Split Tear Strength – ASTM D The force per unit thickness required to tear a material. Test specimens are placed in a tensile test machine. The jaws are set. This standard is issued under the fixed designation D ; the number 1 These test methods are under the jurisdiction of ASTM Committee D-9 on. Electrical. ASTM D Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable.
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ASTM D – 05_百度文库
Care should be exercised to keep mercury from the hands. The values obtained in these tests are useful to provide data for research and development, design engineering, quality control, and acceptance or rejection under speci? If both such second specimens pass this test, the lot of cable except the length which was rejected because of failure of the?
This applies either to a straight test specimen or to one stamped out with a die, and assumes that corrugations have been removed. The use of rubber gloves astn recommended for handling specimens as in 8.
ASTM D470 – 13
Cable Outside Diameter Less than 1? For heavier specimens, cut a segment of insulation from the conductor measuring 4 in. After submersion for h, cool d4770 water to room temperature. Introduce the ozonized air from the generator to the space below this?
Size of Wire, AWG or kcmil mm2 14 2.
Your basket is empty. Place the bent specimens on their mandrels in a desiccator for 30 to 45 min after bending aatm remove surface moisture and until placed in the ozone chamber.
The bottom of the dessicator is to be? Measurement of Thickness of Specimens 9. Support the specimens in an approximately axtm plane midway between the top and bottom, with the free ends down to, but not touching, the bottom. Average all the readings taken at each temperature.
Physical tests provide useful data for research c470 development, engineering design, quality control, and acceptance or rejection under specifications. Analysis of Sample A superscript epsilon e indicates an editorial change since the last revision or reapproval. Lower the aspirator bottle until the buret is emptied.
For the tear test, six individual specimens as described in 8. Adjacent turns shall not touch each other but shall be separated about 1? With the exception of the tear tests, the test specimen shall be either a segment or sector cut with a suitable sharp instrument or a shaped specimen cut out with a die and shall have a cross-sectional area not greater than adtm. The electrical test values give an indication as to how the insulation will perform under conditions similar to those observed in the tests.
Calibrate this instrument by comparison with results obtained with the chemical method Sections 94 to Learn more about the cookies we use and how to change your settings.
The cotton must cover an area 12 in. Apply a to V dc potential between the two electrodes. Take the sample before application of the insulation shield, or remove the strippable insulation shield. Make measurements between the conductor and the water while the cable is still immersed in water and after it has been totally immersed for periods of 1, 7, and 14 days, with the same water temperature applying for each measurement.
Ozone resistance tests provide useful data for research and development, engineering design, quality control, and acceptance or rejection under speci? The conductor shield shall be removed. Therefore, tests are done on insulated or jacketed wire or cable in these test methods solely to determine the relevant property of the insulation or jacket and not to test the conductor or completed cable.
Dust the upper half of each specimen. Reduce the handling and? The exposure limits are set by governmental agencies and are usually based upon recommendations made by the American Conference of Governmental Industrial Hygienists. Tensile strength, tensile stress, and ultimate elongation Permanent set For Aging Tests: Water Absorption Test on Fibrous Coverings. A number in parentheses indicates the year of last reapproval.
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This standard has been approved for use by agencies of the Department of Defense. At the end of this period read the dial of the micrometer for: Because of this it is important to measure the concentration of ozone in the atmosphere, using commercially available monitoring devices, whenever the odor of ozone is persistently present or when ozone generating conditions continue.
The test voltage is permitted to be of either polarity. Split the specimen longitudinally with a new razor blade to a point 0. This permits easy access to the interior and also the inspection of specimens, without opening the chamber during test.
Let the solution settle and then pour off the supernatant liquid for use.
Precision and Bias