BS EN 116 Diesel and domestic heating fuels - Determination of cold filter plugging point - Stepwise cooling bath method
12 Expression of results
Report the temperature read or indicated at the beginning of the last filtration to the nearest 1 °C (see 10.8 and 10.9) as the cold filter plugging point.
13 Precision
13.1 General
The statistical analysis was carried out using EN ISO 4259.
The precision analysis is based on a study carried out in 2011. That study included FAME, heating oil and diesel fuels covering the range from 0 % to 30 % in volume of FAME, as well as paraffinic diesel fuels.
The range of CFPP values for the Round Robin was from −47 °C to 11 °C. Extrapolations to measurements more than a few degrees outside this range are unsupported by the data.
NOTE A technical report with further details on the analysis is under development within CEN.
13.2 Repeatability
The difference between two test results, obtained by the same operator with the same apparatus under constant operating conditions on identical test material would in the long run, in the normal and correct operation of the test method, exceed the values calculated from the following formula in absolute value only in one case in 20:
r = 1.2 - 0.027X
where
X is the average of the two results being compared, in °C.
13.3 Reproducibility
The difference between two single and independent results obtained by different operators working in different laboratories on identical test material, would in the long run, in the normal and correct operation of the test method, exceed the values calculated from the following formula in absolute value only in one case in 20:
R = 3.0 - 0.060X
where
X is the average of the two results being compared, in °C.
14 Test report
The test report shall include at least the following information:
a) a reference to this European Standard, i.e. EN 116;
b) the type and complete identification of the product under test;
c) the sampling procedure used (see Clause 7);
d) the result of the test (see Clause 12);
e) any deviation from the procedure described (see 2nd paragraph in 10.8);
f) the date of the test.
