Suunto D4 manual

Models: D4

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At this time, perform your pre-checks, making sure that:

the instrument operates in the correct mode and provides a complete display (AIR/NITROX/FREE mode)

the battery level is ok

the altitude, personal adjustment, Safety/Deep stops, and RGBM settings are correct

the instrument displays correct units of measurement (Metric/Imperial)

the instrument displays the correct temperature and depth (0.0 m/0 ft)

the alarm beeps

And, if set to NITROX mode, make sure that:

the correct oxygen percentage is adjusted according to the measured oxygen percentage in your cylinder

the oxygen partial pressure limit is set correctly

For more information on the NITROX mode, refer to Section 6.2. Diving in NITROX mode (DIVEnitrox).

The dive computer is now ready for diving.

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Suunto D4 manual