xDEEP BLACK BT, Руководство пользователя

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39. SETTINGS – WATER SALINITY
Like all devices of this type, the BLACK BT measures the descent depth indirectly,
recalculating the measured pressure into meters of water column taking into
account water density resulting from the salinity. If the device calibrated at a
particular salinity value is used in water of different salinity, the displayed depth can
be distorted.
Using the function
Settings -> Practical -> Salinity , you can set the salinity value
which the device will take into account while performing calculations.
The device makes it possible to set one of three predefined values:

Saltwater – salinity 1030 g/dm
3

EN 13319 (default) – salinity 1020 g/dm
3
, in line with the European standard
EN13319;

Freshwater – salinity 1000 g/dm
3
.
The correct reading of the depth may have influence on the
performed diving plan. Before the dive make sure that you set the
correct value of salinity.
If you use devices of various manufacturers, take into account that
they can be calibrated with different salinity values. It will lead to
differences in the displayed depth in the same conditions. Check in
the manual which salinity value was taken into consideration at
calibrating them.