SUUNTO DX - Manual (Page 65)

NOTE
As a safety precaution, the oxygen calculations in the dive com-
puter are made with an oxygen percentage of 1% + set O
2
%.
When the dive computer is set in MIXED mode, the Dive Planning mode calculates
using the O
2
% and PO
2
values that are currently in the computer.
To set the nitrox, trimix and/or heliox mixes, refer to Section 5.8.2. Setting the open-
circuit gases.
5.9.1. Default gas mix settings
In the MIXED and CCR mode, the Suunto DX allows you to set 1–8 open-circuit gas
mixes containing 5–99% oxygen and 0–95% helium. In CCR mode the DX additionally
allows up to three diluent gases.
In the MIXED and CCR mode, the default setting is standard air (21% O
2
and 0% He).
It remains in this setting until the O
2
% is adjusted to any other percentage of oxygen
(5%–99%) or the He% is adjusted to any other percentage of helium (1–95%). In
MIXED mode, the default setting for maximum oxygen partial pressure is 1.4 bar,
however you are able to set it in the range of 0.5–1.6 bar. In CCR mode, you'll use
the Set Point menu in CCR Dive Settings to define your high and low set points and
switch depths.
5.10. Activation and pre-checks
This section describes what happens when you activate the DIVE mode and explains
the pre-checks that it is highly recommended you perform before you get into the
water.
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