new temperature must be reached within 2 min 30 s of the
adjustment. Repeat the operations 12.1.9 to 12.1.10 to each
1°C decrease of the specimen temperature.
12.1.14 If the filter has not plugged when the temperature of
the specimen reaches –35°C, continue the test by using a third
cooling bath maintained at –67 6 2°C by quickly transferring
the test jar and filtration assembly to a new jacket placed on the
second cooling bath. Alternatively, for single bath apparatus,
adjust the refrigeration unit to –67 6 2°C. The new temperature must be reached within 2 min 30 s of the adjustment.
Repeat the operations 12.1.9 to 12.1.10 at each 1°C decrease of
the specimen temperature.
12.1.15 If the filter has not plugged when the temperature of
the specimen reaches –51°C, discontinue the test (see Section
13).
12.1.16 If, after cooling in accordance with 12.1.12,
12.1.13, and 12.1.14, the specimen fills the pipet to the mark in
less than 60 s, but does not flow back completely into the test
jar when the pipet is vented to atmosphere through the
stopcock (see 6.1.11) before the start of the next aspiration,
record the temperature at the commencement of the filtration as
the CFPP (see Section 13)
new temperature must be reached within 2 min 30 s of theadjustment. Repeat the operations 12.1.9 to 12.1.10 to each1°C decrease of the specimen temperature.12.1.14 If the filter has not plugged when the temperature ofthe specimen reaches –35°C, continue the test by using a thirdcooling bath maintained at –67 6 2°C by quickly transferringthe test jar and filtration assembly to a new jacket placed on thesecond cooling bath. Alternatively, for single bath apparatus,adjust the refrigeration unit to –67 6 2°C. The new temperature must be reached within 2 min 30 s of the adjustment.Repeat the operations 12.1.9 to 12.1.10 at each 1°C decrease ofthe specimen temperature.12.1.15 If the filter has not plugged when the temperature ofthe specimen reaches –51°C, discontinue the test (see Section13).12.1.16 If, after cooling in accordance with 12.1.12,12.1.13, and 12.1.14, the specimen fills the pipet to the mark inless than 60 s, but does not flow back completely into the testjar when the pipet is vented to atmosphere through thestopcock (see 6.1.11) before the start of the next aspiration,record the temperature at the commencement of the filtration asthe CFPP (see Section 13)
การแปล กรุณารอสักครู่..
