ANSI SCTE 103 pdf free download
ANSI SCTE 103 pdf free download.Test Method for DC Contact Resistance, Drop cable to“F”connectors and F 81 Barrels.
6.2
CONNECTOR TO CENTER CONDUCTOR CONTACT
Cable fbr the test sample should be two samples 12” ± 0.125” long each. The “F Male connectors should be installed onto one end of each cable using the manufacturer’s recommended instruction and tools. Install the connectorized samples on the inline “F” female splice and tighten to manufacturers recommendations.
2” ± 0. 125” of the jacket. outer shield(s) and dielectric shall be removed to cleanly expose the center conductor on each non-connectorized end.
The test sample may be pre-conditioned prior to testing, i.e., temperature cycled, humidity cycled, etc.
6.3 SHIELD, CONNECTOR AND CENTER CONDUCTOR CONTACT (LOOP)
Cable for the test sample should be cut to 12” ± 0.125” long. A “F’ Male connector should he installed onto one end of the cable using manufacturer recommended instruction and tools. The “F’ female splice should be installed into the F-Connector and tightened to manufacturer recommendations. A jumper should be constructed to connect between the outer surface of the F Female splice and the center contact of the splice. It may be useful to use a length of 18 AWG, solid copper wire with an appropriately sized lug soldered onto one end, attached to the threaded portion of the splice and the other end inserted into the center contact..
2” ± 0.1 25”of the jacket on the non-con nectorized end shall be removed
The exposed braid should be folded back over the jacket.
1.5 “+1- 0.125” of the dielectric should be removed to cleanly expose the center conductor.
The test sample may be pre-conditioned prior to testing, i.e., temperature cycled, humidity cycled, etc.
7.0 EQUIPMENT
7.1 Ammeter — Capable of measuring 0 — 10 Amperes with a full-scale accuracy of
2% maximum, CEN-TECH Model number P37772 or equivalent.
7.2 Digital Multirneter — Capable of measuring the voltage range with an accuracy of
1% maximum, Fluke DMM Model number 5050A or equivalent.
7.3 DC Power supply capable of delivering current up to 10 Amperes. with a full- scale accuracy of 2% maximum, EPSCO DC power supply Model Number EFB 15 or equivalent.
7.4 Load tester, 500 Ampere Chicago Electric Model 91129 or equivalent
8.0 PROCEDURE
Turn on the test equipment and allow an adequate warm up period in accordance with the equipment manufacturers instructions. Ensure surface oxides and films that are in the paths of contact be kept to a minimum for stability of test results.
8.1 CONNECTOR TO SHIELD CONTACT
The intent of the setup is to pass steps of 2, 4 and 6 amperes through the cable shield, the cable-to-connector interface and the connector and measure the voltage drop across the interface.
One alligator clip from the DC Power supply shall be placed on the threaded portion of the inline splice, the other alligator clip shall be placed on the cable outer conductor. It may he desirable to twist the braid wires together in order to provide better contact.
One alligator clip from the Voltmeter shall be placed on the threaded portion of the inline splice, the other alligator clip shall be placed on the cable outer conductor.
8.2 CONNECTOR TO CENTER CONDUCTOR CONTACT
The intent of the setup is to pass steps of 2, 4 and 6 amperes through the cable center conductor, the connector and the cable-to-connector interface and measure the voltage drop across the interface.
The alligator clips from the DC Power supply shall be placed on each of the twounconnectorized cable center conductor ends of the test sample.
Similarly, the alligator clips from the Voltmeter shall be placed on each of the two-unconnectorized cable center conductor ends of the test sample.ANSI SCTE 103 pdf free download.
