Operating Instructions
Page 19
RevA
9. Storage and Maintenance
The Perdix AI dive computer and transmitter should be stored
dry and clean�
Do not allow salt deposits to build up on your dive computer�
Rinse your computer with fresh water to remove salt and other
contaminants� Do not use detergents or other cleaning
chemicals as they may damage the dive computer� Allow to
dry naturally before storing�
Store the dive computer and transmitter out of direct sunlight
in a cool, dry and dust free environment� Avoid exposure to
direct ultra-violet radiation and radiant heat�
9.1. Transmitter Battery Replacement
Transmitter battery type is 3V Lithium CR2�
1� Loosen the cap by turning counter-clockwise with a coin�
2� Remove old battery and discard according to local
regulations on lithium batteries�
3� Install the new battery, positive end rst.
4� Replace the o-ring (size AS568-016, nitrile A70) and
lightly lubricate it with a silicone grease� When installing
the o-ring, roll it over the lip from the coin slot side� Do not
roll it over the threads�
5� Install the battery cap by turning clockwise� Start slowly
to avoid cross-threading the cap. The cap should be ush
with the case when properly installed�
See the Perdix Operating Instructions for handset battery
replacement instructions�
10. Servicing
There are no user serviceable parts inside the Perdix AI or
transmitter� Do not tighten or remove the faceplate screws�
Clean with water ONLY� Any solvents may damage the Perdix
AI dive computer�
Service of the Perdix AI may only be done at Shearwater
Research, or by any of our authorized service centers�
Your nearest service center can be found at
www�shearwater�com/contact
Glossary
CC - Closed circuit� Scuba diving using a rebreather where
exhaled gas is recirculated with carbon dioxide removed�
GTR - Gas Time Remaining� The time, in minutes, that can be
spent at the current depth and SAC rate until a direct ascent to the
surface would result in surfacing with the reserve tank pressure�
NDL - No Decompression Limit� The time, in minutes, that can be
spent at the current depth until mandatory decompression stops
will be required�
O
2
- Oxygen gas�
OC - Open circuit� Scuba diving where gas is exhaled into the
water (i�e� most diving)�
PPO
2
- Partial Pressure of Oxygen, sometimes PPO2�
RMV - Respiratory Minute Volume� Gas usage rate measured as
the volume of gas consumed, adjusted as if at a pressure of one
atmosphere� Units of Cuft/minute or L/minute�
SAC - Surface Air Consumption� Gas usage rate measured as the
rate of tank pressure change, adjusted as if at a pressure of one
atmosphere (i�e� surface pressure)� Units of PSI/minute or Bar/
minute�
• Check the distance from transmitter to handset� If
range related dropouts are occurring during diving,
locating the transmitter on short length of high pressure
hose is possible to decrease the transmitter to handset
distance�
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