Introduction - Uwatec DC-12 Owner's Manual

Section Page
4. Dive Mode (cont'd) ......................................................... ..
e. No Decompression Time ........................................ 28
f. Decompression ....................................................... 28
g. DECO and ASC symbol ......................................... 29
h. Graphic Triangle ..................................................... 30
i.
Deco Stop Depth and Time .................................... 30
j. Command Arrows ................................................... 30
k. Ceiling ..................................................................... 32
I. Ascent Rate ............................................................ 33
m. Out of Range .......................................................... 34
n. Between Dives ........................................................ 36
o. Repetitive Dives .. .. .... .. .. .. . .... .. . .. .. .. .. .. ....... ....... ... . ... 37
VIII Special Conditions ............................................................. 38
1.
High Altitude Diving ...................................................... 38
2. Group Diving ................................................................ 39
3. Chamber Diving or Testing .......................................... 40
4. Error Mode ................................................................... 40
IX Care and Maintenance ...................................................... 41
1. Battery .......................................................................... 41
2. General ......................................................................... 41
X Design Specifications ........................................................ 43
XI Glossary ............................................................................. 44
XII Limited One Year Warranty ............................................... 46
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I. INTRODUCTION
Congratulations on purchasing the DC-12 Decompression Com-
puter. If used properly, the DC-12 will make your diving easier and safer.
To gain the maximum benefits from the DC-12, and to use it properly and
safely, you must read and thoroughly understand this Owner's Manual.
The DC-12 Decompression Computer is a significant advance-
ment in the development of diving computers. It has many remarkable
features.
The heart of the DC-12 is a decompression model developed by
Max H. Hahn, Ph.D., an internationally recognized authority in decom-
pression theory and active diving instructor. Dr. Hahn's latest math-
ematical model is based not only on statistics of decompression sick-
ness (des) symptoms but also on bubble measurements after wet
chamber exposures of human subjects.
The DC-12 Decompression Computer has several pioneering
features:
_.. A decompression model which:
• keeps bubble grades low after 'first' dives
• matches off-gassing speed to the expected bubble grades after
the preceding dive.
• allows two elevation ranges: From sea level to 2,300 ft (700 m) and
for high altitude diving from 2,300 ft (700 m) to 8,200ft (2,500 m).
• fights excessive des-risks of very deep dives as well as deeper-
than-previous repetitive dives by adding appropriate decom-
pression demands, if such profiles are not avoided.
_.. A unique, easy to read, intuitive display.
_.. A warning display on the DC-12 guides the diver to not exceed a
safe ascent rate or ascend above his decompression ceiling.
_.. The DC-12 battery has a 1 O year shelf life and has the capacity for
approximately 8 years of active diving ( at 70 dives per year).
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