ANSI SCTE 33 pdf free download

ANSI SCTE 33 pdf free download.Test Method for Diameter of Drop Cable.
2. Normative References The following documents contain provisions, which, through reference in this text, constitute provisions of the standard. At the time of Subcommittee approval, the editions indicated were valid. All standards are subject to revision; and while parties to any agreement based on this standard are encouraged to investigate the possibility of applying the most recent editions of the documents listed below, they are reminded that newer editions of those documents may not be compatible with the referenced version. ●ANSI/SCTE 31 2007, Test Method for Measuring Diameter Over Core 3. Informative References The following documents may provide valuable information to the reader but are not required when complying with this standard. ●None are applicable.
5. Equipment 5.1. Gage Dial thickness gage Mitutoyo C125EB, Starrett 1O15BZ, Spi 24-361-8 or equivalent having the dial calibrated to read in .0005 inch increments, with a 0-1.000 inch travel and a spring-loaded plunger. 5.2. Micrometer Machinist’s outside micrometer having flat surfaces, both on the anvil and the end of the spindle and calibrated to read directly to at least .001 inches with each division of a width that facilitates estimation of each measurement to .000 1 inch. 6. Test Samples 6.1. Sample cut Cut the cable samples approximately two inches long for measurements using the dial thickness gage. Note: If a longer sample is used, the weight of the sample may result in erroneous measurements. 6.2. Core diameter For measurements of the core diameter refer to ANSIISCTE 31 2007.
6.3. Center conductor
Using a sharp utility knife cut approximately ½ inch of jacket, braid and dielectric from each end of the sample for measurement of the center conductor diameter.
7. Measurements
7.1. Cable jacket
Due to the softness of the cable jacket and the uneven foil tape, these methods are somewhat subjective and care must he taken when making measurements of this kind.
7.2. Sample
Prepare samples per section 6.1.
7.3. Zero out gage
Make sure the dial indicator on the dial thickness gage is at zero with the anvils completely closed. Perform the necessary adjustments to zero the gage. Hold the dial thickness gage in one hand and use the thumb lever to open the anvils. Place the center of the sample between the anvils and release the thumb lever. Without your hands being on the sample, find and record the minimum diameter reading. From the minimum reading, repeat the measurements five times around the circumference of the sample also recording the maximum. Average the six recorded readings to calculate the average diameter of the cable. Messenger cables may use oniy five total measurements.
7.4. Diameter
The diameter over the dielectric and foil may be measured using the method described in ANSIISCTE 31
2007.
Note: By definition, D is the diameter of the dielectric core before the application of any foil. Calculations of braid coverage are based on D and not the diameter over the core and foil. However, for this test procedure core diameter includes the bonded foil. This is because there is extreme difficulty in removing the foil (which is heavily bonded to the dielectric core) which makes the normal measurement impractical.
7.5. Outside micrometer
Prepare the samples per 6.3; then using the outside micrometer, measure and record the diameter of the center conductor.
8. Ovality
Ovality is defined, using the measurements of outside diameter (OD), as ODmax – ODmin.ANSI SCTE 33 pdf download.