invisible marine growth that may create an unwant-
ed electric current between the water contacts. It is
therefore important that the
IQ-400
be carefully
washed in fresh water after the day’s diving is com-
pleted. The contacts can be cleaned with a soft pen-
cil eraser.
3.2 Before Diving
3.2.1 Activation, Prechecks and Battery
When deactivated the time display is always shown.
Once activated all display elements will turn on
(showing mostly figure 8’s and graphical elements)
(Fig. 3.2). A few seconds later the battery power bar
graph is shown (Fig. 3.3). Next, the screen will alternate between two READY
displays, confirming that the activation is complete (Fig. 3.4). At this time,
perform your precheck making sure that:
* the
IQ-400
operates and provides a complete display
* the low battery indicator is not on
* the personal/ altitude adjustment setting is correct
The
IQ-400
is now ready for diving. If the
IQ-400
is not taken on a dive after
activation, it will automatically switch off to the time display in 10 minutes to
conserve the battery power.
The
IQ-400
does not need to be reactivated for repetitive dives. It will remain
active until it has calculated that all residual nitrogen has off-gassed. This may
take up to 48 hours, as described in Section 6.1, “Operating Principles”.
13
WARNING
The
IQ-400
is always ready for use and will acti-
vate if submerged. However, it is necessary to
turn it on before diving to check the personal/
altitude adjustment setting, battery power, etc.
This is done, either by immersing it in water for
a couple of seconds or by connecting the
PLAN and
MODE/
PLAN contacts with
fingertips.
!
!
NO DECO
SURF
MAX
MAX
DIVE TIME
DIVE
BAT
NO
CEILING
ASC
A 0
A 2
A 1
¡C
¡F
A
m
S
C
S
P
E
E
D
HIS
LOG
ALT
SET
PLAN
Figure 3.2 Startup I
All segments shown
A
m
S
C
S
P
E
E
D
HIS
LOG
ALT
SET
PLAN
e
A
m
S
C
S
P
E
E
D
HIS
LOG
ALT
SET
PLAN
d
A
m
S
C
S
P
E
E
D
HIS
LOG
ALT
SET
PLAN
c
C
S
P
E
E
D
HIS
LOG
ALT
SET
PLAN
b
HIS
LOG
ALT
SET
PLAN
a
Figure 3.3 Startup II
Battery power indicator. When
two or less bar graph segments
are shown the
IQ-400
should
not be used for diving
