Apeks NS158000, Owner'S Manual, Page: 3 / 96

Doc. 12-7969 Doc. 12-7969 r09 (9/22/22)
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© Apeks (2022)
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WARNINGS:
• This manual is to be used in conjunction with the Apeks Dive Computer Safety and Reference Manual, Doc. 12-
7967. It contains general safety warnings and recommendations for use of this product.
• The DSX is intended for use by recreational divers who have successfully completed an internationally
recognized course in scuba diving (for air use), diving with enriched nitrogen-oxygen (nitrox) breathing gas
mixtures (for nitrox use), trimix (for trimix use).
• It must not be used by untrained persons who may not have knowledge of the potential risks and hazards of
scuba diving and diving with enriched nitrogen-oxygen (nitrox) mixtures.
• You must obtain scuba certification in diving with enriched nitrogen-oxygen mixtures (nitrox) before using the
DSX for nitrox diving.
• Your new DSX and O2 Analyzer cable are paired and precisely tuned at the factory, to compensate for resistance
in the cable. ONLY use the cable that ships with your DSX. The cable serial number (labeled on the cable) must
match the serial number that displays on your DSX (O2 Analyzer Sub Menu) screen. Contact your Apeks Dealer
for assistance if the Oxygen Analyzer cable ever needs to be replaced.
• You must obtain trimix certification in diving with helium-oxygen-nitrogen mixtures (trimix) before using the DSX
for trimix diving.
• You must obtain CCR certification in diving with rebreathers before using the DSX for CCR diving.
• Before using this product for military or commercial applications, contact Apeks for recommendations,
limitations, and warnings for such use. www.apeksdiving.com.
• As with all underwater life support equipment, improper use or misuse of this product can cause serious injury
or death.
• Never participate in sharing or swapping of a dive computer.
• Conduct your dives in such a manner so as to insure that you continuously check the computer's proper
function.
• Read and understand this owner’s manual completely before diving with the DSX.
• If you do not fully understand how to use this dive computer or if you have any questions, you should seek
instruction in its use from your authorized Apeks dealer before you utilize this product.
• If your DSX stops working for any reason while operating, it is important that you have anticipated this
possibility and are prepared for it. This is an important reason for not pushing the tables, oxygen exposure
limits, or entering decompression without proper training. If you dive in situations where your trip would be
ruined or your safety would be jeopardized by losing the use of your DSX, a backup instrument system is highly
recommended.
• Each numeric and graphic display represents a unique piece of information. It is imperative that you understand
the formats, ranges, and values of the information represented to avoid any possible misunderstanding that
could result in error.
• Remember that technology is no substitute for common sense. The dive computer only provides the person
using it with data, not the knowledge to use it. Remember also that the dive computer does not actually measure
and test the composition of your body tissue and blood. Using an Apeks dive computer, just as using any
other Decompression Tables, is no guarantee of avoiding decompression sickness. 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.
• Diving at high altitude requires special knowledge of the variations imposed upon divers, their activities, and
their equipment by the decrease in atmospheric pressures. Apeks recommends completion of a specialized
altitude training course by a recognized training agency prior to diving in high altitude lakes or rivers.
• Repetitive dives in a series should only be conducted at the same altitude as that of the first dive of that series.
Repetitive dives made at a different altitude will result in an error equal to the difference in barometric pressure,
and possibly a false dive mode with erroneous data.
• If the DSX is activated at an elevation higher than 4,270 m (14,000 ft), it will immediately shutdown.
• Decompression diving or diving deeper than 39 m (130 ft) will greatly increase your risk of decompression
sickness. This should only be attempted by those properly trained and certified in decompression diving. It is
important to completely understand the features, functions, and specifically the limitations of the DSX. Based on
this the diver must decide if the DSX is suitable for the dive activities and dive profiles being planned.
• Using an DSX is no guarantee of avoiding decompression sickness.
• The DSX enters Violation Mode (see "Complications" p. 54) when a situation exceeds its capacity to predict an
ascent procedure. These dives represent gross excursions into decompression that are beyond the boundaries
and spirit of the DSX's design. If you are following these dive profiles, Apeks advises that you should not use a
DSX.
• If you exceed certain limits (see "Complications" p. 54), the DSX will not be able to help you get safely back to
the surface. These situations exceed tested limits and can result in loss of some functions for 24 hours after the
dive in which a violation occurred.