{"id":2683,"date":"2022-08-13T13:52:35","date_gmt":"2022-08-13T05:52:35","guid":{"rendered":"https:\/\/sj-gauge.com\/?p=2683"},"modified":"2026-04-25T22:16:55","modified_gmt":"2026-04-25T14:16:55","slug":"dial-thermometer-accuracy","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/vi\/dial-thermometer-accuracy\/","title":{"rendered":"L\u1edbp ch\u00ednh x\u00e1c v\u00e0 gi\u1edbi h\u1ea1n sai s\u1ed1 c\u1ee7a nhi\u1ec7t k\u1ebf kim"},"content":{"rendered":"<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>\u0110\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a nhi\u1ec7t k\u1ebf kim l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng trong c\u00e1c quy tr\u00ecnh c\u00f4ng nghi\u1ec7p v\u00e0 qu\u00e1 tr\u00ecnh ra quy\u1ebft \u0111\u1ecbnh.<\/strong><\/p>\n\n\n\n<p>Tuy nhi\u00ean, b\u01b0\u1edbc quan tr\u1ecdng n\u00e0y th\u01b0\u1eddng b\u1ecb b\u1ecf qua trong vi\u1ec7c s\u1eed d\u1ee5ng h\u00e0ng ng\u00e0y c\u00e1c c\u00f4ng c\u1ee5 \u0111o nhi\u1ec7t \u0111\u1ed9, v\u1edbi nhi\u1ec1u ng\u01b0\u1eddi cho r\u1eb1ng c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9 lu\u00f4n ch\u00ednh x\u00e1c \u2014 m\u1ed9t quan ni\u1ec7m sai l\u1ea7m ph\u1ed5 bi\u1ebfn.<\/p>\n\n\n\n<p>D\u00f9 trong l\u0129nh v\u1ef1c cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng, c\u00f4ng ngh\u1ec7 y t\u1ebf v\u00e0 th\u1ef1c ph\u1ea9m, c\u00f4ng nghi\u1ec7p h\u00f3a ch\u1ea5t v\u00e0 d\u01b0\u1ee3c ph\u1ea9m, hay v\u1eadn t\u1ea3i bi\u1ec3n v\u00e0 \u00f4 t\u00f4, vi\u1ec7c \u0111o l\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u00e1ng tin c\u1eady l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng trong t\u1ea5t c\u1ea3 c\u00e1c quy tr\u00ecnh \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t nghi\u00eam ng\u1eb7t.<\/p>\n\n\n\n<p>N\u1ebfu c\u00f3 nghi ng\u1edd v\u1ec1 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111o nhi\u1ec7t \u0111\u1ed9, ch\u00fang t\u00f4i khuy\u1ebfn ngh\u1ecb n\u00ean hi\u1ec7u chu\u1ea9n ch\u00fang b\u1edfi m\u1ed9t nh\u00e0 cung c\u1ea5p thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng chuy\u00ean nghi\u1ec7p.<\/p>\n\n\n\n<p><strong>B\u1ea1n c\u00f3 quan t\u00e2m \u0111\u1ebfn vi\u1ec7c t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 vi\u1ec7c hi\u1ec7u chu\u1ea9n nhi\u1ec7t k\u1ebf kim?<\/strong><\/p>\n\n\n\n<p>SJ Gauge s\u1ebd gi\u1edbi thi\u1ec7u v\u1ec1 L\u1edbp \u0110\u1ed9 Ch\u00ednh X\u00e1c v\u00e0 Gi\u1edbi H\u1ea1n Sai S\u1ed1 c\u1ee7a nhi\u1ec7t k\u1ebf kim d\u01b0\u1edbi \u0111\u00e2y, gi\u1ea3i th\u00edch l\u00fd do t\u1ea1i sao c\u00e1c thi\u1ebft b\u1ecb \u0111o nhi\u1ec7t \u0111\u1ed9 b\u1eb1ng kim c\u1ea7n \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n. Ch\u00fang t\u00f4i s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u quy tr\u00ecnh hi\u1ec7u chu\u1ea9n th\u00f4ng qua c\u00e1c v\u00ed d\u1ee5 \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 hi\u1ec3u.<\/p>\n\n\n\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin, vui l\u00f2ng ti\u1ebfp t\u1ee5c \u0111\u1ecdc b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i ho\u1eb7c li\u00ean h\u1ec7 tr\u1ef1c ti\u1ebfp v\u1edbi ch\u00fang t\u00f4i. \u0110\u1ed9i ng\u0169 b\u00e1n h\u00e0ng chuy\u00ean nghi\u1ec7p c\u1ee7a ch\u00fang t\u00f4i lu\u00f4n s\u1eb5n s\u00e0ng cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p \u0111o nhi\u1ec7t \u0111\u1ed9 ph\u00f9 h\u1ee3p nh\u1ea5t cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a qu\u00fd kh\u00e1ch!<\/p>\n<\/blockquote>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"B\u1eadt\/t\u1eaft M\u1ee5c l\u1ee5c\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">B\u1eadt\/T\u1eaft<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #7b1e1c;color:#7b1e1c\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #7b1e1c;color:#7b1e1c\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.sj-gauge.com\/vi\/dial-thermometer-accuracy\/#1-what-does-%e2%80%9caccuracy%e2%80%9d-mean-in-dial-thermometers-understanding-the-definitions-of-terms-related-to-temperature-calibration\" >1. \u201c\u0110\u1ed9 ch\u00ednh x\u00e1c\u201d c\u00f3 ngh\u0129a l\u00e0 g\u00ec trong nhi\u1ec7t k\u1ebf kim? Hi\u1ec3u r\u00f5 \u0111\u1ecbnh ngh\u0129a c\u1ee7a c\u00e1c thu\u1eadt ng\u1eef li\u00ean quan \u0111\u1ebfn hi\u1ec7u chu\u1ea9n nhi\u1ec7t \u0111\u1ed9.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.sj-gauge.com\/vi\/dial-thermometer-accuracy\/#2-what-is-temperature-calibration-why-do-thermometers-need-calibration\" >2. Calibration nhi\u1ec7t \u0111\u1ed9 l\u00e0 g\u00ec? T\u1ea1i sao nhi\u1ec7t k\u1ebf c\u1ea7n \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.sj-gauge.com\/vi\/dial-thermometer-accuracy\/#3-how-should-temperature-calibration-be-conducted\" >3. C\u00e1ch th\u1ef1c hi\u1ec7n hi\u1ec7u chu\u1ea9n nhi\u1ec7t \u0111\u1ed9 nh\u01b0 th\u1ebf n\u00e0o?<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-87025ba603ab1861b355e85ef744b865\"><span class=\"ez-toc-section\" id=\"1-what-does-%e2%80%9caccuracy%e2%80%9d-mean-in-dial-thermometers-understanding-the-definitions-of-terms-related-to-temperature-calibration\"><\/span>1. \u201c\u0110\u1ed9 ch\u00ednh x\u00e1c\u201d c\u00f3 ngh\u0129a l\u00e0 g\u00ec trong nhi\u1ec7t k\u1ebf kim? Hi\u1ec3u r\u00f5 \u0111\u1ecbnh ngh\u0129a c\u1ee7a c\u00e1c thu\u1eadt ng\u1eef li\u00ean quan \u0111\u1ebfn hi\u1ec7u chu\u1ea9n nhi\u1ec7t \u0111\u1ed9.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">a. \u0110\u1ed9 ch\u00ednh x\u00e1c<br>\u201c\u0110\u1ed9 ch\u00ednh x\u00e1c\u201d c\u00f3 ngh\u0129a l\u00e0 g\u00ec trong nhi\u1ec7t k\u1ebf kim?<\/h3>\n\n\n\n<p>\u0110\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a nhi\u1ec7t k\u1ebf kim \u0111\u1ed3ng h\u1ed3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 g\u1ea7n \u0111\u00fang ho\u1eb7c sai l\u1ec7ch gi\u1eefa gi\u00e1 tr\u1ecb \u0111o \u0111\u01b0\u1ee3c (gi\u00e1 tr\u1ecb quan s\u00e1t ho\u1eb7c \u0111\u1ecdc \u0111\u01b0\u1ee3c) v\u00e0 gi\u00e1 tr\u1ecb th\u1ef1c c\u1ee7a n\u00f3. \u0110\u01a1n v\u1ecb m\u1eb7c \u0111\u1ecbnh \u0111\u1ec3 ch\u1ec9 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a nhi\u1ec7t k\u1ebf kim \u0111\u1ed3ng h\u1ed3 l\u00e0 \u2103.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">b. L\u1edbp \u0111\u1ed9 ch\u00ednh x\u00e1c<br>\u201cL\u1edbp ch\u00ednh x\u00e1c\u201d c\u00f3 ngh\u0129a l\u00e0 g\u00ec trong nhi\u1ec7t k\u1ebf kim?<\/h3>\n\n\n\n<p>C\u00e1c l\u1edbp ch\u00ednh x\u00e1c \u0111\u01b0\u1ee3c chia th\u00e0nh L\u1edbp 1 v\u00e0 L\u1edbp 2 theo ti\u00eau chu\u1ea9n BS EN13190:2001 (Ti\u00eau chu\u1ea9n Anh). C\u00e1c d\u1ea3i nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau (d\u1ea3i \u0111o nhi\u1ec7t \u0111\u1ed9) v\u00e0 \u0111\u01b0\u1eddng k\u00ednh m\u1eb7t s\u1ed1 t\u01b0\u01a1ng \u1ee9ng v\u1edbi c\u00e1c l\u1edbp ch\u00ednh x\u00e1c kh\u00e1c nhau.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">c. Gi\u1edbi h\u1ea1n sai s\u1ed1<\/h3>\n\n\n\n<p>C\u00e1c gi\u00e1 tr\u1ecb ph\u1ea3i n\u1eb1m trong ph\u1ea1m vi sai s\u1ed1 cho ph\u00e9p, \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh d\u1ef1a tr\u00ean ph\u1ea1m vi danh \u0111\u1ecbnh v\u00e0 ph\u1ea1m vi \u0111o l\u01b0\u1eddng trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau, k\u00e8m theo c\u00e1c l\u1edbp ch\u00ednh x\u00e1c v\u00e0 gi\u1edbi h\u1ea1n sai s\u1ed1 t\u01b0\u01a1ng \u1ee9ng.<\/p>\n\n\n\n<p>D\u1ea3i \u0111o \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh d\u1ef1a tr\u00ean c\u00e1c nhi\u1ec7t \u0111\u1ed9 th\u00f4ng d\u1ee5ng trong \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n. D\u1ea3i \u0111o n\u00e0y n\u00ean k\u00e9o d\u00e0i \u00edt nh\u1ea5t hai ph\u1ea7n ba k\u00edch th\u01b0\u1edbc c\u1ee7a \u0111\u1ed3ng h\u1ed3, \u0111\u1ea3m b\u1ea3o r\u1eb1ng d\u1ea3i \u0111o c\u1ee7a b\u1ea1n kh\u00f4ng bao gi\u1edd v\u01b0\u1ee3t qu\u00e1 d\u1ea3i danh \u0111\u1ecbnh.<\/p>\n\n\n\n<p>Ti\u00eau chu\u1ea9n BS EN13190:2001 cung c\u1ea5p b\u1ea3ng sau \u0111\u00e2y:<\/p>\n\n\n\n<figure class=\"wp-block-flexible-table-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td rowspan=\"2\">Ph\u1ea1m vi danh ngh\u0129a \u2103<\/td><td rowspan=\"2\">D\u1ea3i \u0111o \u2103<\/td><td colspan=\"2\">Gi\u1edbi h\u1ea1n sai s\u1ed1 \u00b1 \u2103<\/td><\/tr><tr><td>L\u1edbp 1<\/td><td>L\u1edbp 2<\/td><\/tr><tr><td>-20 \u2026 +40<br>-20 \u2026 +60<br>-20 \u2026 +120<\/td><td>-10 \u2026 +30<br>-10 \u2026 +50<br>-10 \u2026 +110<\/td><td>1<br>1<br>2<\/td><td>2<br>2<br>4<\/td><\/tr><tr><td>-30 \u2026 +30<br>-30 \u2026 +50<br>-30 \u2026 +70<\/td><td>-20 \u2026 +20<br>-20 \u2026 +40<br>-20 \u2026 +60<\/td><td>1<br>1<br>1<\/td><td>2<br>2<br>2<\/td><\/tr><tr><td>-40 \u2026 +40<br>-40 \u2026 +60<br>-100 \u2026 +60<\/td><td>-30 \u2026 +30<br>-30 \u2026 +50<br>-80 \u2026 +40<\/td><td>1<br>1<br>2<\/td><td>2<br>2<br>4<\/td><\/tr><tr><td>0 \u2026 60<br>0 \u2026 80<br>0 \u2026 100<\/td><td>10 \u2026 50<br>10 \u2026 70<br>10 \u2026 90<\/td><td>1<br>1<br>1<\/td><td>2<br>2<br>2<\/td><\/tr><tr><td>0 \u2026 120<br>0 \u2026 160<br>0 \u2026 200<\/td><td>10 \u2026 110<br>20 \u2026 140<br>20 \u2026 180<\/td><td>2<br>2<br>2<\/td><td>4<br>4<br>4<\/td><\/tr><tr><td>0 \u2026 250<br>0 \u2026 300<br>0 \u2026 400<\/td><td>30 \u2026 220<br>30 \u2026 270<br>50 \u2026 350<\/td><td>2.5<br>5<br>5<\/td><td>5<br>10<br>10<\/td><\/tr><tr><td>0 \u2026 500<br>0 \u2026 600<br>0 \u2026 700<\/td><td>50 \u2026 450<br>100 \u2026 500<br>100 \u2026 600<\/td><td>5<br>10<br>10<\/td><td>10<br>15<br>15<\/td><\/tr><tr><td>50 \u2026 650<br>100 \u2026 700<\/td><td>150 \u2026 550<br>200 \u2026 600<\/td><td>10<br>10<\/td><td>15<br>15<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>*D\u1ea3i \u0111o ph\u1ea3i bao ph\u1ee7 \u00edt nh\u1ea5t hai ph\u1ea7n ba d\u1ea3i danh \u0111\u1ecbnh.<br>N\u1ebfu ph\u1ea1m vi danh ngh\u0129a v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n tr\u00ean, n\u00ean \u00e1p d\u1ee5ng ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 ti\u1ebfp theo.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5,<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>D\u1ea3i nhi\u1ec7t \u0111\u1ed9 danh \u0111\u1ecbnh: 0 \u2026 100 \u00b0C<\/li>\n\n\n\n<li>D\u1ea3i \u0111o: 10 \u2026 90 \u00b0C<\/li>\n<\/ul>\n\n\n\n<p>Theo b\u1ea3ng tr\u00ean, c\u00e1c gi\u00e1 tr\u1ecb nh\u01b0 sau:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Gi\u1edbi h\u1ea1n sai s\u1ed1: \u00b1 1 \u2103<\/h4>\n\n\n\n<p>\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 khi nhi\u1ec7t \u0111\u1ed9 th\u1ef1c t\u1ebf l\u00e0 20 \u2103, gi\u1edbi h\u1ea1n sai s\u1ed1 n\u1eb1m trong kho\u1ea3ng t\u1eeb 19 \u2026 21 \u2103.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Gi\u1edbi h\u1ea1n sai s\u1ed1 c\u1ee7a l\u1edbp 2: \u00b1 2 \u2103<\/h4>\n\n\n\n<p>\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 khi nhi\u1ec7t \u0111\u1ed9 th\u1ef1c t\u1ebf l\u00e0 20 \u2103, gi\u1edbi h\u1ea1n sai s\u1ed1 n\u1eb1m trong kho\u1ea3ng t\u1eeb 18 \u2026 22 \u2103.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-bb934367d7315bdead77fd60ffc892c2\"><span class=\"ez-toc-section\" id=\"2-what-is-temperature-calibration-why-do-thermometers-need-calibration\"><\/span>2. Calibration nhi\u1ec7t \u0111\u1ed9 l\u00e0 g\u00ec? T\u1ea1i sao nhi\u1ec7t k\u1ebf c\u1ea7n \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ea1i sao nhi\u1ec7t k\u1ebf c\u1ea7n \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n?<\/h3>\n\n\n\n<p>\u0110\u1ea3m b\u1ea3o \u0111o l\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 ch\u00ednh x\u00e1c l\u00e0 y\u1ebfu t\u1ed1 c\u1ea7n thi\u1ebft \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1ea3n xu\u1ea5t, gi\u1ea3m thi\u1ec3u nguy c\u01a1 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng mong mu\u1ed1n v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n m\u00f4i tr\u01b0\u1eddng c\u0169ng nh\u01b0 ph\u00e1p l\u00fd \u2014, t\u1eeb \u0111\u00f3 mang l\u1ea1i l\u1ee3i nhu\u1eadn t\u1ed1i \u01b0u.<\/p>\n\n\n\n<p>Ngay c\u1ea3 v\u1edbi c\u00e1c thi\u1ebft b\u1ecb \u0111o nhi\u1ec7t \u0111\u1ed9 ch\u1ea5t l\u01b0\u1ee3ng cao nh\u1ea5t, \u0111\u1ed9 ch\u00ednh x\u00e1c c\u00f3 th\u1ec3 gi\u1ea3m theo th\u1eddi gian. Vi\u1ec7c ki\u1ec3m tra v\u00e0 hi\u1ec7u chu\u1ea9n \u0111\u1ecbnh k\u1ef3 \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 tin c\u1eady c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n\n\n\n<p>Ngo\u00e0i ra, c\u00e1c thi\u1ebft b\u1ecb \u0111o nhi\u1ec7t \u0111\u1ed9 th\u01b0\u1eddng \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb hi\u1ec7u chu\u1ea9n h\u00e0ng n\u0103m.<\/p>\n\n\n\n<p>B\u1ea5t k\u1ef3 t\u00ecnh hu\u1ed1ng n\u00e0o n\u00eau tr\u00ean \u0111\u1ec1u c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn d\u1eef li\u1ec7u quan s\u00e1t sai l\u1ec7ch. Ch\u00fang t\u00f4i khuy\u1ebfn ngh\u1ecb kh\u00e1ch h\u00e0ng n\u00ean g\u1eedi c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ebfn nh\u00e0 cung c\u1ea5p \u0111\u00e1ng tin c\u1eady nh\u01b0 SJ Gauge \u0111\u1ec3 hi\u1ec7u chu\u1ea9n \u00e1p su\u1ea5t v\u00e0 b\u1ea3o tr\u00ec.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-3a4d720e17dc2eb181dc392077d09e4d\"><span class=\"ez-toc-section\" id=\"3-how-should-temperature-calibration-be-conducted\"><\/span>3. C\u00e1ch th\u1ef1c hi\u1ec7n hi\u1ec7u chu\u1ea9n nhi\u1ec7t \u0111\u1ed9 nh\u01b0 th\u1ebf n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Hi\u1ec7p h\u1ed9i Ti\u00eau chu\u1ea9n Anh (British Standards Institution) khuy\u1ebfn ngh\u1ecb r\u1eb1ng vi\u1ec7c ki\u1ec3m tra n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng m\u1ed9t thi\u1ebft b\u1ecb ki\u1ec3m tra c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c \u00edt nh\u1ea5t g\u1ea5p b\u1ed1n l\u1ea7n so v\u1edbi nhi\u1ec7t k\u1ebf \u0111ang \u0111\u01b0\u1ee3c ki\u1ec3m tra. Thi\u1ebft b\u1ecb ki\u1ec3m tra ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c \u0111\u1ebfn Ph\u00f2ng Th\u00ed nghi\u1ec7m Ti\u00eau chu\u1ea9n \u0110o l\u01b0\u1eddng Qu\u1ed1c gia \u2013 H\u1ec7 th\u1ed1ng Truy xu\u1ea5t Ngu\u1ed3n g\u1ed1c \u0110o l\u01b0\u1eddng.<\/p>\n\n\n\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ba ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra th\u00f4ng d\u1ee5ng \u0111\u1ec3 hi\u1ec7u chu\u1ea9n nhi\u1ec7t k\u1ebf kim theo ti\u00eau chu\u1ea9n BS EN 13190-2001:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Ph\u1ea7n t\u1eed c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9 \u0111ang \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m ph\u1ea3i \u0111\u01b0\u1ee3c ti\u1ebfp x\u00fac trong 20 ph\u00fat v\u1edbi nhi\u1ec7t \u0111\u1ed9 t\u01b0\u01a1ng \u1ee9ng v\u1edbi gi\u00e1 tr\u1ecb t\u1ed1i \u0111a tr\u00ean thang \u0111o c\u1ee7a n\u00f3, ho\u1eb7c +60 \u2103, t\u00f9y theo gi\u00e1 tr\u1ecb n\u00e0o l\u1edbn h\u01a1n.<\/li>\n\n\n\n<li>Thermometer ph\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m tra \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed9 tr\u1ec5 nhi\u1ec7t b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng \u00edt nh\u1ea5t ba nhi\u1ec7t \u0111\u1ed9 \u0111\u01b0\u1ee3c ch\u1ecdn c\u00e1ch \u0111\u1ec1u nhau trong ph\u1ea1m vi \u0111o. Th\u1eed nghi\u1ec7m ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong \u0111i\u1ec1u ki\u1ec7n tham chi\u1ebfu, c\u1ea3 \u1edf ph\u00eda tr\u00ean v\u00e0 ph\u00eda d\u01b0\u1edbi thang \u0111o.<\/li>\n\n\n\n<li>Trong tr\u01b0\u1eddng h\u1ee3p c\u00e1c nhi\u1ec7t k\u1ebf c\u00f3 th\u1ec3 l\u1eafp \u0111\u1eb7t \u1edf b\u1ea5t k\u1ef3 g\u00f3c \u0111\u1ed9 n\u00e0o, s\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a ch\u1ec9 s\u1ed1 khi nhi\u1ec7t k\u1ebf \u0111\u01b0\u1ee3c xoay 90 \u0111\u1ed9 theo tr\u1ee5c d\u1ecdc v\u00e0 tr\u1ee5c ngang c\u1ee7a n\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh.<\/li>\n<\/ol>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>\u0110\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a nhi\u1ec7t k\u1ebf kim l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng trong c\u00e1c quy tr\u00ecnh c\u00f4ng nghi\u1ec7p v\u00e0 qu\u00e1 tr\u00ecnh ra quy\u1ebft \u0111\u1ecbnh. Tuy nhi\u00ean, b\u01b0\u1edbc quan tr\u1ecdng n\u00e0y th\u01b0\u1eddng b\u1ecb b\u1ecf qua trong vi\u1ec7c s\u1eed d\u1ee5ng h\u00e0ng ng\u00e0y c\u00e1c c\u00f4ng c\u1ee5 \u0111o nhi\u1ec7t \u0111\u1ed9, v\u1edbi nhi\u1ec1u ng\u01b0\u1eddi cho r\u1eb1ng c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9 lu\u00f4n ch\u00ednh x\u00e1c \u2014 m\u1ed9t quan ni\u1ec7m sai l\u1ea7m ph\u1ed5 bi\u1ebfn. D\u00f9 trong l\u0129nh v\u1ef1c cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng, c\u00f4ng ngh\u1ec7 y t\u1ebf v\u00e0 th\u1ef1c ph\u1ea9m, c\u00f4ng nghi\u1ec7p h\u00f3a ch\u1ea5t v\u00e0 d\u01b0\u1ee3c ph\u1ea9m, hay v\u1eadn t\u1ea3i v\u00e0 \u00f4 t\u00f4, [\u2026]<\/p>","protected":false},"author":2,"featured_media":2684,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[72],"class_list":["post-2683","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-temperature"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>The Accuracy Class and Limits of Error of Dial Thermometers - SJ Gauge | Pressure Gauges, Thermometers &amp; Pressure Sensors<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sj-gauge.com\/vi\/dial-thermometer-accuracy\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Accuracy Class and Limits of Error of Dial Thermometers\" \/>\n<meta property=\"og:description\" content=\"The accuracy of dial thermometers is crucial in industrial processes and decision-making. 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