4.2 Calibration
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1370 – Guidelines for the Design, Construction and Testing of Fixed Hydrocarbon Gas Detection Systems – (22 June 2010) - Annex – Guidelines for the Design, Construction and Testing of Fixed Hydrocarbon Gas Detection Systems - 4 Maintenance and Calibration - 4.2 Calibration

4.2 Calibration

  4.2.1 The system should be designed to permit onboard calibration by the crew.

  4.2.2 Calibration of the detector should be performed with a zero calibration gas and a span calibration gas.

  4.2.3 The span calibration gas should be:

  • .1 methane, for systems intended for sensing methane and hydrocarbon mixtures containing methane;

  • .2 propane for systems intended for sensing hydrocarbon mixtures not containing methane; or

  • .3 the actual gas or a chemically similar gas with a comparable flammable range.

  4.2.4 The concentration of the span gas used for calibration should be equal to the alarm setpoint as defined in paragraph 1.2.1, or as determined by the Administration.

Parent topic: 4 Maintenance and Calibration
Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.