To accommodate current technological developments and laboratory conditions, ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) published the latest version of the ISO/IEC 17025 standard in 2017.Complying with ISO/IEC 17025:2017 enables laboratory to provide measurement results that are valid and traceable to international unit system. SNSU-BSN as National Metrology Institute (NMI) in Indonesia has transformed its management system from the old version ISO/IEC17025:2005 to the current ISO/IEC 17025:2017 in 2019. This study explains the process of SNSU-BSN transition in order to establish a management system complying with ISO/IEC 17025:2017. A comparison between the implementation of the old and the current ISO/IEC 17025 was explained along with its impacts and benefits.

The cross float (CF) method is well-known for its accurate and reliable results, however the difficulty on performing CF method arises when dealing with insensitive piston of calibrated DWT. In contrary, automatic transducer assisted cross float (TAC) method could be implemented since it does not affected by this condition as it advantages. The used of TAC method could avoid up to 0.008% relative error of effective area at zero pressure and at 20 °C (A0,20) and twice higher error distortion coefficient (b) in case of calibrating insensitive piston of DWT. In addition, the TAC method has another advantage that is save time with consistent result because it can be performed automatically. Once should be consider when using TAC method is the accuracy of pressure transducer. In this case study, the existing pressure transducer owned by National Measurement Standard-National Standardization Agency (SNSU-BSN), could be utilized to perform automatic TAC method in lower pressure range down to 2 MPa that below 10% of its maximum scale, to calibrate low accuracy DWT greater than 0.08%.

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