Technical information

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3. Meridian as a dive computer
SCUBAPRO MERIDIAN
3. Meridian as a dive computer
accordingly, basically reflecting the fact that
you will finish the dive using Gas 1 only.
F
NOTE: if after Meridian has changed
the decompression schedule to reflect
the missed gas switch, you descend
again below the MOD for Gas d,
Meridian reintroduces Gas d into the
calculations and the decompression
schedule changes accordingly.
Delayed gas switch
You can catch up on a planned gas mixture
switch at any time by selecting the gas
manually. Press and hold SEL/ESC button
to start the gas switch procedure. Meridian
will show the text Gas d and its MOD
flashing on the display. This helps you verify
that you are performing a switch to a safe
gas. At this point press SEL/ESC button
to confirm the switch. Meridian will display
the text Gas d without flashing and adapt
the decompression schedule accordingly.
Submerging below the MOD after a
gas switch
If after having switched to Gas d you
inadvertently drop again below the MOD for
that mixture, the MOD alarm will immediately
go off. Either switch back to Gas 1, or
ascend above the MOD for Gas d.
3.11 Warnings and alarms
Meridian can alert you of potentially
dangerous situations via warnings and
alarms. You can only modify the warning
and alarm settings via PC interface.
Warnings represent situations that require
the diver’s attention, but ignoring them
does not represent an immediate risk. It is
up to you to decide which ones you would
like to be active and which ones not. The
available warnings are:
3.11.1 CNS O
2
= 75%
Meridian tracks your oxygen uptake via the
CNS O
2
clock. If the calculated value of
CNS O
2
reaches 75%, Meridian will emit a
sequence of audible beeps for 12 seconds
and the value of the CNS O
2
will be flashing
in the lower right corner. The flashing will
continue until the value of CNS O
2
drops
under 75%.
CNS O
2
= 75%
3.11.2 No-Stop time = 2 minutes
If you wish to avoid unintentionally
performing a decompression dive, Meridian
can activate a warning when the no-stop
time reaches 2 minutes. This applies to
both L0 no-stop and MB no-stop time (see
chapter 3.11.15 Diving with MB levels
for more information on MB level diving). It
gives you the opportunity to start ascending
before incurring a decompression stop or a
level stop obligation.
No-Stop time = 2 minutes
Meridian emits a sequence of audible
beeps for 12 seconds and the no-stop time
will flash. The flashing will continue until you
ascend sufficiently for the no-stop time to
grow to 3 minutes, or until Meridian enters
into decompression.