{"id":5605,"date":"2026-08-13T18:14:26","date_gmt":"2026-08-13T10:14:26","guid":{"rendered":"https:\/\/www.sj-gauge.com\/?p=5605"},"modified":"2026-08-13T20:53:31","modified_gmt":"2026-08-13T12:53:31","slug":"industrial-thermometer-inaccurate-reading","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/vi\/industrial-thermometer-inaccurate-reading\/","title":{"rendered":"Nhi\u1ec7t k\u1ebf c\u00f4ng nghi\u1ec7p hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3 kh\u00f4ng ch\u00ednh x\u00e1c? Ki\u1ec3m tra \u0111\u1ed9 s\u00e2u l\u1eafp \u0111\u1eb7t v\u00e0 v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t."},"content":{"rendered":"<p>S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 k\u1ebft qu\u1ea3 \u0111o gi\u1eefa nhi\u1ec7t k\u1ebf c\u00f4ng nghi\u1ec7p v\u00e0 PLC, b\u1ed9 truy\u1ec1n t\u00edn hi\u1ec7u nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c thi\u1ebft b\u1ecb c\u1ea7m tay kh\u00f4ng nh\u1ea5t thi\u1ebft c\u00f3 ngh\u0129a l\u00e0 nhi\u1ec7t k\u1ebf b\u1ecb h\u1ecfng. C\u00e1c thi\u1ebft b\u1ecb n\u00e0y c\u00f3 th\u1ec3 \u0111o \u1edf c\u00e1c \u0111i\u1ec3m kh\u00e1c nhau, s\u1eed d\u1ee5ng c\u00e1c nguy\u00ean l\u00fd c\u1ea3m bi\u1ebfn kh\u00e1c nhau v\u00e0 ph\u1ea3n h\u1ed3i \u1edf t\u1ed1c \u0111\u1ed9 kh\u00e1c nhau, v\u00ec v\u1eady s\u1ef1 ch\u00eanh l\u1ec7ch t\u1ea1m th\u1eddi l\u00e0 \u0111i\u1ec1u b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n<p>N\u1ebfu ch\u1ec9 s\u1ed1 \u0111o v\u1eabn cao ho\u1eb7c th\u1ea5p li\u00ean t\u1ee5c, tr\u01b0\u1edbc ti\u00ean h\u00e3y ki\u1ec3m tra \u0111\u1ed9 s\u00e2u c\u1eafm, v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t v\u00e0 tr\u1ea1ng th\u00e1i hi\u1ec7u chu\u1ea9n.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1280\" height=\"720\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-hero.jpg\" alt=\"4-inch adjustable-angle industrial thermometer with dial and long stem\" class=\"wp-image-5606\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-hero.jpg 1280w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-hero-300x169.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-hero-1024x576.jpg 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-hero-768x432.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-hero-18x10.jpg 18w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-hero-600x338.jpg 600w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">H\u00ecnh 1 | Nhi\u1ec7t k\u1ebf c\u00f4ng nghi\u1ec7p \u0111i\u1ec1u ch\u1ec9nh g\u00f3c 4 inch. C\u1ea3 g\u00f3c l\u1eafp \u0111\u1eb7t v\u00e0 v\u1ecb tr\u00ed th\u00e2n nhi\u1ec7t k\u1ebf \u0111\u1ec1u c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c \u0111\u1ecdc k\u1ebft qu\u1ea3 t\u1ea1i ch\u1ed7.<\/figcaption><\/figure>\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\/industrial-thermometer-inaccurate-reading\/#why-can-an-industrial-thermometer-give-an-inaccurate-reading\" >T\u1ea1i sao nhi\u1ec7t k\u1ebf c\u00f4ng nghi\u1ec7p l\u1ea1i c\u00f3 th\u1ec3 cho k\u1ebft qu\u1ea3 \u0111o kh\u00f4ng ch\u00ednh x\u00e1c?<\/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\/industrial-thermometer-inaccurate-reading\/#why-does-insertion-depth-affect-the-reading\" >T\u1ea1i sao \u0111\u1ed9 s\u00e2u ch\u00e8n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng \u0111\u1ecdc?<\/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\/industrial-thermometer-inaccurate-reading\/#how-can-you-tell-whether-the-problem-is-installation-or-the-instrument\" >L\u00e0m sao \u0111\u1ec3 bi\u1ebft v\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf kh\u00e2u l\u1eafp \u0111\u1eb7t hay \u1edf thi\u1ebft b\u1ecb?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.sj-gauge.com\/vi\/industrial-thermometer-inaccurate-reading\/#international-standards-references\" >T\u00e0i li\u1ec7u tham kh\u1ea3o ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.sj-gauge.com\/vi\/industrial-thermometer-inaccurate-reading\/#frequently-asked-questions\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.sj-gauge.com\/vi\/industrial-thermometer-inaccurate-reading\/#conclusion\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-why-can-an-industrial-thermometer-give-an-inaccurate-reading\"><span class=\"ez-toc-section\" id=\"why-can-an-industrial-thermometer-give-an-inaccurate-reading\"><\/span>T\u1ea1i sao nhi\u1ec7t k\u1ebf c\u00f4ng nghi\u1ec7p l\u1ea1i c\u00f3 th\u1ec3 cho k\u1ebft qu\u1ea3 \u0111o kh\u00f4ng ch\u00ednh x\u00e1c?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u00e1c nguy\u00ean nh\u00e2n th\u01b0\u1eddng g\u1eb7p g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0110\u1ed9 s\u00e2u c\u1ee7a th\u00e2n nhi\u1ec7t k\u1ebf kh\u00f4ng \u0111\u1ee7 (immersion).<\/li>\n\n\n\n<li>\u0110\u1ea7u c\u1ea3m bi\u1ebfn n\u1eb1m qu\u00e1 g\u1ea7n th\u00e0nh \u1ed1ng ho\u1eb7c v\u1ecf b\u00ecnh ch\u1ee9a.<\/li>\n\n\n\n<li>L\u1eafp \u0111\u1eb7t trong khu v\u1ef1c n\u01b0\u1edbc t\u00f9 \u0111\u1ecdng ho\u1eb7c kh\u00f4ng c\u00f3 d\u00f2ng ch\u1ea3y<\/li>\n\n\n\n<li>Nhi\u1ec7t \u0111\u1ed9 qu\u00e1 tr\u00ecnh \u0111ang thay \u0111\u1ed5i v\u00e0 c\u00e1c thi\u1ebft b\u1ecb \u0111o ph\u1ea3n \u1ee9ng v\u1edbi t\u1ed1c \u0111\u1ed9 kh\u00e1c nhau.<\/li>\n\n\n\n<li>Kho\u1ea3ng \u0111o qu\u00e1 r\u1ed9ng, khi\u1ebfn thang \u0111o kh\u00f3 \u0111\u1ecdc.<\/li>\n\n\n\n<li>Hi\u1ec7n t\u01b0\u1ee3ng sai l\u1ec7ch hi\u1ec7u chu\u1ea9n sau th\u1eddi gian s\u1eed d\u1ee5ng d\u00e0i h\u1ea1n.<\/li>\n\n\n\n<li>\u1ed0ng b\u1ea3o v\u1ec7 c\u1ea3m bi\u1ebfn nhi\u1ec7t, l\u1edbp c\u00e1ch nhi\u1ec7t ho\u1eb7c \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng xung quanh t\u1ea1o ra sai s\u1ed1 d\u1eabn nhi\u1ec7t.<\/li>\n<\/ul>\n\n\n\n<p>Tr\u01b0\u1edbc khi so s\u00e1nh hai nhi\u1ec7t k\u1ebf, h\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng ch\u00fang \u0111o c\u00f9ng m\u1ed9t v\u1ecb tr\u00ed, c\u00f9ng m\u1ed9t m\u00f4i tr\u01b0\u1eddng v\u00e0 c\u00f9ng m\u1ed9t th\u1eddi \u0111i\u1ec3m.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-does-insertion-depth-affect-the-reading\"><span class=\"ez-toc-section\" id=\"why-does-insertion-depth-affect-the-reading\"><\/span>T\u1ea1i sao \u0111\u1ed9 s\u00e2u ch\u00e8n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng \u0111\u1ecdc?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>N\u1ebfu ph\u1ea7n c\u1ea3m bi\u1ebfn kh\u00f4ng k\u00e9o d\u00e0i \u0111\u1ee7 s\u00e2u v\u00e0o m\u00f4i tr\u01b0\u1eddng, k\u1ebft qu\u1ea3 \u0111o c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi th\u00e0nh \u1ed1ng v\u00e0 kh\u00f4ng kh\u00ed xung quanh. Tr\u00ean \u0111\u01b0\u1eddng \u1ed1ng n\u00f3ng, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 \u0111o th\u1ea5p; tr\u00ean \u0111\u01b0\u1eddng \u1ed1ng l\u1ea1nh, nhi\u1ec7t l\u01b0\u1ee3ng t\u1eeb m\u00f4i tr\u01b0\u1eddng xung quanh c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 \u0111o cao.<\/p>\n\n\n\n<p>Chi\u1ec1u d\u00e0i \u0111o\u1ea1n n\u1ed1i ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi \u0111\u01b0\u1eddng k\u00ednh \u1ed1ng, v\u00f9ng c\u1ea3m bi\u1ebfn ho\u1ea1t \u0111\u1ed9ng c\u1ee7a th\u00e2n van v\u00e0 \u0111i\u1ec1u ki\u1ec7n ch\u1ea5t l\u1ecfng. Vi\u1ec7c c\u00f3 th\u1ec3 v\u1eb7n kh\u1edbp n\u1ed1i v\u00e0o \u0111\u00fang v\u1ecb tr\u00ed kh\u00f4ng t\u1ef1 n\u00f3 ch\u1ee9ng minh vi\u1ec7c l\u1eafp \u0111\u1eb7t \u0111\u00e3 \u0111\u00fang.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1280\" height=\"720\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-depth.jpg\" alt=\"Long-stem industrial thermometer illustrating adequate insertion depth\" class=\"wp-image-5607\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-depth.jpg 1280w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-depth-300x169.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-depth-1024x576.jpg 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-depth-768x432.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-depth-18x10.jpg 18w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-depth-600x338.jpg 600w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">H\u00ecnh 2 | Nhi\u1ec7t k\u1ebf th\u00e2n d\u00e0i. \u0110\u1ed9 s\u00e2u c\u1eafm kh\u00f4ng \u0111\u1ee7 l\u00e0m cho k\u1ebft qu\u1ea3 \u0111o d\u1ec5 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi th\u00e0nh \u1ed1ng v\u00e0 \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng xung quanh.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-can-you-tell-whether-the-problem-is-installation-or-the-instrument\"><span class=\"ez-toc-section\" id=\"how-can-you-tell-whether-the-problem-is-installation-or-the-instrument\"><\/span>L\u00e0m sao \u0111\u1ec3 bi\u1ebft v\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf kh\u00e2u l\u1eafp \u0111\u1eb7t hay \u1edf thi\u1ebft b\u1ecb?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ki\u1ec3m tra theo th\u1ee9 t\u1ef1 sau:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>X\u00e1c nh\u1eadn r\u1eb1ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a qu\u00e1 tr\u00ecnh \u0111\u00e3 \u1ed5n \u0111\u1ecbnh.<\/li>\n\n\n\n<li>So s\u00e1nh v\u1ecb tr\u00ed \u0111o v\u00e0 \u0111\u1ed9 s\u00e2u ch\u00e8n.<\/li>\n\n\n\n<li>H\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng k\u00edch th\u01b0\u1edbc c\u1ee7a \u1ed1ng b\u1ea3o v\u1ec7 nhi\u1ec7t v\u00e0 th\u00e2n c\u1ea3m bi\u1ebfn t\u01b0\u01a1ng th\u00edch v\u1edbi nhau.<\/li>\n\n\n\n<li>Ki\u1ec3m tra m\u1eb7t s\u1ed1, kim ch\u1ec9 v\u00e0 n\u00fam ch\u1ec9nh gi\u1edd xem c\u00f3 h\u01b0 h\u1ecfng g\u00ec kh\u00f4ng.<\/li>\n\n\n\n<li>Hi\u1ec7u chu\u1ea9n d\u1ef1a tr\u00ean m\u1ed9t ti\u00eau chu\u1ea9n tham chi\u1ebfu c\u00f3 th\u1ec3 truy v\u1ebft.<\/li>\n<\/ol>\n\n\n\n<p>Ch\u1ec9 s\u1ed1 \u0111o b\u1ec1 m\u1eb7t t\u1eeb nhi\u1ec7t k\u1ebf h\u1ed3ng ngo\u1ea1i kh\u00f4ng th\u1ec3 t\u1ef1 n\u00f3 ch\u1ee9ng minh r\u1eb1ng nhi\u1ec7t k\u1ebf \u0111\u1eb7t trong \u0111\u01b0\u1eddng \u1ed1ng kh\u00f4ng ch\u00ednh x\u00e1c v\u00ec hai thi\u1ebft b\u1ecb n\u00e0y \u0111o \u1edf c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1280\" height=\"720\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-connector.jpg\" alt=\"Industrial thermometer with connector and thermowell components\" class=\"wp-image-5608\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-connector.jpg 1280w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-connector-300x169.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-connector-1024x576.jpg 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-connector-768x432.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-connector-18x10.jpg 18w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/08\/sj-thermometer-connector-600x338.jpg 600w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">H\u00ecnh 3 | C\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a nhi\u1ec7t k\u1ebf, \u0111\u1ea7u n\u1ed1i v\u00e0 \u1ed1ng b\u1ea3o v\u1ec7 nhi\u1ec7t. X\u00e1c nh\u1eadn t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1ec1 k\u00edch th\u01b0\u1edbc v\u00e0 th\u00e2n tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-international-standards-references\"><span class=\"ez-toc-section\" id=\"international-standards-references\"><\/span>T\u00e0i li\u1ec7u tham kh\u1ea3o ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u00e1c ti\u00eau chu\u1ea9n sau \u0111\u00e2y c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 vi\u1ec7c l\u1ef1a ch\u1ecdn, l\u1eafp \u0111\u1eb7t v\u00e0 ki\u1ec3m ch\u1ee9ng cho ch\u1ee7 \u0111\u1ec1 n\u00e0y:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/knowledge.bsigroup.com\/products\/dial-thermometers\">EN 13190:2001:<\/a><\/strong> Ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u v\u00e0 th\u1eed nghi\u1ec7m \u0111\u1ed1i v\u1edbi nhi\u1ec7t k\u1ebf m\u1eb7t s\u1ed1 c\u00f4ng nghi\u1ec7p, \u0111\u1ed3ng th\u1eddi cung c\u1ea5p h\u01b0\u1edbng d\u1eabn v\u1ec1 l\u1ef1a ch\u1ecdn v\u00e0 l\u1eafp \u0111\u1eb7t.<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/63753\">IEC 60751:2022:<\/a><\/strong> Khi s\u1eed d\u1ee5ng nhi\u1ec7t k\u1ebf \u0111i\u1ec7n tr\u1edf b\u1ea1ch kim c\u00f4ng nghi\u1ec7p ho\u1eb7c c\u1ea3m bi\u1ebfn Pt100 l\u00e0m chu\u1ea9n so s\u00e1nh, h\u00e3y ki\u1ec3m tra m\u1ed1i quan h\u1ec7 gi\u1eefa \u0111i\u1ec7n tr\u1edf v\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u0169ng nh\u01b0 dung sai c\u1ee7a n\u00f3.<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/2521\">IEC 60584-1:2013:<\/a><\/strong> Khi s\u1eed d\u1ee5ng c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n l\u00e0m chu\u1ea9n so s\u00e1nh, h\u00e3y ki\u1ec3m tra th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 dung sai \u0111i\u1ec7n \u00e1p nhi\u1ec7t \u0111i\u1ec7n c\u1ee7a n\u00f3 thay v\u00ec \u00e1p d\u1ee5ng tr\u1ef1c ti\u1ebfp dung sai c\u1ee7a nhi\u1ec7t k\u1ebf m\u1eb7t s\u1ed1.<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.iso.org\/standard\/66912.html\">ISO\/IEC 17025:2017:<\/a><\/strong> Khi c\u1ea7n x\u00e1c \u0111\u1ecbnh sai s\u1ed1 ch\u00ednh th\u1ee9c, h\u00e3y y\u00eau c\u1ea7u k\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 truy xu\u1ea5t ngu\u1ed3n g\u1ed1c t\u1eeb ph\u00f2ng th\u00ed nghi\u1ec7m hi\u1ec7u chu\u1ea9n c\u00f3 n\u0103ng l\u1ef1c ph\u00f9 h\u1ee3p.<\/li>\n<\/ul>\n\n\n\n<p><strong>Ghi ch\u00fa v\u1ec1 ti\u00eau chu\u1ea9n:<\/strong> X\u00e1c nh\u1eadn ph\u1ea1m vi, phi\u00ean b\u1ea3n v\u00e0 t\u00e0i li\u1ec7u ch\u1ee9ng nh\u1eadn \u00e1p d\u1ee5ng cho v\u1ecb tr\u00ed thi\u1ebft b\u1ecb, r\u1ee7i ro quy tr\u00ecnh v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt mua h\u00e0ng. Vi\u1ec7c tr\u00edch d\u1eabn m\u1ed9t ti\u00eau chu\u1ea9n kh\u00f4ng t\u1ef1 \u0111\u1ed9ng ch\u1ee9ng nh\u1eadn s\u1ea3n ph\u1ea9m ho\u1eb7c thay th\u1ebf vi\u1ec7c x\u00e1c minh ki\u1ec3u lo\u1ea1i c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions\"><span class=\"ez-toc-section\" id=\"frequently-asked-questions\"><\/span>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-is-a-difference-of-a-few-degrees-between-a-new-and-an-old-thermometer-normal\">Ch\u00eanh l\u1ec7ch v\u00e0i \u0111\u1ed9 gi\u1eefa nhi\u1ec7t k\u1ebf m\u1edbi v\u00e0 nhi\u1ec7t k\u1ebf c\u0169 c\u00f3 ph\u1ea3i l\u00e0 b\u00ecnh th\u01b0\u1eddng kh\u00f4ng?<\/h3>\n\n\n\n<p>\u0110i\u1ec1u n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o c\u1ea5p \u0111\u1ed9 ch\u00ednh x\u00e1c, ph\u1ea1m vi \u0111o, v\u1ecb tr\u00ed \u0111o v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a quy tr\u00ecnh. Kh\u00f4ng n\u00ean ch\u1ec9 \u0111\u00e1nh gi\u00e1 d\u1ef1a tr\u00ean s\u1ed1 \u0111\u1ed9; h\u00e3y so s\u00e1nh sai s\u1ed1 cho ph\u00e9p c\u1ee7a t\u1eebng thi\u1ebft b\u1ecb.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-can-i-solve-the-problem-by-adjusting-the-pointer\">T\u00f4i c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 b\u1eb1ng c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh con tr\u1ecf kh\u00f4ng?<\/h3>\n\n\n\n<p>N\u1ebfu l\u1ed7i do \u0111\u1ed9 s\u00e2u c\u1eafm ho\u1eb7c v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t g\u00e2y ra, vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh kim ch\u1ec9 th\u1ecb ch\u1ec9 che gi\u1ea5u v\u1ea5n \u0111\u1ec1. H\u00e3y x\u00e1c \u0111\u1ecbnh ngu\u1ed3n g\u1ed1c l\u1ed7i tr\u01b0\u1edbc khi hi\u1ec7u chu\u1ea9n ho\u1eb7c \u0111i\u1ec1u ch\u1ec9nh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion\"><span class=\"ez-toc-section\" id=\"conclusion\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Khi nhi\u1ec7t k\u1ebf c\u00f4ng nghi\u1ec7p cho k\u1ebft qu\u1ea3 kh\u00f4ng ch\u00ednh x\u00e1c, \u0111\u1eebng v\u1ed9i cho r\u1eb1ng thi\u1ebft b\u1ecb b\u1ecb h\u1ecfng. \u0110\u1ed9 s\u00e2u c\u1eafm v\u00e0o, v\u1ecb tr\u00ed \u0111o, t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i, thi\u1ebft k\u1ebf \u1ed1ng b\u1ea3o v\u1ec7 nhi\u1ec7t v\u00e0 t\u00ecnh tr\u1ea1ng hi\u1ec7u chu\u1ea9n \u0111\u1ec1u c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 kh\u00e1c bi\u1ec7t.<\/p>\n\n\n\n<p><strong><a href=\"https:\/\/www.sj-gauge.com\/vi\/contact\/\">N\u1ebfu nhi\u1ec1u nhi\u1ec7t k\u1ebf t\u1ea1i c\u00f4ng tr\u01b0\u1eddng cho k\u1ebft qu\u1ea3 \u0111o kh\u00f4ng nh\u1ea5t qu\u00e1n, h\u00e3y g\u1eedi cho SJ Gauge \u0111\u01b0\u1eddng k\u00ednh \u1ed1ng, chi\u1ec1u d\u00e0i \u0111o\u1ea1n \u1ed1ng, ph\u1ea1m vi \u0111o v\u00e0 \u1ea3nh l\u1eafp \u0111\u1eb7t \u0111\u1ec3 nh\u00f3m c\u1ee7a ch\u00fang t\u00f4i c\u00f3 th\u1ec3 gi\u00fap x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 x\u1ea3y ra.<\/a><\/strong><\/p>\n\n\n\n<p>(<strong>\u0110\u1ecdc th\u00eam:<\/strong> <a href=\"https:\/\/www.sj-gauge.com\/vi\/industrial-thermometers-types\/\">C\u00e1c lo\u1ea1i nhi\u1ec7t k\u1ebf c\u00f4ng nghi\u1ec7p v\u00e0 c\u00e1ch l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p<\/a>)<\/p>","protected":false},"excerpt":{"rendered":"<p>A reading difference between an industrial thermometer and a PLC, temperature transmitter, or handheld instrument does not necessarily mean the thermometer has failed. The instruments may measure at different points, use different sensing principles, and respond at different speeds, so temporary discrepancies are normal. If the reading remains consistently high or low, first check the [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":5616,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[72],"class_list":["post-5605","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 v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Inaccurate Industrial Thermometer Readings | SJ Gauge<\/title>\n<meta name=\"description\" content=\"Industrial thermometer readings can vary because of insertion depth, installation position, response time, thermowell effects, or calibration drift.\" \/>\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\/industrial-thermometer-inaccurate-reading\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Industrial Thermometer Reading Inaccurate? 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