SUUNTO HELO2 User Manual
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Out of calculation limits
Suunto uses state of the art memory and microprocessors, however, there are limita-
tions to the memory capacity of decompression calculations. Therefore Suunto must
limit the maximum saturation of tissues on Suunto HelO2 and limit the maximum bottom
times on dives performed using the dive computer. The bottom times include decom-
pression calculation. While it is highly unlikely that the following bottom times are
confronted by open-circuit divers, it is important to warn you of their possibility.
The same limits are used in the Suunto Dive Planner and so repetitive dives will be
checked while planning a dive because a dive plan must be created in any case.
Table 5.2. Possible decompression dive times
First deep-
stop
Ceiling
Bottom time
Depth
O
2%/He%
Gas mix
46 m
33 m
250 min
60 m
20/35
Tx
65 m
50 m
260 min
80 m
15/50
Tx
80 m
61 m
120 min
100 m
12/60
Tx
96 m
73 m
90 min
120 m
10/60
Tx
Descent at the rate of 10 m/min is included in the time. The times allow for a safe ascent
using the bottom gas all the way to the surface without exceeding tissue pressures.
If a diver violates these limits, the dive computer goes to an error mode and the rest
of the dive must be conducted using the diveplan on the slate.
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