Dive Rite Nitek Duo User's Guide download pdf (Page 25)

Using the NiTek Duo

NiTek Duo Dive Computer User Manual 21

Default warning indicated by Nitrox flashing and a dashed line for

mix1

When and how FO2 default occurs

One factor in determining if and when your NiTek Duo’s FO2

setting is in default, is whether you set one or both mixes for air

or Nitrox.

• If you set either mix for air (an FO2 of 21 percent), the

computer assumes that subsequent dives will be made using

air. This means that the mix set for air remains set for air,

dive after dive, without defaulting.

• If you set either mix for Nitrox or oxygen (FO2s of 22 to 99

percent), the computer assumes that subsequent dives will be

made on Nitrox. Thus, to protect you from accidentally

diving a Nitrox mixture that cannot accurately be monitored,

the computer’s FO2 setting defaults at midnight (it does not

default at midnight if you are under water).

Dealing with FO2 default

The best way to deal with FO2 default is to simply avoid it.

Make sure that prior to every dive you check the FO2 settings for

mix1 and mix2. Make sure they accurately match what you are

going to breath during the dive.

When the computer is in FO2 default mode, the Nitrox symbol

flashes. This indicates that you need to set the percentages for

mix1 and mix2 to the correct FO2.

If you go diving when the computer is in FO2 default mode, the

OLI and PO2 symbols, current depth, and PO2 value flash. The

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Dive Rite Nitek Duo User's Guide Page 25