JSS 55555 SPECIFICATIONS IN DETAIL PDF

Embed Size px x x x x The following members have been associated in approving the draft. In our efforts to achieve self reliance in vital areas of defence preparedness , the equipment developed and produced has to meet the most stringent quality standards and should fully meet the operational requirements laid down by the users. This calls for the relevant equipment specification, which is a governing document for production and supply of the equipment for the users and shall always invoke the tests and conditions laid down in this specification, to provide a common basis for comparison for performance of various electronic and electrical equipment under Service environments.

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JSS : Revision No. JSS Revision No. Brig KC Kariappa, Controller. CQAL, Bangalore. LRDE, Bangalore. DEAL Dehradun. K Singh, AGM. ITI, Bangalore. Shri H V Srinivasarao. ISSA, Delhi. Shri U K Agrawal. Col B Chatterjee. DEAL, Dehradun. Shri S K Karthikeyan, Res.

RCMA, Hyderabad. LCSO, Bangalore. Gp Capt TM Rao. Gp Capt. V K Gupta. DSC, Bangalore. Col V S Yadav. DSC, Dehradun. Maj P K Singh.

Shri V Ravi Chandran. BEL, Bangalore. Shri Bheema Shankar Rao. HAL, Hyderabad. OCF, Chandigarh. Dr Murlidharan Sc. Col R K Sharma. Dte Gen of Signals Sig Smt D Padmavathy. Savitur Prasad Sec. ADA, Bangalore. Cdr Amit Bhargava. Smt Sarika Sharma, Dy Director. Dte of Standardisation, New Delhi. Shri SG Joshi.

Shri SL Aggrawal , Controller. CQA R , Bangalore. Brig M D Subramanyam, Controller. Vikram Ahuja. Amendment pertain to S. Amended by. Page No.

In our efforts to achieve self reliance in vital areas of defence preparedness , the equipment developed and produced has to meet the most stringent quality standards and should fully meet the operational requirements laid down by the users. This calls for the relevant equipment specification, which is a governing document for production and supply of the equipment for the users and shall always invoke the tests and conditions laid down in this specification, to provide a common basis for comparison for performance of various electronic and electrical equipment under Service environments.

Keeping in view the stringent quality and operational requirements of the users, the Joint Services Specifica tion No. Considerable experience has been gained over the years since and this has necessitated revision of the existing JSS In addition Test No. This specification has been prepared by the Electronic Components Standardisation.

This specification has been approved by the Ministry of Defence and is mandatory for. Enquiries regarding this specification relating to any contractual conditions shall be addressed to the Quality Assurance Authority named in the tender or contract.

Other technical enquiries shall be referred to: -. Directorate of Standardisation Website :- www. This specification describes standard procedures and conditions for Environmental. The tests described herein are not to be interpreted as an exact and conclusive representation of actual operational and storage conditions. It is also the purpose of this document to standardize environmental tests in order to obtain, as much as possible, reproducible test results.

In some of the tests, the test conditions are varied in order to enable the designers to select the conditions which will be adequate to meet the users qualitative requirements, commensurate with the design efforts. The relevant equipment specification shall define the acceptable performance limits during and after the specified environmental tests.

While conducting any test described in Section 4 of this specification, standard procedures and conditions of tests shall be followed see clause 1. In such cases the details shall be as given in the relevant equipment specification.

This shall be borne in mind while applying any test as per this specification on the test samples. Joint Services Specifications. Revision No. Other Specifications. SI units and recommendations for the use of their. Fourth Revision Amds 1. Specification for test sieves: Part I Wire cloth test sieves. BS : Specification for Octave and MC-third Octave band- pass filter. Source of supplies. All technical enquiries regarding this document may be addressed to Ambient Temperature.

Note : 1. In practice it is taken as the average of temperatures measured at a number of points in a horizontal plane through a point 0 mm to 50 mm below the equipment at half the distance between the equipment and the wall of the test chamber or at 1 m distance, whichever is less.

If forced circulation is used in the testing of heat dissipating equipment, the concept of ambient temperature is no longer valid. Under these conditions, the testing should be based on the specification of the surface temperature or on the requirements of the relevant equipment specification. Note :. Final measurement made at the end of one test may be taken as the initial measurement for the subsequent tests.

Note : Measurement required to prove that an equipment can be regarded as non- heat dissipating, can be made in normal laboratory conditions, if care has been taken that no outside influence for example, draughts or sunlight affects the measurements.

In the case of large or complicated equipment, it may be necessary to make measurements at several points. Where called for, it is the first process in the test procedure. Temperature stability has been reached when the ratio between consecutive intervals exceeds 1.

Where the thermal time constant of the equipment is short compared with the duration of the exposure to a given temperature, no measurement is needed. Where the thermal time constant of the equipment is of the same order as the duration of the exposure, checks should be made to ascertain That non-heat dissipating Equipment are within the required limit. That for heat dissipating Equipment the ratio between two. In practice, it may not be possible to make direct measurements of the internal temperature of the equipment.

A check may then be made by measuring some other parameter which is temperature dependent and for which the law of temperature dependence is known. Preconditioning where required.

Initial measurements where required. Conditioning, including performance check when specified. Final measurements. During the visual. Standard Reference Conditions - If the parameters to be measured depend on. Air pressure. No requirement for relative humidity is given because its correction by calculation is generally not possible. Relative humidity.

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