BS 9215:1991 pdf free download

06-11-2021 comment

BS 9215:1991 pdf free download.Specification for Capability approval of radio frequency connector cable assemblies and radio frequency cable assemblies: generic specification, test methods, procedures, customer blank detail specification and guidance.
1.3 lerminology
For the purposes of BS 9215, the following dcflnltions apply. For the definitions of other terms, reference should be made to US 4727 and clause 2 of BS 9000: Part 1: 1989.
1.3.1 radIo frequency (r.f.) or coaxial cable assembly
A component of specified performance consisting of a length or lengths of r.f. or coaxial cable which may be either terminated or unterminated. The word ‘terminated’ Includes fitted connectors and other forms of termination such as waveguide transitions or probes. The term ‘assembly’ shall be taken to mean the processing of a cable (e.g. end preparation, preformlng or the fitting of sleeves) but does not necessarily Include the process of termination.
1.3.2 flexible cable assembly (class 1)
A cable assembly, the cable of which Is capable of repeated flexure. It usually has a braid outer conductor.
1.3.3 semi-flexIble cable assembly (class 2) A cable assembly not intended for applications requiring repeated tiexure of the cable In service but bending or forming Is permissible to facilitate Installation.
1.3.4 semI-rigid cable assembly (class 3) A cable assembly manufactured from semi-rigid cable which is preformed or set to shape. It is intended to be fitted Into a system with a minimum of bending as any bending subsequent to manufacture may degrade the performance.
1.3.5 rIgid cable assembly (class 4)
A cable assembly not Intended to be bent or flexed. Any bending or flexing may degrade the performance of the cable assembly.
1.3.6 radIo frequency cable
A cable intended for the transmission of r.f. energy.
1.3.7 InsertIon loss
The ratio of power (P1) delivered to the load connected directly to a source and the power (P0) delivered to a load when the cable assembly Is inserted between the source and the load, expressed in dedbels.
The value of the insertion loss (in dB) is given by the equation
insertion loss – 10 1og10(P1/P0) Bending moment
Mated sets of connectors shall be subjected to a bending moment in such a way that the coupling mechanism is stressed.
One of the connectors shall be fixed either by the normal means of attachment (fixed connector) or by a suitably strong clamp (free connector). The bending moment shall be produced by a force perpendicular to the connector axis at a suitable distance from the reference plane. If appropriate, a special mechanical test plug shall be used for this purpose. The force shall be applied smoothly.
NOTE. This method of producing the bending moment also causes a shearing force which may be kept small by using a long lever arm.
2.7.2 Cable tests
The following mechanical tests for if. cable may be appropriate for cable assemblies but where these tests are required, the test method and conditions shall be as given in the DS. Such tests might be:
(a) cable crushing;
(b) abrasion resistance;
(c) stress crack resistance;
(d) tear strength.
2.8 Enviromnental test methods
2.8.1 General
‘lbsts or measurements which are normally carried out following an environmental conditioning shall be omitted if the environmental conditioning forms part of a sequence. The tests or measurements shall be performed at the conclusion of the sequence. For the tests described in 2.8.6 to 2.8.8, 2.8.12 and 2.8.13, the cable assembly under test shall be terminated with connectors fitted to lengths of appropriate cable, the ends of the latter being sealed.
NOTE. The 1)5 may specify alternative anangements for particular applications (see 2.1).
2.82 Bump
The assembly shall be mounted as described in 2.2. The distances from each connector at which the cable is to be supported shall be as specified in the J)S. Provision shall be made for the monitoring of continuity of both the inner and outer conductors with equipment sufficiently sensitive to detect the period of any discontinuity specified In the DS.
The tests shall be carried out in accordance with BS 2011 : Part 2. lEb at the severity and temperature specified in the DS.
NOTE. Unless prescribed In the DS the directions of test wilt be along the major axis and In one other direction at right angles. In the case of assemblies not possessing axial symmetry, other directions may be specified.
3.1 Introduction
The procedures described in this section supplement the requirements of 88 9000: Part 6 and relate to the technology covered by this generic specification (GS).
‘lb gain CA a manufacturer Is required o:
(a) declare the design, •manufacturing and performance limits/boundaries within which he wishes to release rf. connector cable assemblies and r.f. cable assemblies to this specification;
(b) demonstrate that the assembly can be designed and manufactured within these limits/boundaries to the requirements stated in the capability manual (CM);
(c) agree with the NSI a programme of assessment to ensure that the conditions in (a) and (b) are achieved and maintained.
The manufacturer’s programme for relating his limits/boundaries to CQCs shall be agreed with the
3.2 General
3.2.1 CapabIlity manual
A capability manual shall be prepared in accordance with 3.4 of BS 9000: Part 6: 1989.
3.2.2 Capability Qualifying Components (CQCs) These ai’e a group of components and/or test pieces which collectively are used to demonstrate that the declared capability meets the requirements specified in the GS.
CQCs and their associated DSs shall be prepared in accordance with 3.5 of BS 9000: Part 6: 1989. The CQCs shall be selected after taking into consideration the appropriate limits and boundaries of approval given in 3.3 and 3.4 of this specification, and the guidance given in appendices B and C.
A CQC comprising a complete r.f. connector/cable assembly shall satisfy the appropriate minimum inspection requirements given in appendix D.
3.2.3 DemonstratIon of capability
The inspection requirements for CA and subsequent maintenance of CA are given in 3.6 to 4.6 of BS 9000: Part 6: 1989.
3.3 LImits/boundaries of approval
3.3.1 General
The manufacturer shall state the limits/boundaries of his approval which shall, where appropriate, comprise the component elements, assembly processes, dimensions, electrical/mechanical attributes and environmental conditions. Examples are given in 3.3.2 to 3.3.7. The front page is to state the total number of pages and the following.
(1) The name of the National Standards Organization under whose authority the CA is granted, i.e. British Standards Institution.
(2) The number allotted by the manufacturer to the CDS and the Issue status. The numbering shall be in accordance with 9.3.1 of BS 9000:
Part 6: 1989 for CDSs or 9.4.2 for DSs for standard catalogue items.
(3) The title of the CDS.
(4) If applicable:
(a) the name and address of the customer; (b) the customer’s reference.
(5) An outline drawing with main dimensions which are of importance for identification. More detailed drawings for inspection purposes may be given in an appendix to the CDS.
(6) The manufacturer’s name and address.
(7) A brief description. From page 2 of the CDS onwards all pages shall be numbered and shall Include the following.
(8) Requirements for marking of the assembly and package.
(9) Ordering information. Orders for connector cable assemblies shall include the following information as a minimum:
(a) the number of the CDS;
(b) the individual assembly reference number
(if applicable);
(c) the quantity;
(d) any variants andlor special requirements.
(10) Ratings and characteristics which provide information on the most important properties of the product.
(11) Supplementary information (not for inspection purposes).
(12) Additional tests andlor inspection requirements, if applicable.

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