What should the indicator needle show before using an Emergency Escape Breathing Device (EEBD)?

The indicator needle on an Emergency Escape Breathing Device (EEBD) should show green before use to indicate that the device is fully charged and ready for operation. A green indication signifies that the pressure within the device is at a safe level, ensuring that it will function properly when needed in an emergency situation, such as during smoke inhalation or hazardous gas exposure.

Having a properly charged and operational EEBD is critical for ensuring safety during emergencies. Devices that show red would indicate a critical safety issue, such as low pressure or a malfunctioning device, which could compromise the user's safety if relied upon. Similarly, yellow could suggest that the device is in a warning state that requires attention or may not be safe for immediate use. Blue is not a standard color used for indicator systems on EEBDs and does not denote any specific operational status. Hence, the green indicator is essential for confirming the reliability and safety of the device before it is employed.