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WARNING: Never switch to another gas before you start breathing it!
Gas correction
If you have all mixes prepared and you have already switched the FREEDOM to Open circuit mode
and for some reason you decide to exchange one of utilized bottles for another gas or change it with
your partner during the dive, it is necessary to correct the existing proportions. Go to the Open
circuit menu and select MIXTURE SETUP. There you can change the proportions of your gases.
Measrued CCR mode
Use of the measured CCR mode is intended for diving with a closed-circuit apparatus, when the
partial pressure of oxygen in the breathing gas is measured directly by sensors connected with a
cable to the Freedom computer. In such a case, this does not depend on the principle of the utilized
rebreather (all types of SCR, eCCR and mCCR can be used).
Activating CCR mode
To start a dive, select the item “Main menu/Dive/Measured CCR”. Measured CCR can be set as the
default mode in preferences; in such a case, your computer will be started in this mode even in the
case of automatic start of the Dive mode due to an increase in ambient pressure. In addition, this
simplifies the selection of the dive mode prior to diving, as the default mode is always offered first in
the “Dive” menu.
After pressing KEY1, a recapitulation of the important settings will be displayed: listing of bailout
gases, water salinity (which has an impact on the precise measurement of depth), gradient factors,
decompression procedure (stops/ceiling), depth of the last stop, activation/deactivation of safety
stops, length of deep stops, current altitude above sea level (measured by a pressure sensor; this
value is influenced by weather), status of alarms, CCR mode, number of sensors, diluent composition,
SP low and SP high.
The dive mode is started after the important settings have been checked. Depth, dive time, window
for decompression stops, actual time, ascent time, currently used mixture, no deco limit/time at
stop, window for deep stop, 1-3 fields with the ppO2 value (depending on the setting of the number
of sensors), battery status and decompression status are displayed on the detailed screen.
The No deco limit window is shared with the time at the decompression stop. At the moment of
expiry of the no-decompression time, the time spent at the first decompression stop is displayed.
Deep stop is indicated by the depth of the deep stop. At the moment of reaching the deep stop level,
the depth value changes to time data corresponding to the moment of termination of the deep stop.
The values of partial pressures are displayed in white. If a values are below the hypoxic limit, the
values are displayed in blue. If the values exceed the hyperoxic limit, the values are displayed in red.
Dive time, ascent time, depth (highlighted), maximum depth, CNS %, temperature, average ppO2
(average of the values of the valid oxygen sensors), battery status and decompression status are
displayed on the Synopsis screen (switch to this screen using KEY1).
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