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Suunto EON Steel User Guide - 2.5

Alarms, warnings, and notifications

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.

AlarmExplanation
AscSpeedAlertAscent speed exceeds safe speed of 10 m (33 ft) per minute for five seconds or more.
ErrorConditionDecompression ceiling or mandatory safety stop is broken by more than 0.6 m (2 ft) on a decompression dive. Immediately descend back below ceiling depth and continue to ascend normally.
alarm pO2highPartial pressure of oxygen exceeds safe level (>1.6). Immediately ascend or change to a gas with lower oxygen percentage.
alarm pO2low newPartial 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.

WarningExplanation
CNS 100%Central Nervous System Oxygen (CNS) Toxicity level at 100% limit
CNS 80%Central Nervous System (CNS) Toxicity level at 80% limit
OTU 300Recommended daily limit for Oxygen Tolerance Unit/Oxygen Toxicity Unit (OTU) reached
OTU 250Approximately 80% of recommended daily limit for Oxygen Tolerance Unit/Oxygen Toxicity Unit (OTU) reached
DepthDepth exceeds your depth alarm limit
Dive timeDive time exceeds your dive time alarm limit
Diluent high pO₂Diluent partial pressure of oxygen exceeds safe level (>1.6); no immediate danger unless diluent is used, e.g. diluent flush
Diluent low pO₂Diluent partial pressure of oxygen below safe level (<0.18); no immediate danger unless diluent is used, e.g. diluent flush
Gas timeGas time is below the gas time alarm limit you set, or tank pressure is below 35 bar (~510 psi), in which case gas time is zero.
Safety stop brokenCeiling of the voluntary safety stop broken by more than 0.6 m (2 ft)
Tank pressureTank pressure is below your tank pressure alarm limit. There is a built in 50-bar alarm that cannot be changed. In addition to it there is a configurable tank pressure alarm, you can set to any value between 10-360 bar (145-5221 psi) and your dive computer also shows an alarm when that value and 50 bar (725 psi) pressures are reached. The tank pressure number is forced onto the display and turns yellow after the value you set and red after 50 bar (725 psi).

Notifications indicate events that require preventive actions. Acknowledge the notification by pressing any button.

NotificationExplanation
Change gasOn multi-gas dive when ascending, it is safe to switch to next available gas for optimum decompression profile
Battery lowApproximately three hours of dive time left
Recharge neededApproximately two hours of battery time left; re-charging required before next dive
Setpoint switchedSetpoint switched automatically or manually on a rebreather dive. See Setpoints.
Custom setpointSetpoint switched to custom setpoint on a rebreather dive.

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