Intercomparison of calibration of master meters installed in a test rig, by two independent test methods (standard capacity tanks and Brooks piston prover)
Project Description
The error curves of four master meters (two for gasoline covering a flow rate range of 30 - 1400 l/min and two for diesel oil for the same flow rate range) are established by using two different test methods:
- use of standard capacity tanks (of the BEV test rig)
- use of a transportable Brooks piston prover (owner CMI) connected to the meters under test for the purpose of this intercomparison
By this, the reliability into the hydrocarbon CMC entries of both countries shall be reinforced. The project is comparable to BCR-project 3476/1/0/203/92/9-BCR-S830 and anticipating on the agreed CCM.FF-K2 project on hydrocarbons.
Final Report 2005-09-19
The comparison has been completed and the report can be downloaded here>>.
The error curves of four master meters (two for gasoline and two for diesel oil, flow rate range 30 - 1400 l/min), permanently installed in the BEV test rig, were measured by two different test methods:
- method 1: by the use of standard capacity tanks (of the BEV test rig), BR>
- method 2: by the use of a transportable Brooks piston prover (owner CMI).
By this, the reliability into the hydrocarbon CMC entries of both countries shall be reinforced. The project is comparable to BCR-project 3476/1/0/203/92/9-BCR-S(30) and anticipating on the agreed CCM.FF-K2 project on hydrocarbons.
The reproducibility ReC (according to ISO 5725, stating the probable max. difference of the representative K-factors between method 1 and method 2) is < 0,1 % for all 4 meters, while U(method 1; k=2) is ≤ ± 0,1 % and U(method 2; k=2) is ≤ ± 0,08 %.