6Environmental requirements#

6.1General#

The sign enclosure shall house the sign and associated control electronics, including the eTCS controller and comply with the requirements of MRTS201 General Equipment Requirements. Where installed in a tunnel and or coastal environments, the enclosure shall be made of Marine Grade Aluminium.

Additional environmental requirements are as described below:

6.1.1Weather resistance#

The display enclosure shall provide a degree of protection of not less than that required for the classification of IP65 in accordance with AS 60529, in normal service.

6.1.2Humidity control#

A system shall be provided to regulate humidity inside the display enclosure and to prevent condensation on internal components and on the inside surface of the front cover. Devices other than heaters are the preferred method.

6.1.3Temperature control#

Each eTCS shall be provided with at least one temperature sensor to measure the temperature inside the display enclosure near the top centre. The sensor shall not be mounted directly against the top face of the display enclosure. The temperature reading shall be available through the use of a protocol message via TMS. The temperature shall be in units of degrees centigrade.