ISO 22192:2021 コリオリ質量流量計（MFM）システムを使用した船舶用燃料のバンカリング | ページ 2

3.37

non-resettable totalizer

device that indicates the total cumulated flow quantity through the MFM (3.25) after it is secured for use in custody transfer such that its value is not resettable to zero or to other values

3.38

quantity delivered

cumulative mass quantity measured between the start of delivery and end of delivery and transferred to the vessel (3.47)

3.39

repeatability

proximity of a match among a series of results obtained with the same method on identical test material, under the same conditions (same operator, same apparatus, same laboratory and short intervals of time)

3.40

resettable totalizer

device that indicates total flow quantity through the MFM (3.25) from the start to the end of each batch and its value can be reset to zero

3.41

sample

bunker (3.5) specimen defined by time, location and method of sampling

3.42

stored zero value

value stored in the electronics after the zero-adjustment procedure

Note 1 to entry: Stored zero value is recorded during every zero-offset determination. Depending on manufacturer, the stored zero value can be in flow rate units or in time units or in % units.

3.43

traceability

metrological property of a measurement result, whereby the result can be related to a reference through a documented unbroken chain of calibrations verified by a national metrology institute, each contributing to the measurement uncertainty (3.30)

[SOURCE:JCGM 200]

3.44

transmitter

electronic control system that provides the drive and transforming the signals from the flow sensor, to give output(s) of measured and inferred parameters, and that also provides corrections derived from parameters such as temperature

3.45

update

installation of new system components, hardware or software, which have no significant effect on the metering result

Note 1 to entry: No testing is required after installation.

3.46

upgrade

installation of new system components, hardware or software, which can have a significant effect on the metering result

Note 1 to entry: New certification testing is required after installation.

3.47

vessel

ship that receives the bunker(s) (3.5)

3.48

zero offset

measurement output indicated under zero flow conditions

Note 1 to entry: A zero offset might be caused by stress being applied to the oscillating tubes by the surrounding pipework and by process conditions.

Note 2 to entry: A zero offset can be reduced by means of a zero-adjustment procedure.

3.49

zero offset limit

maximum allowable observed zero offset (3.48) in relation to the stored zero value, used to determine when to re-zero the flow meter, generally defined by the manufacturer

[SOURCE:API MPMS 5.6]

3.50

zero stability

magnitude of the meter output deviation from the stored zero value at zero flow after the zero adjustment procedure has been completed, expressed by the manufacturer as an absolute value in mass per unit time

Note 1 to entry: The stated value for zero stability is valid for stable conditions where the fluid is free of bubbles and sediment.

3.51

zero verification procedure

procedure to verify that the zero offset (3.48) does not exceed the zero offset limit (3.49)