ANSI SCTE-12-2011 pdf download Test Method for Center Conductor Bond to Dielectric for Trunk, Feeder and Distribution Coaxial Cables
3.0 EQUIPMENT
3.1 Utility knife or equivalent.
3.2 Diagonal side cutters or equivalent for cutting center conductor.
3.3 Appropriate measuring device.
3.4 Band Saw.
3.5 Tubing Cutter (Optional).
3.6 Tensile testing apparatus.
3.6.1 Shall be capable of indicating peak load attained.
3.6.2 Load scale shall be calibrated.
3.6.3 Must be capable of maintaining a rate of travel of 2 inches per minute.
3.7 Test fixture for securing cable samples to the tensile tester. See attached sketch.
3.7.1 The fixture shall be constructed so as not to flex significantly under the applied loads.
3.7.2 The fixture shall apply force evenly to the outer conductor and dielectric.
3.7.3 The fixture shall have a hole for center conductor insertion that is a minimum 1 percent larger than the center conductor size being tested.
4.0 TEST SAMPLES 4.1 Finished cable sample must be long enough to allow an undisturbed 2-inch test section and enough bare center conductor to fit through the test fixture and into tensile tester jaws. A 1-inch tail shall remain on the pull through end of the sample. Suggested sample length is 12 inches. See figure 1.
4.2 At 1 inch and 3 inches from one end of the sample, make circumferential cuts through the outer conductor. Do not cut the center conductor. The spacing between these cuts will be the 2 inch test section length. These cuts can be made with any device that gives smooth even cuts such as a band saw, hacksaw or tubing cutter.
4.3 Using a band saw, make two cuts longitudinally through the outer conductor for both ends of the sample. This will allow the outer conductor and dielectric to be removed without disturbing the test section. DO NOT cut the test section longitudinally.
4.4 After removing the outer conductor, remove the dielectric from the center conductor on both ends of the sample. No dielectric material shall extend past the outer conductor on the prepared sample. Care should be taken when removing the outer conductor so as not to twist the center conductor. This can weaken the bond between the dielectric and the center conductor.
4.5 The remaining 2 inches shall be completely intact (outer conductor, dielectric and center conductor). NOTE: Other methods of outer conductor removal may be used providing the 2 inch test section is completely intact. In the case of disc and air dielectric, care shall be taken so that the 2 inch test section contains 2 discs.
ANSI SCTE-12-2011 pdf download
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