Poseidon SE7EN+ User Manual Appendix 3 Page 108
Units of measure
The Poseidon SE7EN+ is capable of displaying parameter values in either metric or imperial
units. Both screens at the top of the next page show the same information, except that the left
screen shows the depth and temperature values in imperial units, and the right screen shows
the values in metric units. Depth units are indicated by an “ft” or “m”; and temperature units
are indicated by a ºF or ºC.
Figure 3-4. Imperial units.
Figure 3-5. Metric units.
What follows is a more detailed description of each of the screen elements, and what they
mean. It is important that all Poseidon SE7EN+ divers become familiar with these symbols and
values, what they mean, and how to respond when they are not displaying appropriate values
(or are ashing).
Alarm signal area
Fig ur e 3 -7. Abort and open circuit alerts.
The alarm icons are displayed in the alarm signal
area in the upper-right corner of the screen.
Under normal circumstances it should be com-
pletely blank. It was designed this way so that a
quick glance at the screen would be all that is
necessary to know whether any alarm condi-
tions are active. A blank eld in the upper-right
corner of the screen means all systems are
functioning properly, and all parameters are
working correctly. In most cases the signals will
ash when activated to draw attention.
Abort and open circuit alerts
Figure 3-6. Alarm signal area.
The most important alert symbols on the screen
are also the largest: The ABORT and Open-
Circuit symbols. The ABORT symbol is a large
word
ABORTABORT in inverted font color. Whenever
this is displayed, the dive should be immedi-
ately terminated. There are two possible abort
scenarios, either OC or CC. If accompanied by
the Open-Circuit Alert icon (image of a diver’s
mask, second-stage regulator, a series of
bubbles on either side of the diver’s face, the
diver must immediately terminate the dive and
commence a safe ascent to the surface in open-
circuit mode. If the Abort icon is displayed alone
without the image of the divers mask the diver
must immediately terminate the dive and
commence a safe ascent to the surface on
closed circuit.
DO NOT DIVE alert
This symbol is the “DO NOT DIVE” Alert, and it
indicates that the system is not currently ready
to be used for diving. This symbol will always be
activated when the Poseidon SE7EN+ electron-
ics are rst turned on, while the pre-dive routine
is being conducted.
Figure 3-8. DO NOT DIVE alert.
Refer to page 115 how to manage OC ABORT.
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