2
!
WARNING
You must carefully read and understand this entire manual before using your SUBGEAR XP-H.
Diving has many inherent risks. Even if you follow the instructions of this manual in a careful
manner, it is still possible that you may be seriously injured or die from decompression sickness,
oxygen toxicity or some other inherent risk of scuba with Nitrox or compressed air. Unless you are
fully aware of these risks and are willing to personally accept and assume responsibility for those
risks, do not use SUBGEAR XP-H.
Guidelines for the use of XP-H
The following guidelines for using XP-H are derived from the latest medical research and the
recommendations of the American Academy of Underwater Sciences for diving with diving
computers. Following these guidelines will greatly increase your safety while diving, but cannot
guarantee that decompression sickness or oxygen toxicity will not occur.
• XP-H is designed for dives with compressed air (21% O
2
) and Nitrox (22 to 50% O
2
) only. Do not
use XP-H for dives made with other mixed gases.
• It is absolutely necessary to check the set mixture before each dive and to compare it to the
gas mixture currently used. Always remember: setting an incorrect mixture carries an inherent
risk of decompression sickness and/or oxygen toxicity! Maximum deviation from the measured
mixture must not exceed 1% O
2
. An incorrect gas mixture can be lethal!
• Only use XP-H with open circuit breathing systems.
• Only use XP-H for diving with an independent breathing apparatus. XP-H is not designed for
long term exposures with Nitrox.
• Always observe the visual and audible alarm signals. Avoid situations of increased risk which
are marked with a warning sign in this operating manual.
• XP-H has a ppO
2
warning. The default limit is set at 1.4bar ppO
2
max. It can be changed
between 1.2 and 1.6bar.
• Frequently check the "oxygen clock" (CNS O
2
). Ascend and finish the dive if the CNS O
2
exceeds 75%.
• Never dive deeper than the Maximum Operating Depth (MOD) pertinent to the gas mixture in use.
• Always check the diving limits considering the oxygen content and standard sports diving
procedures (decompression sickness, oxygen toxicity).
• In accordance with the recommended maximum diving limit of all instructional agencies, do not
dive deeper than 40 metres/130 feet.
• The danger of nitrogen narcosis has to be taken into consideration. XP-H gives no warning
about this.
• On all dives, with or without dive computer, make a safety stop for at least 3 minutes at 5 metres
(15 feet).
• All divers using dive computers to plan dives and indicate or determine decompression status
must use their own computer, which they take with them on all dives.
• If XP-H fails at any time during the dive, the dive must be terminated, and appropriate surfacing
procedures (including a slow ascent and a 3 to 5 minute safety stop at 5m /15ft) should be
initiated immediately.
• Comply with the ascent rate and carry out any decompression stop required. If the computer
should fail for any reason, you must ascend at a rate of 10m / 30ft per minute or less.
• On any given dive, both divers in a buddy pair must follow the most conservative dive computer
for that particular dive.
• Never dive without a buddy. XP-H does not substitute for a dive buddy.
• Only make dives that are appropriate to your level of dive training. XP-H does not increase your
knowledge of diving.
Safety considerations
I Safety considerations
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