with the personal/ altitude adjustment set at A1 or A2). The no-decompression
limits are then shortened accordingly (Tables 6.1 and 6.2).
3.6 Error Conditions
The
IQ-400
is provided with warning indicators that advise the user to react to
certain situations that would otherwise give rise to a significantly increased risk
of decompression sickness if left unattended. If you do not respond to its
warnings, it will enter a permanent ERROR MODE, indicating that the risk of
decompression sickness has greatly increased. If you understand and operate
the
IQ-400
sensibly, it is unlikely that you will ever put the
IQ-400
into the
ERROR MODE.
The permanent ERROR MODE is shown by a non-blinking Er in the center
display. Once in ERROR MODE, the
IQ-400
will continue to display current
depth and dive time. You should immediately ascend to a depth of 3 to 6 m [10
to 20 ft] and remain at this depth until air supply limitations require you to
surface. When the surface has been reached, no further diving or flying should
take place for a minimum of two days.
Omitted Decompression
The most common ERROR MODE results from omitted decompression, when
the diver stays above the ceiling for more than three minutes. During this
three-minute period the Er warning will blink alternating with the
CEILING/ASC TIME display. The
IQ-400
will continue to function normally,
if the diver descends below the ceiling within three minutes.
After this the
IQ-400
will enter a permanent ERROR MODE. In the perma-
nent ERROR MODE the
IQ-400
will not show no-decompression or ascent
times. Only a permanent Er warning is shown in the center window. However,
all the other displays will function as before, to provide information for ascent.
27
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.
!
!
