Hot set test equipment technical parameters: station; two-station weight: 1,2,5,10,20,50g 150mm stainless steel ruler Material: stainless steel Weight: about 2kg test sample: sample preparation and measurement of the cross-sectional area Each sample was cut out to try two insulating sheath-like sections and sample segment, test after test methods for sample preparation and measurement of cross-sectional area according to GB / T2951.1 Chapter 9 regulations. Dumbbell specimens shall, after removing all the ridges and or semi-conductive layer removed from the inner insulation and jacketing system. Specimen thickness should not be less than 0.8mm, is not greater than 2.0mm. If not possible to prepare a test piece thickness of 0.8mm, it is allowed a minimum thickness of 0.6mm. Test equipment: 1. The test shall be carried out in an oven, such as GB / T2951.2-1997 provisions of Section 8.1 of. Test temperature according to the relevant product standard cable provisions of the relevant material. 2. Each specimen in the oven should be suspended on the chuck, chuck grip with lower and lower chuck heavier objects. NOTE: When using a tubular specimen fixing chuck, the specimen should not make both ends tightly closed. Realized by any suitable method, such as the end of the specimen in a short metal needle is inserted, the size slightly smaller than the inner diameter of the specimen. Test procedure: 1. Specimens should be suspended in the oven, under the chuck heavier objects. The force generated by the relevant product standard cable provisions of the relevant material. 2. In the oven for 15min measured distance between the marker lines and calculate elongation. If the oven does not have to open the door while the observation window measurements, you should open the door after the measurement is completed within 30s. The oven temperature by the relevant product standard cable provisions of the relevant material. In case of dispute, the oven test should be conducted with a viewing window, and do not open the door measurements. 3. Then lift the tension (lower jaw at the sample cut) from the specimen, and the specimen at a specified temperature recovery 5min. Then remove the specimen from the oven, and slowly cooled to room temperature, measuring the distance between the marker lines again.