Oceanic DataTrans Plus, Owner'S Manual

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9
D a t a T r a n s P l u s
you r r elat ive oxygen t oler an ce dosage (OTU), sh owin g t h e m axim u m of eit h er
per dive allowable oxygen , or 24 h ou r per iod allowable oxygen . As you r expo-
su r e (accu m u lat ion of oxygen ) in cr eases du r in g t h e dive, segm en t s will add t o
t h e gr aph ar ou n d t h e u pper r igh t per im et er of t h e scr een . As accu m u lat ion
decr eases, t h e bar gr aph will begin t o r ecede, in dicat in g t h at addit ion al expo-
su r e (accu m u lat ion ) is allowed for t h at dive, an d t h at 24 h ou r per iod.
Th e O2 Bar Gr aph also assist s you wit h m an agin g h igh par t ial pr essu r e of oxy-
gen (P O2) by flash in g t h e lar ge r ed Dan ger zon e segm en t (F ig. 7a) as a war n -
in g wh en t h e level of P O2 exceeds t h e m axim u m allowed lim it of 1.60 BAR
(ATA). Th is is explain ed in det ail in t h e H an dlin g t h e E xt r em es sect ion .
P r ior t o a r epet it ive n it r ox dive, if t h e segm en t s of t h e O2 Bar Gr aph ar e dis-
played du r in g t h e P r e Dive P lan n in g Sequ en ce™ (P DP S), an d n o segm en t s of
t h e Tissu e Loadin g Bar Gr aph ar e displayed (F ig. 8), t h at n ext dive is calcu -
lat ed t o be con t r olled by oxygen loadin g.
Va ria ble Asc e n t Ra t e In dic a t o r ™
Th e Var iable Ascen t Rat e In dicat or ™ (VARI), locat ed alon g t h e lower /r igh t
por t ion of t h e scr een (F ig. 9), is pr ovided t o h elp you t o avoid excessive ascen t
r at es by pr ovidin g a visu al r epr esen t at ion of ascen t speed, r at h er t h an ju st
sh owin g t h at you ar e ascen din g t oo fast .
F ig. 8 - Oxygen Con t r ol
F ig. 9 - Var iable Ascen t
Rat e In dicat or
®
DECO
C.Z. C.Z.
FT
O2
NO DECO
0 5 10 20 30 40 50 60
®
DECO
C.Z. C.Z.
O2
NO DECO
0 5 10 20 30 40 50 60