Tusa Element User manual
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LIMITED WARRANTY
For details, refer to the Product Warranty Registration information provided.
COPYRIGHT NOTICE
This manual is copyrighted, all rights are reserved. It may not, in whole or in part, be copied, photocopied, repro-
duced, translated, or reduced to any electronic medium or machine readable form without prior consent in writing from
Tabata USA, Inc. and Tabata Corp. Ltd. / 2002 Design.
Element User's Manual, Doc. No. 12-2917
© 2002 Design, 2008
San Leandro, CA USA 94577
TRADEMARK NOTICE
TUSA, the TUSA logo, Element, and the Element logo are all registered and unregistered trademarks of Tabata USA,
Inc. and Tabata Corp. Ltd. All rights are reserved.
PATENT NOTICE
U.S. Patents have been issued to protect the following design features:
Dive Time Remaining (U.S. Patent no. 4,586,136), Data Sensing and Processing Device (U.S. Patent no. 4,882,678),
and Variable Ascent Rate Indicator (U.S. Patent no. 5,156,055).
CE
The CE mark is used to mark conformity with the European Union EMC directive 89/336/EEC. TUSA dive instruments
fulfill the required EU directives.
EN 13319 "Diving accessories - Depth gauges and combined depth and time measuring devices - Functional and
safety requirements, test methods" is a European diving depth gauge standard. The Element is designed to comply
with this standard.
DECOMPRESSION MODEL
The program within the Element simulates the absorption of nitrogen into the body by using a mathematical model. This
model is merely a way to apply a limited set of data to a large range of experiences. The Element dive computer model
is based upon the latest research and experiments in decompression theory. Still, using the Element, just as
using the Navy (or other) No Decompression Tables, is no guarantee of avoiding decompression
sickness, i.e. “the bends.” Every diver’s physiology is different, and can even vary from day to day. No machine
can predict how your body will react to a particular dive profile.
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CONTENTS
NOTICES ..................................................................................................................................................................... 2
FULL LCD .................................................................................................................................................................... 6
FEATURES AND DISPLAYS............................................................................................. 7
INTRODUCTION .......................................................................................................................................................... 8
CONTROL BUTTON ................................................................................................................................................... 8
BAR GRAPHS ............................................................................................................................................................. 9
Nitrogen Loading Bar Graph (NiBG) ...................................................................................................................... 9
Oxygen Bar Graph (O2BG) .................................................................................................................................. 10
Ascent Rate Indicator (ASC) ................................................................................................................................ 10
ALPHA / NUMERIC DISPLAYS................................................................................................................................. 11
Depth Displays...................................................................................................................................................... 11
Time Displays ....................................................................................................................................................... 12
Temperature Display............................................................................................................................................. 12
POWER SUPPLY ...................................................................................................................................................... 13
Battery Indicator ................................................................................................................................................... 13
Low Battery Condition .......................................................................................................................................... 13
FO2 MODE ................................................................................................................................................................ 15
FO2 50% Default .................................................................................................................................................. 16
ACTIVATIONAND SETUP .............................................................................................. 17
ACTIVATION .............................................................................................................................................................. 18
Wet Contact Activation ......................................................................................................................................... 19
SURFACE SEQUENCE ............................................................................................................................................. 19
SURFACE MODE ...................................................................................................................................................... 19
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CONTENTS (continued)
SET MODE ................................................................................................................................................................ 20
TO SET FO2 ......................................................................................................................................................... 20
TO SET WET ACTIVATION ................................................................................................................................. 21
TO SET UNITS OF MEASURE ............................................................................................................................ 22
TO SET HOUR FORMAT ..................................................................................................................................... 23
TO SET TIME ....................................................................................................................................................... 24
TO SET PO2 ALARM ........................................................................................................................................... 25
TO SET FO2 50% DEFAULT ............................................................................................................................... 26
SUMMARY OF PRE DIVE SETUP ............................................................................................................................ 27
PLANAND DIVE MODES ............................................................................................... 29
PRE DIVE PLANNER ................................................................................................................................................ 30
NIBG (NITROGEN LOADING BAR GRAPH) ........................................................................................................... 32
O2BG (OXYGEN ACCUMULATION BAR GRAPH) ................................................................................................. 32
ASC (ASCENT RATE INDICATOR) .......................................................................................................................... 32
CONTROL OF DISPLAYS ......................................................................................................................................... 33
NO DECOMPRESSION DIVE MODE ....................................................................................................................... 33
No Deco Dive Deep Stop ..................................................................................................................................... 34
No Deco Dive Safety Stop .................................................................................................................................... 36
DECOMPRESSION DIVE MODE .............................................................................................................................. 37
CONDITIONAL VIOLATION MODE .......................................................................................................................... 38
DELAYED VIOLATION MODE # 1 ............................................................................................................................ 39
DELAYED VIOLATION MODE # 2 ............................................................................................................................ 39
DELAYED VIOLATION MODE # 3 ............................................................................................................................ 40
VIOLATION GAUGE MODE ...................................................................................................................................... 40
HIGH PO2 .................................................................................................................................................................. 42
HIGH OXYGEN ACCUMULATION ............................................................................................................................ 42
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CONTENTS (continued)
POST DIVE MODES ....................................................................................................... 45
POST DIVE SURFACE MODE .................................................................................................................................. 46
TRANSITION PERIOD .............................................................................................................................................. 46
AFTER THE TRANSITION PERIOD (THE FIRST 2 HOURS) .................................................................................. 47
Time to Fly/Desaturate ......................................................................................................................................... 47
Pre Dive Planner .................................................................................................................................................. 48
Log Mode .............................................................................................................................................................. 48
AFTER THE FIRST 2 HOURS .................................................................................................................................. 50
WET CONTACTS ....................................................................................................................................................... 51
RESET (CLEAR) FEATURE ...................................................................................................................................... 51
GENERAL ....................................................................................................................... 53
CARE AND CLEANING ............................................................................................................................................. 54
INSPECTIONS AND SERVICE ................................................................................................................................. 54
MODULE REMOVAL FROM BOOT .......................................................................................................................... 55
BATTERY REPLACEMENT ...................................................................................................................................... 55
RETURNING THE MODULE TO BOOT ................................................................................................................... 59
ALTITUDE COMPENSATION.................................................................................................................................... 60
SPECIFICATIONS ..................................................................................................................................................... 61
TUSA INTERNATIONAL ............................................................................................................................................ 66
SERVICE RECORD ................................................................................................................................................... 67
Pay special attention to items marked
with this Warning symbol.
6
LCD DISPLAY
Components:
a. Icon - DS (Deep Stop)
Icon - Descend Arrow
Icon - Stop Bar
Icon - Ascend Arrow
b. O2 Bar Graph
c. Icons - Operating Modes
d. Icons - Times
e. Icons - Am/Pm
f. Icons - Depths
g. ASC - Ascent Rate Indicator
h. Icon - Dive No.
i. Icon - Low Battery
i. O2 Bar Graph
j. Icons - Max Depth
k. Nitrogen Bar Graph
l. Icon - Log Mode
m. Icon - Temperature
c
d
e
f
gh
j
i
a
k
l
mb
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FEATURES and DISPLAYS
NOTE: The Element will enter Dive Mode upon descent to 5 FT (1.5 M) if
first activated by push button or if Wet Activation was previously set ON.
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R
E
S
P
O
N
S
I
B
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D
I
V
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Be a - RESPONSIBLE DIVER at all times.
INTRODUCTION
Welcome to TUSA and thank you for choosing the Element !
It is extremely important that you read this manual in sequence
and understand it completely before attempting to use the
Element.
Remember that technology is no substitute for common sense,
and a dive computer only provides the person using it with
data, not the knowledge to use it.
9
CONTROL BUTTON
The Control Button allows you to select display options and access specific information
when you want to see it. It is also used to enter settings.
BARGRAPHS
Nitrogen Loading Bar Graph (NiBG)
The NiBG (Fig. 1a) represents tissue loading of nitrogen, showing your relative no decom-
pression or decompression status. As your depth and elapsed dive time increase, seg-
ments will add to the NiBG, and as you ascend to shallower depths, the segments will
recede, indicating that additional no decompression time is allowed for multilevel diving.
The Nitrogen Loading Bar Graph monitors 12 different nitrogen compartments simulta-
neously and displays the one that is in control of your dive. It is divided into a No Decom-
pression (normal) zone, a Caution zone (also No Decompression), and a Decompression
(danger) zone.
While you cannot provide a guarantee against the occurrence
of decompression sickness, you may choose your own personal
zone of caution based upon age, physique, excessive weight,
etc., to reduce the statistical risk.
NOTE: Displays associated with oxygen and the O2
Bar Graph will only appear if FO2 has been set at a
value other than 'Air' (e.g., a numerical value).
Fig. 1 - NiBG
a
10
Oxygen Accumulation Bar Graph (O2BG)
The O2BG (Fig. 2a) represents oxygen accumulation, showing
the maximum of either per dive accumulated oxygen, or 24 hour
period accumulated oxygen.
As your oxygen exposure (accumulation) increases during the
dive, segments will add to the O2BG, and as loading de-
creases, it will begin to recede, indicating that additional
exposure is allowed for that dive and 24 hour period.
Ascent Rate Indicator (ASC)
The ASC (Fig. 2b) provides a visual representation of ascent
speed (i.e., an ascent speedometer).
The segments of the ASC represent two sets of speeds which
change at a reference Depth of 60 FT (18 M). Refer to the chart
for segment values.
WARNING: At depths greater than 60 FT (18 M),
ascent rates should not exceed 60 feet per minute
(18 meters per minute). At depths of 60 FT (18 M)
and shallower, ascent rates should not exceed 30
feet per minute (9 meters per minute).
Fig. 2 - O2BG and ASC
ASC values
Deeper than 60 FT (18 M)
Segments Ascent Rate =
Displayed FPM MPM
0 0 - 20 0 - 6
1 21-50 6.5-15
2 51-60 15.5-18
3 >60 >18
60 FT (18 M) & Shallower
Segments Ascent Rate =
Displayed FPM MPM
0 0 - 10 0 - 3
1 11-25 3.5-7.5
2 26-30 8-9
3 >30 >9
a
b
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