User manual
Poseidon MKVI User Manual
Chapter 3
Page 51
Units of measure
The Poseidon MKVI 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. Also, the Display can be congured to represent decimal points as
a period (“.”), or as a comma (“,”), depending on individual user preference.
Figure 3-4. Imperial units.
Figure 3-5. Metric units.
What follows is a more detailed description of each of the LCD screen elements, and what they
mean. It is important that all Poseidon MKVI 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. Alarm signal area.
As mentioned previously, the upper-right corner
of the screen is the alarm signal area, and under
normal circumstances it should be completely
blank. It was designed this way so that a quick
glance at the screen would be all that is neces-
sary to know whether any alarm conditions are
active. A blank eld in the upper-right corner of
the screen means all systems are functioning
properly, and all parameters are working cor-
rectly. In most cases, the signals will ash when
activated, further drawing attention.
Abort! and open circuit alerts
Figure 3-6. Abort! and open circuit alerts.
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 ABORT! in inverted font color. Whenever
this is displayed, the dive should be immediately 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, and a small
up-arrow above the diver’s mask), 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
In the upper-right corner of the Alarm Signal
Area is a circle with a diagonal slash through it.
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 MKVI electronics
are rst turned on, while the pre-dive routine is
being conducted.
Figure 3-8. DO NOT DIVE alert.
Figure 3-7b. Alarm signal area.