Using the NiTek Plus
34
NiTek Plus Dive Computer User Manual
Note:
If the PO2 alarms activate at a depth of 20 feet (6 meters)
or less, you most likely have not exceeded the limiting PO2. It is
more likely that you forgot to set the FO2 percentages prior to
the dive. As a result, the computer has entered the FO2 default.
See “Understanding FO2 default” for more information.
Oxygen limit index (OLI) warning
The NiTek Plus’s oxygen limit index (OLI) reflects the
cumulative effect of your exposure to elevated partial pressures
of oxygen. The PO2 warning only accounts for the intensity of
the exposure, but the OLI accounts for both the intensity and
length.
When seven of the O2’s eight bars are displayed, the computer’s
audible alarm sounds for three seconds, and “OLI” flashes for
ten seconds. If you do not ascend to a shallower depth, and all
eight of the O2’s bars are displayed, the alarm sounds twice
again and “OLI” flashes again. “OLI” continues to flash until the
O2 bar graph drops to seven bars. This warning will appear in
log mode after the dive.
Should the OLI and PO2 warnings activate at roughly the same
time—and at relatively shallows depths, early in the dive—you
most likely have not exceeded your actual oxygen limits. What
has happened is that you forgot to set the FO2 percentages prior
to the dive and the computer has FO2 defaulted. See
“Understanding FO2 default” for more information.
Decompression warning
If you exceed the no-decompression limits, the computer enters
decompression mode. An audible alarm sounds for three seconds
indicating that you have decompression stop requirements.
Caution:
Decompression diving is considered to substantially
increase your risk of decompression illness more than dives
made within no-decompression limits.
