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[o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Logga in</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"> Sidor för utloggade redigerare <a href="/wiki/Hj%C3%A4lp:Introduktion" aria-label="Läs mer om redigering"><span>läs mer</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/Special:Mina_bidrag" title="En lista över redigeringar från denna IP-adress [y]" accesskey="y"><span>Bidrag</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:Min_diskussion" title="Diskussion om redigeringar från det här IP-numret [n]" accesskey="n"><span>Diskussion</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="Webbplats"> <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="Innehåll" 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">Innehåll</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">flytta till sidofältet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">dölj</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">Inledning</div> </a> </li> <li id="toc-Att_mäta_tid" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Att_mäta_tid"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Att mäta tid</span> </div> </a> <ul id="toc-Att_mäta_tid-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mätinstrument" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Mätinstrument"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Mätinstrument</span> </div> </a> <ul id="toc-Mätinstrument-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Se_även" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Se_även"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Se även</span> </div> </a> <ul id="toc-Se_även-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referenser" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referenser"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Referenser</span> </div> </a> <ul id="toc-Referenser-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Externa_länkar" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Externa_länkar"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Externa länkar</span> </div> </a> <ul id="toc-Externa_länkar-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="Innehåll" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Innehållsförteckning" > <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="Växla innehållsförteckningen" > <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">Växla innehållsförteckningen</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">Tidmätning</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="Gå till en artikel på ett annat språk. Tillgänglig på 23 språk" > <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-23" 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">23 språk</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Cronometria" title="Cronometria – katalanska" lang="ca" hreflang="ca" data-title="Cronometria" data-language-autonym="Català" data-language-local-name="katalanska" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/M%C4%9B%C5%99en%C3%AD_%C4%8Dasu" title="Měření času – tjeckiska" lang="cs" hreflang="cs" data-title="Měření času" data-language-autonym="Čeština" data-language-local-name="tjeckiska" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D8%B9%D8%A8%D8%A7%D8%B1_%D8%AF_%D8%A7%D9%84%D8%B2%D9%85%D8%A7%D9%86" title="عبار د الزمان – marockansk arabiska" lang="ary" hreflang="ary" data-title="عبار د الزمان" data-language-autonym="الدارجة" data-language-local-name="marockansk arabiska" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Zeitmessung" title="Zeitmessung – tyska" lang="de" hreflang="de" data-title="Zeitmessung" data-language-autonym="Deutsch" data-language-local-name="tyska" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Aja_m%C3%B5%C3%B5tmine" title="Aja mõõtmine – estniska" lang="et" hreflang="et" data-title="Aja mõõtmine" data-language-autonym="Eesti" data-language-local-name="estniska" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Chronometry" title="Chronometry – engelska" lang="en" hreflang="en" data-title="Chronometry" data-language-autonym="English" data-language-local-name="engelska" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Cronometr%C3%ADa" title="Cronometría – spanska" lang="es" hreflang="es" data-title="Cronometría" data-language-autonym="Español" data-language-local-name="spanska" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Tempomezurado" title="Tempomezurado – esperanto" lang="eo" hreflang="eo" data-title="Tempomezurado" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B2%D9%85%D8%A7%D9%86%E2%80%8C%D8%B3%D9%86%D8%AC%DB%8C" title="زمان‌سنجی – persiska" lang="fa" hreflang="fa" data-title="زمان‌سنجی" data-language-autonym="فارسی" data-language-local-name="persiska" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Chronom%C3%A9trie" title="Chronométrie – franska" lang="fr" hreflang="fr" data-title="Chronométrie" data-language-autonym="Français" data-language-local-name="franska" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Kronometri" title="Kronometri – indonesiska" lang="id" hreflang="id" data-title="Kronometri" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiska" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Chronometria" title="Chronometria – interlingua" lang="ia" hreflang="ia" data-title="Chronometria" data-language-autonym="Interlingua" data-language-local-name="interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9E%D7%93%D7%99%D7%93%D7%94_%D7%95%D7%A6%D7%99%D7%95%D7%9F_%D7%A9%D7%9C_%D7%96%D7%9E%D7%9F" title="מדידה וציון של זמן – hebreiska" lang="he" hreflang="he" data-title="מדידה וציון של זמן" data-language-autonym="עברית" data-language-local-name="hebreiska" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A5%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%98%D0%B0" title="Хронометрија – makedonska" lang="mk" hreflang="mk" data-title="Хронометрија" data-language-autonym="Македонски" data-language-local-name="makedonska" 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%95%E0%B5%8D%E0%B4%B0%E0%B5%8B%E0%B4%A3%E0%B5%8B%E0%B4%AE%E0%B5%86%E0%B4%9F%E0%B5%8D%E0%B4%B0%E0%B4%BF" title="ക്രോണോമെട്രി – malayalam" lang="ml" hreflang="ml" data-title="ക്രോണോമെട്രി" data-language-autonym="മലയാളം" data-language-local-name="malayalam" 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/Kronometri" title="Kronometri – malajiska" lang="ms" hreflang="ms" data-title="Kronometri" data-language-autonym="Bahasa Melayu" data-language-local-name="malajiska" 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/Tijdmeting" title="Tijdmeting – nederländska" lang="nl" hreflang="nl" data-title="Tijdmeting" data-language-autonym="Nederlands" data-language-local-name="nederländska" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Kronometri" title="Kronometri – norskt bokmål" lang="nb" hreflang="nb" data-title="Kronometri" data-language-autonym="Norsk bokmål" data-language-local-name="norskt bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Kronometri" title="Kronometri – nynorska" lang="nn" hreflang="nn" data-title="Kronometri" data-language-autonym="Norsk nynorsk" data-language-local-name="nynorska" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Cronometragem" title="Cronometragem – portugisiska" lang="pt" hreflang="pt" data-title="Cronometragem" data-language-autonym="Português" data-language-local-name="portugisiska" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%A5%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%8F" title="Хронометрия – tatariska" lang="tt" hreflang="tt" data-title="Хронометрия" data-language-autonym="Татарча / tatarça" data-language-local-name="tatariska" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Zaman%C4%B1n_%C3%B6l%C3%A7%C3%BClmesi" title="Zamanın ölçülmesi – turkiska" lang="tr" hreflang="tr" data-title="Zamanın ölçülmesi" data-language-autonym="Türkçe" data-language-local-name="turkiska" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E8%AE%A1%E6%97%B6%E5%AD%A6" title="计时学 – kinesiska" lang="zh" hreflang="zh" data-title="计时学" data-language-autonym="中文" data-language-local-name="kinesiska" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q186398#sitelinks-wikipedia" title="Redigera interwikilänkar" class="wbc-editpage">Redigera länkar</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namnrymder"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Tidm%C3%A4tning" title="Visa innehållssidan [c]" accesskey="c"><span>Artikel</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Diskussion:Tidm%C3%A4tning&action=edit&redlink=1" rel="discussion" class="new" title="Diskussion om innehållssidan [inte skriven än] [t]" accesskey="t"><span>Diskussion</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Ändra språkvariant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">svenska</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Visningar"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Tidm%C3%A4tning"><span>Läs</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Tidm%C3%A4tning&veaction=edit" title="Redigera denna sida [v]" accesskey="v"><span>Redigera</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Tidm%C3%A4tning&action=edit" title="Redigera wikitexten för den här sidan [e]" accesskey="e"><span>Redigera wikitext</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Tidm%C3%A4tning&action=history" title="Tidigare versioner av sidan [h]" accesskey="h"><span>Visa historik</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Sidverktyg"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Verktyg" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Verktyg</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Verktyg</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">flytta till sidofältet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">dölj</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Fler alternativ" > <div class="vector-menu-heading"> Åtgärder </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Tidm%C3%A4tning"><span>Läs</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Tidm%C3%A4tning&veaction=edit" title="Redigera denna sida [v]" accesskey="v"><span>Redigera</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Tidm%C3%A4tning&action=edit" title="Redigera wikitexten för den här sidan [e]" accesskey="e"><span>Redigera wikitext</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Tidm%C3%A4tning&action=history"><span>Visa historik</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Allmänt </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:L%C3%A4nkar_hit/Tidm%C3%A4tning" title="Lista över alla wikisidor som länkar hit [j]" accesskey="j"><span>Sidor som länkar hit</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:Senaste_relaterade_%C3%A4ndringar/Tidm%C3%A4tning" rel="nofollow" title="Visa senaste ändringarna av sidor som den här sidan länkar till [k]" accesskey="k"><span>Relaterade ändringar</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Tidm%C3%A4tning&oldid=49801258" title="Permanent länk till den här versionen av sidan"><span>Permanent länk</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Tidm%C3%A4tning&action=info" title="Mer information om denna sida"><span>Sidinformation</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:Citera&page=Tidm%C3%A4tning&id=49801258&wpFormIdentifier=titleform" title="Information om hur den här artikeln kan användas som referens"><span>Använd som referens</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fsv.wikipedia.org%2Fwiki%2FTidm%25C3%25A4tning"><span>Hämta förkortad url</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fsv.wikipedia.org%2Fwiki%2FTidm%25C3%25A4tning"><span>Ladda ner QR-kod</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"> Skriv ut/exportera </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=Special:Bok&bookcmd=book_creator&referer=Tidm%C3%A4tning"><span>Skapa en bok</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=Tidm%C3%A4tning&action=show-download-screen"><span>Ladda ned som PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Tidm%C3%A4tning&printable=yes" title="Utskriftsvänlig version av den här sidan [p]" accesskey="p"><span>Utskriftsvänlig version</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"> På andra projekt </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:Timekeeping" 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/Q186398" title="Länk till anslutet databasobjekt [g]" accesskey="g"><span>Wikidata-objekt</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div 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style="background:#F2E0CE; padding: 3px 5px 3px 5px; font-size:larger;">Tidmätning </th></tr> <tr> <td style="font-size:100% !important; padding:0 5px 0 5px;"> <figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/Fil:Rystad_Sand-glass.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/db/Rystad_Sand-glass.jpg/250px-Rystad_Sand-glass.jpg" decoding="async" width="250" height="290" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/db/Rystad_Sand-glass.jpg/375px-Rystad_Sand-glass.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/db/Rystad_Sand-glass.jpg/500px-Rystad_Sand-glass.jpg 2x" data-file-width="1028" data-file-height="1191" /></a><figcaption></figcaption></figure> <div class="center" style="width:auto; margin-left:auto; margin-right:auto;"><a href="/wiki/Timglas" title="Timglas">Timglas</a> i <a href="/wiki/Rystad_kyrka" class="mw-redirect" title="Rystad kyrka">Rystad kyrka</a>.</div> <hr /> <ul><li><b>Betydelse</b> – <a href="/wiki/M%C3%A4tning" title="Mätning">mätning</a> av <a href="/wiki/Tid" title="Tid">tid</a></li> <li><b>Hjälpmedel</b> – <a href="/wiki/Almanacka" title="Almanacka">almanacka</a>, <a href="/wiki/Kalender" title="Kalender">kalender</a>, <a href="/wiki/Kronometer" title="Kronometer">kronometer</a>, <a href="/wiki/Solur" title="Solur">solur</a>, <a href="/wiki/Ur" title="Ur">ur</a></li> <li><b>Relaterat begrepp</b> – <a href="/wiki/Tidm%C3%A4tningens_historia" title="Tidmätningens historia">tidmätningens historia</a></li></ul> </td></tr></tbody></table></div> <p><b>Tidmätning</b> – <a href="/wiki/M%C3%A4tning" title="Mätning">mätning</a> av <a href="/wiki/Tid" title="Tid">tid</a> – sker vanligen med olika typer av <a href="/wiki/Ur" title="Ur">ur</a>. Man kan även lista tidens förlopp med hjälp av <a href="/wiki/Kalender" title="Kalender">kalendrar</a> och <a href="/wiki/Almanacka" title="Almanacka">almanackor</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Att_mäta_tid"><span id="Att_m.C3.A4ta_tid"></span>Att mäta tid</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tidm%C3%A4tning&veaction=edit&section=1" title="Redigera avsnitt: Att mäta tid" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Tidm%C3%A4tning&action=edit&section=1" title="Redigera avsnitts källkod: Att mäta tid"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <dl><dd><div class="noprint hatnote"><i>Fördjupning: <a href="/wiki/Tidm%C3%A4tningens_historia" title="Tidmätningens historia">Tidmätningens historia</a></i></div></dd></dl> <p>Att mäta tid handlar om att mäta upp antalet perioder i ett cykliskt förlopp, mellan inledningen av ett skeende och dess slut. Denna uppmätning kan vara mer eller mindre noggrann, beroende på hur välkänd cykelns tidsåtgång är och hur noga man kan avgränsa start- och slutpunkterna. Cykliska förlopp kan här vara omloppen för himlakroppar, ett pendelurs svängningar, hur perioden för elektrisk svängningskrets i ett <a href="/wiki/Oscilloskop" title="Oscilloskop">oscilloskop</a> kan definieras och <a href="/wiki/Mikrov%C3%A5gor" title="Mikrovågor">mikrovågor</a> hos en <a href="/wiki/Cesium" title="Cesium">cesiumatom</a>.<sup id="cite_ref-:0_1-0" class="reference"><a href="#cite_note-:0-1"><span class="cite-reference-link-bracket">[</span>1<span class="cite-reference-link-bracket">]</span></a></sup> </p><p>Mänskligheten har uppfunnit ett otal olika <a href="/wiki/Kalender" title="Kalender">kalendrar</a> för att hålla reda på <a href="/wiki/Dag" title="Dag">dagarnas</a>, <a href="/wiki/Vecka" title="Vecka">veckornas</a>, <a href="/wiki/M%C3%A5nad" title="Månad">månadernas</a> och årens gång. </p><p>Tid kan mätas, liksom andra fysikaliska <a href="/wiki/Dimension" title="Dimension">dimensioner</a>. <a href="/wiki/SI-enhet" title="SI-enhet">SI-enheten</a> för tid är <a href="/wiki/Sekund" title="Sekund">sekund</a>, utifrån vilken längre enheter är definierade som <a href="/wiki/Minut" title="Minut">minut</a>, <a href="/wiki/Kvart_(tid)" title="Kvart (tid)">kvart</a>, <a href="/wiki/Timme" title="Timme">timme</a>, <a href="/wiki/Dag" title="Dag">dag</a>, <a href="/wiki/Vecka" title="Vecka">vecka</a>, <a href="/wiki/M%C3%A5nad" title="Månad">månad</a>, <a href="/wiki/%C3%85r" title="År">år</a>, <a href="/wiki/Decennium" title="Decennium">decennium</a>, <a href="/wiki/Sekel" title="Sekel">sekel</a>, <a href="/wiki/Millennium" title="Millennium">millennium</a>. </p><p>Tiden går också att mäta åt andra hållet, med enheterna decisekund, centisekund, millisekund och så vidare. Dessa kallas oftast tiondels sekund, hundradels sekund med mera, och därför är begreppen relativt okända. </p><p>1 sekund definieras i Internationella måttenhetssystemet som tiden för 9 192 631 770 perioder av den strålning som motsvarar en övergång mellan två energinivåer i grundtillståndet av isotopen <a href="/wiki/Cesium" title="Cesium">cesium</a>-133. </p><p>Det används flera olika kontinuerliga <a href="/w/index.php?title=Tidsskala&action=edit&redlink=1" class="new" title="Tidsskala [inte skriven än]">tidsskalor</a>: <a href="/wiki/Universell_tid" title="Universell tid">Universell tid</a>, <a href="/wiki/Internationell_atomtid" title="Internationell atomtid">Internationell atomtid</a> (TAI; basen för andra tidsskalor), <a href="/wiki/Koordinerad_universell_tid" title="Koordinerad universell tid">Koordinerad universell tid</a> (UTC; standard för vardaglig tid<sup id="cite_ref-:0_1-1" class="reference"><a href="#cite_note-:0-1"><span class="cite-reference-link-bracket">[</span>1<span class="cite-reference-link-bracket">]</span></a></sup>), <a href="/w/index.php?title=Jordtid&action=edit&redlink=1" class="new" title="Jordtid [inte skriven än]">jordtid</a> (TT) med mera. </p> <div class="mw-heading mw-heading2"><h2 id="Mätinstrument"><span id="M.C3.A4tinstrument"></span>Mätinstrument</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tidm%C3%A4tning&veaction=edit&section=2" title="Redigera avsnitt: Mätinstrument" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Tidm%C3%A4tning&action=edit&section=2" title="Redigera avsnitts källkod: Mätinstrument"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>En mätanordning för tid kallas klocka eller <a href="/wiki/Ur" title="Ur">ur</a>. En noggrann klocka kallas <a href="/wiki/Kronometer" title="Kronometer">kronometer</a>. Den allra noggrannaste klockan är ett så kallat <a href="/wiki/Atomur" title="Atomur">atomur</a>, och atomuret NIST 7 har en felmarginal på 1 sekunder per 3 miljoner år.<sup id="cite_ref-:0_1-2" class="reference"><a href="#cite_note-:0-1"><span class="cite-reference-link-bracket">[</span>1<span class="cite-reference-link-bracket">]</span></a></sup> Tillverkning av tidmätare kallas <a href="/wiki/Gnomonik" title="Gnomonik">gnomonik</a>. </p><p>De äldsta mätanordningarna var <a href="/wiki/Gnomon" title="Gnomon">gnomon</a> och <a href="/wiki/Vattenur" title="Vattenur">vattenur</a>, som man räknar med har funnits i enklare former redan för över 4 000 år sedan. <a href="/wiki/Solur" title="Solur">Solur</a><sup id="cite_ref-:0_1-3" class="reference"><a href="#cite_note-:0-1"><span class="cite-reference-link-bracket">[</span>1<span class="cite-reference-link-bracket">]</span></a></sup> utvecklades ur gnomonen. Principen för <a href="/wiki/Timglas" title="Timglas">timglas</a> torde ha varit känd sedan länge, men det är först på <a href="/wiki/Medeltiden" title="Medeltiden">medeltiden</a> som bevis finns för att de verkligen användes. <a href="/wiki/Pendelur" title="Pendelur">Pendelur</a>, <a href="/wiki/Kvartsur" title="Kvartsur">kvartsur</a>, <a href="/wiki/Armbandsur" title="Armbandsur">armbandsur</a>, <a href="/wiki/Fickur" title="Fickur">fickur</a>, <a href="/wiki/V%C3%A4ckarur" class="mw-redirect" title="Väckarur">väckarur</a> är modernare mekaniska varianter. </p> <div class="mw-heading mw-heading2"><h2 id="Se_även"><span id="Se_.C3.A4ven"></span>Se även</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tidm%C3%A4tning&veaction=edit&section=3" title="Redigera avsnitt: Se även" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Tidm%C3%A4tning&action=edit&section=3" title="Redigera avsnitts källkod: Se även"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Sexagesimala_talsystemet" title="Sexagesimala talsystemet">Sexagesimala talsystemet</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Referenser">Referenser</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tidm%C3%A4tning&veaction=edit&section=4" title="Redigera avsnitt: Referenser" class="mw-editsection-visualeditor"><span>redigera</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Tidm%C3%A4tning&action=edit&section=4" title="Redigera avsnitts källkod: Referenser"><span>redigera wikitext</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-:0-1">^ [<a href="#cite_ref-:0_1-0"><small>a</small></a> <a href="#cite_ref-:0_1-1"><small>b</small></a> <a href="#cite_ref-:0_1-2"><small>c</small></a> <a href="#cite_ref-:0_1-3"><small>d</small></a>] <span class="reference-text"><cite style="font-style:normal" class="web"><a rel="nofollow" class="external text" href="https://www.ne.se/uppslagsverk/encyklopedi/l%C3%A5ng/tidm%C3%A4tning">”tidmätning”</a>. ne.se<span class="printonly">. <a rel="nofollow" class="external free" href="https://www.ne.se/uppslagsverk/encyklopedi/l%C3%A5ng/tidm%C3%A4tning">https://www.ne.se/uppslagsverk/encyklopedi/l%C3%A5ng/tidm%C3%A4tning</a></span><span class="reference-accessdate">. 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title="Efemerid">Efemeridtid</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Geologisk_tidsskala" title="Geologisk tidsskala">Geologisk tidsskala</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Greenwich_Mean_Time" title="Greenwich Mean Time">Greenwich Mean Time</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Internationell_atomtid" title="Internationell atomtid">Internationell atomtid</a> (TAI)<span style="font-weight:bold;"> · </span> <a href="/wiki/Koordinerad_universell_tid" title="Koordinerad universell tid">Koordinerad universell tid</a> (UTC)<span style="font-weight:bold;"> · </span> <a href="/wiki/Normaltid" title="Normaltid">Normaltid</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Sommartid" title="Sommartid">Sommartid</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Soltid" title="Soltid">Soltid</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Tider%C3%A4kning" title="Tideräkning">Tideräkning</a><span style="font-weight:bold;"> · </span> <a href="/wiki/M%C3%A5nvarv" title="Månvarv">Månvarv</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Stj%C3%A4rntid" title="Stjärntid">Stjärntid</a><span style="font-weight:bold;"> · </span> <a href="/wiki/Tidszon" title="Tidszon">Tidszon</a><span style="font-weight:bold;"> · </span> <a href="/wiki/V%C3%A4rldstid" class="mw-redirect" title="Världstid">Världstid</a></div></td><td style="width:0%;padding:0px 0px 0px 2px;" rowspan="7"><span typeof="mw:File"><a href="/wiki/Fil:Wooden_hourglass_3.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Wooden_hourglass_3.jpg/40px-Wooden_hourglass_3.jpg" decoding="async" width="40" height="81" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Wooden_hourglass_3.jpg/60px-Wooden_hourglass_3.jpg 1.5x, 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