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vector-button-flush-left vector-button-flush-right" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Menú principal" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Menú principal</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Menú principal</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">amaga</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navegació </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Portada" title="Visiteu la pàgina principal [z]" accesskey="z"><span>Portada</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Especial:Article_aleatori" title="Carrega una pàgina a l’atzar [x]" accesskey="x"><span>Article a l'atzar</span></a></li><li id="n-Articles-de-qualitat" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Articles_de_qualitat"><span>Articles de qualitat</span></a></li> </ul> </div> </div> <div id="p-Comunitat" class="vector-menu mw-portlet mw-portlet-Comunitat" > <div class="vector-menu-heading"> Comunitat </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-portal" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Portal" title="Sobre el projecte, què podeu fer, on trobareu les coses"><span>Portal viquipedista</span></a></li><li id="n-Agenda-d'actes" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Trobades"><span>Agenda d'actes</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Especial:Canvis_recents" title="Una llista dels canvis recents al wiki [r]" accesskey="r"><span>Canvis recents</span></a></li><li id="n-La-taverna" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:La_taverna"><span>La taverna</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Contacte"><span>Contacte</span></a></li><li id="n-Xat" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Canals_IRC"><span>Xat</span></a></li><li id="n-help" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Ajuda" title="El lloc per a saber més coses"><span>Ajuda</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Portada" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Viquipèdia" src="/static/images/mobile/copyright/wikipedia-wordmark-ca.svg" style="width: 7.5em; height: 1.4375em;"> <img class="mw-logo-tagline" alt="l'Enciclopèdia Lliure" src="/static/images/mobile/copyright/wikipedia-tagline-ca.svg" width="120" height="14" style="width: 7.5em; height: 0.875em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Especial:Cerca" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Cerca a la Viquipèdia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Cerca</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Cerca a Viquipèdia" aria-label="Cerca a Viquipèdia" autocapitalize="sentences" title="Cerca a la Viquipèdia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Especial:Cerca"> </div> <button class="cdx-button cdx-search-input__end-button">Cerca</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Eines personals"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Aparença"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Aparença" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Aparença</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=ca.wikipedia.org&uselang=ca" class=""><span>Donatius</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Especial:Crea_compte&returnto=Pol%C3%ADmetre" title="Us animem a crear un compte i iniciar una sessió, encara que no és obligatori" class=""><span>Crea un compte</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Especial:Registre_i_entrada&returnto=Pol%C3%ADmetre" title="Us animem a registrar-vos, però no és obligatori [o]" accesskey="o" class=""><span>Inicia la sessió</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Més opcions" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Eines personals" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Eines personals</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Menú d'usuari" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=ca.wikipedia.org&uselang=ca"><span>Donatius</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Especial:Crea_compte&returnto=Pol%C3%ADmetre" title="Us animem a crear un compte i iniciar una sessió, encara que no és obligatori"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Crea un compte</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Especial:Registre_i_entrada&returnto=Pol%C3%ADmetre" title="Us animem a registrar-vos, però no és obligatori [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Inicia la sessió</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pàgines per a editors no registrats <a href="/wiki/Ajuda:Introducci%C3%B3" aria-label="Vegeu més informació sobre l'edició"><span>més informació</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Especial:Contribucions_pr%C3%B2pies" title="Una llista de les modificacions fetes des d'aquesta adreça IP [y]" accesskey="y"><span>Contribucions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Especial:Discussi%C3%B3_personal" title="Discussió sobre les edicions per aquesta adreça ip. [n]" accesskey="n"><span>Discussió per aquest IP</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Lloc"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contingut" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contingut</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">amaga</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inici</div> </a> </li> <li id="toc-Introducció" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Introducció"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Introducció</span> </div> </a> <ul id="toc-Introducció-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Història" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Història"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Història</span> </div> </a> <ul id="toc-Història-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Com_mesurar_amb_el_multímetre_digital" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Com_mesurar_amb_el_multímetre_digital"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Com mesurar amb el multímetre digital</span> </div> </a> <button aria-controls="toc-Com_mesurar_amb_el_multímetre_digital-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Commuta la subsecció Com mesurar amb el multímetre digital</span> </button> <ul id="toc-Com_mesurar_amb_el_multímetre_digital-sublist" class="vector-toc-list"> <li id="toc-Mesurant_tensions" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Mesurant_tensions"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Mesurant tensions</span> </div> </a> <ul id="toc-Mesurant_tensions-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mesurant_resistències" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Mesurant_resistències"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Mesurant resistències</span> </div> </a> <ul id="toc-Mesurant_resistències-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mesurant_intensitats" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Mesurant_intensitats"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>Mesurant intensitats</span> </div> </a> <ul id="toc-Mesurant_intensitats-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Referències" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referències"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Referències</span> </div> </a> <ul id="toc-Referències-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contingut" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Commuta la taula de continguts." > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Commuta la taula de continguts.</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Polímetre</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vés a un article en una altra llengua. Disponible en 53 llengües" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-53" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">53 llengües</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%85%D9%82%D9%8A%D8%A7%D8%B3_%D9%85%D8%AA%D8%B9%D8%AF%D8%AF_%D8%A7%D9%84%D8%A3%D8%BA%D8%B1%D8%A7%D8%B6" title="مقياس متعدد الأغراض - àrab" lang="ar" hreflang="ar" data-title="مقياس متعدد الأغراض" data-language-autonym="العربية" data-language-local-name="àrab" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9C%D1%83%D0%BB%D1%8C%D1%82%D1%8B%D0%BC%D0%B5%D1%82%D1%80" title="Мультыметр - belarús" lang="be" hreflang="be" data-title="Мультыметр" data-language-autonym="Беларуская" data-language-local-name="belarús" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9C%D1%83%D0%BB%D1%82%D0%B8%D0%BC%D0%B5%D1%82%D1%8A%D1%80" title="Мултиметър - búlgar" lang="bg" hreflang="bg" data-title="Мултиметър" data-language-autonym="Български" data-language-local-name="búlgar" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AE%E0%A6%BE%E0%A6%B2%E0%A7%8D%E0%A6%9F%E0%A6%BF%E0%A6%AE%E0%A6%BF%E0%A6%9F%E0%A6%BE%E0%A6%B0" title="মাল্টিমিটার - bengalí" lang="bn" hreflang="bn" data-title="মাল্টিমিটার" data-language-autonym="বাংলা" data-language-local-name="bengalí" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Multimetr" title="Multimetr - txec" lang="cs" hreflang="cs" data-title="Multimetr" data-language-autonym="Čeština" data-language-local-name="txec" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Multimeter" title="Multimeter - danès" lang="da" hreflang="da" data-title="Multimeter" data-language-autonym="Dansk" data-language-local-name="danès" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Multimeter" title="Multimeter - alemany" lang="de" hreflang="de" data-title="Multimeter" data-language-autonym="Deutsch" data-language-local-name="alemany" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A0%CE%BF%CE%BB%CF%8D%CE%BC%CE%B5%CF%84%CF%81%CE%BF" title="Πολύμετρο - grec" lang="el" hreflang="el" data-title="Πολύμετρο" data-language-autonym="Ελληνικά" data-language-local-name="grec" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Multimeter" title="Multimeter - anglès" lang="en" hreflang="en" data-title="Multimeter" data-language-autonym="English" data-language-local-name="anglès" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Plurmezurilo" title="Plurmezurilo - esperanto" lang="eo" hreflang="eo" data-title="Plurmezurilo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Mult%C3%ADmetro" title="Multímetro - espanyol" lang="es" hreflang="es" data-title="Multímetro" data-language-autonym="Español" data-language-local-name="espanyol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Multimeeter" title="Multimeeter - estonià" lang="et" hreflang="et" data-title="Multimeeter" data-language-autonym="Eesti" data-language-local-name="estonià" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Multimetro" title="Multimetro - basc" lang="eu" hreflang="eu" data-title="Multimetro" data-language-autonym="Euskara" data-language-local-name="basc" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%85%D9%88%D9%84%D8%AA%DB%8C%E2%80%8C%D9%85%D8%AA%D8%B1" title="مولتی‌متر - persa" lang="fa" hreflang="fa" data-title="مولتی‌متر" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Yleismittari" title="Yleismittari - finès" lang="fi" hreflang="fi" data-title="Yleismittari" data-language-autonym="Suomi" data-language-local-name="finès" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Multim%C3%A8tre" title="Multimètre - francès" lang="fr" hreflang="fr" data-title="Multimètre" data-language-autonym="Français" data-language-local-name="francès" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Mult%C3%ADmetro" title="Multímetro - gallec" lang="gl" hreflang="gl" data-title="Multímetro" data-language-autonym="Galego" data-language-local-name="gallec" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gu mw-list-item"><a href="https://gu.wikipedia.org/wiki/%E0%AA%AE%E0%AA%B2%E0%AB%8D%E0%AA%9F%E0%AA%BF%E0%AA%AE%E0%AB%80%E0%AA%9F%E0%AA%B0" title="મલ્ટિમીટર - gujarati" lang="gu" hreflang="gu" data-title="મલ્ટિમીટર" data-language-autonym="ગુજરાતી" data-language-local-name="gujarati" class="interlanguage-link-target"><span>ગુજરાતી</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A8%D7%91-%D7%9E%D7%95%D7%93%D7%93" title="רב-מודד - hebreu" lang="he" hreflang="he" data-title="רב-מודד" data-language-autonym="עברית" data-language-local-name="hebreu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AE%E0%A4%B2%E0%A5%8D%E0%A4%9F%E0%A5%80%E0%A4%AE%E0%A5%80%E0%A4%9F%E0%A4%B0" title="मल्टीमीटर - hindi" lang="hi" hreflang="hi" data-title="मल्टीमीटर" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Multimetar" title="Multimetar - croat" lang="hr" hreflang="hr" data-title="Multimetar" data-language-autonym="Hrvatski" data-language-local-name="croat" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Multimeter" title="Multimeter - indonesi" lang="id" hreflang="id" data-title="Multimeter" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesi" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Multimetro" title="Multimetro - italià" lang="it" hreflang="it" data-title="Multimetro" data-language-autonym="Italiano" data-language-local-name="italià" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%9B%9E%E8%B7%AF%E8%A8%88" title="回路計 - japonès" lang="ja" hreflang="ja" data-title="回路計" data-language-autonym="日本語" data-language-local-name="japonès" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%9B%E1%83%A3%E1%83%9A%E1%83%A2%E1%83%98%E1%83%9B%E1%83%94%E1%83%A2%E1%83%A0%E1%83%98" title="მულტიმეტრი - georgià" lang="ka" hreflang="ka" data-title="მულტიმეტრი" data-language-autonym="ქართული" data-language-local-name="georgià" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%9C%D1%83%D0%BB%D1%8C%D1%82%D0%B8%D0%BC%D0%B5%D1%82%D1%80" title="Мультиметр - kazakh" lang="kk" hreflang="kk" data-title="Мультиметр" data-language-autonym="Қазақша" data-language-local-name="kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%AE%E0%B2%B2%E0%B3%8D%E0%B2%9F%E0%B2%BF%E0%B2%AE%E0%B3%80%E0%B2%9F%E0%B2%B0%E0%B3%8D" title="ಮಲ್ಟಿಮೀಟರ್ - kannada" lang="kn" hreflang="kn" data-title="ಮಲ್ಟಿಮೀಟರ್" data-language-autonym="ಕನ್ನಡ" data-language-local-name="kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%A9%80%ED%8B%B0%EB%AF%B8%ED%84%B0" title="멀티미터 - coreà" lang="ko" hreflang="ko" data-title="멀티미터" data-language-autonym="한국어" data-language-local-name="coreà" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Moltimeter" title="Moltimeter - llombard" lang="lmo" hreflang="lmo" data-title="Moltimeter" data-language-autonym="Lombard" data-language-local-name="llombard" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9C%D1%83%D0%BB%D1%82%D0%B8%D0%BC%D0%B5%D1%82%D0%B0%D1%80" title="Мултиметар - macedoni" lang="mk" hreflang="mk" data-title="Мултиметар" data-language-autonym="Македонски" data-language-local-name="macedoni" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%AE%E0%B5%BE%E0%B4%9F%E0%B5%8D%E0%B4%9F%E0%B4%BF%E0%B4%AE%E0%B5%80%E0%B4%B1%E0%B5%8D%E0%B4%B1%E0%B5%BC" title="മൾട്ടിമീറ്റർ - malaiàlam" lang="ml" hreflang="ml" data-title="മൾട്ടിമീറ്റർ" data-language-autonym="മലയാളം" data-language-local-name="malaiàlam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Multimeter" title="Multimeter - malai" lang="ms" hreflang="ms" data-title="Multimeter" data-language-autonym="Bahasa Melayu" data-language-local-name="malai" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Multimeter" title="Multimeter - neerlandès" lang="nl" hreflang="nl" data-title="Multimeter" data-language-autonym="Nederlands" data-language-local-name="neerlandès" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Multimeter" title="Multimeter - noruec nynorsk" lang="nn" hreflang="nn" data-title="Multimeter" data-language-autonym="Norsk nynorsk" data-language-local-name="noruec nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Multimeter" title="Multimeter - noruec bokmål" lang="nb" hreflang="nb" data-title="Multimeter" data-language-autonym="Norsk bokmål" data-language-local-name="noruec bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Miernik_uniwersalny" title="Miernik uniwersalny - polonès" lang="pl" hreflang="pl" data-title="Miernik uniwersalny" data-language-autonym="Polski" data-language-local-name="polonès" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Mult%C3%ADmetro" title="Multímetro - portuguès" lang="pt" hreflang="pt" data-title="Multímetro" data-language-autonym="Português" data-language-local-name="portuguès" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Multimetru" title="Multimetru - romanès" lang="ro" hreflang="ro" data-title="Multimetru" data-language-autonym="Română" data-language-local-name="romanès" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9C%D1%83%D0%BB%D1%8C%D1%82%D0%B8%D0%BC%D0%B5%D1%82%D1%80" title="Мультиметр - rus" lang="ru" hreflang="ru" data-title="Мультиметр" data-language-autonym="Русский" data-language-local-name="rus" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Multimetar" title="Multimetar - serbocroat" lang="sh" hreflang="sh" data-title="Multimetar" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbocroat" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Multimeter" title="Multimeter - Simple English" lang="en-simple" hreflang="en-simple" data-title="Multimeter" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9C%D1%83%D0%BB%D1%82%D0%B8%D0%BC%D0%B5%D1%82%D0%B0%D1%80" title="Мултиметар - serbi" lang="sr" hreflang="sr" data-title="Мултиметар" data-language-autonym="Српски / srpski" data-language-local-name="serbi" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Multim%C3%A9ter" title="Multiméter - sondanès" lang="su" hreflang="su" data-title="Multiméter" data-language-autonym="Sunda" data-language-local-name="sondanès" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Multimeter" title="Multimeter - suec" lang="sv" hreflang="sv" data-title="Multimeter" data-language-autonym="Svenska" data-language-local-name="suec" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%AA%E0%AE%B2%E0%AF%8D%E0%AE%AA%E0%AE%AF%E0%AE%A9%E0%AF%8D_%E0%AE%85%E0%AE%B3%E0%AE%B5%E0%AE%BF" title="பல்பயன் அளவி - tàmil" lang="ta" hreflang="ta" data-title="பல்பயன் அளவி" data-language-autonym="தமிழ்" data-language-local-name="tàmil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%AE%E0%B0%B2%E0%B1%8D%E0%B0%9F%E0%B1%80%E0%B0%AE%E0%B1%80%E0%B0%9F%E0%B0%B0%E0%B1%8D" title="మల్టీమీటర్ - telugu" lang="te" hreflang="te" data-title="మల్టీమీటర్" data-language-autonym="తెలుగు" data-language-local-name="telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/%C3%96l%C3%A7%C3%BC_aleti_(elektrik)" title="Ölçü aleti (elektrik) - turc" lang="tr" hreflang="tr" data-title="Ölçü aleti (elektrik)" data-language-autonym="Türkçe" data-language-local-name="turc" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-ug mw-list-item"><a href="https://ug.wikipedia.org/wiki/%D9%85%D9%88%D9%84%D8%AA%D9%89%D9%85%D9%89%D8%AA%D9%89%D8%B1" title="مولتىمىتىر - uigur" lang="ug" hreflang="ug" data-title="مولتىمىتىر" data-language-autonym="ئۇيغۇرچە / Uyghurche" data-language-local-name="uigur" class="interlanguage-link-target"><span>ئۇيغۇرچە / Uyghurche</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9C%D1%83%D0%BB%D1%8C%D1%82%D0%B8%D0%BC%D0%B5%D1%82%D1%80" title="Мультиметр - ucraïnès" lang="uk" hreflang="uk" data-title="Мультиметр" data-language-autonym="Українська" data-language-local-name="ucraïnès" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Avometr" title="Avometr - uzbek" lang="uz" hreflang="uz" data-title="Avometr" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/%C4%90%E1%BB%93ng_h%E1%BB%93_v%E1%BA%A1n_n%C4%83ng" title="Đồng hồ vạn năng - vietnamita" lang="vi" hreflang="vi" data-title="Đồng hồ vạn năng" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E4%B8%87%E7%94%A8%E8%A1%A8" title="万用表 - xinès wu" lang="wuu" hreflang="wuu" data-title="万用表" data-language-autonym="吴语" data-language-local-name="xinès wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a 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href="/wiki/Pol%C3%ADmetre"><span>Mostra</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Pol%C3%ADmetre&action=edit" title="Modifica el codi font d'aquesta pàgina [e]" accesskey="e"><span>Modifica</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Pol%C3%ADmetre&action=history"><span>Mostra l'historial</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Especial:Enlla%C3%A7os/Pol%C3%ADmetre" title="Una llista de totes les pàgines wiki que enllacen amb aquesta [j]" accesskey="j"><span>Què hi enllaça</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Especial:Seguiment/Pol%C3%ADmetre" rel="nofollow" title="Canvis recents a pàgines enllaçades des d'aquesta pàgina [k]" accesskey="k"><span>Canvis relacionats</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Especial:P%C3%A0gines_especials" title="Llista totes les pàgines especials [q]" accesskey="q"><span>Pàgines especials</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Pol%C3%ADmetre&oldid=34329358" title="Enllaç permanent a aquesta revisió de la pàgina"><span>Enllaç permanent</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Pol%C3%ADmetre&action=info" title="Més informació sobre aquesta pàgina"><span>Informació de la pàgina</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Especial:Citau&page=Pol%C3%ADmetre&id=34329358&wpFormIdentifier=titleform" title="Informació sobre com citar aquesta pàgina"><span>Citau aquest article</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Especial:UrlQ%C4%B1sald%C4%B1c%C4%B1s%C4%B1&url=https%3A%2F%2Fca.wikipedia.org%2Fwiki%2FPol%25C3%25ADmetre"><span>Obtén una URL abreujada</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Especial:QrKodu&url=https%3A%2F%2Fca.wikipedia.org%2Fwiki%2FPol%25C3%25ADmetre"><span>Descarrega el codi QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Imprimeix/exporta </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Especial:Llibre&bookcmd=book_creator&referer=Pol%C3%ADmetre"><span>Crea un llibre</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Especial:DownloadAsPdf&page=Pol%C3%ADmetre&action=show-download-screen"><span>Baixa com a PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Pol%C3%ADmetre&printable=yes" title="Versió per a impressió d'aquesta pàgina [p]" accesskey="p"><span>Versió per a impressora</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> En altres projectes </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:Multimeters" hreflang="en"><span>Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q189996" title="Enllaç a l'element del repositori de dades connectat [g]" accesskey="g"><span>Element a Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Eines de la pàgina"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aparença"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Aparença</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">amaga</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">De la Viquipèdia, l'enciclopèdia lliure</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="ca" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:Digital_Multimeter_Aka.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Digital_Multimeter_Aka.jpg/220px-Digital_Multimeter_Aka.jpg" decoding="async" width="220" height="262" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Digital_Multimeter_Aka.jpg/330px-Digital_Multimeter_Aka.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Digital_Multimeter_Aka.jpg/440px-Digital_Multimeter_Aka.jpg 2x" data-file-width="672" data-file-height="800" /></a><figcaption>digital multimeter</figcaption></figure> <p>Un <b>polímetre</b>, també anomenat <b>multímetre</b> o <i><b>tester</b></i>, és un <a href="/wiki/Instrument_de_mesura" class="mw-redirect" title="Instrument de mesura">instrument de mesura</a> <a href="/wiki/Electr%C3%B2nica" title="Electrònica">electrònic</a> que mesura magnituds elèctriques, ja siguin actives (corrents, potencials...) o passives (resistències, capacitats…). Pot fer mesures en <a href="/wiki/Corrent_continu" title="Corrent continu">corrent continu</a> o en <a href="/wiki/Corrent_altern" title="Corrent altern">corrent altern</a>, depenent de l'instrument. </p><p>Els podem agrupar en dos grups: </p> <ul><li>analògics: la magnitud que es mesura és representada amb un dial graduat i una agulla.</li> <li>digitals(DMM): la magnitud es representa com un valor numèric en un <i>display.</i></li></ul> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Introducció"><span id="Introducci.C3.B3"></span>Introducció</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Pol%C3%ADmetre&action=edit&section=1" title="Modifica la secció: Introducció"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>És un aparell tècnic molt versàtil, que es basa en la utilització d'un instrument de mesura (un <b><a href="/wiki/Galvan%C3%B2metre" title="Galvanòmetre">galvanòmetre</a></b> molt sensible). Per poder mesurar cada una de les magnituds elèctriques, aquest galvanòmetre s'ha de completar amb un determinat <a href="/wiki/Circuit_el%C3%A8ctric" title="Circuit elèctric">circuit elèctric</a>, que dependrà de dues característiques del galvanòmetre: la <a href="/wiki/Resist%C3%A8ncia_interna" title="Resistència interna">resistència interna</a> (Ri) i la inversa de la sensibilitat. Aquesta última és la intensitat que, aplicada directament als borns del galvanòmetre, fa que l'agulla arribi al fons de l'escala.A part del galvanòmetre, el polímetre també consta d'altres elements: L'<b>escala múltiple</b>, per la qual es desplaça una agulla que. permet llegir els valors de les diferents magnituds en els diferents marges de mesura. Un <b>commutador</b> que permet canviar la funció del polímetre perquè actiu com ha mesurador en totes les seves versions i marges de mesura. Dos o més borns elèctrics permeten connectar el polímetre als circuits o components exteriors els quals els seus valors s'intenten mesurar. Els borns d'accés solen tenir colors per facilitar la correcció de les connexions exteriors. Quan es mesura en CC (<a href="/wiki/Corrent_continu" title="Corrent continu">corrent continu</a>), sol ser de color vermell, la de major potencial (o potencial +) i la de color negre sol ser la de menor potencial (o potencial -) </p><p>La majoria porta com a mínim un <a href="/wiki/Amper%C3%ADmetre" title="Amperímetre">amperímetre</a>, un <a href="/wiki/Volt%C3%ADmetre" title="Voltímetre">voltímetre</a> i un <a href="/wiki/%C3%92hmmetre" class="mw-redirect" title="Òhmmetre">òhmmetre</a>. Altres funcions disponibles en algunes unitats són: </p> <ol><li>Un comprovador de continuïtat, que xiula quan hi ha conducció elèctrica entre les dues sondes.</li> <li>Representació en pantalla digital (en comptes d'una escala analògica) de la magnitud que s'està mesurant.</li> <li>Un <a href="/wiki/Amplificador_d%27instrumentaci%C3%B3" title="Amplificador d'instrumentació">amplificador</a> per percebre <a href="/wiki/Voltatge" class="mw-redirect" title="Voltatge">voltatges</a> i <a href="/wiki/Corrent_el%C3%A8ctric" title="Corrent elèctric">corrents</a> menuts i elevats <a href="/wiki/Resist%C3%A8ncia_el%C3%A8ctrica_(propietat)" title="Resistència elèctrica (propietat)">resistències</a>.</li> <li>Mesura d'<a href="/wiki/Induct%C3%A0ncia" title="Inductància">inductàncies</a> i <a href="/wiki/Capacit%C3%A0ncia" title="Capacitància">capacitàncies</a>. Ajuda a comprovar els components, sobretot als tècnics que han d'elaborar i reparar equips.</li> <li>Comprovador de <a href="/wiki/D%C3%ADode" title="Díode">díodes</a> i <a href="/wiki/Transistor" title="Transistor">transistors</a>. Especialment popular entre els reparadors d'equips.</li> <li>Escales de <a href="/wiki/Temperatura" title="Temperatura">temperatura</a> per a <a href="/w/index.php?title=Termoacoblador&action=edit&redlink=1" class="new" title="Termoacoblador (encara no existeix)">termoacobladors</a> estàndard. Permet connectar sondes de temperàtura (generalment resistències de <a href="/wiki/Plat%C3%AD" title="Platí">platí</a>) i calibrar l'escala ràpidament.</li> <li>Un <a href="/wiki/Oscil%C2%B7lador" title="Oscil·lador">oscil·lador</a> de <a href="/wiki/Freq%C3%BC%C3%A8ncia" title="Freqüència">freqüència</a> mitjana, un detector i un amplificador d'ones amb altaveu, per a fer diagnosi i ajustos en circuits de <a href="/wiki/R%C3%A0dio" title="Ràdio">ràdio</a>. Açò sol ser un estàndard en bastants models russos. És un substitut prou barat i compacte d'un <a href="/wiki/Oscil%C2%B7loscopi" title="Oscil·loscopi">oscil·loscopi</a>. Permet escoltar el senyal en comptes de veure'l.</li> <li>Un oscil·loscopi de velocitat de mostreig per sobre del milió de mostres per segon. Està implantant-se en els polímetres de gamma mitjana controlats per ordinador, o fins i tot els polímetres dins de l'ordinador.</li> <li>Comprovador telefònic.</li> <li>Comprovador de circuits d'automoció.</li> <li>Emmagatzematge dels voltatges màxim i mìnim.</li></ol> <div class="mw-heading mw-heading2"><h2 id="Història"><span id="Hist.C3.B2ria"></span>Història</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Pol%C3%ADmetre&action=edit&section=2" title="Modifica la secció: Història"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La seva invenció ve donada de la mà de <a href="/wiki/Donald_Macadie" class="mw-redirect" title="Donald Macadie">Donald Macadie</a>, un enginyer de la British Post Office, a qui se li va ocórrer l'enginyosa idea d'unificar 3 aparells en un, com són l'amperímetre, el voltímetre i, finalment, l'òhmmetre, d'aquí ve el nom de multímetre AVO. Aquesta magnífica creació va facilitar el treball a totes les persones que estudiaven qualsevol àmbit de l'<a href="/wiki/Electr%C3%B2nica" title="Electrònica">electrònica</a>. </p><p><i>Donald Macadie</i> va ser un dels responsables de la creació del polímetre, també anomenat <i>multímetre</i> o <i>tester</i>, va ser un enginyer del British Post Office, va néixer l'any <a href="/wiki/1871" title="1871">1871</a> i va morir l'any <a href="/wiki/1956" title="1956">1956</a>,<sup><a href="/wiki/Donald_Macadie#cite_note-1" class="mw-redirect" title="Donald Macadie">[1]</a></sup> i el van enterrar en el cementiri britànic de Pernes. La seva idea va ser unificar tres aparells en un: <a href="/wiki/Amper%C3%ADmetre" title="Amperímetre">amperímetre</a>, <a href="/wiki/Volt%C3%ADmetre" title="Voltímetre">voltímetre</a> i <a href="/wiki/Ohm%C3%ADmetre" title="Ohmímetre">ohmímetre</a>, i d'aquesta idea ve aquest nom, Multímetre, multi, derivat del llatí, de significat moltes, i metre de significat la mesura. Un dels primers aparells que va crear el van anomenar AVO.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Com_mesurar_amb_el_multímetre_digital"><span id="Com_mesurar_amb_el_mult.C3.ADmetre_digital"></span>Com mesurar amb el multímetre digital</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Pol%C3%ADmetre&action=edit&section=3" title="Modifica la secció: Com mesurar amb el multímetre digital"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Mesurant_tensions">Mesurant tensions</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Pol%C3%ADmetre&action=edit&section=4" title="Modifica la secció: Mesurant tensions"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Amb el selector a un voltatge (volts) aproximat o superior a l'esperat i el cable vermell connectat a VΩ, tocar amb les clavilles dos punts d'un circuit tancat (connexió en paral·lel). Si volem mesurar voltage absolut, col·loquem la clavilla negra en qualsevol massa i l'altra en el circuit. Anar baixant el voltatge del selector fins a una lectura superior a la seleccionada. Cal descartar aquesta i utilitzar l'anterior. </p> <div class="mw-heading mw-heading3"><h3 id="Mesurant_resistències"><span id="Mesurant_resist.C3.A8ncies"></span>Mesurant resistències</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Pol%C3%ADmetre&action=edit&section=5" title="Modifica la secció: Mesurant resistències"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Es mesura la resistència d'elements extrets del circuit, sense corrent. Cal col·locar el selector a resistència (ohms) i en l'escala apropiada a la mida de la resistència que volem mesurar. Tocar amb les clavilles els extrems de l'element, amb cura que no hi toquin els dits o qualsevol altra massa. </p> <div class="mw-heading mw-heading3"><h3 id="Mesurant_intensitats">Mesurant intensitats</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Pol%C3%ADmetre&action=edit&section=6" title="Modifica la secció: Mesurant intensitats"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Amb el selector a una intensitat (ampers) aproximada o superior a l'esperada i el cable vermell connectat a mA o 10A, tocar amb les clavilles els dos extrems d'un circuit obert (connexió en sèrie). </p> <div class="mw-heading mw-heading2"><h2 id="Referències"><span id="Refer.C3.A8ncies"></span>Referències</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Pol%C3%ADmetre&action=edit&section=7" title="Modifica la secció: Referències"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="reflist {{#if: | references-column-count references-column-count-{{{col}}}" style="list-style-type: decimal;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">«<a rel="nofollow" class="external text" href="https://www.haikudeck.com/digital-multimeter-education-presentation-ZjhWoFJM4N">Digital Multimeter - A Haiku Deck by Johaen G And Ian H</a>» (en anglès).  René Vilamitjana. [Consulta: 17 febrer 2019].</span></span> </li> </ol></div></div> <style data-mw-deduplicate="TemplateStyles:r33663753">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:#f9f9f9;display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}.mw-parser-output .side-box-center{clear:both;margin:auto}}</style><div class="side-box metadata side-box-right plainlinks"> <div class="side-box-flex"> <div class="side-box-image"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png" decoding="async" width="30" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/45px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/59px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span></div> <div class="side-box-text plainlist">A <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/P%C3%A0gina_principal?uselang=ca">Wikimedia Commons</a></span> hi ha contingut multimèdia relatiu a: <i><b><a href="https://commons.wikimedia.org/wiki/Category:Multimeters" class="extiw" title="commons:Category:Multimeters">Polímetre</a></b></i></div></div> </div> <div role="navigation" class="navbox" aria-label="Navbox" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Control_d%27autoritats" title="Control d'autoritats">Registres d'autoritat</a></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/LCCN" class="mw-redirect" title="LCCN">LCCN</a> <span class="uid"> (<a rel="nofollow" class="external text" href="https://id.loc.gov/authorities/subjects/sh85144328">1</a>)</span></li> <li><a href="/wiki/National_Diet_Library" class="mw-redirect" title="National Diet Library">NDL</a> <span class="uid"> (<a rel="nofollow" class="external text" href="http://id.ndl.go.jp/auth/ndlna/00564614">1</a>)</span></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Obtingut de «<a dir="ltr" href="https://ca.wikipedia.org/w/index.php?title=Polímetre&oldid=34329358">https://ca.wikipedia.org/w/index.php?title=Polímetre&oldid=34329358</a>»</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Especial:Categorias" title="Especial:Categorias">Categoria</a>: <ul><li><a href="/wiki/Categoria:Instruments_de_mesura" title="Categoria:Instruments de mesura">Instruments de mesura</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Categories ocultes: <ul><li><a href="/wiki/Categoria:P%C3%A0gines_amb_enlla%C3%A7_commonscat_des_de_Wikidata" title="Categoria:Pàgines amb enllaç commonscat des de Wikidata">Pàgines amb enllaç commonscat des de Wikidata</a></li><li><a href="/wiki/Categoria:Control_d%27autoritats" title="Categoria:Control d'autoritats">Control d'autoritats</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> La pàgina va ser modificada per darrera vegada el 9 des 2024 a les 15:59.</li> <li id="footer-info-copyright">El text està disponible sota la <a href="/wiki/Viquip%C3%A8dia:Text_de_la_llic%C3%A8ncia_de_Creative_Commons_Reconeixement-Compartir_Igual_4.0_No_adaptada" title="Viquipèdia:Text de la llicència de Creative Commons Reconeixement-Compartir Igual 4.0 No adaptada"> Llicència de Creative Commons Reconeixement i Compartir-Igual</a>; es poden aplicar termes addicionals. 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