Laser Interferometer Gravitational Wave Observatorysmith/LIGO II/DRD_templat… · Web viewLIGO Laboratory / LIGO Scientific Collaboration. LIGO-T00xxxx-xx-D ADVANCED LIGO mm/dd/yy

LASER INTERFEROMETER GRAVITATIONAL WAVE OBSERVATORY

LIGO Laboratory / LIGO Scientific Collaboration

LIGO-T00xxxx-xx-D ADVANCED LIGO mm/dd/yy

XXX SubsystemDesign Requirements Document

Author No.1, Author No.2, Author No. 3, …

Distribution of this document:LIGO Science Collaboration

This is an internal working noteof the LIGO Project.

California Institute of TechnologyLIGO Project – MS 18-341200 E. California Blvd.

Pasadena, CA 91125Phone (626) 395-2129Fax (626) 304-9834

E-mail: [email protected]

Massachusetts Institute of TechnologyLIGO Project – NW17-161

175 Albany StCambridge, MA 02139Phone (617) 253-4824Fax (617) 253-7014

E-mail: [email protected]

LIGO Hanford ObservatoryP.O. Box 1970

Mail Stop S9-02Richland WA 99352Phone 509-372-8106Fax 509-372-8137

LIGO Livingston ObservatoryP.O. Box 940

Livingston, LA 70754Phone 225-686-3100Fax 225-686-7189

http://www.ligo.caltech.edu/

Advanced LIGO LIGO-T00xxxx-xx-D

Table of Contents

1 Introduction_________________________________________________________________5

1.1 Purpose________________________________________________________________5

1.2 Scope__________________________________________________________________5

1.3 Definitions______________________________________________________________5

1.4 Acronyms_______________________________________________________________5

1.5 Applicable Documents____________________________________________________51.5.1 LIGO Documents_____________________________________________________51.5.2 Non-LIGO Documents_________________________________________________5

2 General description___________________________________________________________6

2.1 Specification Tree________________________________________________________6

2.2 Product Perspective______________________________________________________6

2.3 Product Functions________________________________________________________6

2.4 General Constraints______________________________________________________6

2.5 Assumptions and Dependencies____________________________________________7

3 Requirements________________________________________________________________8

3.1 Introduction____________________________________________________________8

3.2 Characteristics__________________________________________________________83.2.1 Performance Characteristics_____________________________________________83.2.2 Physical Characteristics________________________________________________83.2.3 Interface Definitions___________________________________________________83.2.4 Reliability___________________________________________________________93.2.5 Maintainability_______________________________________________________93.2.6 Environmental Conditions______________________________________________93.2.7 Transportability_____________________________________________________10

3.3 Design and Construction_________________________________________________113.3.1 Materials and Processes_______________________________________________113.3.2 Workmanship_______________________________________________________123.3.3 Interchangeability____________________________________________________123.3.4 Safety_____________________________________________________________123.3.5 Human Engineering__________________________________________________12

1.2 Assembly and Maintenance_______________________________________________13

3.4 Documentation_________________________________________________________133.4.1 Specifications_______________________________________________________133.4.2 Design Documents___________________________________________________133.4.3 Engineering Drawings and Associated Lists_______________________________143.4.4 Technical Manuals and Procedures______________________________________143.4.5 Documentation Numbering____________________________________________14

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3.4.6 Test Plans and Procedures_____________________________________________14

3.5 Logistics_______________________________________________________________14

3.6 Precedence_____________________________________________________________14

3.7 Qualification___________________________________________________________14

4 Quality Assurance Provisions__________________________________________________15

4.1 General_______________________________________________________________154.1.1 Responsibility for Tests_______________________________________________154.1.2 Special Tests________________________________________________________154.1.3 Configuration Management____________________________________________15

4.2 Quality conformance inspections__________________________________________154.2.1 Inspections_________________________________________________________154.2.2 Analysis___________________________________________________________164.2.3 Demonstration______________________________________________________164.2.4 Similarity__________________________________________________________164.2.5 Test_______________________________________________________________16

5 Preparation for Delivery______________________________________________________17

6 Preparation for Delivery______________________________________________________18

6.1 Preparation____________________________________________________________18

6.2 Packaging_____________________________________________________________18

6.3 Marking_______________________________________________________________18

7 Notes______________________________________________________________________19

AppendicesAppendix A Quality Conformance Inspections_________________________________________20

Table of TablesTable 1 Environmental Performace Characteristics_____________________________________10Table 2 Quality Conformance Inspections_____________________________________________18

Table of FiguresFigure 1 Block Diagram____________________________________________________________7

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Abstract

This technical note is being generated to provide a general outline to be followed for developing a Design Requirements Document (DRD) for the LIGO Detector Group. The following pages provide the outline, including section/paragraph numbering and headings, along with a brief explanation (and some examples) of what is to go into each paragraph.

The basis for the following outline is a combination of the IEEE guide for software requirement documentation and the MIL-STD-490A guide to requirement specification. Sections 1 and 2 particularly follow the IEEE standard. The remaining sections are more in line with the MIL-STD format, with some extras or variations that I’ve found useful in the past.

This document is a MicroSoft Word template. All instructions (guidelines and examples) in this document are in normal text, and should be deleted when an individual DRD is written. This document also shows “boilerplate” text, which should appear in every LIGO detector DRD. This boilerplate appears in this document as italic text and should not be removed from individual DRDs.

This section (Abstract) was purposely titled without using the LIGO tech document template ‘Header’ paragraph format, such that the Table of Contents of this document directly reflects the outline for a DRD.

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1 Introduction

1.1 Purpose

State the purpose of this document and intended audience.

1.2 Scope

Identify the item to be produced by name, such as Alignment Sensing and Control.

Explain what the item will and, if necessary, will not do. An example of the latter, from the CDS document is: CDS specifically does not provide: 1) Personnel safety system 2) Facilities Control System 3) etc. The point is to emphasize to reviewers what the system will not do where there may be some doubt or uncertainty.

Describe the objectives, goals of the item development.

1.3 Definitions

Define all terms used in the document as necessary to interpret its contents. For example, a CDS specification may make use of terminology, such as “real-time software”, which is subject to interpretation. This section should specifically define what “real-time software” means in the context of this document.

NOTE: This should include all standard names used in interface discussions/drawings.

1.4 Acronyms

List all acronyms and abbreviations used in the document.

1.5 Applicable Documents

List all documents referenced. Include only those expressly mentioned within this document.

1.5.1 LIGO Documents

1.5.2 Non-LIGO Documents

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2 General descriptionThis section (Section 2) should describe the general factors that affect the product and its requirements. This section does not state specific requirements; it only makes those requirements easier to understand.

2.1 Specification Tree

This document is part of an overall LIGO detector requirement specification tree. This particular document is highlighted in the following figure.

2.2 Product Perspective

This section should show how this specified item relates to the rest of a larger system. For instance, a general block diagram would go here which shows the item to be developed and its relationship to the larger system.

Figure 1 Block Diagram

2.3 Product Functions

This section should provide a summary of the functions that the specified item will perform. This should just be general statements, not the detail which will go into the requirements section (Section 3).

2.4 General Constraints

This section should give a general description of any other items that will limit the designer’s options, such as general policies, design standards, interfaces, etc. This subsection should not be used to impose specific requirements or specific design constraints on the solution. This subsection

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should provide the reasons why certain specific requirements or design constraints are later specified as part of Section 3. A CDS example for the CDS PSL document might be:

The overall CDS system is being developed using VME based systems as the standard interface. Therefore, all I/O modules being developed for the PSL will be constrained to this format.

Another general example might be:

LIGO must operate continuously, therefore this subsystem must be designed with high reliability and low mean time to repair. (Note that this is a general statement, and the MTBF and MTTR will be exactly specified in Section 3).

2.5 Assumptions and Dependencies

This section should list factors that affect the requirements i.e. certain assumptions have been made in the writing of the requirements, and, if these change, then the requirements will have to be changed. For example, it is assumed that green light wavelengths will be used as the basis for optics requirements. If this is changed to infrared, then the requirements which follow will need to change.

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3 RequirementsThis section contains the specific requirements of the product to be developed. This is the most important part of the document. It must be:

Unambiguous: every requirement listed has only one interpretation

Complete: Inclusion of all significant requirements

Verifiable: A requirement is verifiable if and only if there exists some finite cost-effective process whereby the final product can be checked/tested to meet the requirement. If no method can be devised to determine if the product meets a particular requirement, either (1) the requirement should be removed, or (2) a point in the development cycle should be identified at which the requirement can be put into a verifiable form.

Consistent: No two requirements should conflict with each other.

Modifiable: The structure and style should be such that any necessary changes can be made easily, completely, and consistently.

Traceable: Backward (references to source of requirements, such as a higher level specification, design, or standards) and Forward (unique numbering of requirements such that they can be identified/referenced in design and test documentation).

Usable during operations and maintenance: often items are modified during commissioning and maintenance periods. The requirements should specifically call out critical areas (such as failure of this component to meet this requirement can cause severe injury), and other such items, such that this fact s not lost to maintenance personnel.

3.1 Introduction

Requirements flow down tree from Detector DRD should be included in this section.

3.2 Characteristics

3.2.1 Performance Characteristics

This section should contain all functional and performance characteristics that the product must fulfill i.e. what is expected of the product.

3.2.2 Physical Characteristics

This area contains any physical requirements or constraints on the product: dimensional and weight limitations, acceptable materials or properties of the materials, durability factors, transportation and storage requirements, etc.

3.2.3 Interface Definitions

Specify all interfaces to other systems/subsystems/components and the characteristics (electrical/mechanical/optical) of those interfaces. Note that these are all requirements placed on the item specified, NOT requirements this item places on other systems.

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3.2.3.1 Interfaces to other LIGO detector subsystems

3.2.3.1.1 Mechanical Interfaces

3.2.3.1.2 Electrical Interfaces

3.2.3.1.3 Optical Interfaces

3.2.3.1.4 Stay Clear Zones

3.2.3.2 Interfaces external to LIGO detector subsystems

3.2.3.2.1 Mechanical Interfaces

3.2.3.2.2 Electrical Interfaces

3.2.3.2.3 Stay Clear Zones

3.2.4 Reliability

Mean Time Between Failures (MTBF), Availability

3.2.5 Maintainability

Mean Time To Repair (MTTR); Qualitative requirements for accessibility, modular construction, test points, etc.

3.2.6 Environmental Conditions

Environments that the equipment is expected to experience in shipment, storage, service or use. Subparagraphs should include, as necessary, climate, shock, vibration, noise, etc.

3.2.6.1 Natural Environment

3.2.6.1.1 Temperature and Humidity

Example:

Table 1 Environmental Performace Characteristics

Operating Non-operating (storage) Transport

+0 C to +50 C, 0–90 % RH 40 C to +70 C, 0–90 % RH 40 C to +70 C, 0–90 % RH

3.2.6.1.2 Atmospheric Pressure

3.2.6.1.3 Seismic Disturbance

The following example for the SEI subsystem is illustrative:

Restraint against seismically induced large motion is required.

The system shall be designed to resist the static equivalent lateral forces defined in the Uniform Building Code (UBC), 1994 edition, for a seismic zone factor Z = 0.15 (i.e. zone 2B, Hanford) and

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a structure importance factor I = 1. The support structure shall resist the seismic loads without damage. The seismic stack shall sustain the base shear motion of the support structure without collapse or release of any of the stack layers. At a minimum, failure of the actuators under these loads should not cause failure of the bellows or cause the seismic stack to “drop”; ideally the actuators would survive these loads with no damage.

As an alternative to this static equivalent load, an acceleration design spectrum for use in dynamic analysis could be used.

Interpretation of the requirement: If there is no damping or plastic deformation to absorb the seismic loading (Rw = 1), and the SEI first frequency is between 2.5 Hz and 10 Hz (i.e. at the peak), then the base shear,

Vb = (Z I C/Rw) W = (0.15 (1) 2.75/1) W = 0.4 W

or the SEI must sustain a 0.4 g lateral load. If, as in the case of the Corner Station building, Rw = 6, then, then SEI must sustain a 0.1 g lateral load.

3.2.6.2 Induced Environment

These are environmental conditions induced by equipment. The following subparagraphs list some possible categories. Remember to list the requirements both in terms of:

What the item to be designed must accept from its surroundings

What environment the item to be designed is allowed to generate

3.2.6.2.1 Electromagnetic Radiation

Electrical equipment associated with the subsystem shall meet the EMI and EMC requirements of VDE 0871 Class A or equivalent. The subsystem shall also comply with the LIGO EMI Control Plan and Procedures (LIGO-E960036).

3.2.6.2.2 Acoustic

Equipment shall be designed to produce the lowest levels of acoustic noise as possible and practical. As a minimum, equipment shall not produce acoustic noise levels greater than specified in Derivation of CDS Rack Acoustic Noise Specifications, LIGO-T960083.

3.2.6.2.3 Mechanical Vibration

Mechanical vibration from the subsystem shall not increase the vibration amplitude of the facility floor within 1 m of any other vacuum chambers and equipment tables by more than 1 dB at any frequency between 0.1 Hz and 10 kHz. Limited narrowband exemptions may be permitted subject to LIGO review and approval.

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3.2.7 Transportability

All items shall be transportable by commercial carrier without degradation in performance. As necessary, provisions shall be made for measuring and controlling environmental conditions (temperature and accelerations) during transport and handling. Special shipping containers, shipping and handling mechanical restraints, and shock isolation shall be utilized to prevent damage. All containers shall be movable for forklift. All items over 100 lbs. which must be moved into place within LIGO buildings shall have appropriate lifting eyes and mechanical strength to be lifted by cranes.

3.3 Design and Construction

Minimum or essential requirements that are not controlled by performance characteristics, interfaces, or referenced documents. This can include design standards, requirements governing the use or selection of materials, parts and processes, interchangeability requirements, safety requirements, etc.

3.3.1 Materials and Processes

Such items as units of measure to be used (English, Metric) should be listed and any other general items, such as standard polishing procedures and processes.

3.3.1.1 Finishes

Examples:

Ambient Environment: Surface-to-surface contact between dissimilar metals shall be controlled in accordance with the best available practices for corrosion prevention and control.

External surfaces: External surfaces requiring protection shall be painted purple or otherwise protected in a manner to be approved.

• Metal components shall have quality finishes on all surfaces, suitable for vacuum finishes. All corners shall be rounded to TBD radius.

• All materials shall have non-shedding surfaces.

• Aluminum components used in the vacuum shall not have anodized surfaces.

• Optical table surface roughness shall be within 32 micro-inch.

3.3.1.2 Materials

A list of currently approved materials for use inside the LIGO vacuum envelope can be found in LIGO Vacuum Compatible Materials List (LIGO-E960022). All fabricated metal components exposed to vacuum shall be made from stainless steel, copper, or aluminum. Other metals are subject to LIGO approval. Prebaked viton (or fluorel) may be used subject to LIGO approval. All materials used inside the vacuum chamber must comply with LIGO Vacuum Compatibility, Cleaning Methods and Procedures (LIGO-E960022-00-D).

The only lubricating films permitted within the vacuum are dry platings of vacuum compatible materials such as silver and gold.

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3.3.1.3 Processes

2.1.1.1.1 Welding

Before welding, the surfaces should be cleaned (but baking is not necessary at this stage) according to the UHV cleaning procedure(s). All welding exposed to vacuum shall be done by the tungsten-arc-inert-gas (TIG) process. Welding techniques for components operated in vacuum shall deviate from the ASME Code in accordance with the best ultra high vacuum practice to eliminate any “virtual leaks” in welds; i. e. all vacuum welds shall be continuous wherever possible to eliminate trapped volumes. All weld procedures for components operated in vacuum shall include steps to avoid contamination of the heat affected zone with air, hydrogen or water, by use of an inert purge gas that floods all sides of heated portions.

The welds should not be subsequently ground (in order to avoid embedding particles from the grinding wheel).

2.1.1.1.2 Cleaning

All materials used inside the vacuum chambers must be cleaned in accordance with Specification Guidance for Seismic Component Cleaning, Baking, and Shipping Preparation (LIGO-L970061-00-D). To facilitate final cleaning procedures, parts should be cleaned after any processes that result in visible contamination from dust, sand or hydrocarbon films.

Materials shall be joined in such a way as to facilitate cleaning and vacuum preparation procedures; i. e. internal volumes shall be provided with adequate openings to allow for wetting, agitation and draining of cleaning fluids and for subsequent drying.

2.1.1.2 Component Naming

All components shall be identified using the LIGO Naming Convention (LIGO-E950111-A-E). This shall include identification (part or drawing number, revision number, serial number) physically stamped on all components, in all drawings and in all related documentation.

3.3.2 Workmanship

Standard of workmanship desired, uniformity, freedom from defects and general appearance of the finished product.

3.3.3 Interchangeability

Specify the level at which components shall be interchangeable or replaceable.

3.3.4 Safety

This item shall meet all applicable NSF and other Federal safety regulations, plus those applicable State, Local and LIGO safety requirements. A hazard/risk analysis shall be conducted in accordance with guidelines set forth in the LIGO Project System Safety Management Plan LIGO-M950046-F, section 3.3.2.

3.3.5 Human Engineering

Note: For many detector subsystems, this section is not applicable.

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Specify any special or unique requirements, e.g., constraints on allocation of functions to personnel, and communications and personnel/equipment interactions. Also include any specified areas, stations, or equipment that require concentrated human engineering attention due to the sensitivity of the operation, i.e. those areas where the effects of human error would be particularly serious.

Example: Seismically isolated platforms or points must accommodate addition, removal and adjustment of equipment with a minimum of force or torque applied to the platforms. This requires that adequate space be provided surrounding the optics platform for an individual to move into proper position for the work intended. Equipment mounted to the optics platform should be provided with fasteners that can accommodate these force/torque requirements.

2.2 Assembly and Maintenance

Example:

Assembly fixtures and installation/replacement procedures shall be developed in conjunction with the SEI hardware design. These shall include (but not be limited to) fixtures and procedures for:

• SEI component insertion and assembly into the vacuum chambers without load support from the chambers

• assembly of the in vacuo components in a clean room (class 100) environment

• initial alignment of the SEI components

• installation/removal/replacement of the bellows

• installation/removal/replacement of the actuator components

• installation/removal/replacement of the SEI stage elements

3.4 Documentation

Requirements for documentation of the design, including types of documents, such as operator manuals, etc.

3.4.1 Specifications

List any additional specifications to be provided during the course of design and development, such as Interface Control Documents (ICD) and any lower level specifications to be developed.

3.4.2 Design Documents

List all design documents to be produced, including installation and commissioning plans, standards documents, etc.

Example:

• LIGO SEI System Preliminary Design Document (including supporting technical design and analysis documentation)

• LIGO SEI System Final Design Document (including supporting technical design and analysis documentation)

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• LIGO SEI Prototype/Test Plans

• LIGO SEI Installation and Commissioning Plans and Procedures

3.4.3 Engineering Drawings and Associated Lists

A complete set of drawings suitable for fabrication must be provided along with Bill of Material (BOM) and drawing tree lists. The drawings must comply with LIGO standard formats and must be provided in electronic format. All documents shall use the LIGO drawing numbering system, be drawn using LIGO Drawing Preparation Standards, etc.

3.4.4 Technical Manuals and Procedures

3.4.4.1 Procedures

Procedures shall be provided for, at minimum,

• Initial installation and setup of equipment

• Normal operation of equipment

• Normal and/or preventative maintenance

• Installation of new equipment

• Troubleshooting guide for any anticipated potential malfunctions

3.4.4.2 Manuals

Any manuals to be provided, such as operator’s manual, etc.

3.4.5 Documentation Numbering

All documents shall be numbered and identified in accordance with the LIGO documentation control numbering system LIGO document TBD

3.4.6 Test Plans and Procedures

All test plans and procedures shall be developed in accordance with the LIGO Test Plan Guidelines, LIGO document TBD.

3.5 Logistics

The design shall include a list of all recommended spare parts and special test equipment required.

3.6 Precedence

This section should list the relative importance of requirements (or goals) to be achieved by the design.

3.7 Qualification

Test and acceptance criteria.

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4 Quality Assurance ProvisionsThis section includes all of the examinations and tests to be performed in order to ascertain the product, material or precess to be developed or offered for acceptance conforms to the requirements in section 3.

4.1 General

This should outline the general test and inspection philosophy, including all phases of development.

4.1.1 Responsibility for Tests

Who is responsible for testing.

4.1.2 Special Tests

4.1.2.1 Engineering Tests

List any special engineering tests which are required to be performed. Engineering tests are those which are used primarily for the purpose of acquiring data to support the design and development.

4.1.2.2 Reliability Testing

Reliability evaluation/development tests shall be conducted on items with limited reliability history that will have a significant impact upon the operational availability of the system.

4.1.3 Configuration Management

Configuration control of specifications and designs shall be in accordance with the LIGO Detector Implementation Plan.

4.2 Quality conformance inspections

Design and performance requirements identified in this specification and referenced specifications shall be verified by inspection, analysis, demonstration, similarity, test or a combination thereof per the Verification Matrix, Appendix 1 (See example in Appendix). Verification method selection shall be specified by individual specifications, and documented by appropriate test and evaluation plans and procedures. Verification of compliance to the requirements of this and subsequent specifications may be accomplished by the following methods or combination of methods:

4.2.1 Inspections

Inspection shall be used to determine conformity with requirements that are neither functional nor qualitative; for example, identification marks.

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4.2.2 Analysis

Analysis may be used for determination of qualitative and quantitative properties and performance of an item by study, calculation and modeling.

4.2.3 Demonstration

Demonstration may be used for determination of qualitative properties and performance of an item and is accomplished by observation. Verification of an item by this method would be accomplished by using the item for the designated design purpose and would require no special test for final proof of performance.

4.2.4 Similarity

Similarity analysis may be used in lieu of tests when a determination can be made that an item is similar or identical in design to another item that has been previously certified to equivalent or more stringent criteria. Qualification by similarity is subject to Detector management approval.

4.2.5 Test

Test may be used for the determination of quantitative properties and performance of an item by technical means, such as, the use of external resources, such as voltmeters, recorders, and any test equipment necessary for measuring performance. Test equipment used shall be calibrated to the manufacture’s specifications and shall have a calibration sticker showing the current calibration status.

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5 Preparation for DeliveryPackaging and marking of equipment for delivery shall be in accordance with the Packaging and Marking procedures specified herein.

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6 Preparation for DeliveryPackaging and marking of equipment for delivery shall be in accordance with the Packaging and Marking procedures specified herein.

6.1 Preparation

• Vacuum preparation procedures as outlined in LIGO Vacuum Compatibility, Cleaning Methods and Procedures (LIGO-E960022-00-D) shall be followed for all components intended for use in vacuum. After wrapping vacuum parts as specified in this document, an additional, protective outer wrapping and provisions for lifting shall be provided.

• Electronic components shall be wrapped according to standard procedures for such parts.

6.2 Packaging

Procedures for packaging shall ensure cleaning, drying, and preservation methods adequate to prevent deterioration, appropriate protective wrapping, adequate package cushioning, and proper containers. Proper protection shall be provided for shipping loads and environmental stress during transportation, hauling and storage. The shipping crates used for large items should use for guidance military specification MIL-C-104B, Crates, Wood; Lumber and Plywood Sheathed, Nailed and Bolted. Passive shock witness gauges should accompany the crates during all transits.

For all components which are intended for exposure in the vacuum system, the shipping preparation shall include double bagging with Ameristat 1.5TM plastic film (heat sealed seams as practical, with the exception of the inner bag, or tied off, or taped with care taken to insure that the tape does not touch the cleaned part). Purge the bag with dry nitrogen before sealing.

6.3 Marking

Appropriate identification of the product, both on packages and shipping containers; all markings necessary for delivery and for storage, if applicable; all markings required by regulations, statutes, and common carriers; and all markings necessary for safety and safe delivery shall be provided.

Identification of the material shall be maintained through all manufacturing processes. Each component shall be uniquely identified. The identification shall enable the complete history of each component to be maintained (in association with Documentation “travelers”). A record for each component shall indicate all weld repairs and fabrication abnormalities.

For components and parts which are exposed to the vacuum environment, marking the finished materials with marking fluids, die stamps and/or electro-etching is not permitted. A vibratory tool with a minimum tip radius of 0.005" is acceptable for marking on surfaces which are not hidden from view. Engraving and stamping are also permitted.

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7 NotesThis section should contain information of a general or explanatory nature, and no requirements shall appear here. This could be such items as modelling data/results, R&D prototype information, etc.

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Appendix A Quality Conformance Inspections

Appendixes are used to append large data tables or any other items which would normally show up within the body of the specification, but, due to their bulk or content, tend to degrade the usefulness of the specification. Whenever an Appendix is used, it shall be referenced in the body of the specification.

Appendix 1 shall always contain a table which lists the requirements and the method of testing requirements. An example table follows. Additional appendixes can contain other information, as appropriate to the subsystem being specified.

Table 2 Quality Conformance Inspections

Paragraph Title I A D S T

3.2.1 Performance Characteristics

X

3.2.1.1 Controls Performance

X

3.2.1.2 Timing Performance‘

X X

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