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Tusa Imprex II IQ400 Manual

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Each piece of information on the display is clearly
marked (Fig. 3.8). During a no-decompression dive,
the following information will be shown:
• the available no-decompression time (a) in min-
utes is shown as NO DEC TIME. It is calculated
based on the five factors listed in Section 7.1,
“OPERATING PRINCIPLES”.
• your present depth (d) is shown in meters [ft].
• the elapsed dive time (f) in minutes in the lower
right corner, shown as DIVE TIME.
• the personal/ altitude adjustment (e) setting (A0,
A1, or A2).
In the lower left corner the following information
will alternate:
• the maximum depth during this dive (b) in meters
[ft], indicated as MAX, for about 5 seconds.
• the water temperature (c), with ˚C for Centigrade
[or ˚F for Fahrenheit], for about 3 second.
3.3.2 Reverse No-Decompression
Time Bar Graph
The available no-decompression time is also shown
visually in the multi-function bar graph in the bot-
tom of the display (Fig. 3.9). When your available
no-decompression time decreases below 60 minutes,
the first bar graph segment appears. As your body
absorbs more nitrogen, more segments start to
appear.
Green Zone (a)
As a safety precaution TUSA recommends that
divers using the IQ-400 should maintain the no-
decompression bar graph within the green zone.
Yellow Zone (b)
As all of the bars appear (yellow zone), your no-
decompression limit is less than 10 minutes and you
are getting very close to no-decompression limits. At
this point, you should start your ascent towards the
surface.
17
Figure 3.7
Time Display
The time is 10:30 (in case of
imperial unit, A for
A.M. and
P for
P.M. would be shown in
upper left hand corner of
the display). The date is
18.2 or February 18
th
.
PLEASE NOT: The date will
always be displayed with
the days of the month first,
followed by the month.
A
m
S
C
S
P
E
E
D
HISLOG ALT SET PLAN
Figure 3.8
Diving Display
The present depth is 19.3m
(63 ft) [d], the no decom-
pression time limit is 23
minutes [a] in A1 mode [e]
and the dive time is 6 min-
utes [f]. Maximum depth
during this dive 29.8m
(98ft) [b] and water temper-
ature 18°C (64°F) [c] are
alternating in the lower left
corner.
MAX
DIVE TIME
DIVE
A
m
S
C
S
P
E
E
D
HISLOG ALT SET PLAN
NO DECO
MAX
DIVE TIME
DIVE
A1
A
m
S
C
S
P
E
E
D
HISLOG ALT SET PLAN
a
b
c
d
e
f
¡C
… 19 …


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