ISO 22192:2021 Bunkering of marine fuel using the Coriolis mass flow meter (MFM) system.
5.2.2 The calibration should be done using bunker fuel or equivalent fluid once the primary calibration facilities are available to meet the traceability and calibration uncertainty requirements. Until the requirements in this subclause are fulfilled, the calibration requirements as stated in 5.1,3 and 52A shall apply for every MFM before approval for custody transfer use.
5.2.3 For water calibration (level 1) with direct traceability to S.l. unit of mass, the maximum error of MFM shall not more than 0,1 % of reading. The calibration shall he carried out by a laboratory meeting the requirements of ISO/IEC 17025.
5.2.4 There shall he a letter, accompanied by relevant supporting documents, declaring that the meter performance meets the requirement of maximum measurement uncertainty for bunker fuel fluid flow measurement to be not more than 0,2 % (level 2).
NOTE Supporting documents are inclusive but not limited to type evaluation certificates for regional directives (e.g. EC/EU type examination), and reports oltests conducted as part of the process in obtaining these type evaluation certificates.
The report(s, supporting documents and letter shall he issued by either:
a) a national metrology institute; or
b) an appointed International Organization of Legal Metrology(OlML issuing authority in accordance with the relevant OIML recommendations.
5.2.5 The MFM calibration report shall comprise the following details in addition to what is in
ISO/IEC 17025:
a) expanded measurement uncertainty;
b) meter errors across the measurement range between the minimum mass flow rate, Qmjn and the
maximum mass flow rate, Qrnax
c) configuration and parameter setting values, including calibration factors to a specific MFM such as serial number and stored zero value.
5.2.6 The MFM used for bi-directional measurements shall be calibrated at forward and reverse flow directions with at least five evenly spaced flowrates in each direction across the measurement range between Qmin and Qmax of the MFM. Each flowrate shall have at least 3 runs.
5.2.7 The MFM shall also be tested to prove the meter stability periodically. MFM shall be re-calibrated if the requirement 53J is not met.
5.3 Mass flow meter system requirements
5.3.1 The expanded measurement uncertainty of overall performance of the MFM system shall be not more than 0,5 %. It should take into consideration the following uncertainty sources influenced by:
— meter calibration;
— product condition e.g. viscosity and density;
— process flow condition e.g. aeration flow and flow turbulences;
— piping line system configuration and meter installation which can affect measurement
conditions; and
— any other source that may influence the mass flow measurement.ISO 22192 pdf download.