SUUNTO HELO2 - Manual (Page 31)

5.4. Dive computer limitations
While the dive computer is based on current decompression research and technology,
you must realize that the computer cannot monitor the actual physiological functions
of an individual diver. All decompression schedules currently known to the authors,
including the U.S. Navy Tables, are based on theoretical mathematical models, which
are intended to serve as a guide to reduce the probability of decompression illness.
5.5. Audible and visual alarms
The dive computer has audible and visual alarms that advise when important limits
are approached or that prompt you to acknowledge preset alarms. The table below
describes the different alarms and their meanings.
The visual information on the dive computer display is shown during the alarm breaks
in order to save battery.
Table 5.1. Audible and visual alarm types
Alarm reason Alarm indication
PO
2
value is greater than the adjusted
value. Current depth is too deep for the
gas in use. You should immediately as-
cend or change to a gas with a lower
oxygen percentage.
Three beeps with a one second interval
for the maximum of three minutes. The
PO
2
value blinks.
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