Section 5 Instrumentation, control and alarm systems

5.1.1 The alarm system is to indicate failure of each independent ventilation system in each hold space. If a balanced ventilation system is proposed, indication of failure for each individual part is to be given. The alarm system may be integral with the machinery space alarm system or, if fitted, the refrigerated container monitoring system.

5.1.2 Alarms are to be initiated in a manned location. Where alarms are displayed as group alarms in the main machinery space alarm system, provision is to be made to identify individual alarms at a separate control panel.

5.1.3 Alarms are to give both an audible and visual warning.

5.2.1 A minimum of two temperature sensors are to be provided in each hold space carrying refrigerated containers. The sensors are to be positioned to give an indication of the mean air temperature occurring in the hold space used for the carriage of refrigerated containers. Sensors are to be positioned so as not to be directly affected by warm air from the condensers.

5.2.2 The hold temperature is to be continually monitored. Temperatures are to be recorded, either automatically or manually as a hold temperature log. If temperatures are to be logged manually, then the mean temperature in each hold space is to be recorded.

5.2.3 If the mean hold space temperature rises above the design maximum, then an alarm is to be initiated.

5.3.1 These Rules do not cover any requirements for alarm and monitoring systems fitted to containers. It is acceptable to utilise the container power supply cables to transmit signals to a suitable receiver or data logger.