Part 3 – Specification for Environmental Testing for Approval of Ballast Water Management Systems

  3.1 The electrical and electronic sections of BWMS in the standard production configuration should be subjected to the programme of environmental tests set out in this specification at a laboratory approved for the purpose by the Administration or by the competent authority of the manufacturer’s home country.

  3.2 Evidence of successful compliance with the environmental tests below should be submitted to the Administration by the manufacturer together with the application for type approval.

  3.3 Equipment should operate satisfactorily on completion of each of the operating environment tests listed below.

  3.4 A resonance search should be made over the following ranges of oscillation frequency and amplitude:

• .1 2 to 13.3 Hz with a vibration amplitude of 1 mm; and

• .2 13.2 to 80 Hz with an acceleration amplitude of 0.7 g.

 This search should be made in each of the three orthogonal planes at a rate sufficiently low to permit resonance detection.

  3.5 The equipment should be vibrated in the above-mentioned planes at each major resonant frequency for a period of two hours.

  3.6 In the absence of any resonant frequency, the equipment should be vibrated in each of the planes at 30 Hz with an acceleration of 0.7 g for a period of two hours.

  3.7 After completion of the tests specified in paragraph 3.5 or 3.6 a search should again be made for resonance and there should be no significant change in the vibration pattern.

  3.8 Equipment that may be installed in exposed areas on the open deck, or in an enclosed space not environmentally controlled should be subjected, for a period of not less than two hours, to:

• .1 a low temperature test at -25^oC and

• .2 a high temperature test at 55^oC

  3.9 Equipment that may be installed in an enclosed space that is environmentally controlled including an engine-room should be subjected, for a period of not less than two hours, to:

• .1 a low temperature test at 0^oC and

• .2 a high temperature test at 55^oC

  3.10 At the end of each of the tests referred to in the subparagraphs above, the equipment should be switched on and it should function normally under the test conditions.

  3.11 Equipment should be left switched off for a period of two hours at a temperature of 55^oC an atmosphere with a relative humidity of 90%. At the end of this period, the equipment should be switched on and should operate satisfactorily for one hour under the test conditions.

  3.12 Equipment that may be installed in exposed areas on the open deck should be subjected to tests for protection against heavy seas in accordance with 1P 56 of publication IEC 529 or its equivalent.

  3.13 Equipment should operate satisfactorily with:

• .1 a voltage variation of +/- 10% together with a simultaneous frequency variation of +/- 5%; and

• .2 a transient voltage of +/- 20% together with a simultaneous frequency transient of +/- 10%, with a transient recovery time of three seconds.

  3.14 The BWMS should be designed to operate when the ship is upright and when inclined at any angle of list up to and including 15° either way under static conditions and 22.5^o under dynamic conditions (rolling) either way and simultaneously inclined dynamically (pitching) 7.5^o by bow or stern. The Administration may permit deviation from these angles, taking into consideration the type, size and service conditions of the ship and operational functioning of the equipment. Any deviation permitted is to be documented in the Type Approval Certificate.

  3.15 The electrical and electronic components of the equipment should be of a quality guaranteed by the manufacturer and suitable for their intended purpose.