heinrichs weikamp OSTC3 User manual

Owner´s manual
Open Source Tauch Computer

Thank you for choosing a heinrichs
weikamp dive computer.
Using open source software for full
transparency, combined with state-
of-the-art hardware and a robust
housing made of aluminum, OSTC3 is
your instrument of choice for technical
diving. Both at scubadiving and
rebreather diving the OSTC3 assists you
with extensive functions and options.
For trimix diving you can use up to ve
gases, in the rebreather mode you can
choose between xed setpoints or the
monitoring with an external sensor.
You can t the deco models to your own
needs. They also use the calculation with
gradient factors, which has become the
standard for technical diving. In addition
the OSTC3 offers an apnea and gauge
mode as well as a digital compass.
The development of the dive computer
of heinrichs weikamp is permanently
going on. Use the rmware updates to
keep your OTSC3 always up to date. Get
it for free at:
www.heinrichsweikamp.com

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We hope you enjoy diving with your new
OTSTC3 dive computer!
You can use the OSTC3 intuitively. But to
become familiar with its functions and
to use it in the best way, we recommend
you to read this manual carefully.
Contact
For any questions relating to your
OSTC3, please contact us via…
• internet forum:
forum.heinrichsweikamp.com
• E-Mail:
[e-mail]
• per mail:
heinrichs weikamp
Adlerstraße 7
79098 Freiburg im Breisgau
Germany
Your OSTC3

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Common advices......................................... 6
Technical status ..................................... 6
About this manual................................ 7
Functions overview............................... 8
Safety Advices............................................10
Requirements .......................................10
Before every dive .................................11
While diving..........................................14
Safe use of the OSTC3........................16
Environmental conditions................17
Before rst use ..........................................18
Handling.................................................19
Modes of operation............................21
Modes of diving ...................................24
Compass calibration............................. 2
Surface Mode.............................................29
Display in surface mode ...................29
Menu functions ...................................31
Logbook ...............................................33
Gas setup ............................................36
CCR Setup............................................42
Simulator ............................................48
Deco mode..........................................53
Settings................................................59
Content

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Dive mode ...................................................68
Displays in dive mode........................68
Menu functions ...................................73
Gaslist ..................................................76
Setpoint change................................76
Bailout..................................................77
Reset Avr..............................................77
Maintenance ..............................................79
Housing ..................................................79
Bungee....................................................80
Replacing the battery.........................81
Spare parts ............................................83
Readout the dive computer ..................84
USB connection....................................84
Software for the OSTC3.....................86
Updating the rmware .....................87
Technical data............................................89
Disposal........................................................91

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Technical status
This manual corresponds to the technical
status of OSTC3 and its rmware as of
November 2014.
OSTC3, its rmware and the
documentation are subject to technical
changes without notice.
The OSTC3 rmware (integrated
software) is an ongoing development. To
make the best use of OSTC3, we advise
you to use the latest stable rmware
available on the heinrichs weikamp
website: www.heinrichsweikamp.com
How to update the rmware, please read
page 88.
Standard settings
Unless noted differently, the information
in this manual refers to OSTC standard
settings.
For important settings, the OSTC3 shows
an asterisk * behind the current setting,
if the current setting is different from
the default setting.
Common advices

7
About this manual
Special markings
!Warning
indicates a situation that carries a
signicant risk or injury.
Caution
indicates a situation that carries a risk of
damage to the device.
Note
indicates additional information for
advanced OSTC3 user.
Terms of use
Copyright © heinrichs weikamp
Copying or reusing this manual or parts
of this manual is not allowed without
the written permission of heinrichs
weikamp.

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Functions overview
Your dive computer OSTC3 assists you
with the following functions:
Display
Diving depth and duration according
to EN 13319, maximum diving depth,
ambient temperature, duration and
depth of planned decostops, time to
desaturation based on diving depth and
duration
Oxygen surveillance in CCR diving (using
the optional hw HUD or the ppO2
monitor)
Additional informations (e.g. tilt-com-
pensated compass, average depth,
stopwatch, ppO2, CNS)
Planning
Congure and check gas mixtures as
well as setpoints and sensor data in
CCR mode, calculate a decoplan in the
simulator

9
Record
Time, duration, depth prole,
temperature, reference pressure and
time of desaturation

10
Requirements
The most important factor for safe diving
is a competent and well trained diver.
This dive computer is intended for
experienced divers. That implies:
It is necessary that your diving education
also included decompression diving.
Sufficient knowledge about the laws
of physics in diving is required. It may
harm your health if you rely on a wrong
congured dive computer.
Do not use this dive computer, if you
don’t know or understand the settings
and displayed information of OSTC3.
If necessary, you must be able to nish
your dive safely without a dive computer.
Don’t adjust decompression parameters
if you are not aware of their meanings.
Safety Advices