SUUNTO HELO2 User Manual
Page 32
Alarm reason
Alarm indication
PO
2
value is smaller than 0.18 bar. The
depth is too shallow and the ambient
pressure is too low for the current gas.
The oxygen content is too low to keep you
conscious. You should immediately switch
the gas.
Three beeps with a one second interval
for the maximum of 24 seconds. The PO
2
value blinks.
In MIXED GAS mode, the OLF value
reaches the fixed 80% or 100%. You can
acknowledge the alarm.
Two beeps with a one-and-a-half second
interval. The OLF% value blinks if the PO
2
value is greater than 0.5 bar.
Decompression ceiling depth is exceeded.
You should immediately descend to, or
below, the ceiling.
Two beeps with a one-and-a-half second
interval for three minutes. The Er symbol
blinks and an arrow points downwards.
Mandatory safety stop is violated. You
should immediately descend.
Two beeps with a one-and-a-half second
interval for three minutes. An arrow points
downwards.
Maximum allowed ascent rate, 10 m per
min / 33 ft per min, is exceeded.
Three beeps with a one second interval
for 24 seconds. The SLOW symbol blinks.
Mandatory deep stop is violated. You
should immediately descend.
Two beeps with a one and a half second
interval for the duration of the deep stop
violation. The DEEP STOP symbol blinks
and an arrow points downwards.
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