ASTM D6660 for Freezing Point of Aqueous Ethylene Glycol Base Engine Coolants
ASTM D6660 Standard Test Method for Freezing Point of Aqueous Ethylene Glycol Base Engine Coolants by Automatic Phase Transition Method
10. Procedure
10.1 Open the test chamber lid and clean the specimen cup inside the test chamber with a cotton swab.
10.2 Use the pipette to deliver 0.15 ml ± 0.01 ml of specimen into the specimen cup. Clean the specimen out of the cup by using a cotton swab. The cup should be cleaned to the point where no visible droplets of specimen remain in the cup.
10.3 Repeat step 10.2.
10.4 Carefully measure 0.15 ml ± 0.01 ml of specimen into the specimen cup.
10.5 Close and lock the test chamber lid.
10.6 Push the "RUN" button located on the front panel of the apparatus. The specimen is cooled by the Peltier device while the appearance of solid crystals is continuously monitored by the optical detectors. The temperature of the specimen is continuously monitored and displayed on the front panel of the apparatus. Once the crystals are detected, the specimen is then warmed until all the crystals re-dissolve into the liquid phase. The measurement is automatically terminated once the freezing point is detected.
10.7 When the measurement is complete the freezing point value per D6660 will be displayed on the front panel of the apparatus.
10.8 Unlock and open the test chamber lid and clean the specimen out of the specimen cup with a cotton swab.
