Locate the Battery cover on the end of the housing:
• Apply a coin to the recessed slot of the cover and turn it counter clockwise out of the housing (Fig. 170).
• Remove the Battery from the and discard according to local regulations governing disposal of Lithium batteries.
Battery Installation
• Lightly lubricate the new Battery cover O-ring with silicone grease and install it onto the cover. DO NOT roll it over the
threads, instead stretch it slightly to work it down over the slotted end of the cover into the groove at the base of the threads.
NOTE: The O-ring must be a genuine Oceanic part available at an Authorized Oceanic Dealer. Use of
any other O-ring will void the warranty.
• Place a new 3 volt, CR2, Lithium Battery positive ( + ) side into the Battery compartment with the negative ( - ) end facing out
(Fig. 171).
• Ensure that the Battery is properly oriented and the O-ring is evenly seated around the Battery cover (Fig. 172).
• Carefully place the Battery cover with spring into the housing and turn clockwise slowly by hand to ensure proper threading.
• Apply a coin and tighten until secure. The outer surface of the Battery cover should be flush with the outer surface of the
housing (Fig. 173).
To install the TMT (Transmitter) on a Regulator First Stage:
• Lightly lubricate the o-ring and threads of the TMT fitting with a halo carbon based lubricant such as Christo-Lube MCG111.
• Thread the TMT clockwise by hand into the Regulator's HP port (Fig. 174) and tighten until secure with a 5/8" open end
wrench.
• Attach the First Stage to a full Scuba Tank and pressurize by slowly opening the tank valve, listening for any indication of air
leaking around the fitting.
• If air leakage is present, DO NOT use, take the complete Regulator Assembly to an Authorized Oceanic Dealer for
inspection and service.
Fig. 170 - COVER
REMOVAL
Fig. 174 -INSTALLING TMT
Fig. 173 - BATTERY COVER
ALTITUDE SENSING AND ADJUSTMENT
Prior to the first dive of a series of repetitive dives, Altitude (i.e., ambient pressure) is measured upon activation of Dive Surface Mode and every 15 minutes
until a dive is made or operation reverts to Watch Mode.
> While it is operating in Watch modes after a dive, measurements are taken every 15 minutes during the 24 hour period after surfacing.
> Measurements are only taken when the unit is dry.
> Two readings are taken, the second reading 5 seconds after the first. The readings must be within 1 foot (30 cm) of each other to record that ambient
pressure as the current Altitude.
> No adjustments are made during any time that the Wet Contacts are bridged.
When diving in high altitude waters from 3,001 to 14,000 feet (916 to 4,270 meters), the OC1 automatically adjusts to these conditions providing cor-
rected Depth, and reduced No Deco and O2 Times at intervals of 1,000 feet (305 meters).
At an elevation of 3,001 feet (916 meters), Depth calibration automatically changes from feet of seawater to feet of fresh water. This is the first adjustment
to the algorithm.
When the Conservative Factor feature is set On, NDLs are calculated based upon the next higher 3,000 foot (915 meter) Altitude. All adjustments for
Altitudes greater than 11,000 feet (3,355 meters) are then made to allowable dive times for 14,000 feet (4,270 meters). At Sea Level, calculations are
based upon an Altitude of 6,000 feet.
The OC1 will not function as a Dive Computer above 14,000 feet (4,270 meters).
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