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Summary of Contents for heinrichs weikamp OSTC 4
- Page 1 Manual OSTC 5 OSTC 4 Firmware hwOS4 Dive computer OSTC 4 and OSTC 5 Open Source Tauch Computer...
- Page 2 Tip: Our free deco brochure with a simple explana- tions of gradient factors is available to download from our homepage:...
- Page 3 OSTC is always up to date. You can find the free download at: www.heinrichsweikamp.com Contact If you have any questions about your OSTC, please contact us • in our forum: https://forum.heinrichsweikamp.com • via E-Mail: info@heinrichsweikamp.com • via Post: heinrichs weikamp Adlerstraße 7 79098 Freiburg Germany...
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Page 4: Table Of Contents
Content 1. General information ................8 1.1. Technical state....................8 1.2. About this manual ..................8 1.3. Function overview ..................8 2. Safety instructions .................. 9 2.1. Prerequisites .....................9 2.2. Before every dive .....................9 2.3. During the dive .....................10 2.4. Safe use ......................10 2.5. - Page 5 4.2.2. SIM – Simulator ................18 Simulate a dive ..................18 Compute decoplan ................19 4.2.3 OC – Setting gases ................19 Setting the mix ..................19 Gas type ....................20 Change depth ..................20 Examples ....................20 4.2.4. DECO - Deco-Settings ..............21 Dive Mode .....................21 ppO2 max ....................21 Safety stop ....................21 Slow exit ....................21 Future TTS ....................21...
- Page 6 6.5. Updating the firmware ................34 7. Care and maintenance ................35 7.1. Housing ......................35 7.2 Strap ........................35 7.3. Accessories .....................35 7.4. Recharge the battery ..................35 7.5. Sacrificial anode (OSTC 5 only) ...............36 Technical data ................... 38 OSTC 4 .....................38 OSTC 5 .....................38 Disposal ....................39...
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Page 8: General Information
These operating instructions correspond to the technical status of the hwOS4 firmware Rights of use in February 2025. Copyright © heinrichs weikamp GmbH Firmware 1.6.9 Reproduction or further use of these in- Subject to technical changes. structions, even in part, is only permitted... -
Page 9: Safety Instructions
Stable firmware? Use the OSTC with firmware provided by 2.1. Prerequisites heinrichs weikamp that is labelled as ‘sta- ble’. This firmware has been tested and en- The first prerequisite for safe diving is suita- sures reliable operation of your dive com- ble, successfully completed diving training. -
Page 10: During The Dive
2.3. During the dive Keep the OSTC away from small children. Small parts such as the battery compart- Take a backup system with you. ment cover could be swallowed. Always carry a backup system with you on your dives so that you can monitor your Caution dive time and depth independently of your OSTC. -
Page 11: Before First Use
3. Before first use heinrichs weikamp delivers the OSTC in a ready-to-use condition. However, please check the charge status before using it for the first time. The OSTC is attached to the arm with bun- gees. The bungees are already attached. Ad-... -
Page 12: The States Of The Ostc
If the OSTC is in CCR or pSCR mode for re- Under water, it is not possible to switch breather diving, nine tabs appear in the from dive mode to surface mode and menu, which are divided into the following change the basic settings. -
Page 13: Surface Mode
4. Surface mode Depth gauge (Gauge) Here the OSTC is used as a depth gauge, dis- 4.1. Displays playing depth, maximum depth, dive time, temperature, time, battery status, compass and average depth. The decompression and In surface mode, the OSTC shows a number saturation calculation are switched off. -
Page 14: Settings Main Menu
4.2. Settings main menu Compass In the main menu, you can make settings Calibrate compass for the next dive, adjust the basic settings The OSTC has a tilt-compensated, digital of the OSTC and plan dives in advance. 3D compass with an inclination of up to ap- Open the main menu by pressing the right prox. -
Page 15: Brightness
Buttons Set bearing A bearing can also be saved on land in this menu. The course is displayed in digits with- You can set how sensitively the buttons in the menu. Press Enter to save the course. should react to the button press. The high- The bearing appears in green on the com- er the value, the more sensitive the buttons pass rose on the start page. -
Page 16: Date
Date Timer Set the calendar date and time. Enter the A universally usable countdown timer desired numbers using +/– and Enter. Se- that can be used, for example, as an aid lect a date format for the display: to ‘breathing on’ a CCR. To activate, select DDMMYY: Day, month, year the ‘Timer’... -
Page 17: Custom Views
Custom views ! Warning Only use the Reset deco and Reset RTE func- You can use this menu to customise the dis- tions if no repetitive dive is planned within plays for dive mode. the next 48 hours. In dive mode, the OSTC displays various custom views in the centre and in the field Reboot: at the bottom left, which can be switched... -
Page 18: Large Font
Large font 4.2.2. SIM – Simulator Here you can select whether a view with a large font can be selected in dive mode (op- You can use the simulator to calculate a de- tional or no) or whether dive mode starts compression plan for a specific maximum with a large font (start screen). -
Page 19: Compute Decoplan
During the simulation, you can select To start the calculation, select Calculate whether or not the simulation should fol- deco. When the calculation is complete, low the deco stops during the ascent. To do the TTS and the deco plan with the planned this, go to the menu with the right button deco stops are displayed. -
Page 20: Gas Type
Press Enter to select the line with the gas Note value. You can now increase or decrease the value for each number with – or +. Confirm The start gas is always used when descend- each number with Enter. ing. All gases (including deactivated gases) can be selected under water. -
Page 21: Deco - Deco-Settings
ond value (labelled ‘deco’) you can select a Note different value for the duration of the deco. The current gas list is displayed in the OC menu item in surface mode and in dive ! Warning mode via the menu (right button). In dive mode, you can see which gas matches the The hwOS4 firmware allows ppO2 limits current depth (dynamic gas list). -
Page 22: Salinity
Salinity pressure effects and attempts to keep their value below the critical radius. The decom- This setting allows you to set whether you pression plan is determined iteratively, with are diving in fresh water or salt water. This the estimated assumptions being recalcu- value has a slight effect on the depth and lated again and again to determine the maximum depth display. -
Page 23: Gf Low/High
GF low/high 4.2.5. Settings for the rebreather Settings for the GF values in the ZH-L16+GF In your OSTC, you can make all the settings calculation model. The first value shows required for diving with a rebreather. You the GF low, the second the GF high. The de- can either use fixed setpoints or sensor val- fault setting is a GF value of 30/85. -
Page 24: Sp - Fixed Setpoints
Deco: Gases used for decompression. mode. The current setpoint is always used for the deco calculation. Inactive: The diluent is deactivated and is The calculation in fixed SP mode always not included in the deco calculation. How- starts with SP1. It is also marked with an *. ever, it can still be selected under water. -
Page 25: Sensor
lation in the OSTC is then almost identical bling fail. A ‘Fallback’ message is displayed to the controller of the eCCR. The use of the in dive mode. You can switch back to use ZH-L16 GF calculation model is strongly rec- with sensors in the dive menu. -
Page 26: S8-Connection
Internal 100 kOhm load resistors are used scription of this interface can be found in for the analogue input of the O2 sensors in the source code at all heinrichs weikamp products. code.heinrichsweikamp.com/public/ The remaining four pins are intended for the connection of digital (solid-state) sen- sors. -
Page 27: O2 Sensors
O2 sensors Flush your system with the gas until the mV displays of the sensors no longer change. The measured values of the connected sen- Confirm with Calibrate. In surface mode, sors are displayed in the SYS menu under check whether the displayed ppO2 value is O2 sensors. - Page 28 A deactivated sensor appears in blue and is no longer taken into account when calcu- lating the average value. No more warnings are issued for it. You can set the maximum values for the ppO2 value under DECO -> ppO2. In the event that all sensors fail or are man- ually deactivated, a fallback occurs.
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Page 29: Dive Mode
5. Dive mode be toggled using the middle button (centre) and the left button (field). 5.1. Displays in dive mode In the default setting, the view that was last selected remains in the foreground. The OSTC displays the most important in- Under Variable displays in interface mode, formation permanently, and a lot of addi- you can set whether a view should return... -
Page 30: Display In Large Font
5.2. Menu operations in dive • CO2 content in the loop (ppm), when us- mode ing a solid state CO2 sensor In dive mode (OC), you can select the preset Display in large font gases, make changes to the decompression model and restart the calculation of the av- The large font display can be selected be- erage depth. -
Page 31: Better Gas - Quick Gas Change
Note Gases shown in red have a ppO2 that is too high for the current depth (can still be se- lected). Gases shown dimmed are deactivated. They can still be selected, but were not pre- viously included in the decompression cal- culation. -
Page 32: Data - Stopwatch And Compass
DATA – Stopwatch and compass decomodel is currently activated. If you want to change the model, tick the box next In the DATA menu, you can reset the stop- to the desired model. You can choose be- watch, take a compass bearing and set a tween VPM-B, Bühlmann with gradient fac- marker in the logbook. -
Page 33: Logbook And Software
6. Logbook and Software 6.1. Logbook Use the right button (next) to scroll through the list. To display further details on the highlighted dive, press Enter. The detailed view appears with a depth profile and addi- The OSTC has an extensive integrated log- tional information. -
Page 34: Software For The Ostc
6.5. Updating the firmware ating system. In Windows, it is the ‘Add de- vice’ option after clicking on the Bluetooth symbol in the toolbar. The hwOS4 firmware (device software) is subject to continuous further develop- Once the connection has been established, ment. -
Page 35: Care And Maintenance
The bungees can be replaced if necessary. or flashes green every second. Depending on the model of the OSTC 4, Switch on the OSTC and check the battery open the four screws on the back of the de- indicator on the display. -
Page 36: Sacrificial Anode (Ostc 5 Only)
10 years. Note For all OSTCs with rechargeable battery (OSTC 4 or OSTC 5), the OSTC must be fully Despite the sacrificial anode, the OSTC 5 charged after every reset/reboot, restart af- must also always be rinsed with fresh wa- ter an empty battery or insertion of a new ter after dives in salt water. -
Page 38: Technical Data
Weight 290 Gram Max. depth 200 Meter Scope of delivery OSTC 4 dive computer, firmware by heinrichs weikamp, charging pad (inductive charging), bungee, sturdy neoprene box, display protection film (already installed) OSTC 5 Display High-resolution widescreen display (AMOLED) with ambient light sen- sor, optically bonded, viewing angle: 160°, resolution: 800 x 480 pixels,... -
Page 39: Disposal
Please take the device to a suitable recycling facility at the end of its service life. You can also return it to heinrichs weikamp for proper disposal. - Page 40 GmbH Adlerstraße 7 79098 Freiburg im Breisgau Deutschland...
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