{"id":13503,"date":"2022-09-29T14:00:00","date_gmt":"2022-09-29T12:00:00","guid":{"rendered":"https:\/\/rdcomponents.com\/site\/?p=13503"},"modified":"2026-06-03T10:56:47","modified_gmt":"2026-06-03T08:56:47","slug":"51-la-tolleranza-sulla-temperatura","status":"publish","type":"post","link":"https:\/\/rdcomponents.com\/site\/2022\/09\/29\/51-la-tolleranza-sulla-temperatura\/","title":{"rendered":"#51 – La tolleranza sulla temperatura"},"content":{"rendered":"\n
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Oggi vi parlo del concetto\u00a0di\u00a0tolleranza\u00a0applicato all\u2019intervento\u00a0della\u00a0temperatura. Partiamo dai dispositivi bimetallici. Il funzionamento ormai \u00e8 noto: in seguito al diverso coefficiente\u00a0di\u00a0dilatazione\u00a0dei\u00a0metalli che compongono\u00a0la\u00a0lamina o il disco bimetallico, con l\u2019aumentare\u00a0della\u00a0temperatura\u00a0il bimetallo si piega e i contatti si aprono, come spiegato qui<\/strong><\/a>.\u00a0<\/p>\n\n\n\n

Si \u00e8 anche visto che \u00e8 possibile calibrare l\u2019apertura su una\u00a0temperatura\u00a0a nostra scelta, ma trattandosi\u00a0di\u00a0dispositivi meccanici e prodotti in massa, non \u00e8 possibile avere per tutti lo stesso intervento, oltre al fatto che sono numerosi i fattori che possono condizionare l\u2019esatta\u00a0temperatura\u00a0alla quale andr\u00e0 ad intervenire il termostato (articoli 8<\/strong><\/a>,\u00a038<\/strong><\/a>,\u00a039<\/strong><\/a>,\u00a045<\/strong><\/a>).<\/p>\n\n\n\n

Per questo motivo tutti questi dispositivi, sia termostati che protettori termici, hanno una tolleranza. Questa vale sia per la temperatura d\u2019intervento, che per quella di ripristino. Ecco che cos\u00ec troveremo sempre una temperatura accompagnata da un \u201c+\u201d e un \u201c-\u201c e un altro numero, e in qualche occasione due numeri. Mi spiego meglio trattando gli esempi caso per caso.<\/p>\n\n\n\n

La temperatura con la tolleranza indica il range entro il quale andr\u00e0 ad intervenire il termostato. Quindi con un 95\u00b0C +\/-3\u00b0C, significa che le soglie di intervento andranno dai 92\u00b0C ai 98\u00b0C. In alcuni casi si usa anche la percentuale, quindi se abbiamo 120\u00b0C+\/-3%, vorr\u00e0 dire che il nostro range andr\u00e0 dai 116,4\u00b0C ai 123,6\u00b0C.<\/p>\n\n\n\n

Anche le temperature di ripristino ovviamente prevedono una tolleranza, che \u00e8 sempre pi\u00f9 ampia di quella d\u2019intervento. <\/p>\n\n\n\n

Per fornire un ulteriore chiarimento possiamo fare una veloce carrellata sulla gamma di R&D Components.<\/p>\n\n\n\n

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La tolleranza nei nostri dispositivi<\/h2>\n\n\n\n

Protettori termici<\/a>:<\/strong> sono i dispositivi che offrono prestazioni pi\u00f9 basse. La tolleranza normalmente \u00e8 di +\/-5\u00b0C, anche se TMC<\/strong><\/a>, su richiesta, pu\u00f2 fornire un +\/-2,5\u00b0C. Il ripristino \u00e8 in genere lungo e approssimativo, in prevalenza i diversi produttori dichiarano 40\u00b0C+\/-15\u00b0C, e comunque non al di sotto di una temperatura di 35\u00b0C. I prodotti TOMIC<\/a> <\/strong>sono un po\u2019 pi\u00f9 ristretti perch\u00e9 hanno un 30\u00b0C +\/-15\u00b0C. Per altri prodotti, come H20<\/a><\/strong>, H21<\/a> <\/strong>e CS2<\/a><\/strong>, la temperatura di ripristino varia in funzione di quella di intervento. In particolare, essa equivale a 2\/3 della temperatura d\u2019intervento con una tolleranza di +\/-15\u00b0C. Pi\u00f9 o meno su quest\u2019ordine di grandezza anche i modelli BW-A1D<\/strong><\/a> e BW-B2D<\/strong><\/a>. <\/p>\n\n\n\n

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Termostati in aria<\/a><\/strong>: quanto detto per i protettori termici vale anche per i termostati in aria. Si tratta di un dispositivo con una tolleranza sull\u2019intervento di +\/- 5\u00b0C e un ripristino di 30\u00b0C+\/-15\u00b0C.<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

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Termostati a bulbo<\/a>:<\/strong> hanno un funzionamento diverso da quello dei bimetallici, come abbiamo visto in questo articolo<\/strong><\/a>, ma anche l\u2019intervento del termostato a bulbo ha una tolleranza che varia da +\/-3\u00b0C ai +\/-16\u00b0C in rapporto alla temperatura d\u2019intervento. Nel caso per\u00f2 dei termostati a bulbo con riarmo manuale viene usata la doppia tolleranza, vale a dire, in aggiunta alla temperatura d\u2019intervento anzich\u00e9 avere +\/-5\u00b0C ad esempio, avremo un +0\u00b0C e un \u201310\u00b0C. In realt\u00e0 non cambia nulla. Se ipotizziamo un 100\u00b0C +\/-5\u00b0C avremo un range che va da 95\u00b0C a 105\u00b0C, che equivale a 105\u00b0C +0\u00b0C \/ -10\u00b0C. In questo caso il dato di intervento che viene riferito sar\u00e0 la massima temperatura alla quale potr\u00e0 intervenire. <\/p>\n\n\n\n

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TPS<\/a>:<\/strong> come abbiamo detto in questo articolo<\/strong><\/a> i\u00a0Temperature\u00a0Power Sensor<\/em>\u00a0prodotti da\u00a0MATSUO<\/a>\u00a0<\/strong>sono dispositivi a lunga vita ed altissime prestazioni, non solo in termini\u00a0di\u00a0durata, ma anche\u00a0di\u00a0precisione nell\u2019intervento e nel ripristino. Nella fascia d\u2019intervento che va da 1\u00b0C fino a 50\u00b0C possono raggiungere una precisione\u00a0di\u00a0+\/-1,5\u00b0C, mentre ripristino pu\u00f2 essere tarato sui 4,5\u00b0C+\/-1,5\u00b0C per tutti i settaggi compresi tra i -10\u00b0C e i 75\u00b0C. Quest\u2019ultima \u00e8\u00a0la\u00a0migliore prestazione presente sul mercato.\u00a0<\/p>\n\n\n\n

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\"tolleranza\"<\/figure>\n<\/div>\n\n\n
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Termostati bimetallici<\/strong><\/a><\/strong>: questi prodotti, in modo particolare i TK24<\/strong><\/a>, attraversando una gamma di intervento che definirei immensa (-40\u00b0C +425\u00b0C) hanno scale diverse di tolleranze, ma raggiungono anche il massimo livello di precisione sull\u2019intervento che, fino a circa 110\u00b0C, pu\u00f2 essere tarato su +\/-1% e comunque non inferiore a 1\u00b0C. Per esempio, se ho un termostato che deve intervenire a 10\u00b0C+\/-1%, la tolleranza sar\u00e0 di +\/-1\u00b0C. Anche sul reset si difendono molto bene perch\u00e9 possono essere prodotti sempre fino a circa 110\u00b0C, con una riapertura (o chiusura) di 5\u00b0C+\/-3\u00b0C sotto la soglia d\u2019intervento.<\/p>\n\n\n\n

Tutti i dati sopra forniti sono ovviamente ottenuti da prove di laboratorio con tutte le condizioni ottimali possibili. Quello che poi succeder\u00e0 sul campo dipender\u00e0 dall\u2019applicazione e da tutte le varianti che in pi\u00f9 occasioni abbiamo avuto modo di citare. <\/p>\n\n\n\n

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Scarica l’articolo in versione stampabile cliccando qui sotto!<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

51-LA-TOLLERANZA-SULLA-TEMPERATURA-1<\/a>Download<\/a><\/div>\n\n\n\n
<\/div>\n","protected":false},"excerpt":{"rendered":"

Oggi vi parlo del concetto\u00a0di\u00a0tolleranza\u00a0applicato all\u2019intervento\u00a0della\u00a0temperatura. Partiamo dai dispositivi bimetallici. Il funzionamento ormai \u00e8 noto: in seguito al diverso coefficiente\u00a0di\u00a0dilatazione\u00a0dei\u00a0metalli che compongono\u00a0la\u00a0lamina o il disco bimetallico, con l\u2019aumentare\u00a0della\u00a0temperatura\u00a0il bimetallo si piega e i contatti si aprono, come spiegato qui.\u00a0 Si \u00e8 anche visto che \u00e8…<\/p>\n","protected":false},"author":2,"featured_media":11995,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[239,236],"tags":[138,204,246,245],"class_list":["post-13503","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-funzionamento-tecnico","category-prodotti","tag-protettori-termici","tag-termostati-a-bulbo","tag-termostati-bimetallici","tag-tolleranza"],"yoast_head":"\n#51 - La tolleranza sulla temperatura -<\/title>\n<meta name=\"description\" content=\"Annuale appuntamento alla fiera COILTECH per R&D. 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Si confermeranno anche quest'anno gli ottimi risultati delle passate 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Ferranti"},"sameAs":["http:\/\/rdcomponents.com\/site\/"],"url":"https:\/\/rdcomponents.com\/site\/author\/roberto\/"}]}},"rttpg_featured_image_url":{"full":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611.jpg",826,463,false],"landscape":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611.jpg",826,463,false],"portraits":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611.jpg",826,463,false],"thumbnail":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611-150x84.jpg",150,84,true],"medium":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611-300x168.jpg",300,168,true],"large":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611.jpg",826,463,false],"1536x1536":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611.jpg",826,463,false],"2048x2048":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611.jpg",826,463,false],"cornerstone_mikado_square":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611-550x463.jpg",550,463,true],"cornerstone_mikado_landscape":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611-800x463.jpg",800,463,true],"cornerstone_mikado_portrait":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611-600x463.jpg",600,463,true],"cornerstone_mikado_large_width":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611.jpg",826,463,false],"cornerstone_mikado_large_height":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611-550x463.jpg",550,463,true],"cornerstone_mikado_large_width_height":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2021\/09\/RD-Social-senza-contorno-e1717075823611.jpg",826,463,false]},"rttpg_author":{"display_name":"Roberto Ferranti","author_link":"https:\/\/rdcomponents.com\/site\/author\/roberto\/"},"rttpg_comment":0,"rttpg_category":"<a href=\"https:\/\/rdcomponents.com\/site\/category\/funzionamento-tecnico\/\" rel=\"category tag\">Funzionamento tecnico<\/a> <a href=\"https:\/\/rdcomponents.com\/site\/category\/prodotti\/\" rel=\"category tag\">Prodotti<\/a>","rttpg_excerpt":"Oggi vi parlo del concetto\u00a0di\u00a0tolleranza\u00a0applicato all\u2019intervento\u00a0della\u00a0temperatura. Partiamo dai dispositivi bimetallici. Il funzionamento ormai \u00e8 noto: in seguito al diverso coefficiente\u00a0di\u00a0dilatazione\u00a0dei\u00a0metalli che compongono\u00a0la\u00a0lamina o il disco bimetallico, con l\u2019aumentare\u00a0della\u00a0temperatura\u00a0il bimetallo si piega e i contatti si aprono, come spiegato qui.\u00a0 Si \u00e8 anche visto che \u00e8...","_links":{"self":[{"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts\/13503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/comments?post=13503"}],"version-history":[{"count":2,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts\/13503\/revisions"}],"predecessor-version":[{"id":19057,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts\/13503\/revisions\/19057"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/media\/11995"}],"wp:attachment":[{"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/media?parent=13503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/categories?post=13503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/tags?post=13503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}