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Owner’s Manual

Open Source D CE Konformitätserklärung D RoHS Konformitätserklärung Die heinrichs weikamp GbR erklärt hiermit, dass alle von uns ab Die Produkte der heinrichs weikamp GbR entsprechen den An- Januar 2006 hergestellten Produkte RoHS-konform sind gemäss forderungen der Richtlinie des EU-Rates 89/336/EEC (EMV) EU Richtlinie 2002/95/EG bezüglich folgender Substanzen: und 2004/108/EC (EMV), ggf. ergänzt in der Angleichung der Rechtsvorschriften der Mitgliedstaaten in Bezug auf die Blei (Pb) Cadmium(Cd) elektromagnetische Verträglichkeit. sechswertiges Chrom(Cr(VI)) Quecksilber(Hg) GB CE Declaration of conformity Polybromierte Biphenyle (PBB) Polybromierte Diphenylether (PBDE) Products by heinrichs weikamp comply with the requirements of the Council Directives 89/336/EEC (EMV) and 2004/108/ GB Declaration of RoHS Compliance EC (EMV), as amended where applicable on the approxima- heinrichs weikamp GbR herewith declares that as of January tion of the laws of the member states relating to Electromag- 2006, all our products are manufactured RoHS conformal, fully netic Compatibility. complying with EU Directive 2002/95/EC with respect to the following substances: Lead (Pb) Cadmium(Cd) Hexalvalent Chromium(Cr(VI)) Mercury(Hg) Polybrominated biphenyls (PBB) heinrichs weikamp GbR, 79098 Freiburg Polybrominated diphenylethers (PBDE) Freiburg, 2010 heinrichs weikamp GbR, 79098 Freiburg Freiburg, 2010

Christian Weikamp Matthias Heinrichs Christian Weikamp Matthias Heinrichs Your OSTC2

Thank you for choosing a heinrichs Functions Overview Record weikamp dive computer. • Time, duration, depth profile, tem- The Open Source Dive Computer OSTC2 perature, reference and time Using open source software for full assists you with the following func- to desaturation transparency, combined with state-of- tions: the-art hardware and robust design, OSTC2 is your instrument of choice for Display Contacting us . • Diving depth and duration according to EN 13119 If you have any questions regarding the We hope you enjoy diving with your • Maximum diving depth OSTC2, you can reach us new OSTC2 dive computer. • Ambient • on the Internet forum • www.heinrichsweikamp.com To become familiar with the functions • Bottom time • via e-mail: of OSTC2 and to use it correctly, it is rec- • Duration and depth of planned [email protected] ommended that you read this manual decostops carefully. • Time to desaturation based on diving Postal Address depth and duration heinrichs weikamp Planning Adlerstraße 7 • Set and retrieve gas mixtures match- 79098 Freiburg im Breisgau ing the Germany • Calculate a decoplan in the simulator

3 Contents

Your OSTC2...... 3 Basics...... 12 Menu Functions in Surface Mode...... 20 Functions Overview...... 3 Preparations for first use...... 12 Logbook – Recorded Dive Data...... 21 Contacting us...... 3 Control Elements and Menus...... 12 Charging the Battery...... 13 Gas Setup – Adapting Scuba Gas Contents...... 4 OSTC2 Modes of Operation...... 14 Mixes...... 22 Device Overview...... 6 Display in Surface Mode...... 17 Reset Menu...... 24 Left/Front/Top View...... 6 Surface screen...... 17 Bottom View...... 7 Setup – Adjusting Base Settings...... 25 Desaturation diagram...... 18 Configuring Custom Functions...... 25 General Notes...... 8 Gaslist...... 18 Salinity...... 26 Technical Status...... 8 Setpoints...... 18 Decotype – OSTC2 Dive Setting...... 27 User Settings...... 8 Surface Interval...... 19 Date Format...... 27 About this Manual...... 8 Debug...... 27 Warnings and Safety Advice...... 9 Show License...... 27 Precautions...... 9 Set Time and Date...... 28 Before Every Dive...... 9 Set Time ...... 28 While Diving...... 10 Safe Use of OSTC2 ...... 11 Environmental Conditions...... 11

4 Contents

CCR SetPoint Menu – Closed Circuit Menu Functions in Dive Mode...... 36 Cleaning and Care...... 40 Settings...... 29 Set Gas ...... 36 USB Interface...... 41 SetPoint...... 37 Battery Information...... 30 Installing the Driver...... 41 Bailout...... 37 Transferring data and settings...... 41 Simulator...... 31 Display...... 37 Updating the firmware...... 41 Gas List...... 37 Calculate Decoplan...... 31 ResetAvr...... 38 Technical Specifications...... 42 Simulating Dive Mode...... 32 ToogleGF...... 38

Display in Dive Mode...... 33 CustomViews in DiveMode...... 38 Main display in dive mode/Closed Stopwatch...... 39 Circuit...... 33 Marker...... 39 Main display in dive mode/Open Time...... 39 Circuit...... 34 Lead Tiss...... 39 Main display in dive mode/ Avr.Depth...... 39 Gauge, Apnoe...... 35 Average depth since the start of the dive...... 39 Graph...... 39 EAD / END...... 39 FutureTTS...... 39

5 Device Overview

Left/Front/Top View

1 3

4

2

1 Display 2 SET/MENU button (contact switch)) 3 ENTER button (contact switch ) 4 Bungee mount

6 Device Overview

Bottom View

7 8 9

7 Pressure sensor 8 USB connector with protective cap 9 LED-Statusdisplay

7 General Notes

Technical Status User Settings About this Manual

This manual corresponds to the techni- Unless noted differently, the informa- Special Markings cal status of OSTC2 and its firmware as tion in this manual refers to OSTC2 of May, 2013. standard settings. WARNING:indicates a situation that carries a significant risk of injury. OSTC2, its firmware and the documen- Values, formats, units and display set- tation are subject to technical changes tings which can be adjusted by the user CAUTION: Indicates a situation that car- without notice. are marked with an asterisk * in this ries a risk of damage to the device. manual. OSTC2 firmware (integrated software) Terms of Use is being continually enhanced. To make the best use of OSTC2, we advise you to Copyright © heinrichs weikamp. use the latest stable firmware available on the heinrichs weikamp website: Copying or reusing this manual, or parts of this manual, is not allowed without http://www.heinrichsweikamp.com/ the written permission of heinrichs ostc2 weikamp GbR.

When updating the firmware, please refer to section USB Interface: Updating the Firmware.

8 Warnings and Safety Advice

!! WARNING • It is mandatory to hold a decompres- and allows for a reliable performance of sion scuba dive qualification for use OSTC2. For your own safety, follow the safety of OSTC2 diving computers. advice given below. Configured Correctly? Check the set- tings of your OSTC2. If necessary, adjust Before Every Dive the settings according to your dive plan Precautions and equipment. Plan your dive. The most important factor in diving Battery charged? Check the battery safely is a competent and well trained Set up a dive plan independently from status using the battery charge indi- diver, diving within their abilities. OSTC2, and take it with you when div- cator on the display. To ensure reliable ing. performance throughout your dive, the This dive computer is intended for ex- battery must be charged sufficiently. perienced divers. That implies: Make sure that your OSTC2 is ready for With the display at full brightness, a • Sufficient knowledge about the laws use and correctly configured. fully charged battery lasts more than of physics in diving is required. 40 hours in dive mode. In the course of • Relying on a wrongly configured dive Always confirm the following questions its lifecycle, battery life may decrease. computer might damage your health. before diving: • Do not use this dive computer if you Device waterproof? Ensure that the are not familiar with or don’t un- Stable Firmware? Use only firmware USB connector cap is properly closed derstand the settings and displayed provided by heinrichs weikamp which and watertight. Check the housing for information of OSTC2. is marked as “stable”. It has been tested cracks or damages which might allow • If necessary, you must be able to fin- water to intrude. ish your dive safely without the aid of a dive computer.

9 Warnings and Safety Advice

Functioning pressure sensor? Ensure While Diving Caution Saturation data is lost when that the opening of the pressure sensor updating the OSTC2 firmware or in the is neither clogged nor soiled Take a backup system with you. unlikely event of a failure. In these cas- es, do not dive any further until tissue Safely attached? Make sure OSTC2 While diving, always carry a backup saturation has returned to normal. can be fastened safely using either the system to measure duration and diving bungee cord or a suitable alternative. depth independently from OSTC2

Display messages? Check the display Take OSTC2 with you on every repeat of OSTC2 for warnings or other signals. dive – don’t lend it to anyone. Do not dive if the OSTC displays a warn- ing, e.g. the warning symbol. Check the A correct calculation of tissue satura- cause for the warning. tion requires that OSTC2 • is configured correctly • is used on every dive • is only used to record data during your own dives (and not shared with other divers)

Take a sufficiently long surface break before diving again.

OSTC2 does not explicitly indicate how long to wait before the next dive. Please adhere to the guidelines you were taught during your diver’s training.

10 Warnings and Safety Advice

Safe Use of OSTC2 Environmental Conditions

Do not modify the hardware. Store the OSTC2 in a cool, dry place.

Modifications to the hardware of OSTC2 Permissible temperature range for use can negatively impact its reliability and and storage: 0 °C to 40 °C the leak tightness of its housing. Maximum water depth: 120 m Only the cap of the USB connector can be removed. There is no other way to Caution open the housing without damaging • Surpassing the maximum water the device. depth may cause malfunctioning or permanent damage of the device. It is imperative that the o-rings on the • The ZH-L16 calculation model is valid USB cap are kept clean and free of hair, only up to a depth of 120 m. grit, dirt, lint etc.

Keep your OSTC2 out of children’s reach

Small parts such as the USB connector cap may represent a choking and configuration may be indadvertedly al- tered without the divers knowledge.

11 Basics

Preparations for first use Control Elements and Menus

You receive your new OSTC2 ready- for-use from heinrichs weikamp. If the OSTC2 has not been used for a pro- Buttons Operate the OSTC2 using the In some menus, you will find aMore en- longed period of time, it may be neces- two red buttons SET/MENU and ENTER try. Select this entry to access the next sary to recharge the battery first. on the left and right side, respectively. menu page with more menu items. The buttons are contact switches which Before diving, you need to adjust some respond to short finger pressure. You To change the setting of a menu item, settings as described in this manual. don’t need to hold the buttons down. press ENTER repeatedly until the re- quired value is displayed. Note that for Familiarize yourself with the OSTC2. It is Menus The basic principles of opera- some numerical settings, you have to recommended that you read this manu- tion that are described below apply to adjust the direction and increment of al carefully and entirely. most functions of the OSTC2. If nec- change separately. essary, the documentation indicates when to use these buttons differently. Note The pre-menu Menu? avoids that the menu is displayed by mistake. To display the menu, press SET/MENU. Confirm the pre-menu by pressing The display shows the pre-menu Menu?. ENTER­ within 5 seconds, otherwise the Press ENTER to confirm. OSTC2 will return to the normal display.

To select a menu entry, press SET/MENU . repeatedly until the cursor marks the required menu item. From the item on the bottom, the cursor jumps back to the top.

12 Basics

Charging the Battery

The battery of the OSTC2 is charged us- When the battery symbol is green, ing the USB connector. The delivery in- charging is complete (i.e. the battery is cludes a USB cable. charged at least 95%).

Your OSTC2 must be charged in a dry Once charging is completed, disconnect environment to avoid damages caused the USB cable and screw the lid on the by corrosion or a short circuit.. USB connector to make it watertight.

1. Unscrew and remove the protective The USB plug of the cable can be used lid from the USB connector. as ‘screwdriver’ for the cap.

2. Connect the USB connector to a If you do not use the OSTC2 for an ex- computer or a standard USB char- tended period of time, you can leave it ger. connected to the USB charger until next use. 3. The OSTC2 is being charged while the connected computer or USB Charging an empty battery might take charger is in operation. up to eight hours.

4. While the battery is being charged, Note The OSTC2 comes with an in- the battery symbol is yellow. tegrated magnetic reset switch. When charging, do not place the OSTC2 near a magnet that might trigger the mag- netic switch.

13 Basics

OSTC2 Modes of Operation Dive Mode Tip The integrated simulator allows you to get acquainted with the func- OSTC2 has three modes of operation The OSTC2 automatically switches into tions of the dive mode. and switches automatically between dive mode when it is at least 1.6 m* be- them: low the surface for five seconds. Sleep Mode

Surface Mode In dive mode, the display shows When the OSTC2 is not operated at the diving depth, elapsed time since start- surface, it switches into sleep mode af- To wake up the OSTC2, press SET/MENU ing the dive, maximum depth since ter 2 minutes* to save battery. or ENTER. starting the dive, the currently selected gas and in- In sleep mode, the display is turned off. When in surface mode, the display formation including Future TTS if con- Ambient pressure is measured at regu- shows general information – current figured.* lar intervals. After a dive, decompression time, date, temperature, ambient pres- calculation continues in sleep mode. sure and battery charging status. After Pressing ENTER toggles additional in- a dive, the display also shows tissue formation provided as Custom View saturation and remaining time in the like EAD/END, Average Depth, Time or no-fly period. Stopwatch.

In surface mode, you can adjust the set- Note It is not possible to switch un- tings in preparation for the next dive, derwater from dive mode to surface read recorded dive data and adjust the mode; hence you cannot change the base settings of the OSTC2. base settings while diving. Note that exceptions apply to the Apnoe setting.

14 Basics

OSTC2 Dive Settings Dive settings Dive settings with decompression calculation without decompression calculation You can configure the OSTC2 to match your equipment and how you intend ZH-L16 OC, L16-GF OC Use these dive Gauge Use this dive setting if you do to use it. Furthermore, you can select a settings with regular (open circuit) dive not use the OSTC2 for decompression model for decompression calculation. equipment. calculation.

To select a dive setting, select Setup > The decompression calculation model is With this dive setting, OSTC2 serves as Decotype, then choose one of the dive Bühlmann ZH-L16 for open circuit with a . Additionally displayed settings described below. or without gradient factors. and recorded are ambient temperature and elapsed time since starting the Note The displayed information is ZH-L16 CC, L16-GF CC Use these dive. Decompression and saturation adapted according to the chosen dive dive settings with a closed circuit calculation are switched off. setting. In dive mode, menu items are rebreather. adapted as well. Apnoe Use this setting for apnea div- The decompression calculation model ing or . is Bühlmann ZH-L16 for closed circuit with or without gradient factors. With this dive setting, the OSTC2 serves as a depth gauge. Additionally displayed pSCR-GF With pSCR O2 Drop and lung and recorded are ambient temperature ratio modify the calculation of ppO2. and elapsed time since starting the The basic values can be configured in dive. Decompression and saturation CF61, CF62 and CF63. calculation are switched off. Dive time is displayed in minutes*.

15 Basics

With the Apnoe setting, the OSTC2 re- mains in dive mode even when diving at low depths. You can switch into sur- face mode at any time by pressing SET/ MENU?. Press ENTER to confirm the Quit? alert.

Above a defined depth* and after a de- fined delay*, the OSTC2 switches auto- matically into surface mode.

16 Display in Surface Mode

Surface screen

1 10 2 3 4 11 5 6 12 7 8 13 9

1 Dive setting: OC, CC, CF, pSCR, 8 Battery charge indicator / battery 12 First gas mix (OC) or partial Gauge or Apnea voltage* pressure at setpoint 1 (CC), depen- 2 Ambient pressure 9 Custom text (up to 23 characters) ding on the dive setting. 3 Time 10 Installed firmware version 13 Gas overview, additional active gases 4 Date 11 CustomView: Desaturation dia- 5 Ambient temperature gram, gas list (OC), setpoints (CC), Surface Intervall, Desaturation in 6 Remaining no-fly time %. Display toogled with right but- (hours:minutes). ton. 7 Remaining desaturation time (hours:minutes).

17 Display in Surface Mode

Desaturation diagram The numeric value is the lead tissue sat- no ). For any other gas mix, the uration percentage. respective percentages of oxygen and When using a dive setting with decom- helium fractions are displayed. pression calculation, a desaturation dia- The first scale division marks a satura- gram is available. tion of 80%. Each following division cor- Gaslist contains the other four preset responds approximately to the decrease gas mixes with their respective percent- Press ENTER to switch between desatu- over the half-life for the respective type ages of oxygen and helium fractions. ration diagram and gas list (OC) or set- of tissue. points (CC). If the sum of oxygen and helium frac- TIP The same desaturation diagram is tions is less than 21%, the gas list shows N2 also available in the dive mode (More > ERR indicating an unusual gas mix. 80% Graphs). He Setpoints Gaslist After a dive, you can see the approxi- When using a closed circuit dive set- mate tissue saturation in the desatura- When using an open circuit dive set- ting, the list of available setpoints can tion diagram. ting, the list of available gas mixes can be shown on the display at position 11. be shown on the display at position 11. The lines in the upper section represent Press ENTER to switch between set- nitrogen saturation, the lines in the Press ENTER to switch between gas list points list and desaturation diagram. lower section helium saturation of the and desaturation diagram. 16 types of tissue according the Bühl- The setpoints list shows the oxygen mann model. The first gas mix used when starting for the three setpoints your dive is displayed at position 12. (SP) and the oxygen and helium frac- Air means (21% oxygen,

18 Display in Surface Mode

tions of the diluent. The first setpoint is permanently displayed at position 11.

Surface Interval

Time passed since last recorded dive.

BSat/BDes/Last

Last Decostop depth is shown .* BSat (Bühlmann Saturation) as well as BDes (Bühlmann Desaturation) are shown. Those two parameters are rele- vant conservatism parameters for non- gradient factor dive setups.

Dive Setting Display

In surface mode, the dive setting is displayed on top of the left side.

19 Menu Functions in Surface Mode

You can adjust the settings to prepare Logbook Look up recorded data from Set Time Set date and time the next dive, read recorded dive data recent dives and adjust the base settings of OSTC2. CCR SetPoint Menu Inspect and modi- Gas Setup Set gas mixes matching fy closed circuit rebreather settings Press SET/MENU in order to access the the scuba set menu in surface mode. The display Battery Info Display Battery charge shows the pre-menu Menu?. Press Reset Menu Reset the OSTC2 settings status ENTER ­to confirm. to their default values; stop decompres- Menu: sion calculation; delete recorded data; Simulator Simulate dive mode; calcu- restart the OSTC2 late decostops Logbook Gas Setup Reset Menu Setup Inspect and modify base set- See the following sections for more de- Setup tings for OSTC2 functions tails. More Exit Choose More for the following entries: Logbook

20 Logbook – Recorded Dive Data

The OSTC2 records data during every OSTC2 stores data of approximately 20 dive. It can be retrieved from the Log- to 30 typical dives. The actual number book. of records depends on the overall size of data. If the memory is full, existing re- cords will be overwritten, starting with the oldest.

Tip If you want to secure your record- ed dive data, you can connect the OSTC2 to a computer and read out the data.

Displaying details TIP To display the actual number of dives instead of the position index, you The details page also shows: can configure Custom Function 28. Memory • 1st line - position index, date, time • 2nd line - maximum diving depth, TIP More information including Logbook entries are sorted in duration, minimum ambient tem- Gaslist, Salinity, CNS and Average Depth chronological order, starting with the perature can be found on page 2 and 3 (toogled most recent entry. Every entry shows: • 3rd line – ambient pressure above with left button). • 1st row - Position index water (used as reference for depth (01 = most recent), measurement), desaturation time • 2nd row - Date (month/day), (hours:minutes) • 3rd row - Maximum dive depth • 4th row - Dive duration (minutes)

21 Gas Setup – Adapting Scuba Gas Mixes

Use Gas Setup to configure presets for erence, the OSTC2 displays the calculat- up to five gas mixes. You can switch ed maximum diving depth (MOD) next between these presets while diving, to the O2 entry. whenever you exchange gases. Reverting to default values

To revert a gas mix preset to standard values, select the Default entry and press ENTER.

Setting the composition

Specify the composition of a gas mix by setting the percentage of the oxygen and helium fraction, respectively. The presets are marked like this: AIR for compressed air (21% oxygen, no he- First, choose whether to increase or de- lium), NX for and TX for . crease the fraction. Select the +/– entry. Press ENTER to switch between increas- To inspect and modify a preset, go to ing (+) and decreasing (–) the value. Setting the operation depth the Gas Setup menu, select the desired preset and press ENTER. Next, select the O2 entry for the oxygen To set the operation depth for a pre- fraction or the He entry for the helium set gas mix, select More, then select fraction. Press ENTER repeatedly until Depth + or Depth –. The current opera- the required value is displayed. For ref- tion depth is shown in the first line of

22 Gas Setup – Adapting Scuba Gas Mixes

the display, the calculated correspond- ing oxygen partial pressure (ppO2) in the fourth line, next to the Change en- try.

Configure usage

To use a gas mix right at the start, set First Gas? to Yes. On the Gas List, the first gas mix is marked with an asterisk (Gn:*), all other gas mixes are marked Gn::.

Note A gas mix with an operation depth of 0 m is used only when First Gas? is set to Yes.

If a certain gas mix is not available, you can disable the respective entry on the gas list. To do this, set Active Gas? to No. Deactivated entries are dimmed out on the display (text turns dark blue).

23 Reset Menu

This menu allows you to reset all set- all recorded dive data or Cancel to keep saturation (fully desaturated) for its cal- tings of the OSTC2 to their default val- the data. culations. ues, stop decompression calculation prematurely, delete recorded data, or Note Deleted dive data cannot be re- Caution Use Reboot OSTC and Re- restart the OSTC2. stored. set only if you do not plan a repeat dive within the next 48 hours. To leave the Reset Menu, select Cancel Rebooting the OSTC2 Reset or Exit. The OSTC2 needs to be rebooted during Reverting settings to default the installation of a new firmware.

To reset all user settings from the Gas To reboot, select the Reboot OSTC entry Setup, Setup menu and decompression and press ENTER. You will be prompted data to their default values, select the to confirm the reboot (Confirm?). Select Reset CF, Gas & Deco entry, then press OK to confirm the reboot or Cancel to ENTER. You will be prompted to confirm perform no reboot. the reset (Confirm?). Select OK to con- firm the reset or Cancel to perform no Caution Rebooting deletes the cur- reset. rent decompression data.

Deleting Logbook data Deleting decompression data

To delete all recorded dive data, select To delete current decompression data, the Reset Logbook entry and press select the Reset decodata entry and ENTER­. You will be prompted to confirm press ENTER. When you start the next the reset (Confirm?). Select OK to delete dive, the OSTC2 will use normal tissue

24 Setup – Adjusting Base Settings

Select Setup on the main menu to dis- Custom Functions play the Setup menu, where you can inspect and adjust the base settings of Custom functions are parameters that your OSTC2. control the functions of the OSTC2.

For a current list of all available Custom Functions, see the OSTC wiki at http:// www.heinrichsweikamp.com.

Configuring Custom Functions On the display, the second line shows Custom Functions are divided by their the ordinal number, the parameter ordinal number into three menus, Cus- name as well as the unit of the param- tom Functions I (parameters 0 to 31), eter value in square brackets. Custom Functions II (parameters 32 to 63) and Custom Functions III (param- To increase or decrease the parameter eters 64 to 95). value, select the +/– entry. Press ENTER to switch between increasing (+) and Tip You can also configure Custom decreasing (–) the value. Functions and other settings from a PC using SubSurface, Diving Log or JDiveL- To set the increment by which the val- og software. ue is increased or decreased, select the 1/10 entry. Press ENTER to switch be- Select Setup and then Custom Func- tween an increment of 1 or 10. tions I, Custom Functions II or Custom Functions III.

25 Setup – Adjusting Base Settings

Next, select the Current entry and press To reset a particular parameter to its de- Salinity ENTER repeatedly until the required fault value, select the Default entry and value is displayed. You can change the press ENTER. This setting allows you to adjust salini- direction and increment at any time. ty, used for calculating both current and Note All Custom Functions are ad- maximum depths. Note For technical reasons, the pos- justed to a tested value suitable for this sible numeric range for parameter val- application. The default salinity is based on a densi- ues is ty of water of 1.00 kg/l. To increase this • 0 to 255, for entries with 8 bit word value, select the Salinity entry and press size ENTER repeatedly until the required • 0 bis 32767, for entries with 15 bit value is displayed. The value range is word size 1.00 kg/l to 1.04 kg/l.

Note that the possible numeric range Note Decompression information is includes unsuitable or even dangerous based upon absolute pressure and not values. relative pressure and therefore salinity does not effect this calculation. !! WARNING

Keep to the value range that is recom- mended for the respective Custom Function. Some Custom Functions im- pact critical safety-related functions and displays.

26 Setup – Adjusting Base Settings

Decotype – OSTC2 Dive Setting ing the Bühlmann ZH-L16 model with Debug gradient factors Select the required dive setting and the To display additional information for type of decompression calculation. L16-GF CC Decompression calculation the analysis of errors, set Debug to ON. for closed circuit rebreather using the This setting is intended to assist pro- ZH-L16 OC Decompression calculation Bühlmann ZH-L16 model with gradient grammers and developers and is not re- for open circuit (normal scuba gear) us- factors quired for normal operation. ing the Bühlmann ZH-L16 model pSCR-GF Decompression calculation ZH-L16 CC Decompression calculation for passive semi closed circuit rebreath- Show License for closed circuit rebreather using the er using the Bühlmann ZH-L16 model Bühlmann ZH-L16 model with gradient factors and O2 drop as Select this entry to display the terms of well as lung ratio. license for the firmware. Gauge Disables decompression/satu- ration calculation and no-fly warning. Choose More to access the following The OSTC2 records diving depth, time entries: and temperature.

Apnoe Disables decompression/satu- Date Format ration calculation and no-fly warning. The OSTC2 records diving depth, time Set the displayed date format: and temperature. • YYMMDD: year, month, day • DDMMYY: day, month, year L16-GF OC Decompression calculation • MMDDYY: month, day, year for open circuit (normal scuba gear) us-

27 Set Time and Date

Set Time 3. After Set Year, press SET/MENU to restart the clock at second :01 after To set date and time for the OSTC2, se- the set time. lect More from the main menu, then Set Time.

While setting the date and time, the clock is paused (whereas desaturation calculation continues). When you have set the new date and time, you can re- start the clock to the second. Set Time: Time:11:21 Date:17.05.13

Set Hours

1. Press ENTER repeatedly until the re- quired value is displayed. 2. Press SET/MENU to select the next setting – from hour to minute, to month, to day and to year.

28 CCR SetPoint Menu – Closed Circuit Rebreather Settings

When using a closed circuit rebreather, Select the first menu entry and press you can set the OSTC2 to the corre- ENTER to select setpoint 1, 2 or 3 (SP#1, sponding CCR setpoint. You can specify SP#2, SP#3). setpoints in the CCR SetPoint Menu. To increase oxygen partial pressure for NOTE OST2 does not display the PPo2 the selected setpoint, select ppO2 + of the breathing loop and therefore and press ENTER repeatedly. The value you cannot use it as a PPo2 display. In increases in steps of 0.01 bar. the context of CCR diving the OSTC2 can only serve as a constant PPo2 de- To decrease oxygen partial pressure for compression computer and not as the selected setpoint, select ppO2 – and PPo2 display or a setpoint controller.. press ENTER repeatedly. The value de- creases in steps of 0.01 bar.

To revert to the default value for oxygen partial pressure, select Default:1.00 and press ENTER.

If required, repeat these steps for the other setpoints.

29 Battery Information

Select Battery Informtion to display de- • Tmax: Maximum ambient tempera- tailed information about the battery. ture with date • Total Dives: Counter of all real dives done with this computer

Press ENTER to exit Battery Information and return to the menu.

• Cycles: Number of complete charge cycles (battery charged up to at least 95% of its capacity) • Last Complete: Date of the last com- plete charge • Lowest Vbatt: Minimum battery voltage • Lowest at: Date of minimum battery voltage • Tmin: Minimum ambient tempera- ture with date

30 Simulator

Use the simulator to • Bottom Time can be increased in When the calculation is done, select • simulate the dive mode of the OSTC2 steps of 2 minutes up to a maximum Show Decoplan to display the calculat- • calculate the decoplan for the speci- of 199 minutes. ed decompression plan with duration fied maximum depth and retention • Max. Depth can be increased in and depth of the planned decompres- period at the bottom. steps of 3 meters up to maximum of sion stops. 99 meters

If you accidentally exceed the desired value, select Exit to leave the simulator menu. Select the simulator again and set the correct values.

To start calculation, select Calculate Deco and press ENTER.

Please wait for the calculation of the de- Calculate Decoplan compression plan. Calculation may take some time, depending on the specified Depth is displayed in meters, duration is As a planning aid, the OSTC2 can calcu- bottom time. displayed in minutes. Duration is addi- late decompression stops previous to a tionally represented by the width of the planned dive. TIP During calculation, the Bottom respective bar. Time value counts down, indicating the First, set the desired values for bottom remaining minutes of bottom time to time and maximum depth. Select the be calculated. Note Only the six deepest decom- respective menu entry and press ENTER pression stop are displayed. until the required value is displayed.

31 Simulator

Simulating Dive Mode depth has reached 0 m. The dive mode Altimeter simulation will stop after a short delay. The simulator allows you to simulate Enables the use of the pressure sensor the diving mode in order to become fa- Note Both in dive mode and during for (not so perfect) barometric mea- miliar with its functions above the sur- a simulation, the OSTC2 cannot switch surements in surface mode. The sen- face. to sleep mode. Remember to quit the sor build in the OSTC2 is specified for a dive mode simulation when you’re large pressure range of several bars and Start Dive Select Start Dive to start done, otherwise you might exhaust the not barometric range specific. It does the simulator. The value specified for capacity of both battery and logbook not replace an altimeter. Max. Depth is adapted as current div- memory. ing depth. All other available functions are similar Changing diving depth Unlike the dive to the ones in dive mode and are de- mode, the simulator has an additional scribed there. menu for diving depth, where you can set the simulated diving depth. Press ENTER to display the depth menu. Use SET/MENU to select the desired change in depth, then press ENTER to confirm: • +1m, +10m: descend 1 m or 10 m • -1m, -10m: descend 1 m or 10 m

Quitting dive mode To quit the dive mode, simulate an ascent. In the depth menu, select -10m and press ENTER repeatedly until the displayed diving

32 Display in Dive Mode

Main display in dive mode/Closed Circuit

8 1 9 2 3 10 4 5 11 6 7 12

1 Diving depth in meters 6 Composition of the selected dilu- 10 TTS: total duration of deco­stops; 2 CNS: percentage ent or bailout gas (oxygen/helium) No Stop: no decostop planned, (displayed when required) or rate 7 Max Maximum diving depth remaining dive time until the first decostop of descent in m/min 8 Divetime: Dive time in minutes* 11 CustomView: Stopwatch, Marker, 3 ppO2: oxygen partial pressure in 9 Decostop: Depth and duration of Time, LeadTiss., Avr.Depth, Tissue- bar (displayed when required) the next decostop (if available) Graph, EAD/END, FutureTTS 4 GF: present gradient factor 12 Ambient temperature 5 Oxygen partial pressure for the selected setpoint; Bail for bailout

33 Display in Dive Mode

Main display in dive mode/Open Circuit

7 1 8 2 3 9 4 10 5 6 11

1 Diving depth in meters 7 Max Maximum diving depth 11 CustomView: Stopwatch, Marker, 2 CNS: oxygen toxicity percentage 8 Divetime: Dive time in minutes* Time, LeadTiss., Avr.Depth, Tissue- Graph, EAD/END, FutureTTS (displayed when required) or rate 9 Decostop: Depth and duration of of descent in m/min the next decostop (if available) 12 Ambient temperature 3 ppO2: oxygen partial pressure in 10 TTS: total duration of deco­stops; bar (displayed when required) No Stop: no decostop planned, 4 GF: present gradient factor remaining dive time until the first 6 Composition of the selected dilu- decostop ent or bailout gas (oxygen/helium)

34 Display in Dive Mode

Main display in dive mode/Gauge, Apnoe

1 5 2 6

7 3

4

1 Diving depth in meters 7 Descent: Elapsed time since last 2 CNS: oxygen toxicity percentage descent (minutes:seconds) (displayed when required) or rate of descent in m/min 3 Max Maximum diving depth 4 Ambient temperature 5 Divetime: Total dive time (minutes:seconds) 6 Surface: Surface time (minutes:seconds) 35 Menu Functions in Dive Mode

When the computer is in dive mode and Decompression data Set Gas set to OC, CC, pSCR or Gauge, you may use the menu to Decoplan (OC, CC) shows the decom- For Open Circuit, Gauge • select a preset gas mix (OC, Gauge) pression plan as a list of decompres- or setpoints and bailout gases (CC) sion stages. The current decompression This setting allows you to select the • show decoplan stage is also shown on the main dis- currently used gas mix. You may choose • reset Average Depth / toogle gradi- play. between the presets made in Gas Setup ent factors / ... (in surface mode). Oxygen and helium • toggle display brightness Selecting a fractions of the current gas mix are dis- played on the main display. Note The Apnoe dive mode does not Gas List (OC, Gauge) allows you to switch have a menu. between the five preset gas mixes. Select O2 + or O2 –, to increase or de- crease the oxygen fraction. To display the menu in dive mode, press Set Gas (OC, Gauge) allows you to mod- SET/MENU. The display shows the pre- ify the current composition of the gas Select He + oder He – to increase or de- menu Menu?. Press ENTER to confirm. mix during the dive. crease the helium fraction.

The third menu entry depends on the SetPoint (CC) allows you to switch be- Press ENTER repeatedly until the re- CustomView in the right low part of the tween the three preset setpoints. quired value is displayed. dive mode screen. Bailout (CC) allows you to select one of The new value is displayed in the first the three preset bailout gases. line, next to Sel.

In order to apply the new setting select the first entry Sel and press ENTER.

36 Menu Functions in Dive Mode

In order to revert to the preset gas mix, Display select it again from the Gas List. Select Display to switch between full (default) and reduced brightness of the SetPoint display. At full brightness, text appears in white; at reduced brightness, it ap- For Closed Circuit pears in a yellowish shade.

Choose between the three setpoints Note The display brightness setting that have been configured in Gas Setup applies only to dive mode; the setting is (surface mode). Oxygen and helium retained for the next dive. fraction of the current gas mix are dis- Press ENTER to hide the list. played on the main screen. Decoplan If required, the next decompression stop is permanently shown on the main Bailout Select Decoplan to display the list of display. currently planned decompression stops. For Closed Circuit For each planned decompression stop, Gas List Select the current bailout gas mix. You depth in meters and duration in min- can choose between five preset gas utes are displayed. Duration is addition- For Open Circuit, Gauge mixes already configured in Gas Setup ally represented by the width of the re- (surface mode). Oxygen and helium spective bar. This setting allows you to select the fraction of the current gas mix are dis- currently used gas mix. You may choose played on the main screen. If no decompression stops are required, between the presets made in Gas Setup No Deco is displayed. (in surface mode). Oxygen and helium

37 CustomViews in DiveMode

fractions of the current gas mix are dis- ToogleGF played on the main display. Use either the standard or the alterna- tive gradient factor pair. This is available only if CF 67, CF68 and CF69 is config- ured in surface mode.

SetMarker

Sets a marker at the current position in the profil

ResetAvr

Sets Stopwatch to zero and reset the av- erage depth of the stopwatch.

38 CustomViews in DiveMode

Stopwatch Avr.Depth The numeric value is the saturation per- centage of the lead tissue. The stopwatch counts seconds and Average depth since the start of the minutes. The value left of the stop- dive. The first scale division marks a satura- watch is the average depth since start- tion of 80%. Each following division cor- ing the stopwatch. responds approximately to the decrease Graph over the half-life for the respective type The stopwatch is resetted via Menu > of tissue. ResetAvr. Displays a desaturation diagram show- ing the calculated nitrogen and helium saturation. EAD / END Marker N2 as well as Equiva- Allows to set a marker via Menu > Set- 80% lent Narcotic Depth is shown. Marker He

FutureTTS Time The diagram visualises the approximate saturation values during the dive. TTS time for ascent after additional xx Actual time of the day. minutes on the current depth The lines in the upper section represent nitrogen saturation, the lines in the Lead Tiss. lower section show the helium satura- GF Values tion of the 16 types of tissue according Displays the type of tissue with the the Bühlmann model. Overview of both gradient factor pairs. most significant saturation. The active one is colored white.

39 Cleaning and Care

Housing Power supply

Use freshwater to rinse OSTC2 after ev- The Li-Ion rechargeable battery is sealed ery dive, particularly after diving in - in gel for safety reasons. water.

If necessary, dissolve dirt by immersing OSTC2 into freshwater for some hours. Do not use cleaning agents or solvents.

Caution Never insert pointed ob- jects into the opening of the pressure sensor.

Wristband / Bungee

The OSTC2 ships with bungee. The bun- gee can be detached and is hand wash- able and can be replaced, if necessary.

40 USB Interface

The USB interface can be used for 3. Connect the USB interface of the Updating the firmware charging the battery, for data exchange OSTC2 to your computer. Windows between the OSTC2 and a connected will automatically recognize the The OSTC2 firmware (integrated soft- computer, and for installing new firm- OSTC2 as a new device. ware) is in the constant process of im- ware for the OSTC2. 4. When Windows asks for a driver provement. To make the most of your medium, point to the directory con- OSTC2, it is advisable to use the latest While the OSTC2 is connected to a suit- taining the unpacked driver soft- stable firmware that is available at the able USB port or a standard USB char- ware. heinrichs weikamp website: ger, the battery charges. For details see the section Basics: Charging the Battery. After installation has completed, the http://www.heinrichsweikamp.com/ OSTC2 interface becomes part of the ostc Note Links to all mentioned software “Ports” branch in the Windows Device resources can be found at http://www. Manager; it is listed as “USB Serial Port Note Linux and Macintosh users heinrichsweikamp.com (COM x)”. can install firmware updates using the JDiveLog­ application or SubSurface.

Installing the Driver Transferring data and settings

When connecting a computer to your Data transfer with the OSTC2 is sup- OSTC2 for the first time, you will need ported by two software applications to install a device driver, which is avail- – DivingLog and JDiveLog. Both applica- able for Windows, Mac OS X and Linux. tions provide easy-to-operate functions 1. Download the FT232R interface for transferring recorded dive data, and driver. for configuring and remotely control- ling your OSTC2. 2. Unpack the zip archive to a direc- tory. 41 Technical Specifications

Processor Low Power Microchip PIC18LF4685 Data storage 128kB Memory for data and logbook Display 2,4“ TFT-Display (6,1 cm), Resolution 320×240 Pixel, 65 000 Colors, Angle of view 170° Connector Micro-USB 2.0 Interface for data download and battery recharging Sensor Intersema MS5541C Battery 18650 LiIon battery with protective circuit, nonstop usage > 40 hours Controls Two Piezo-electric switches, usable even with extra thick gloves Housing Housing made of ABS Display window made of scratch-resistant borosilicate glass Dimensions 80 mm x 68 mm x 34 mm about 260g Maximum diving depth 120m Allowed temperature range 0-40°C

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