Final Report on Torque with Cross Force Comparison No. MT01 ...

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<strong>Final</strong> <strong>Report</strong> of MT017. Analyzing method of comparison resultsThe results of comparison were determined according to ISO/IEC GUIDE 43-1 :1997 and ISO/IEC GUIDE 43-2 : 1997 “PROFICIENCY TESTING BYINTERLABORATORY COMPARISONS” [1], [2]. The objective is to measure thedeviation from reference value and determine its acceptability with performance criteriaby using equation as following:1) Percent difference, d( x − X )irefd = ×100(1)XrefWhere:x is the measured value of participating laboratories i (i =1,2,…,n)iXrefis the reference value that provided by National Institute ofMetrology (Thailand)2) Ennumbers,xi− XrefdEn= =(2)2 22 2U ( xi) + U ( X ref ) W( xi) + W( X ref )Where:U is the expanded uncertainty of a participant’s result.The( x i)U is the expanded uncertainty of NIMT’s result.( x ref)W( x i )is the expanded relative uncertainty of a participant’s result in termof %.W is the expanded relative uncertainty of NIMT’s result in term of %.( x ref)Ennumber is determined with performance criteria that is express as- The comparison results are satisfactory if En≤ 1.- The comparison results are unsatisfactory if En> 1.- The measurement system should be investigated when 0.5≤ E ≤ 1.8. Comparison resultsFrom the measurement data, the deviation and E n numbers of each participantwere computed as shown in table 5 and table 6 respectively. Figure 9 to figure 28 showthe deviation at -40 N·m, 40 N·m, -60 N·m, 60 N·m, -80 N·m, 80 N·m, -100 N·m, 100N·m, -150 N·m, 150 N·m, -200 N·m, 200 N·m, -250 N·m, 250 N·m, -300 N·m, 300 N·m,-350 N·m, 350 N·m, -400 N·m and 400 N·m respectively. Figure 29 to figure 38 show E nnumbers at ±40 N·m, ±60 N·m, ±80 N·m, ±100 N·m, ±150 N·m, ±200 N·m, ±250 N·m,±300 N·m, ±350 N·m and ±400 N·m respectively.n14
<strong>Final</strong> <strong>Report</strong> of MT01Table 5. Deviation from reference valuesNominalDeviation from reference values in %inN·mPilot 2 nd 3 rd 4 th 5 th 6 th 7 th 8 th 9 th 10 th 11 th 12 th 13 th 14 th 15 th 16 th 17 th 18 th-400 -0.57 0.30 -0.02 0.01 0.13 -0.17 -0.03-350 -0.59 0.35 -0.38 0.01 0.16 -0.18 -0.04-300 0.33 -0.06 0.41 -0.43 0.02 -0.54 -0.02 0.01 0.19 -0.19 -0.03-250 0.25 -0.08 0.40 -0.45 -0.20 -0.04 -0.01 0.22 -0.19 -0.08-200 0.34 -0.10 0.68 -0.41 0.05 -0.29 -0.60 0.04 -0.01 0.27 -0.22 -0.11 0.16-150 0.30 -0.01 -0.19 -0.49 0.28 -0.50 0.20 -0.10 0.36 -0.19 -0.10 0.14-100 0.36 0.06 -0.15 -0.13 0.21 -0.08 0.04 0.34 -0.37 0.26 0.45 -0.11 -0.13 0.12-80 0.32 -0.41 -0.64 -0.14 0.29 -0.04 0.34 0.37 0.42 0.54 -0.17 0.12-60 0.21 -0.48 -0.15 -0.17 0.31 -0.13 0.42 0.75 0.41 0.61 -0.18-40 0.29 -0.37 -0.06 -0.19 0.56 0.03 0.50 -0.10 1.00 -0.2240 0.49 -0.15 -0.44 0.00 1.06 0.01 0.69 -0.45 0.29 -0.0360 0.34 0.50 0.22 0.02 1.02 0.32 0.57 0.13 -0.21 0.43 0.0780 0.42 0.46 0.03 0.04 0.82 0.38 0.53 0.03 -0.21 0.42 0.01 0.16100 0.42 -0.30 0.07 0.00 0.50 0.12 0.02 0.42 0.15 -0.16 0.36 0.08 -0.01 0.16150 0.33 -0.16 0.03 -0.23 0.38 0.02 0.06 0.16 0.34 0.10 0.25 0.18200 0.14 -0.18 -0.34 0.21 -0.39 0.02 0.75 0.13 0.29 0.12 0.23 0.09 0.16 0.17250 0.19 -0.10 -0.14 -0.04 -0.42 0.06 0.45 0.14 0.22 0.13 0.13300 0.23 -0.06 -0.29 0.14 -0.36 -0.02 -0.12 0.23 0.12 0.20 0.15 0.09350 0.74 0.18 0.17 0.21 0.12 0.18 0.16 0.04400 0.78 -0.22 0.13 -0.04 0.12 0.17 0.14 0.1415
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