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一、前言本文以JJG475-2008《电子式万能试验机》检定规程示值进回程相对误差式(11)和式(12)为基础,连同JJG139-1999《拉力、压力和万能试验机》检定规程、JJG157-2008《非金属拉力、压力和万能试验机》检定规程中同类公式一并作简单分析。二、公式1.以试验机示值为准,在测力仪上读数,相对误差为u=〔(F′-F)/F〕×100%(11)式中:F′——标准测力仪回程指示的力的真值;F——标准测力仪进程指示的力的真值;F——n次测
I. Introduction In this paper, JJG475-2008 “electronic universal testing machine” test procedures show the value of the relative error back and forth equation (11) and (12) as the basis, together with JJG139-1999 “Rally, pressure and universal testing machine” test procedures , JJG157-2008 “non-metallic tensile, pressure and universal testing machine” test procedures in the same formula for a simple analysis. Second, the formula 1. The test machine shall prevail, the reading on the dynamometer, the relative error is u = 〔(F’-F) / F〕 × 100% (11) Where: F ’- standard test The true value of the force indicated by the return force of the force gauge; F - the true value of the force indicated by the process of the standard force gauge; F - n measurements