ASTM D6892 Test Method for Pour Point of Petroleum Products (Robotic Tilt Method)
8. Sampling
8.1 Obtain a sample in accordance with Practice D4057 or Practice D4177.
8.2 Samples of very viscous materials may be warmed until they are reasonably fluid before they are tested. However, no sample shall be heated more than is absolutely necessary.
8.3 The sample shall not be heated and transferred into the test jar unless its temperature is 70°C or lower. When the sample is heated above 70°C, allow the sample to cool below 70°C before transferring into the test jar.
9. Preparation of Apparatus
9.1 Prepare the instrument for operation in accordance with the manufacturer's instructions.
9.2 Select the cooling/heating block temperature settings and the cooling/heating block change over temperature settings, in accordance with Table 1.
9.3 Clean and dry the test jar using suitable solvents.
9.4 Prepare the refrigerated circulating bath for operation and allow it to attain a temperature at least 20°C lower than the expected pour point of the sample.
10. Calibration and Verification
10.1 Ensure that all of the manufacturer's instructions for calibrating, checking, and operating the apparatus are followed.
10.2 A sample with a well-documented pour point can be used to verify the performance of the automatic apparatus. Alternatively, a sample which has been extensively tested in a pour point cross- check program can be used. Such verification materials can also be prepared from intra-company cross checks.
