{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:11:51Z","timestamp":1760242311168,"version":"build-2065373602"},"reference-count":15,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2017,4,13]],"date-time":"2017-04-13T00:00:00Z","timestamp":1492041600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the National Science and Technology Support Program under Grant","award":["2011BAK15B06"],"award-info":[{"award-number":["2011BAK15B06"]}]},{"name":"the Special-Funded Program through the National Key Scienti\ufb01c Instruments and Equipment Development under Grant","award":["2012YQ090208"],"award-info":[{"award-number":["2012YQ090208"]}]},{"name":"National Key Research and Development Program for National Quality Infrastructure under Grant","award":["2016YFF0200103"],"award-info":[{"award-number":["2016YFF0200103"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Mass measurement of more than 500 kg on an electronic mass comparator has no better repeatability and linearity of measurement for meeting the calibration requirement of over class F1 weights from pharmacy and power generation plants. For this purpose, a new 2000 kg mechanical balance was developed by the National Institute of Metrology (NIM). The advantages of measurement of more than 500 kg on a new 2000 kg mechanical balance are introduced in the paper. In order to obtain high measurement uncertainty, four vertical forces of two sides of beam are measured and used as reference for adjustment of the beam position. Laser displacement sensors in the indication system are more effective for decreasing reading errors caused by human vision. To improve the repeatability and sensitivity of the equipment, a synchronous lifting control is designed for synchronously lifting the beam ends along the vertical direction. A counterweight selection system is developed to get any combination of weights in a limited space. The sensitivity of the new mechanical balance for 2000 kg is more than 1.7 parts in 10\u22124 rad\/g. The extended uncertainties for the mechanical balance of 500 kg, 1000 kg and 2000 kg are 0.47 g, 1.8 g and 3.5 g respectively.<\/jats:p>","DOI":"10.3390\/s17040851","type":"journal-article","created":{"date-parts":[[2017,4,13]],"date-time":"2017-04-13T10:55:44Z","timestamp":1492080944000},"page":"851","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Development of a New, High Sensitivity 2000 kg Mechanical Balance"],"prefix":"10.3390","volume":"17","author":[{"given":"Jian","family":"Wang","sequence":"first","affiliation":[{"name":"Division of Mechanics and Acoustics, National Institute of Metrology, Beijing 100029, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2017,4,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"319","DOI":"10.1088\/0026-1394\/41\/4\/014","article-title":"The BIPM flexure-strip balance FB-2","volume":"41","author":"Picard","year":"2004","journal-title":"Metrologia"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"298","DOI":"10.1088\/0026-1394\/46\/3\/018","article-title":"Mass determination with the magnetic levitation method\u2014Proposal for a new design of electromechanical system","volume":"46","author":"Kajastie","year":"2009","journal-title":"Metrologia"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"418","DOI":"10.1016\/j.measurement.2016.10.036","article-title":"Development of a high-accuracy 500 kg mass comparator for improved weight calibration capability","volume":"95","author":"Sun","year":"2017","journal-title":"Measurement"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1088\/0026-1394\/48\/3\/007","article-title":"Determination of the Planck constant with the METAS watt balance","volume":"48","author":"Eichenberger","year":"2011","journal-title":"Metrologia"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"592","DOI":"10.1109\/TIM.2007.890590","article-title":"Uncertainty improvements of the NIST electronic kilogram","volume":"56","author":"Steiner","year":"2007","journal-title":"IEEE Trans. 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