YD/T 1272.3-2015 PDF in English
YD/T 1272.3-2015 (YD/T1272.3-2015, YDT 1272.3-2015, YDT1272.3-2015)
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Optical fiber connector. Part 3: Type SC
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YD/T 1272.3-2015: PDF in English (YDT 1272.3-2015) YD/T 1272.3-2015
YD
COMMUNICATION INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 33.180.20
M 33
Replacing YD/T 1272.3-2005
Optical fiber connector - Part 3: Type SC
ISSUED ON: JULY 14, 2015
IMPLEMENTED ON: OCTOBER 01, 2015
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 4
1 Scope ... 10
2 Normative references ... 10
3 Terms and definitions ... 10
4 Requirements ... 13
4.1 Classification ... 13
4.2 Interface graphics and matching dimensions ... 15
4.3 Standard connector ... 26
4.4 The end face of connector ... 27
4.5 Optical performance of connector ... 28
4.6 Material ... 29
4.7 Environmental compliance ... 29
5 Quality assessment procedures ... 30
5.1 Classification of quality assessment procedures ... 30
5.2 Appraisal approval procedures ... 30
5.3 Quality consistency inspection ... 33
6 Measurement and test ... 35
6.1 Environmental requirements ... 35
6.2 Visual inspection ... 35
6.3 Dimensions ... 36
6.4 Measurement and test conditions ... 36
6.5 Measurement of insertion loss ... 37
6.6 Measurement of return loss ... 40
6.7 Test method ... 43
7 Inspection... 54
7.1 Inspection responsibilities ... 54
7.2 Inspection classification ... 54
7.3 Exit-factory inspection ... 54
7.4 Type inspection ... 54
8 Marking, packaging, transportation, storage ... 56
8.1 Marking ... 56
8.2 Packaging ... 57
8.3 Transportation ... 57
8.4 Storage ... 57
Appendix A (Normative) Type SC/APC connector series interface ... 58
Appendix B (Normative) Type SC connector plug-type active device socket
series interface ... 63
Appendix C (Informative) Outline drawing and size of needle pin ... 71
Appendix D (Informative) Test methods of insertion loss and return loss of
pigtails and jumpers ... 72
Optical fiber connector - Part 3: Type SC
1 Scope
This Part specifies the terms, definitions, classifications, graphics, mating
dimensions, end faces, optical performance, materials and environmental
compliance requirements, test methods, quality assessment procedure,
marking, packaging, transportation, storage requirements, for Type SC optical
fiber movable connectors (hereinafter referred to as connectors).
This Part applies to Type SC optical fiber movable connector products.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) is applicable to this standard.
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1:
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
YD/T 1117-2001 Specification of all optical fiber branching devices
YD/T 2152-2010 The requirement of reliability and test methods for optical
fiber connectors
SJ/T 11363-2006 Requirements for concentration limits for certain
hazardous substances in electronic information products
SJ/T 11364-2006 Marking for control of pollution caused by electronic
information products
SJ/T 11365-2006 Testing methods for hazardous substances in electronic
information products
3 Terms and definitions
The terms and definitions as defined in YD/T 2152-2010, as well as the
following terms and definitions, apply to this document.
for toxic and hazardous substances shall be tested, in accordance with the
requirements of SJ/T 11365-2006. The results shall meet the requirements of
Table 2 in SJ/T 11363-2006.
5 Quality assessment procedures
5.1 Classification of quality assessment procedures
The quality assessment procedure includes appraisal approval procedure and
quality consistency inspection.
5.2 Appraisal approval procedures
5.2.1 Initial manufacturing stage
The initial manufacturing stage is the manufacturing stage, where the parts
constituting a single component are assembled into a type SC connector.
5.2.2 Components with similar structure
In order to implement appraisal approval procedure and quality consistency
inspection, the components with similar structure are grouped, according to the
following limits.
Components with similar structure shall:
a) It has the same mating surface size;
b) It is made of basically same material;
c) It is manufactured according to basically same design;
d) It is manufactured using basically same technology and method;
e) It adopts the same optical fiber fixing technology;
f) It adopts the same fiber optic cable fixing technology;
g) It adopts the same centering technique.
They may:
a) Use different types of optical fibers;
b) Use fiber optic cable sizes with different diameters.
5.2.3 Approval procedures
5.2.3.1 Quality inspection of fixed samples
Perform inspections in accordance with the requirements in Table 12. Once the
inspection is successfully completed, all specification products, which are
submitted as structurally similar components, will be appraised and approved.
a) Sample:
The sample, to be authenticated, shall be a complete set of connectors,
which are made of a single-mode fiber with the smallest mode field
diameter OR a multi-mode fiber with the smallest core diameter, which are
specified for the optical fiber used in the connector. After completing the
inspection of the groups "0" and "1" samples, the other groups of samples
shall be randomly selected, from the group "0" samples; THEN, they are
combined with the clean adapter samples, to form the required pigtail type
or jumper type test sample group. After placing it at room temperature for
2 hours, measure the insertion loss and return loss of each sample group,
respectively, as the initial value of the sample group before the test. The
indicators meet the requirements of serial number a, in Table 11 in clause
4.5.3.
b) Test:
Carry out the test, according to the method and sequence, which are
specified in Table 12. These samples or sample groups shall meet the
requirements of optical performance and mechanical environmental
performance, which are specified in this clause.
c) The optical cable has a smooth and bright appearance, without impurities
or damage; the printing is clear; the color conforms to the product
requirements.
6.3 Dimensions
In order to ensure the consistency of the mechanical and optical properties of
the product, in the required environment, AND to ensure its versatility and
interchangeability, the size of the mating surface of the product shall meet the
requirements of this standard.
6.4 Measurement and test conditions
6.4.1 Single-mode connector measurement and test light source
Single-mode connector's measurement and test use LD light source. The peak
wavelength is 1.31 µm/1.55 µm. In order to eliminate the influence of the
cladding mode on the measurement, a Φ30 mm small circle is made on the
pigtail, which is connected to the light source's plug. The wavelength of the light
source (the lower limit of the spectral line) shall be longer than the cut-off
wavelength of the optical fiber used.
6.4.2 Multimode connector measurement and test light source
When measuring the multi-mode connector, LED light source is used. The
wavelength at peak point is 0.85 µm/1.31 µm. Because the mode distribution
changes of the measurement system, which are caused by fiber disturbance,
will affect the measurement results, LEDs or other incoherent light sources shall
be used, whilst a mode scrambler shall be used in the pigtail, to remove
undesirable instantaneous high-order modes. The multi-mode optical fiber filter
consists of 5 tightly winding optical fibers, on a smooth mandrel. The diameter
of the mandrel is to ensure that, the instantaneous high-order modes are
attenuated, to achieve a steady-state mode. Typical mandrel diameter: 50 µm
core diameter fiber has a mandrel diameter of 18 mm; 62.5 µm core diameter
fiber has a mandrel diameter of 20 mm (if optical cable is used, the core
diameter correspondingly minus the optical cable diameter).
6.4.3 Preparation before measurement
Before measurement, use lint-free fiber paper or degreased cotton, to wipe and
clean the pin body, the end face, the inner surface of the adapter sleeve. If
necessary, use anhydrous alcohol to scrub.
connector.
6.6.2 Alternative method
The exit-factory routine measurement of products can use the alternative
method. The alternative method is usually the direct measurement by the
instrument. At present, there are "return loss measuring instruments" and
"optical time domain reflectometers (OTDR)". For specific measurement
procedures, please refer to the instruction manuals of various measuring
instruments.
6.7 Test method
6.7.1 High temperature aging test
The test steps are as follows:
a) Measure the insertion loss and return loss of the specimen, before the test;
record it as the initial value before the test;
b) Place the specimen in a thermostatic oven, which has a temperature
accuracy of ±2 °C, at a temperature of 85 °C; keep it at a constant
temperature for 168 h;
c) After the test is over, take out the specimen AND leave it at room
temperature for 2 hours; test and record the insertion loss and return loss
of the specimen;
d) After the test, the sample shall be free of mechanical damage, such as
deformation, cracking, relaxation, discoloration, etc.; its optical
performance and parameter change shall meet the requirements of serial
number b in Table 11 of clause 4.5.3.
6.7.2 Low temperature storage test
The test steps are as follows:
a) Measure the insertion loss and return loss of the specimen, before the test;
record it as the initial value before the test;
b) Place the specimen in a constant temperature freezer, which has a
temperature accuracy of ±2 °C:
- General requirements: -25 °C;
- Strict requirements: -45 °C;
- Maintain a constant temperature for 168 h.
c) After the test is over, take out the specimen AND leave it at room
temperature for 2 hours; test and record the insertion loss and return loss
of the specimen;
d) After the test, the sample shall be free from mechanical damage, such as
deformation, cracking, relaxation, discoloration, etc.; its optical
performance and parameter change shall meet the requirements of serial
number c, in Table 11 of clause 4.5.3.
6.7.3 Temperature cycle test
The test steps are as follows:
a) Measure the insertion loss and return loss of the specimen before the test;
record it as the initial value before the test;
b) According to the general requirement of -40 °C ~ +75 °C, AND the strict
requirement of -40 °C ~ + 85°C, place the specimen in a high-temperature
circulation box, which has a constant temperature of ±2 °C, as shown in
Figure 18. Keep the constant temperature, at a room temperature of 23 °C,
for 1 h. Increase the temperature, at a constant rate, for 1 h, to the
temperature Ta. Keep the constant temperature Ta for 1 h. Decrease the
temperature, at a constant rate, for 1 h, to 23 °C. Keep the constant
temperature for 1 h. Then decrease the temperature, at a constant rate,
for 1 h, to the temperature Tb. Keep the constant temperature Tb for 1 h.
Then increase the temperature, at constant rate, to room temperature
23 °C. Then keep this constant temperature for 1 h. This forms a cycle. A
total of 21 cycles (8h per cycle) are performed, totally 168 h;
c) After the test, take the specimen out; leave it at room temperature for 2
hours; test and record the insertion loss and return loss of the specimen;
d) After the test, the sample shall be free from mechanical damage, such as
deformation, cracking, relaxation, discoloration, etc.; its optical
performance and parameter change shall meet the requirements of d in
Table 11 in clause 4.5.3.
f) After the test, the sample shall be free from mechanical damage, such as
structural looseness, component falling off, deformation, cracking,
relaxation, etc.; its optical performance and parameter change shall meet
the requirements of serial number g in Table 11 of clause 4.5.3.
6.7.7 Bending test
This test is only for the optical fiber connector of the optical cable type and
butterfly optical fiber cable. The 0.9 mm tight-buffered fiber type and 0.25 mm
bare fiber type optical fiber connectors are not applicable.
The test steps are as follows:
a) Measure the insertion loss and return loss of the specimen before the test;
record it as the initial value before the test;
b) Fix the specimen on the test arm of the dedicated optical fiber movable
connector test device (as shown in Figure 20); wind the optical fiber cable
at the end of the specimen, around the winch, as shown in Figure 20;
c) Apply a load of 0.9 kg on the winch, which is wrapped with the fiber optic
cable at the end of the connector;
d) Rotate the test arm 100 times, at 0°, 90°, 0°, -90°, 0°;
e) After the bend test is over, remove the specimen AND place it at room
temperature for 2 hours; then test and record the insertion loss and return
loss of the specimen;
f) After the test, the sample shall be free from mechanical damage, such as
structural looseness, component falling off, deformation, cracking,
relaxation, etc.; its optical performance and parameter change shall meet
the requirements of serial number h in Table 11 of clause 4.5.3.
7 Inspection
7.1 Inspection responsibilities
The type SC connector shall be inspected by an independent quality inspection
department, according to the requirements of this Part, AND issued with a
certificate, before leaving the factory.
7.2 Inspection classification
There are two types of inspections for the type SC connectors: Exit-factory
inspection (handover inspection) and type inspection.
7.3 Exit-factory inspection
7.3.1 Ex-factory inspection classification
The exit-factory inspection is divided into two types: Routine inspection and
sampling inspection.
7.3.2 Routine inspection
Routine inspection is the inspection, which is performed by the manufacturer,
on all products. The inspection data shall be submitted to the user, along with
the product. The items that need to be subject to routine inspection, for type SC
connectors are: appearance, size, end face, insertion loss, return loss.
7.3.3 Sampling inspection
Sampling inspection is an inspection, which is conducted by the quality
inspection department, by sampling complete products or samples, in a certain
proportion, from mass production or products, in different periods. Sampling
inspection of type SC connectors shall be carried out in accordance with the
provisions of 5.2.3.
7.4 Type inspection
7.4.1 Inspection conditions
Type inspection shall be carried out for the type SC connectors, in one of the
following situations:
a) When the product is finalized or has been trans-planted;
b) After formal production, where there are major changes in structure,
materials, processes, that may affect the product performance;
c) When production is restored, after 12 months of long-term suspension;
d) When there is a big difference between the exit-factory inspection result
and the type inspection at the time of appraisal;
e) 24 months after normal production;
f) When the national quality supervision agency puts forward a requirement
for type inspection.
7.4.2 Type inspection requirements
Before the type inspection, test the performance parameters of the samples,
according to the requirements of 6.5 and 6.6; record the test results.
7.4.3 Inspection items and sampling plan
The inspection items And the sampling plan for type inspection are as shown in
Table 14.
7.4.4 Determination of unqualified products
After each test, if the sample has the following conditions, it is judged as
unqualified. The allowable number of failures, after the test of each grouped
sample, is 0.
a) After the completion of each test, the judgment of the unqualified optical
index shall be carried out, in accordance with the provisions of clause
4.5.3. If any one of the tests does not meet the requirements, the batch
shall be judged as unqualified.
b) After the completion of each test, the sample has mechanical damage,
such as structural looseness, component shedding, cracks, deformation,
cracks, fading, jamming, component misalignment, etc.
c) After the completion of each test, observe the front end surface of the pin
body, under a 100x microscope; there are phenomena such as
deformation, blistering, roughness, peeling, dust.
7.4.5 Resubmission of unqualified batches
When any inspection batch, which is submitted for type inspection, meets any
of the grouping requirements, which are specified in 7.4.4, it shall take
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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