Poseidon SE7EN+ User Manual Appendix 3 Page 115
Battery status indicator
Figure 3-29. Battery capacity indicator.
At the upper right-hand corner of the screen the current state of charge for the M28 battery is displayed
together with an icon that visually reects the M28 battery’s state of charge. In case the M28 battery
has a low state of charge or there is a problem reading battery data from the M28 battery, the battery
symbol will ash, and the battery center view will be automatically selected. If using the M28 together
with a SE7EN, the battery symbol in the upper right-hand corner still only reects the M28 battery
status but will ash in case the SE7EN battery state of charge is low or if data cannot be read from the
SE7EN battery. Likewise, the battery center view will be automatically selected in case the SE7EN
battery has low state of charge or if data from it cannot be read.
Temperature
Figure 3-30. Temperature.
In the “center view” is the water and loop tempera-
ture reading. This value is displayed in units of
centigrade when in metric mode, and units of
fahrenheit when in imperial mode.
DANGER:
Do NOT ignore the remaining battery capacity indicator. If the
battery fails, the entire life-support system (including alarms) may
cease to function. Failure to abort to open-circuit and terminate
the dive could lead to serious injury or death.
Cylinder pressure indicators
Along the sides of the M28 screen are the two cylinder pressure indicators, represented as bar
graphs. The graph on the left side of the screen is for the diluent supply, and the graph on the
right side of the screen is for the oxygen supply. Two segments in the bars represents approxi-
mately 10% of the total gas supply for each cylinder. When the pressure in either cylinder drops
below 26 bar for Oxygen and 40 bar for diluent, the remaining segments of the corresponding
bar graph will ash together with the alert icon. The full-scale (100%) value of each of these bar
graphs is established through the cong menu of the M28 computer.
Figure 3-31.
Diluent cylinder pressure indicator.
Figure 3-32a.
Oxygen cylinder pressure indicator.
Invalid cylinder pressure:
The high pressure sensor signals are continously monitored to detect if the signal falls out of
the valid range or if the signal increases unexpectedly. A signal below the valid range may be
caused by a cable failure and a signal that increases unexpectedly may be caused by moisture
and / or corrosion inside the cable connector.
An invalid sensor signal means that the measured cylinder pressure is invalid and that the
measured cylinder pressure is regarded as unknown and should not be trusted.
If an invalid cylinder pressure is detected this is indicated on screen with the middle segments
lit for the affected cylinder bar graph. An invalid cylinder pressure further affects the calculated
Remaining Dive Time and other alarms may be triggered since the remaining gas supply is
unknown.
The recommended action when a cylinder pressure is invalid is to abort the dive.
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