You must never surface with the SLOW warning on.
If you do this, the warning will continue to flash
until the unit deactivates itself in the normal man-
ner. This may take up to 40 hours.
3.3.4 Visual Alarms
The
IQ-400
features visual alarms to alert you when
you are approaching dangerous situations.
Potential danger situations during a dive
occurs when:
• the no-decompression dive turns into a decom-
pression dive. One arrow pointing upwards and
the ascend warning CEILING/ASC TIME will
appear (Fig.3.13).
Immediate danger happens when:
• the maximum allowed ascent rate, 10 m/min [33
ft/min], is exceeded. A blinking SLOW warning
will alternate with the depth display (Fig. 3.12).
• the ceiling depth is exceeded. A downward pointing arrow and a blinking
error warning Er will appear (Fig.3.15). You should immediately descend to
or below the ceiling. The
IQ-400
will otherwise enter a permanent error
mode in three minutes, indicated by a non-blinking Er.
• the ceiling descends to 10 m [30 ft]. A blinking error warning Er appears. You
should immediately ascend to or below the ceiling.
19
Figure 3.11
Ascent Rate Indicator
Pointer at position three:
ascent rate 9 – 11 m/min
(30 – 36 ft/min).
NO DECO
MAX
DIVE TIME
A 1
A
m
S
C
S
P
E
E
D
HIS
LOG
ALT
SET
PLAN
¡C
Figure 3.12
Ascent Rate Indicator
Pointer at position four:
ascent rate is more than
11 m/min (36 ft/min).
blinking SLOW displayed
means that the ascent
rate 10 m/min (33 ft/min)
has been violated contin-
uously. This is a caution
to slow down!
NO DECO
MAX
DIVE TIME
A 1
A
m
S
C
S
P
E
E
D
HIS
LOG
ALT
SET
PLAN
WARNING
DO NOT ATTEMPT TO DIVE FOLLOWING A
SURFACE INTERVAL DURING WHICH THE
SLOW INDICATOR REMAINS ACTIVATED!
Violation of the maximum ascent rate may
invalidate the calculations for the next dive.
!
!
NOTE
TUSA
highly recommends a safety stop at the
end of every dive in the range of 3 m – 6 m [10
ft – 20 ft] for 3 – 5 minutes.
!
!
