Quality_Control\"><\/span>4. Analisi degli errori e controllo di qualit\u00e0<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Error_Sources\"><\/span>Fonti di errore comuni<span class=\"ez-toc-section-end\"><\/span><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Tipo di errore<\/th><th>Livello di impatto<\/th><th>Soluzione<\/th><\/tr><\/thead><tbody><tr><td>Resistenza di contatto<\/td><td>\u00b1(1-10\u03a9)<\/td><td>Utilizzare una misura a 4 fili<\/td><\/tr><tr><td>Deriva della temperatura<\/td><td>\u00b10,4%\/\u00b0C<\/td><td>Registrare la temperatura ambiente e compensare<\/td><\/tr><tr><td>Interferenze EMI<\/td><td>Errore casuale<\/td><td>Utilizzare puntali schermati<\/td><\/tr><tr><td>Ossidazione della sonda<\/td><td>Errore +5%<\/td><td>Pulire regolarmente le punte delle sonde<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Quality_Assessment_Standards\"><\/span>Standard di valutazione della qualit\u00e0<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Secondo lo standard IPC-A-600G:<\/p><ul class=\"wp-block-list\"><li>Passaggio: Valore misurato entro \u00b110% del valore nominale (resistenze standard)<\/li>\n\n<li>Non funziona:<\/li>\n\n<li>La resistenza supera \u00b110%<\/li>\n\n<li>Letture instabili (variazione &gt;5%)<\/li>\n\n<li>Danni fisici (crepe, bruciature, ecc.)<\/li><\/ul><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/test-resistors-2.jpg\" alt=\"resistenze di prova\" class=\"wp-image-3656\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/test-resistors-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/test-resistors-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/test-resistors-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Advanced_Application_Techniques\"><\/span>5. Tecniche di applicazione avanzate<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Precision_Resistor_Measurement\"><\/span>Misura di precisione del resistore<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Metodo a corrente costante: Utilizzare una sorgente di corrente da 1 mA + un voltmetro ad alta precisione.<\/li>\n\n<li>Compensazione della temperatura: Registrare la temperatura ambiente, convertire usando la formula R25=Rt\/[1+\u03b1(T-25)]<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Special_Resistor_Testing\"><\/span>Test dei resistori speciali<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Resistori fusibili<\/strong>: Richiede il test di sovracorrente dopo la misurazione<\/li>\n\n<li><strong>NTC\/PTC<\/strong>: Misurare la curva di resistenza a diverse temperature<\/li>\n\n<li><strong>Resistori ad alta tensione<\/strong>: Utilizzare un tester di isolamento (500 V CC).<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Batch_Testing_Solutions\"><\/span>Soluzioni di test in batch<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Apparecchio di prova automatizzato + scanner multiplex<\/li>\n\n<li>Analisi statistica dei valori di CPK (requisito &gt;1,33)<\/li><\/ul>","protected":false},"excerpt":{"rendered":"<p>Un metodo professionale per testare i resistori dei circuiti stampati utilizzando un multimetro, che copre gli standard di sicurezza, la selezione degli strumenti e le fasi di misura specifiche. Questa analisi dettagliata comprende tecniche di misurazione offline\/online, analisi delle fonti di errore e criteri di valutazione della qualit\u00e0 in conformit\u00e0 con gli standard IPC, oltre a tecniche di misurazione dei resistori di precisione e soluzioni di test in batch.<\/p>","protected":false},"author":1,"featured_media":3657,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109],"tags":[325,324],"class_list":["post-3653","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","tag-resistors","tag-test-resistors"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to test resistors on a PCB board? - Topfastpcb<\/title>\n<meta name=\"description\" content=\"PCB Resistor Testing Methods: Multimeter Measurement, Error Analysis Methods, and Quality Control Standards. 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