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REVISION OF EURAMET CG19 GUIDE PUBLISHED
April 8, 2019
On the EURAMET website, information was published about the revision of the EURAMET CG19 guide for the determination of measurement uncertainty when the gravimetric method is used.
In the working group responsible for the revision of the document, one of the six members was Ljiljana Mićić, head of the Group for volume and flow.
 
 
Pupils visited Control and Supervision Section Zrenjanin
April 4, 2019
In the first week of April 2019, Control and Supervision Section Zrenjanin, internal organizational unit of the Directorate of Measures and Precious Metals (hereinafter DMDM) hosted visit of final year pupils of Chemical, Food-processing and Textile school “Uroš Predić“ from Zrenjanin. Visit was hosted regarding upcoming World Metrology Day which will take place on the 20th of May.
Pupils were introduced with importance of metrology, the measurement science which is present in all fields of human activity, significance and way of ensuring metrological traceability up to international level as well as long metrology tradition in Serbia. Students were shown promo video of DMDM and presented importance and role of DMDM as national metrology institution.
In physical-cehmical laboratory of the Control and Supervision Section Zrenjanin, pupils were demonstrated verification of general purpose aerometer.
The most attention of prefessors and pupils drew way of conformity assessment of measuring instruments used in daily life.
 
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Training in the field of thermometry
April 3, 2019
Within project: „Regional Consultansy Fund for Quality Infrastructure - South East Europe“ - Bosna and Hercegovina implemented by the National metrology institute of Germany (PTB) on March 27, 2019 Directorate of measures and precious metals (DMDM) hosted one-day training in the field of thermometry, subfield non-contact temperature measurement.
Training was based on experience exchange in this field. The training was held by Ms. Slavica Simic, Head of Group for thermometry and Mr. Boban Zarkov, metrology scientist in Group for length, optical quantities and acoustics. The training consisted of theoretical and practical part regarding measurements principles, measurement uncertainties, and measurement methods settings in DMDM, result of DMDM international comparison within project EMPIR 14RPT05 EuraThermal as well as software solution for collection and processing of measurement results.
Training attended measurement scientists from national metrology institute of Bosnia and Herzegovina (IMBiH) and DMDM. The attendees expressed satisfaction both for information they received as well as good and efficient training organization in DMDM.
 
 
GPS Week Number Rollover
March 27, 2019.
Critical Infrastructure (CI) owners and operators and other users who obtain Coordinated Universal Time (UTC) from Global Positioning System (GPS) devices should be aware of the GPS Week Number (WN) rollover events and the possible effect a GPS WN rollover event may have on the reliability of the reported UTC. The legacy GPS navigation message has a ten (10) bit parameter that represents WN. Thus, the WN parameter in the GPS navigation message “rolls over” to zero every 1024 weeks starting from 0000Z January 6, 1980. The next WN rollover will occur April 6, 2019. The IS-GPS-200H interface specification identifies both the ten bit WN parameter and the WN rollover events. A GPS device that conforms to the latest IS-GPS-200 and provides UTC should not be adversely affected. However, tests of some GPS devices revealed that not all manufacturer implementations correctly handle the April 6, 2019 WN rollover. Additionally, some manufacturer implementations interpret the WN parameter relative to a date other than January 5, 1980. These devices should not be affected by the WN rollover on April 6, 2019 but may experience a similar rollover event at a future date. For example, a particular GPS device may interpret the WN parameter relative to a firmware creation date and would experience a similar rollover event 1024 weeks after that firmware creation date.
 
 
Third grade pupils of Fourth Belgrade High School visited Directorate of Measures and Precious Metals
Januar 17, 2019.
Third grade pupils of Fourth Belgrade High School visited Directorate of Measures and Precious Metals.
On behalf of Directorate, pupils were welcomed by Ana Gajic, Group for Information Technology. Pupils were introduced with role of Directorate in Metrology system of the Republic of Serbia and professional activities Directorate perfprms in the field of Metrology.
Study visit was continued with a tour through laboratories for temperature, chemistry, DC voltage, time, photometry, length and acoustics where they were introduced realized calibration methods and research in which Directorate participates in.
 
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