接地電阻儀期間核查初步研究
茅圣仁1，2，許文進(jìn)1，吳坤平2，鄭建偉1，彭宗貴2
（1 福建省仙游縣氣象局，福建 仙游 351200 ；2 福建省莆田市防雷監(jiān)測(cè)技術(shù)中心，福建 莆田 351100）
摘 要：選用較大測(cè)量電流接地電阻儀為比對(duì)儀器,核查小測(cè)量電流接地電阻儀，多距離測(cè)量一小建筑物接地電阻，用聚類分析對(duì)各測(cè)量值作分類，取”測(cè)量水平段”作回歸分析、檢測(cè)能力驗(yàn)證。核查儀器、比對(duì)儀器有34～51 m、68～85 m不同的適宜測(cè)量距離；比對(duì)儀器適宜的測(cè)量距離取小值，核查儀器適宜的測(cè)量距離的檢測(cè)能力驗(yàn)證均是“滿意”的評(píng)定。接地電阻測(cè)量距離應(yīng)根據(jù)測(cè)量電流的大小取舍；核查儀器測(cè)量電流小，比對(duì)儀器適宜測(cè)量距離應(yīng)選小值進(jìn)行檢測(cè)能力驗(yàn)證；期間核查，既要參照規(guī)范推薦的接地電阻測(cè)量方法，又要遵循計(jì)量認(rèn)證的統(tǒng)計(jì)方法和要求。
關(guān)鍵詞：接地電阻儀；期間核查；回歸分析；檢測(cè)能力驗(yàn)證
中圖分類號(hào)：TM934.1 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1007-3175(2017)09-0051-05
Preliminary Study on Intermediate Checks of Grounding Resistance Meter
MAO Sheng-ren1,2, XU Wen-jin1, WU Kun-ping2, ZHENG Jian-wei1, PENG Zong-gui2
（1 Xianyou Meteorological Bureau in Fujian Province, Xianyou 351200, China;
2 Putian Lightning Protection Monitoring Technology Center in Fujian Province, Putian 351100, China）
Abstract: The larger measuring current ground resistance meter was selected as the comparison instrument to inspect the small measuring current ground resistance meter. The ground resistance about a small building was carried out multi-distance measurement. The clustering analysis was used to classify each measured value and the measurement horizontal section was taken as regression analysis and detectability confirmation. The inspecting and comparison instruments had the suitable measuring distances from 34 meter to 51 meter or from 68 meter to 85 meter. The minimum value was selected by comparing the suitable distances for measurement. The detectability confirmation of the measuring distance suitable for inspecting instruments was “satisfaction”. The measuring distance of grounding resistances should be selected by the size of measuring currents. The smaller value was selected for inspecting instruments while the measuring distance suitable for comparison instruments should be small to carry out the detectability verification. The intermediate inspecting should both refer to the measuring method of grounding resistance of the recommended specifications and follow the statistical method and requirements of metrological certification.
Key words: ground resistance meter; intermediate inspecting; regression analysis; detectability confirmation
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