Owner`s manual

LIMITED TWO-YEAR WARRANTY

For details, refer to the Product Warranty Registration Card provided.

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

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).

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.