SAE ARP 6283-2018 In-Service Fiber Optic Inspection Evaluation and Cleaning Best Practices Physical Contact Termini.pdf

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1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there

2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2018 SAE International All rights reserved. No part of this p

3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497

4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/ARP6283 AEROSPACE STANDARD ARP6283 Issued 2018-01 In-Service Fiber Optic Inspection, Evaluation

5、 and Cleaning, Best Practices, Physical Contact Termini RATIONALE The Aerospace industry has always required the highest standards of workmanship to be maintained. To ensure that the Aerospace fiber optics industry adopts these same high standards, it is essential that best practice methods and proc

6、esses are followed for the in-service inspection, evaluation and cleaning of physical contact (PC) fiber optic interconnect components (termini, alignment sleeves and connectors), test equipment and test leads. TABLE OF CONTENTS 1. SCOPE 4 2. APPLICABLE DOCUMENTS 4 2.1 SAE Publications . 4 2.2 ANSI

7、Accredited Publications . 4 2.3 ARINC Publications . 4 2.4 IPC-Association Connecting Electronics Industries 4 2.5 U.S. Government Publications 5 2.6 Other Publications . 5 3. SAFETY 5 3.1 Handling 5 3.2 Eye Safety . 5 3.3 Hazardous Materials . 6 3.4 Visual Fault Locator 6 3.5 Reflectometer 6 3.6 Fo

8、reign Object Debris . 6 4. INSPECTION 6 4.1 Unaided Visual Inspection 6 4.1.1 Mated Interconnects 7 4.1.2 Unmated Interconnects . 7 4.1.3 Termini 7 4.2 Aided Inspection 7 4.2.1 Evaluation . 7 4.2.2 Aided Visual Inspection . 7 4.2.3 Levels of Contamination 7 4.2.4 Examples of Contamination 8 5. INSPE

9、CTION EQUIPMENT 13 5.1 Eye Loupe/Handheld Magnifier . 13 5.1.1 Optical Microscope 13 5.1.2 Bench Top Stereo Microscope 13 SAE INTERNATIONAL ARP6283 Page 2 of 31 5.1.3 Hand-Held Inspection Microscope 13 5.1.4 Video Inspection Microscope 14 5.2 Field of View 14 6. DEFINITIONS FOR INSPECTING END FACES

10、15 6.1 Zones 15 6.2 Definition of End Face Defects . 17 7. INSPECTION PROCEDURE 18 7.1 Preparation 18 7.2 Evaluation . 19 8. CLEANING 21 9. CLEANING EQUIPMENT AND SUPPLIES 21 9.1 Compressed Gas Duster. 21 9.1.1 Acceptable Uses . 21 9.1.2 Advantages . 21 9.1.3 Issues and Concerns 22 9.2 Lint Free Dry

11、 Wipes 22 9.2.1 Acceptable Uses . 22 9.2.2 Advantages . 22 9.2.3 Issues and Concerns 22 9.3 Swabs and Cleaning Sticks 22 9.3.1 Advantages . 23 9.3.2 Issues and Concerns 23 9.4 Cassette Cleaning Tools . 23 9.5 Mechanical Cleaning Tools . 24 9.5.1 Advantages . 24 9.5.2 Issues and Concerns 24 9.6 Solve

12、nts 25 9.6.1 Advantages . 25 9.6.2 Issues and Concerns 25 9.7 Non-Contact Solvent Based Cleaning Device 25 9.7.1 Advantage . 25 9.7.2 Issues and Concerns 25 10. CLEANING PROCEDURES . 26 10.1 Preparation 26 10.1.1 Mated Connector Assembly 26 10.1.2 Demated Connector Assembly . 26 10.1.3 Cleaning Mate

13、rials 26 10.2 Manual Cleaning Method 26 10.2.1 Wet/Dry Cleaning with Wipe or Cassette Cleaning Tool 27 10.2.2 Wet-Dry Cleaning of Exposed and Recessed Fiber Optic Termini with Swab/Cleaning Stick . 27 10.2.3 Wet/Dry Cleaning of Exposed and Recessed Fiber Optic Termini with a Mechanical Cleaning Tool

14、 29 10.3 Semi-Automated Cleaning Method . 30 10.3.1 Electrically Powered Semi-Automated Cleaning Devices . 30 10.4 Bare Fiber Cleaning 31 Figure 1 Example of a clean multimode fiber optic terminus end face . 8 Figure 2 End face contaminated with dry salt water deposits . 9 Figure 3 End face contamin

15、ated with instrument grease 9 Figure 4 End face contaminated with aircraft cleaning compound . 10 Figure 6 Endface contaminated with used hydraulic oil 11 Figure 7 Endface contaminated with petroleum grease 11 SAE INTERNATIONAL ARP6283 Page 3 of 31 Figure 8 Endface contaminated with Coolanol heat tr

16、ansfer fluid . 12 Figure 9 Endface contaminated with lubricating oil . 12 Figure 10 Example of eye loupe (left) and handheld magnifier (right) 13 Figure 11 Examples of handheld microscopes 13 Figure 12 Example of a benchtop video inspection microscope . 14 Figure 13 Examples of portable video inspec

17、tion microscopes 14 Figure 14 Visual acceptance criteria for in-service singlemode fiber optic end faces 16 Figure 15 Visual acceptance criteria for in-service multimode fiber optic end faces 17 Figure 16 Examples of terminus fiber end face defects 18 Figure 17 Disposition flowchart . 20 Figure 18 E

18、xamples of specific sized fiber optic cleaning sticks . 23 Figure 19 Example of a tape cassette cleaning tool . 23 Figure 20 Example of a mechanical cleaning tool . 24 Figure 21 Method for cleaning exposed fiber optic termini with tape cassette cleaner 27 Figure 22 Method for cleaning recessed and e

19、xposed fiber optic termini with cleaning sticks 28 Figure 23 Method for cleaning recessed and exposed fiber optic termini with a mechanical cleaning tool . 30 Table 1 Inspection zones for in-service optical fiber end faces . 15 Table 2 In-service terminus fiber end face defects 18 Table 3 Allowable

20、defects for in-service terminus end faces . 19 SAE INTERNATIONAL ARP6283 Page 4 of 31 1. SCOPE This document provides recommended best practice methods and processes for the in-service inspection, evaluation and cleaning of all physical contact (PC) fiber optic interconnect components (termini, alig

21、nment sleeves and connectors), test equipment and test leads for maintainers qualified to the approved aerospace fiber optic training courses developed in accordance with ARP5602 or ARINC807. This document also provides a decision-making disposition flowchart to determine whether the fiber optic com

22、ponents are acceptable for operation. For definitions of individual component parts refer to ARP5061. 2. APPLICABLE DOCUMENTS The following publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other public

23、ations shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific e

24、xemption has been obtained. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AIR6031 Fiber Optic Cleaning ARP5061 Guidelines for Testing and Support of Ae

25、rospace, Fiber Optic, Inter-Connect Systems ARP5602 A Guideline for Aerospace Platform Fiber Optic Training and Awareness Education AS5675 Characterization and Requirements for New Aerospace Fiber Optic Cable Assemblies - Jumpers, End Face Geometry, Link Loss Measurement, and Inspection 2.2 ANSI Acc

26、redited Publications Copies of these documents are available online at http:/webstore.ansi.org/. ANSI Z136.4 Recommended Practice for Laser Safety Measurements for Hazard Evaluation 2.3 ARINC Publications Available from ARINC, 2551 Riva Road, Annapolis, MD 21401-7435, Tel: 410-266-4000, . ARINC 805

27、Fiber Optic Test Procedures ARINC 807 Fiber Optic Training Requirements 2.4 IPC-Association Connecting Electronics Industries Available from IPC, 3000 Lakeside Drive, 309 S, Bannockburn, IL 60015, Tel: 847-615-7100, www.ipc.org. IPC-8497-1 Cleaning Methods and Contamination Assessment for Optical As

28、sembly SAE INTERNATIONAL ARP6283 Page 5 of 31 2.5 U.S. Government Publications Copies of these documents are available online at http:/quicksearch.dla.mil. MIL-DTL-38999 Connectors, Electrical, Circular, Miniature, High Density, Quick Disconnect (Bayonet, Threaded, or Breech Coupling), Environment R

29、esistant with Crimp Removable Contacts or Hermetically Sealed with Fixed, Solderable Contacts, General Specification for MIL-PRF-64266 Connectors, Fiber Optic Circular and Rectangular, Plug and Receptacle Style, Multiple Removable Genderless Termini, Environment Resisting General Specification for M

30、IL-PRF-29504 Termini, Fiber Optic Connector, Removable, General Specification For 2.6 Other Publications Telcordia GR-326-CORE Generic Requirements for Single-mode Optical Connectors and Jumper Assemblies 3. SAFETY Care should be taken to ensure that there is no active light source on the other end

31、of the interconnect fiber end face being viewed. Fiber-optic light sources generally emit infrared light which is not visible to the naked eye. Viewing a connector end face that is radiating infrared light with an optical microscope can temporarily or permanently damage your eye. It is the responsib

32、ility of every employer to preserve, so far as is reasonably practicable, the health, safety, and welfare of all employees. Common hazards often include chemicals, optical power, fiber fragments, environmental, explosive. Employers should ensure safety data sheets (SDS), first aid kits, and eye wash

33、 stations are available in all areas where fiber optic work is being conducted. Fume hoods should be utilized where applicable. General awareness of working around aircraft and other potentially explosive environments is a consideration when utilizing any arc fusion splicers, curing ovens, ultrasoni

34、c cleaners, heat guns or other electrical or electronic devices. In addition, all employees have a duty of care to their work colleagues. It is the responsibility of every employee while at work to take reasonable care for his/her own health and safety and that of other persons who may be affected b

35、y his acts or omissions at work with regard to: 3.1 Handling Care should be taken when handling fibers. Flying glass fragments are often the result of cutting and cleaving operations and often go unnoticed. Glass fibers are small enough to puncture the skin and can remain under the skin surface. Bes

36、ides being an irritant, fragments of glass fibers are not easily seen and can be difficult to remove. Eating and drinking in the fiber workplace increases the risk of accidental ingestion of glass fibers and must not be permitted. In addition, fiber fragments can adhere to skin oils so after working

37、 with fibers, individuals must ensure that their hands are thoroughly washed prior to coming into contact with the face or eyes. During installation and repair, all snipped or cleaved pieces of optical glass fibers must be placed in appropriate dedicated disposal containers. Pieces of fiber collecte

38、d on adhesive tape must be disposed in an approved sharps container (a container that stores any device or object that may puncture or lacerate the skin). Fiber waste must never be placed in ordinary garbage for routine disposal. Cables with exposed fiber ends must be adequately protected or positio

39、ned to preclude accidental skin puncture or eye damage. 3.2 Eye Safety Permanent eye damage can occur if exposed to high intensity light sources. Maintainers are unable to manually determine the nature or level of the optical power therefore; the following practices should always be adopted: Under n

40、o circumstance should a fiber optic connector end-face, fiber optic terminus end-face, prepared optical fiber or fractured optical fiber be viewed directly until it is confirmed that the there is no transmitted power through the fiber. SAE INTERNATIONAL ARP6283 Page 6 of 31 Do not inspect active fib

41、er optic systems with optical magnifying scopes. Protective end caps and connector covers should always be kept on all unmated connectors. Wherever possible protective eyewear should be worn when preparing optical fibers for termination. Refer to ANSI Z136.4 for further information regarding eye saf

42、ety and light source hazards. 3.3 Hazardous Materials All SDS information should be made available and appropriate safety and handling procedures used when working with chemicals and other hazardous materials. Unless otherwise specified or allowed in writing by the end-user, the equipment should mak

43、e no use of Lithium (Li) or Mercury (Hg) batteries, radioactive materials, asbestos, hexavalent chromium, or any other designated toxic material. 3.4 Visual Fault Locator A visual fault locator (VFL) is a visible red laser in a handheld device designed to inject light energy into a fiber and used to

44、 check the integrity of the optical link. Do not point the VFL at the eyes. Use caution when examining connectors with inspection scopes; ensure that the VFL is not connected to the fiber cable being examined. When possible ensure that aircraft systems are de-energized or optically isolated during t

45、est or maintenance, and ensure that the VFL is authorized for use on the specific platform and that all safety precautions are adhered to. 3.5 Reflectometer Fiber optic reflectometry is a method where light pulses are injected into an optical fiber and the reflected light is used to characterize the

46、 optical fiber to identify events within the optical link, or length of optical fiber. Two methods are currently used, Optical Time Domain Reflectometry (OTDR) and Optical Frequency Domain Reflectometry (OFDR). Use caution when examining connectors with inspection scopes; ensure that the reflectomet

47、er is not connected to the fiber cable being examined. When possible ensure that aircraft systems are de-energized or optically isolated during test or maintenance, and ensure that the reflectometer is authorized for use on the specific platform and that all safety precautions are adhered to. 3.6 Fo

48、reign Object Debris Fiber optic installation and maintenance may produce large quantities of debris, including packaging, wipes, fibers, and swabs which can lead to foreign object debris (FOD). It is essential that all work areas are thoroughly policed and cleaned throughout the process part 4. INSP

49、ECTION This section defines the requirements and methods for performing unaided and aided inspection and evaluation of the entire physical interconnect assembly, alignment mechanisms, and the individual fiber optic termini. All harnesses and connectors must be inspected prior to mating, this includes new out of the bag assemblies. An operator should never assume the termini end faces are clean until they have b