|
|
Valve Type |
DEMAND |
Adjustment |
|
Balancing System |
|
Integrated Purge Button |
YES |
Mouthpiece |
ORTHODONTIC |
Nitrox Compatibility |
STANDARD TO 40% |
Ambidextrous |
|
Integrated Swivel |
|
Weight (without hose) |
6 OUNCES |
Dimensions (front profile) |
2.9 INCHES |
First Stage Configurations |
PX-2/SP-4 |
Minimum Cracking Effort |
1.1 CIW* |
Factory Set Inhalation Effort |
1.2 - 1.4 CIW* |
Work of Breathing |
1.23 JOULES (PX-3)
1.47 JOULES (SP-5) |
Warranty |
2 YEAR |
Limited Lifetime Service Agreement |
YES |
30-Day Satisfaction Guarantee |
YES |
WORK OF BREATHING
Did you know that it costs energy to breathe? The
amount of energy your regulator requires to move each liter of air is
called work of breathing (WOB). Lower work of breathing equals lower
effort required to breathe and increased comfort and safety during a
dive.
How to Read Work of Breathing Charts
The computer-generated breathing machine chart presented above
represents a regulator's performance per standards established by the
U.S. Navy's Experimental Diving Unit. Tests are conducted at 198 feet
with approximately 3000-psi supply pressure, 25 breaths per minute of
2.5 liters each.
(1) Inhalation - The chart shows
one complete breath cycle, starting with inhalation on the left and
continuing along the bottom to the right, staying mostly below 0.0;
thus the inhalation work of breathing is reported in negative numbers.
(2) Exhalation - The exhalation
effort begins on the right and runs across the top to the left. These
are all positive numbers since a diver (or the machine in this case) is
blowing out (exhaling) rather than inhaling.
(3) WOB - The total area inside
the loop formed by the two lines is what the computer analyzes to
calculate the regulator's total work of breathing - the amount of
energy the regulator requires to move each liter of air.
*Column Inches of Water
Compare Regulators and have a look at the Alpha 8 Octo Owners Manual
NOTE: The document
listed below is for reference only. For specific operational details,
consult the original paper documents included with your Regulator.
Regulator Comparison Chart .pdf

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