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Suunto EON Steel has color-coded alarms, warnings and notifications. They are shown prominently on the display with an audible alarm (if tones are on). Alarms are always red. Warnings may be red or yellow. Notifications are always yellow.
When an alarm, warning, or notification occurs, a message is displayed as a pop-up. Pop-up messages can be acknowledged by pressing any button. The information needing attention remains on screen or as a scrollable element in the bottom field until the situation is back to normal.
Alarms are critical events that always require immediate action. When an alarm situation comes back to normal, the alarm will stop automatically.
|Ascent speed exceeds safe speed of 10 m (33 ft) per minute for five seconds or more.|
|Decompression ceiling broken by more than 0.6 m (2 ft) on a decompression dive. Immediately descend back below ceiling depth and continue to ascend normally.|
|Partial pressure of oxygen exceeds safe level (>1.6). Immediately ascend or change to a gas with lower oxygen percentage.|
|Partial pressure of oxygen below safe level (<0.18). Immediately descend or change to a gas with higher oxygen percentage.|
Warnings alert you to events that can impact your health and safety if you do not take action. Acknowledge the warning by pressing any button.
|CNS100%||Central nervous system toxicity level at 100% limit|
|OTU300||Recommended daily limit for Oxygen tolerance unit reached|
|Depth||Depth exceeds your depth alarm limit|
|Dive time||Dive time exceeds your dive time alarm limit|
|Diluent high PO2||Diluent partial pressure of oxygen exceeds safe level (>1.6); no immediate danger unless diluent is used, e.g. for bailout|
|Diluent low PO2||Diluent partial pressure of oxygen below safe level (<0.18); no immediate danger unless diluent is used,e.g. for bailout|
|Gas time||Gas time exceeds your gas time alarm limit, or tank pressure is below 35 bar (~510psi), in which case gas time is zero|
|Safety stop broken||Safety stop ceiling broken by more than 0.6 m (2 ft)|
|Tank pressure||Tank pressure is below your tank pressure alarm limit|
Notifications indicate events that require preventive actions. Acknowledge the notification by pressing any button.
|CNS80%||Central nervous system toxicity level at 80% limit|
|OTU250||Approximately 80% of recommended daily limit for OTU reached|
|Change gas||On multi-gas dive when ascending, it is safe to switch to next available gas for optimum decompression profile|
|Low battery||Approximately three hours of dive time left|
|Re-charge needed||Approximately two hours of battery time left; re-charging required before next dive|
|Setpoint switched||Setpoint switched automatically on rebreather dive. See Setpoints|
|Tank POD low battery||Tank POD battery life low; battery change required|
There are four configurable alarms: depth, dive time, tank pressure, and gas time alarm. These alarm settings can be found under Diving settings / Alarms. Each of these alarms can have its own limit and be separately turned on or off.
Tank pressure reading turns red if it goes below 50 bar (720 psi).
Gas time reading shows zero and turns red if tank pressure goes below 35 bar (500 psi).