When diving at higher altitudes (above 700 m / 2300 ft), it is essential that the
entered altitude mode, i.e. maximum altitude limit of the IQ-400, exceeds or is
equal to the altitude of the dive site. The altitude mode indicator must show
either A1 or A2, depending on the altitude. More information about this is
given in Section 3.5, “High Altitude Dives and Personal Adjustment”.
Decompression Dives
7
WARNING
SET THE CORRECT
PERSONAL/ ALTITUDE ADJUSTMENT MODE!
When diving at altitudes greater than 700 m [2300 ft] the per-
sonal/ altitude adjustment feature must be correctly selected in
order for the computer to calculate no-decompression status.
The diver should also use this option to make the calculation
more conservative, whenever it is believed that factors which
tend to increase the possibility of decompression sickness exist
(see Section 3.5). Failure to properly select the personal/ altitude
adjustment mode correctly will result in erroneous data and can
greatly increase the risk of decompression sickness.
WARNING
THE IQ-400 IS NOT INTENDED FOR USE
AT ALTITUDES GREATER THAN 2400 m (8000 ft)!
Diving at altitudes above this limit may significantly increase the
risk of decompression sickness.
WARNING
DO NOT USE THIS INSTRUMENT TO CONDUCT
DECOMPRESSION DIVES!
TUSA does not recommend this instrument to be used to con-
duct decompression dives. However, if through carelessness or
emergency a diver is forced to exceed the no-decompression
limits on a dive, the IQ-400 will provide decompression infor-
mation required for ascent. After this the IQ-400 will continue
to provide subsequent interval and repetitive dive information.
