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LIMITED TWO-YEAR WARRANTY
For details, refer to the Product Warranty Registration Card 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.
ZEN Owner's Manual, Doc. No. 12-2931
© 2002 Design, 2009
San Leandro, CA USA 94577
TRADEMARK NOTICE
TUSA, the TUSA logo, ZEN, and the ZEN logo, are all registered and unregistered trademarks of Tabata USA and
Tabata Corp. Ltd. All rights are reserved.
PATENT NOTICE
U.S. Patents have been issued, or applied for, to protect the following design features:
Data Sensing and Processing Device (U.S. Patent no. 4,882,678), 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 ZEN is designed to comply with
this standard.
DECOMPRESSION MODEL
The program within the ZEN 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 ZEN dive computer model is
based upon the latest research and experiments in decompression theory. Still, using the ZEN, 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.
