Part 2 - Specification for Environmental Testing for Type Approval of the Oil Content Meter and the Control Section of an Oil Discharge Monitoring and Control System
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Marine Environment Protection Committee - Resolution MEPC.108(49) - Revised Guidelines and Specifications for Oil Discharge Monitoring and Control Systems for Oil Tankers - (Adopted on 18 July 2003)Amended by Resolution MEPC.240(65) - Annex - Revised Guidelines and Specifications for Oil Discharge Monitoring and Control Systems for Oil Tankers - Annex - Part 2 - Specification for Environmental Testing for Type Approval of the Oil Content Meter and the Control Section of an Oil Discharge Monitoring and Control System

Part 2 - Specification for Environmental Testing for Type Approval of the Oil Content Meter and the Control Section of an Oil Discharge Monitoring and Control System

Parent topic: Annex

2.1 General

  2.1.1 The specification for environmental testing for type approval relates to the electronic section of the oil content meter and the control section of a monitoring and control system. A control section may be an independent unit or be combined with the electronic part of the oil content meter.

  2.1.2 The equipment tested should comply with all the relevant requirements contained in section 5 of the Guidelines and Specifications.

2.2 Test specifications

  2.2.1 Testing requirements

The electrical and electronic section of the oil content meter and the control section of the monitoring system 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. A copy of the environmental test document, in a format similar to that specified in paragraph 3.2 of this specification, should be submitted to the Administration by the manufacturer together with the application for type approval.

  2.2.2 Test specification details

Equipment should operate satisfactorily on completion of each of the following environmental tests:

  • .1 Vibration tests

    • .1.1 a search should be made for resonance over the following range of frequency and amplitude or acceleration:

      • .1.1.1 2 to 13.2 Hz with an amplitude of ±1 mm; and

      • .1.1.2 13.2 to 80 Hz with an acceleration of ±0.7 g;

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

    • .1.2 the equipment should be vibrated in the planes at each major resonant frequency for a period of two hours;

    • .1.3 if there is no resonant frequency, the equipment should be vibrated in each of the plans at 30 Hz with an acceleration of ±0.7 g for a period of two hours;

    • .1.4 after completion of the tests specified in .1.2 or .1.3 of this paragraph a search should again be made for resonance and there should be no significant change in the vibration pattern;

  • .2 Temperature tests

    • .2.1 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:

      • .2.1.1 a low temperature test at –25oC; and

      • .2.1.2 a high temperature test at 55oC;

    • .2.2 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:

      • .2.2.1 a low temperature test at 0oC; and

      • .2.2.2 a high temperature test at 55oC;

      At the end of each of the tests referred to in this subparagraph above, the equipment should be switched on and it should function normally under the test conditions;

  • .3 Humidity tests

    Equipment should be left switched off for a period of two hours at a temperature of 55oC in an atmosphere with a relevant humidity of 90%. At the end of this period, the equipment should be switched on and should operate satisfactorily for one hour;

  • .4 Tests for protection against heavy seas

    Equipment that may be installed in exposed areas on the open deck shall be subjected to tests for protection against heavy seas in accordance with lP 56 of IEC publication 529 or its equivalent;

  • .5 Fluctuation in power supply

    • .5.1 Equipment should operate satisfactorily with:

      • .5.1.1 a voltage variation of ±10% together with a simultaneous frequency variation of ±5%;

      • .5.1.2 a transient voltage of ±20% together with a simultaneous frequency transient of ±10%, with a transient recovery time of three seconds;

  • .6 Inclination test

    Equipment should operate satisfactorily at angles of inclination up to 22.5oC in any plane from the normal operating position;

  • .7 Reliability of electrical and electronic equipment

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

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