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Scubapro MERIDIAN Manual

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3. Meridian as a dive computer
3. Meridian as a dive computer
35
English
SCUBAPRO MERIDIAN
WARNING
Flying while Meridian displays the NO FLY
symbol can result in serious injury or death.
3.7.2 Altitude and the
decompression algorithm
Atmospheric  pressure  is  a  function  of 
altitude  and  of  weather  conditions.  This 
is  an  important  aspect  to  consider  for 
diving, because  the  atmospheric  pressure 
surrounding  you  has  an  influence  on 
ongassing  and  offgassing  of  nitrogen. 
Above a certain altitude, the decompression 
algorithm has to change in order to account 
for the effect of the change in atmospheric 
pressure.
Meridian  divides  the  possible  altitude 
range in 5 classes that are illustrated in the 
illustration below:
Elevation
Altitude
Class
Barometric
switch point
Dive
Computer
mode
4000 m
13120 ft
C4 610 mbar
8.85 psi
GAUGE
(no deco
data)
3000 m
9840 ft
C3 725 mbar
10.51 psi
SCUBA
2000 m
6560 ft
C2 815 mbar
11.82 psi
SCUBA
1000 m
3280 ft
C1 905 mbar
13.13 psi
SCUBA
0 m
0 ft
C0 SCUBA
The Altitude Classes are defined in terms of approximate elevations because the effect of 
weather conditions can make the pressure switch point occur at different levels. 
WARNING
At Altitude Class 4, Meridian functions in
GAUGE mode only (automatic switch from dive
computer mode).
F
NOTE: You can check your current
Altitude Class and elevation by
activating the altitude meter. Refer to
chapter Checking the Altitude on
how to do so.
F
NOTE: Meridian monitors the
altitude automatically: it monitors
the atmospheric pressure every
60 seconds and if a sufficient drop in
pressure is detected, the following will
occur it does the following:
• A new Altitude Class will be indicated
and if applicable, the prohibited
Altitude Class too;
• The desaturation time will be indicated,
which in this case is an adaptation to
the new ambient pressure. If a dive is
started during this adaptation time,
Meridian considers it a repetitive dive,
since the body has residual nitrogen.
3.7.3 Prohibited altitude
Increasing  altitude,  as  well  as  flying  after 
diving,  exposes  your  body  to  a  reduced 
ambient  pressure.  In  a  way  similar  to  the 
no-fly  time,  Meridian  advises  you  as  to 
which Altitude Classes are safe after a dive 
and which are not. For example, if you must 
drive over a mountain pass to return home 
after  a  dive,  it  can  be  quite  important  to 
have this information.
… 35 …


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  • Hi. What is error message E37 on the Meridian. Just did a dive and computer would not go into dive mode. When I came out it said E 37 Submitted on 27-4-2024 at 12:45

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Scubapro MERIDIAN User Manual - German - 58 pages

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