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 D470 – 13
If d47, obtain the values from a table giving the areas of segments of a unit circle for the ratio of the height of the segment to the diameter of the circle. Maintain the vessel completely full of water during the immersion period. ASTM D von At the end of the 18 h remove the specimens from the oil and allow to rest at room temperature for a sstm of 4 6 1?
The test voltage is permitted to be of either polarity. See Test Methods D for a more complete discussion of the signi? This test provides useful data for research and development, engineering design, quality control, and acceptance or rejection under speci? Weigh the specimen to the nearest 1 mg and designate this as C.
It is usually desirable for a cable to have a high value of insulation resistance. Remove surface irregularities, such as corrugations due to stranding, etc.
Cool the specimen to room temperature. Worldwide Standards We can source any standard from anywhere in the world. Cable Outside Diameter Less than 1? Take care not to handle the insulation. This standard is subject to revision d740 any time by the responsible technical committee and asgm be reviewed every?
During and after the application of the? Control the pressure by the degree of closure of the discharge cock. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
ASTM D – 05 Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable
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. The tank contains a heater of sufficient capacity to maintain the speci?
Renew every 2 or 3 days. For cables or conditions of service where mechanical stresses govern, such as in submarine cables or long vertical risers, these minimum conductor sizes may not be strong enough. NOTE 5—The selection of the cable insulation level to be used in a particular installation shall be made on the basis of the applicable phase-to-phase voltage and the general system category as outlined in the following paragraphs: NOTE 1—Resistor values in microammeter shunt will vary with the meter used and with asttm concentration scale desired.
The conductor aatm shall be removed. Make the measurement at a voltage of to Vdc. Obtain a 15 ft 4. When this point is reached, mL of gas will have bubbled through the KI solution. Physical Tests of Insulation and Jacket Compounds. The insulation is then at the temperature of the bath as read on the bath thermometer.
ASTM D – 05_百度文库
Apply a to V dc potential between the two electrodes. Add iodine directly to the solution in the weighing tube on the balance pan until the total iodine in solution is about 0.
It also d4770 the characteristic of the insulation to minimize spread of? A convenient form of chamber is s470 glass jar, having where: BoxSouth Yarmouth, MA Calculate the percentage of absorption to 0. Application of Voltage to Cable Make the test chamber just large enough to accommodate the largest specimens for test and of a material not attacked by ozone.
Determine the amount of iodine added to the solution.
Make spot checks periodically around operations where mercury is exposed to the atmosphere. If, at any time, the water becomes dirty, or shows the presence of a surface? Take the smart route to manage medical device compliance. Direct Measurement with an Ozonometer Test at room temperature.
Average all the readings taken at each temperature. A ventilated hood is permitted if air currents do not affect the? The sequence of other testing is not speci? Insert a manometer in the outlet pipe to indicate pressure in the test chamber. Place the bent specimens on their mandrels in a desiccator for 30 to 45 min after bending to remove surface moisture and until placed in the ozone chamber.
This applies either to a straight test specimen or to one stamped out with a die, and asrm that corrugations have been removed. Ozone resistance tests provide useful data for research and development, engineering design, quality control, and acceptance or rejection under speci?
Air pressure, heat, or oxygen pressure Air oven For Oil Immersion 3 3 3 3 3 One specimen of each three shall be tested and the other two specimens held in reserve, except that when only one sample is selected all three aztm shall be tested and the average of the results reported.