ASTM D5972-2015,Standard Test Method for Freezing Point of Aviation Fuels (Automatic Phase Transition Method)
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ASTM D5972-2015 covers the determination of the temerature below which solid hydrocarbon crystals form inaviation turbine fuels.
Preparation of Apparatus
8.1 Install the analyzer for operation in accordance with the manufacturer’s instructions.
8.2 Turn on the liquid cooling medium and ensure its temperature is appropriate for the specimen being tested in accordance with the manufacturer’s instructions (see Note 1).
8.3 Turn on the purge gas and ensure that it is regulated to the appropriate pressure in accordance with the manufacturer’s instructions.
8.4 Turn on the main power switch of the analyzer.
The apparatus shall be equipped with fittings to permit the circulation of a liquid medium to remove heat generated by the Peltier device and other electronic components of theapparatus.
6.5 The apparatus shall be equipped with fittings to permit the circulation of purge gas to purge the test chamber containing the specimen cup of any atmospheric moisture.
ASTM D5972-2015 pdf can be downloaded for free here.

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