http://oar.a-star.edu.sg:80/jspui/handle/123456789/114 Fri, 23 Jun 2017 16:20:22 GMT 2017-06-23T16:20:22Z http://oar.a-star.edu.sg:80/jspui/handle/123456789/2077 Title: Final report on APMP supplementary comparison of industrial platinum resistance thermometer for range -50 °C to 400 °C. (APMP.T-S6) Authors: Ali, Nurulaini Md; Othman, Hafidzah; Ho, Mong-Kim; Yang, Inseok; Gabi, Victor; Zhang, Zhe; Sheng, Ying; Hu, Jing; Zhang, Jintao; Tsai, Shu-Fei; Liao, Su-Chuion; Alam, Md Shafiqul; Norranim, Uthai; Yaokulbodee, Charuayrat; Liedberg, Hans; Ahmed, Mohamed Gamal; Harba, Naser; Flaifel, Mustafa Fuad; Suherlan; Achmadi, Aditya; Kho, Haoyuan; Fan, Yan; Kwee, Neoh Boon; Binh, Pham Thanh; Ragay, Monalisa Abstract: The National Metrology Laboratory, Malaysia (NML-SIRIM) had coordinated the Supplementary Comparison of Industrial Platinum Resistance Thermometer (IPRT) started from July 2009 until April 2011 together with the National Measurement Institute of Australia (NMIA) and Korea Research Institute of Standards and Science (KRISS). This comparison was opened to all APMP members and 16 participants had taken part in order to consolidate or improve their calibration and measurement capabilities (CMCs). Three units of artefacts 100-ohm IPRT belonging to NML-SIRIM, NMIA and KRISS were used and three loops of measurement were run in parallel to shorten the circulation time. The stability of artefacts was monitored with initial and final ice point measurement by each laboratory. The participants need to perform measurement at temperature points (0,-50,-30, 0, 100, 200, 300, 400,0) °C. All submitted data were compiled and adjusted at nominal temperature and by using the linkage from NMIA and KRISS as reference value for all three loops , the temperature deviation from participants from different loops can be compared. The approach of Birge Ratio for final exclusion comprised all the excluded results from the analysis of each loop and the measurement performance for each participant were summarized by the En number value. Description: Full paper can be downloaded from the Publisher's URL provided. Sun, 01 Jan 2017 00:00:00 GMT http://oar.a-star.edu.sg:80/jspui/handle/123456789/2077 2017-01-01T00:00:00Z http://oar.a-star.edu.sg:80/jspui/handle/123456789/2076 Title: Final report on APMP.T-K7 key comparison of water triple point cells Authors: Tsai, S F; White, R; Tamba, J; Yamazawa, K; Ho, M K; Tsui, C M; Zaid, G; Achmadi, A; Gam, K S; Othman, H Abstract: APMP.T-K7, was held from February 2008 to September 2009 to compare the national realizations of the water triple point among eleven NMIs. To reach the objective, each participating laboratory sent a transfer cell to CMS and stated a value for the temperature difference of the transfer cell, relative to the corresponding national standard, representing 273.16 K. CMS (Taiwan) organized the comparison, with the support from co-pilot institutes MSL (New Zealand) and NMIJ (Japan). The other eight participating laboratories included NMIA, SCL, KIM-LIPI, KRISS, NMIM/SIRIM, NMC, NMISA, and NIMT. This report presents the results of the TPW comparison, gives detailed information about the measurements made at the CMS and at the participating laboratories, and aims to link the results of APMP.T-K7 to CCT-K7. The results of this key comparison are also represented in the form of degrees of equivalence for the purposes of the MRA. Fri, 01 Jan 2016 00:00:00 GMT http://oar.a-star.edu.sg:80/jspui/handle/123456789/2076 2016-01-01T00:00:00Z http://oar.a-star.edu.sg:80/jspui/handle/123456789/2073 Title: Interpolating AC-DC Transfer Differences for an AC-DC Voltage Transfer Standard Authors: Jing, Tao; Sim, Justin Abstract: The AC-DC difference of an AC-DC transfer standard varies with its input voltage and ac frequencies. Its calibration may not necessarily cover all the voltage-frequency points for their possible uses in practice. This results in situations when there is no reference value to use such a transfer standard for calibrations at some voltage-frequency points. This paper analyses the principle structure of a transfer standard, shows the possibility of interpolating points based on calibrated ones, and presents the interpolation results performed in the National Metrology Centre (NMC). Description: (c) 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. Sun, 24 Aug 2014 00:00:00 GMT http://oar.a-star.edu.sg:80/jspui/handle/123456789/2073 2014-08-24T00:00:00Z http://oar.a-star.edu.sg:80/jspui/handle/123456789/2072 Title: Report on NIM-NMC bilateral comparison: SPRT calibration comparison from −190°C to 420°C Authors: Sun, Jianping; Ye, Shaochun; Wang, Li; Zhang, Jintao; Kho, Haoyuan Abstract: A bilateral comparison of local realization of the International temperature scale of 1990 (ITS-90) between National Institute of Metrology (NIM) and National Metrology Centre (NMC) was carried out over the temperature range from -190°C to 420°C. It involved six fixed points including the argon triple point, the mercury triple point, the triple point of water, the melting point of gallium, the freezing point of tin and the freezing point of zinc. In 2009, NMC asked NIM to participate in a bilateral comparison to link the NMC results to the Consultative Committee for Thermometry Key comparison 3 (CCT-K3) and facilitate the NMC's Calibration and measurement capabilities (CMCs) submission. This comparison was agreed by NIM and Asia Pacific Metrology Programme (APMP) in 2009, and registered in the Key Comparison Database (KCDB) in 2010 as CCT-K3.2. NMC supplied two 25 Ω fused silica sheath standard platinum resistance thermometers (SPRTs) as travelling standards. One of them was used at the Ga, Sn and Zn fixed points, while the other one was used at the Ar and Hg fixed point. NMC measured them before and after NIM measurement. During the comparison, a criterion for the SPRT was set as the stability at the triple point of water to be less than 0.3 mK. The results for both laboratories are summarized. A proposal for linking the NMC's comparison results to CCT-K3 is presented. The difference between NMC and NIM and the difference between NMC and the CCT-K3 Average Reference Value (ARV) using NIM as a link are reported with expanded uncertainties at each measured fixed point. Fri, 01 Jan 2016 00:00:00 GMT http://oar.a-star.edu.sg:80/jspui/handle/123456789/2072 2016-01-01T00:00:00Z