27
DIVING IN NITROX MODE
3.4.
Before Diving
3.4.1.
The ZOOP can be set for diving with standard air only (Air mode) or it can be set
for diving with Enriched Air Nitrox (Nitrox mode). If you are educated for nitrox
diving and you plan to make nitrox dives, it is recommended that you set the dive
computer permanently to its NITROX Mode. The Nitrox mode can be enabled by
accessing MODE-SET-MODEL (see chapter 4.2. “Set Modes”).
If set to Nitrox mode, the correct oxygen percentage of the gas in your cylinder
must always be entered into the computer to ensure correct nitrogen and oxygen
calculations. The dive computer adjusts its mathematical nitrogen and oxygen
calculation models according to the entered O
2
% and PO
2
values. Calculations
based on Nitrox use result in longer no-decompression times and shallower
maximum depths than diving with air. When the dive computer is set in Nitrox
mode the Dive Planning modes calculates with the O
2
% and PO
2
values that are
currently in the computer.
WARNING!
DO NOT DIVE WITH A CYLINDER OF ENRICHED AIR IF YOU HAVE
NOT PERSONALLY VERIFIED ITS CONTENTS AND ENTERED THE
ANALYSIS VALUE INTO YOUR DIVE COMPUTER!
Failure to verify cylinder contents and enter the appropriate O
2
% into your dive
computer will result in incorrect dive planning information.
Fig. 3.19. Ceiling and Floor
Zones. The Recommended
and Manadatory Safety Stop
zone lies between 6 m and
3 m [20 ft and 10 ft].
WARNING!
The dive computer will not accept fractional percentage values of oxygen
concentration. Do not round up fractional percentages. For example, 31.8%
oxygen should be entered as 31%. Rounding up will cause nitrogen percent-
ages to be understated and will affect decompression calculations. If there
is a desire to adjust the computer to provide more conservative calculations,
use the personal adjustment feature to affect decompression calculations or
reduce the PO
2
setting to affect oxygen exposure according to the entered
O
2
% and PO
2
values.
FLOOR
3 m / 10 ft
6 m / 18 ft
CEILING