CERTIFICATION NOTES No.2.4
ENVIRONMENTAL TEST SPECIFICATION FOR INSTRUMENTATION AND AUTOMATION EQUIPMENT MAY 1995
DETNORSKE VERITAS CLASSIFCCATION AS Veritasveicn I, N- 1322 Hovik, Norway Tel.: +47 67 57 99 00 Fax: +47 67 57 99 11
FOREWORD DET N ORSKE VERITAS ( DNV) is an autonomous and
independent Foundation with the object of safeguarding lifo, property and the environment at sea and ashore. Dr.-r NORSKE VERITAS CLASSIFICATION AS (DNVC), a fully owned subsid~ary Society of the Fcundation, undertakes classification and certification and ensures the quality of ships, mobile offshore units, fixed offshore structures, facilities and systems, and carries out research in connection with these functions. The Society operates a world-wide network of survey stations and is authorised by more than 120 national administrations to carry out surveys and, in most cases, issue ce11ificates on their behalf.
Certification Notes are publications which contain principles, acceptance criteria and practical infonnation related to the Society'sconsideration of objects, personnel, organizations, services andoperations, in connection with issuance of certificates or declarations, which are not necessarily related to ciassificat1on. .An updated list of Certification Notes is available on request. The list is also given in the latest edition of thelntroduction-booklets to the"Rules for Classification of Ships", the"Rules for Classification of Mobile Offshore Units" and the"Rules for Classification of High Speed and Light Craft". In "Rules for Classification of Fixed Offshorelnstallations", only those Certification Notes which arerelevant for this type
of structure have been listed.
© Det Norske V critas 1995
Data processed and typeset by Division Ship and Offshore, Det Norske Veritas Classification AS Printed in Norway by Det Norskc Veritas 5.95.2000 It is agreed thnl save as provided below Oet Norskc Veritas, ilS subsidiaries, bodies, officers, dircctors1 em
yees and agents shall ha no liability for any loss, damage or expense allegedly ~used directly or indirectly by their mistake or negligence, brencn of w nty, or ru1y other a , omission or error by them, including gross negligence or wilful misconduct by any such person with the exception of gross 11egligc e or wilf"ul mis niluct b~ the governing bodies or senior executive officers of Del Norske Vcrltos. 'flus applies regardless of wh1:illcr the loss, domage or · pense has ected anyone with whom Oct Norskc Vcritns has a contract or o third_Q_arty who has acted or relied on decisions made or information given b r on b Jr of Oet l'lorske Veritas. • · ·~ . :.... i... - - ... i.~h .. i+- n f However if any person uses the services or·oet Norske Vcritas or its subsidiaries or relics on any decision --'· -- · them and' in consequence suffers a loss, damage or expense P.roved lo be due to their negligence, omission oi Det /N orske V 't way of com~nsat1on to such person a sum representing Fiis proved loss. • In the cvcnf Oct Norske Ver en as accordance with the sections above, the amount of compensalion shall under no circumstances exceed th< B' . fcarticular service, decision, advice or infonnation. • Under no circumstances whatsoever shall the individual• Jbhoteket r~~~a~,~:i~o~s1~~~~~aften~~li~ ~~l~va~ t~Ji~;l~~'. that any provision in this section shall be invalid under ll~l
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CONTENTS I. General Conditions .......................................................... 4 1.1 Scope ......................... ....... ................ ............................... 4 1.2 Reference to Rules and Regulations .... .... ........................ 4 1.3 Definitions ........................................ .. .......... ....... ........ .... 4 1.4 Procedures for Type Approval. ........... ............................4 2. Information on Environmental Testing and Testing arrangement......................................................................... 4 2. L General .............................. .............................................. 4 2.2 Location classes ........................................................ ....... 4 2.3 Testing Arrangement ....................................................... 6 3. Environmental Test Specification ..................... ............. 6 3. 1 General ............................................................... ... .......... 6 3.2 Visual Inspection .......... ..... .... .................... ...................... 6 3.3 Performance Test ..... .......... ....................................... ....... 7 3.4 Electrical Power Supply Failure Test .............................. 7 3.5 Power Supply Variation Tests ......................................... 7 3.6 Vibration Tests .... ....... .. ................................................... S 3.7 Dry Heat Test ................................................................ 10
3 .S Damp Heat Test ..... .. .. ...... ...... .... ... ........................ ... ...... L1 3.9 Cold Test ........................... ..... .. ...................................... 12 3.10 Salt Mist Test ......................................... ............ .......... 13 3. 1 I Inclination Test ............................................................ 13 3. 12 Insulation Resistance Test.. ............................. ............. 13 3. 13 High Voltage Test ........................................... ............. 14 3. 14 Electromagnetic Compatibility Tests ........................... 14 3. LS Acceleration Test ......................................................... 17 3. 16 Additional Tests ................................................. ....... .. . 17 4. Appendix A. Procedures for type approval. ............. 18 4.1 Scope ...................... .. .. .... .......... ................ ...... ..... ........... 18 4 .2 Design Assessment .... ... .. ................. .... ........ .. ................ l 8 4 .3 Type Approval Certificate ................... .......................... 18 4.4 Register of Type Approved Products ...... ........... ............ 18 4. 5 Application for Type Approval... ........ ..................... ...... 18 4.6 Type Approval Fees ....................................................... 18 4.7 Design Assessment and Data for Instrumentation and Automation Equipment .............. .... ...................................... 18
DET NORSKt:: V ERIT AS
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Certification Notes - No.2.4 May l99S The environmental tests specified in 3 .1 - 3 .11 are general for all instrumentation and automation equipment, while 3.12. - 3. 15. specify test procedures to be followed when such tests are required.
1. General Conditions 1.1 Scope I. J. l This test specification apply to all instrumentation and automation equipment (hydraulic, pneumatic, electrical, electromechanical and electronic equipment, including computers and peripherals). 1.1.2 The scope of the tests required for a specific product will be detennined on a case by case basis by DET NORSKE VcRITAS (DNV) depending on the product, its use and the type of application to which it belongs. 1. 1.3 DNV reserves the right, in justifiable cases, to request the performance of additional tests.
1.2 Reference to Rules and Regulations I .2.1 These requirements are based on
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IBC publication 92-504, "Electrical installations in ships, part 504: Special features, control and instrumentation"; !ACS Unified Requirements EJO, "Unified environmental test specification for testing procedure for electrical, control and instrumentation equipment, marine computers and peripherals covered by classification". DNV Rules for Classification, Part 4 Chapter 5, "Instrumentation and Automation";
J .2.2
As an alternative to the requirements speci fi ed in 1.2.1. , and at the applicant's request, nautical equipment can be tested and approved in accordance with lEC publication 945, "Marine navigational equipment, general requirements methods of testing and required test results". 1.2.3 Standards other than those specified in 1.2.1. may be recognised, provided that they are equivalent.
1.3 Definitions For definitions, refer to DNV Rules for Classification, Part 4 Chapter 5, "Instrumentation and Automation", Sec.1 B.
Item 3. 16 lists additional tests which may be required. Test procedure for these tests are to be agreed with DNV on a case by case basis.
2.2 Location classes 2.2.1 Introduction The influence of the ambient environment on instrumentation and automation equipment, will depend on the field of application on board. Environmental testing therefore implies tests being directly related to intended location on board as additional to general tests being not directly related to location. The different areas of location, are defined by a temperature class, a vibration class and an enclosure class. Upon installation on board, it is to be ensured that each of the three location classes stated for the equipment in question, meets the minimum location class required for the actual location.
2.2.2 How to Select Location Classes 2.2.2.1 Instrumentation and automation equipment
Location classes may be selected directly !Tom Table 2.2 below, which specifies minimum required equipment specification and tests related to various locations on board. However, as a guide to select relevant combinations of the three location classes, Table 2.1 may be used as follows: -
1.4 P roceddres for Type Approval. The test specification found in this document is part of the type approval procedures. For more information on procedures for type approval, see appendix A.
2. Information on Environmental Testing and Testing arrangement 2.1 Genera l The environmental testing is to be carried out to an extent which is sufficient to verify compliance with the manufacturer's equipment specification, DNV Rules where applicable, and for satisfactory operation in environments nonnally to be expected on board.
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From column 1 in Table 2.1, select main areas on board which are relevant for the equipment's intended field of application. From column 11, select actual location within rhc main areas selected from column 1. The actual locations are to be selected separately for each of the three parameters temperature, vibration and enclosure. Required location class for each of the three parameters, related to location, are then given by a cross reference between column I and TI.
Minimum required equipment specification for the location classes selected, as well as the corresponding tests in Section 3 which are to be carried out, may now be obtained from Table 2. 2. Note: Tests listed in Table 2. 3 are to be carried out independent of location on board.
DET N ORSKE VERITAS
Certification Notes - No.2.4 May 1995
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Columnll
Column l MAIN AREAS ON BOARD
Parameters
·1·emperature
Vibration
Enclosure
Luca/ion
Machinery
Control room,
within main area
spaces
Accommodation
Insi
