the specimen fails to reach the 20 mL mark in less than 60 s or
fails to flow back into the test jar when the vacuum is cut off
as CFPP (see Section 13). The test will be discontinued if the
specimen reaches −51°C without plugging (see Section 13).
During the procedure, the apparatus will automatically change
the cooling bath temperature as indicated below.
Bath Temperature
Start of test −34 6 0.5°C
When (if) specimen reaches −20°C −51 6 1°C
When (if) specimen reaches −35°C −67 6 2°C
NOTE 10—A small minority of samples may exhibit anomalous aspiration behavior, which can be detected by examining the aspiration times
recorded in the test printout for signs of an unexpected reduction in the
time taken to fill the pipet, after which aspiration time again continues to
increase progressively until the failure limit of 60 s is reached.
12.2.6 If the automated CFPP apparatus used does not
incorporate a lower light sensor, it shall only be used if the test
sequence is observed as in the manual procedure (see 12.1.16),
so that any fuels not flowing back into the test jar as described
are detected and reported accordingly.