Dive Rite NiTek He Owner's Manual download pdf (Page 33)

NiTek

/NiTek

Owner’s Manual Page 33

actually go diving. In instances such as these, the NiTek will hold its FO

setting

until midnight, then default. This helps protect you in the event you dive the next

day with a cylinder whose oxygen content does not match that of the cylinder you

intended to use the day before.

Later-model NiTek

s differ from earilier models in the following ways:

➤ While later-model NiTek

s will default at midnight, they do not default

ten minutes after surfacing from a dive. This means that, on subsequent

dives during the same day, it is especially important you double-check

your FO

settings, making certain they correspond to the gas mixtures

you will be using. Otherwise, your NiTek

will assume you are using the

same gas mixtures as on the previous dive.

➤ Unless you tell the computer otherwise, the computer will automatically

start each dive on mix 1, rather than on the last mix used during the

previous dive.

How can you tell whether yours is a later-model NiTek

? Easy: Make a

dive; wait ten minutes after surfacing; then, check your FO

settings. If

they have not defaulted, yours is a later-model NiTek

Dealing With FO2 Default: As outlined previously, the best way to deal with FO

default is to simply avoid it. Doing so is easy—simply access Dive Plan Mode prior

to every dive and make sure the FO

setting displayed accurately matches that of

your breathing media.

Okay, what happens if you forget to do so? As you should already know, if

the NiTek’s FO

setting is in default, the computer’s audible alarm will sound as you

enter the water and/or begin your descent. If you hear the alarm, halt any descent,

surface immediately and reset the NiTek to the correct FO

. Little harm done.

All right, what if you miss or ignore the FO

Default Alarm and dive anyway?

As discussed previously, the PO

Warning should sound/appear at a depth of approxi-

mately 20 ft/6m. This should be soon enough for you to surface and correct the

problem without affecting the computer’s Oxygen Limit Index (OLI) too adversely.

How about a “worst case” scenario? That is, you are well into a dive when

you notice the OLI and PO2 limit symbol ﬂ ashing furiously. (And, did we forget

to mention that you are in an overhead environment, such as a cavern or wreck,

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Dive Rite NiTek He Owner's Manual Page 33

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