{"id":2939,"date":"2018-10-12T03:04:36","date_gmt":"2018-10-12T08:04:36","guid":{"rendered":"https:\/\/www.arbin.com\/?p=2939"},"modified":"2023-02-20T09:41:29","modified_gmt":"2023-02-20T15:41:29","slug":"evaluating-battery-test-equipment-02","status":"publish","type":"post","link":"https:\/\/dev.arbin.com\/de\/evaluating-battery-test-equipment-02.html","title":{"rendered":"Bewertung von Batterietestger\u00e4ten - Teil 2\/12 - Pr\u00e4zision"},"content":{"rendered":"

Pr\u00e4zision<\/strong> determines the level of noise\/fluctuation present in the test equipment\u2019s measurement.  Precision also indicates the consistency and repeatability of the instrument\u2019s measurement circuitry.  A measurement with very little noise\/fluctuation is considered to be precise.  Measurement precision at \u201c100ppm\u201d indicates it will vary by no more than 0.01% (100\/1,000,000).<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Many instruments will not specify their precision, which is a warning sign, or will improperly report precision though multiple averaged calculations or very slow frequency data logging that hides the noise.  Another common tactic is to report precision of battery coulombic efficiency calculations instead of hardware specification. These practices are misleading and reflect negatively on the company\u2019s reputation.  [Ask to learn more.]<\/p>\n\n\n\n

The test equipment resolution, quality of materials, and thermal management all play a significant role to provide superior precision.  Precision should be specified directly for the voltage, current, time, and sometimes temperature measurement of the test equipment.<\/p>\n\n\n\n

\u00dcbersetzt man dies in Testergebnisse...
<\/b>Arbin defines the measurement precision for voltage<\/i>, current<\/i>und time <\/i>for each class of test equipment.  These are the three parameters measured by the test equipment that define its performance.  Quartz timing crystals are used for measurement and timestamp; representing the state-of-the art method for such measurements.<\/p>\n\n\n\n

The benefits of high-precision measurements during battery research have been widely discussed in academia for almost a decade.  Coulombic efficiency and differential capacity are two metrics that have been shown to require incredibly high precision test equipment to be meaningful and draw confident conclusions. These analytical techniques can miss or obscure signatures in the data if experiments are conducted with low precision test equipment that will generate noisy and inconsistent (unrepeatable) results.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

(1) Aufl\u00f6sung<\/a> | (2) Pr\u00e4zision<\/strong> | (3) Temperatur<\/a> | (4) Robustheit<\/a> | (5) Accuracy<\/a> | (6) Software<\/a><\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Zur\u00fcck\u2190<\/a>  |  \u2192Oder weiter zum n\u00e4chsten Abschnitt<\/a><\/p>","protected":false},"excerpt":{"rendered":"

Precision determines the level of noise\/fluctuation present in the test equipment\u2019s measurement.  Precision also indicates the consistency and repeatability of the instrument\u2019s measurement circuitry.  A measurement with very little noise\/fluctuation is considered to be precise.  Measurement precision at \u201c100ppm\u201d indicates it will vary by no more than 0.01% (100\/1,000,000). Many instruments will not specify their […]<\/p>","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[104],"tags":[106,109],"class_list":["post-2939","post","type-post","status-publish","format-standard","hentry","category-arbin-news","tag-battery-test-equipment","tag-precision"],"acf":[],"_links":{"self":[{"href":"https:\/\/dev.arbin.com\/de\/wp-json\/wp\/v2\/posts\/2939","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dev.arbin.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dev.arbin.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dev.arbin.com\/de\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/dev.arbin.com\/de\/wp-json\/wp\/v2\/comments?post=2939"}],"version-history":[{"count":0,"href":"https:\/\/dev.arbin.com\/de\/wp-json\/wp\/v2\/posts\/2939\/revisions"}],"wp:attachment":[{"href":"https:\/\/dev.arbin.com\/de\/wp-json\/wp\/v2\/media?parent=2939"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dev.arbin.com\/de\/wp-json\/wp\/v2\/categories?post=2939"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dev.arbin.com\/de\/wp-json\/wp\/v2\/tags?post=2939"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}