Suunto HELO2 User Manual
Alarm reason
Alarm indication
The selected depth (3 - 120 m / 10 - 394 ft)
is exceeded.
is exceeded.
Three beeps with a one second interval for
24 seconds. Maximum depth blinks.
24 seconds. Maximum depth blinks.
The fixed maximum depth (120 m / 394 ft)
is exceeded.
is exceeded.
The selected dive time (1 - 999 min) is ex-
ceeded.
ceeded.
Three beeps with a one second interval for
24 seconds. Dive time blinks.
24 seconds. Dive time blinks.
NOTE
When the backlight is turned OFF, it does not illuminate when an
alarm is activated.
alarm is activated.
WARNING
WHEN THE OXYGEN LIMIT FRACTION INDICATES THAT THE
MAXIMUM LIMIT IS REACHED, YOU MUST IMMEDIATELY TAKE
ACTION TO REDUCE OXYGEN EXPOSURE. Failure to take action
to reduce oxygen exposure after the warning is given can rapidly in-
crease the risk of oxygen toxicity, injury, or death.
MAXIMUM LIMIT IS REACHED, YOU MUST IMMEDIATELY TAKE
ACTION TO REDUCE OXYGEN EXPOSURE. Failure to take action
to reduce oxygen exposure after the warning is given can rapidly in-
crease the risk of oxygen toxicity, injury, or death.
5.7. Error conditions
The dive computer has warning indicators that alert you to react to certain situations that
would significantly increase the risk of DCI. If you do not respond to its warnings, the dive
computer will enter an Error mode, indicating that the risk of DCI has greatly increased.
If you understand the dive computer and operate it sensibly, it is very unlikely you will ever
put the instrument into the Error mode.
Out of calculation limits
Suunto uses state of the art memory and microprocessors, however, there are limitations
to the memory capacity of decompression calculations. Therefore Suunto must limit the
maximum saturation of tissues on Suunto HelO
The dive computer has warning indicators that alert you to react to certain situations that
would significantly increase the risk of DCI. If you do not respond to its warnings, the dive
computer will enter an Error mode, indicating that the risk of DCI has greatly increased.
If you understand the dive computer and operate it sensibly, it is very unlikely you will ever
put the instrument into the Error mode.
Out of calculation limits
Suunto uses state of the art memory and microprocessors, however, there are limitations
to the memory capacity of decompression calculations. Therefore Suunto must limit the
maximum saturation of tissues on Suunto HelO
2
and limit the maximum bottom times on
dives performed using the dive computer. The bottom times include decompression calcu-
lation. 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.
lation. 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
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.
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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