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Suunto EON Core User Guide

Alarms, warnings and notifications

Alarms, warnings and notifications

Suunto EON Core 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.
deco ceiling broken ProminentDecompression 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.
alarm pO2high CorePartial pressure of oxygen exceeds safe level (>1.6). Immediately ascend or change to a gas with lower oxygen percentage.
alarm pO2low new CorePartial 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 toxicity level at 100% limit
OTU 300Recommended daily limit for Oxygen tolerance unit 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. for bailout
Diluent low pO₂Diluent partial pressure of oxygen below safe level (<0.18); no immediate danger unless diluent is used,e.g. for bailout
Gas timeGas time exceeds your gas time alarm limit, or tank pressure is below 35 bar (~510psi), in which case gas time is zero.
Safety stop brokenSafety stop ceiling broken by more than 0.6 m (2 ft)
Tank pressure

Tank pressure is below your tank pressure alarm limit.

In addition to the configurable gas time alarm, your dive computer also shows an alarm when 75 bar and 50 bar pressures are reached. The tank pressure number is forced onto the display and turns yellow after 75 bar and red after 50 bar.

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

NotificationExplanation
CNS 80%Central nervous system toxicity level at 80% limit
OTU 250Approximately 80% of recommended daily limit for OTU reached
Change gasOn multi-gas dive when ascending, it is safe to switch to next available gas for optimum decompression profile
Low batteryApproximately three hours of dive time left
Re-charge neededApproximately two hours of battery time left; re-charging required before next dive
Setpoint switchedSetpoint switched automatically on rebreather dive. See Setpoints
Tank POD low batteryTank POD battery life low; battery change required

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