heinrichs weikamp OSTC 4 User Manual
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heinrichs weikamp OSTC 4 User Manual

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  • Page 1 User manual Open Source Dive Computer...
  • Page 3 Contact For any questions relating to your OSTC 4, please contact us per ... • internet forum: forum.heinrichsweikamp.com • E-Mail: info@heinrichsweikamp.com • post: heinrichs weikamp Adlerstraße 7 79098 Freiburg im Breisgau Germany...
  • Page 4 The firmware hwOS4 supports you both the high display performance, the bat- at scubadiving and rebreather diving tery life of the OSTC 4 makes no conses- with extensive functions and options. sions: The OSTC 4 operates 40 hours in For trimix diving you can use up to five...
  • Page 5 Data like logbook information or updates You can use the OSTC 4 intuitively. But to can be easily transferred with Bluetooth. become familiar with its functions and Take also notice of the large supply of to use it in the best way, we recommend logbook programs and other software.

  • Page 6: Table Of Contents

    Content Common advices......... 8 Before first use ..........18 Technical status ........8 Handling ..........20 Standard settings ........8 Modes of operation ......25 About this manual ........ 9 Modes of diving ........27 Terms of use ..........9 Compass calibration ......28 Functions overview ......10 Surface mode ..........30 Safety advices ..........11 Displays in surface mode ....30...
  • Page 7 Readout the dive computer .....90 OC - Change gases ......74 Bluetooth ..........91 CC - Change diluents ......78 Software for the OSTC 4 ....92 SP - Change setpoints ......79 Updating the firmware .....92 DATA - Stopwatch and compass ..80 Technical data ..........94 DECO - Change deco model .....82...

  • Page 8: Common Advices

    Technical status Standard settings This manual corresponds to the techni- Unless noted differently, the information cal status of OSTC 4 and its firmware as in this manual refers to OSTC standard of March 2016. settings. OSTC 4, its firmware and the documen- tation are subject to technical changes without notice.

  • Page 9: About This Manual

    About this manual Terms of use ! Warning Copyright © heinrichs weikamp GmbH indicates a situation that carries a signi- Copying or reusing this manual or parts ficant risk or injury. of this manual is not allowed without the written permission of heinrichs Caution weikamp.

  • Page 10: Functions Overview

    Functions overview Additional informations (e.g. tilt-com- pensated compass, average depth, stop- Your new dive computer OSTC 4 assists watch, ppO2, CNS) you with the following functions: Planning Display Configure and check gas mixes as well as Diving depth and duration according...

  • Page 11: Safety Advices

    Do not use this dive computer, if you don’t know or understand the settings The most important factor for safe diving and displayed information of OSTC 4. is a competent and well trained diver. If necessary, you must be able to finish your dive safely without a dive computer.

  • Page 12: Before Every Dive

    Plan your dive necessary, adjust the settings according Set up a dive plan that ist independent to your dive plan and equipment. from OSTC 4 and take it with you when diving. Battery full? Check the battery status using the bat- Make sure, that your OSTC 4 is ready for tery indicator on the display.
  • Page 13 Make sure that your OSTC 4 can be fastened safely using either the bungees or a suitable alternative. Display messages? Check the signals of the OSTC 4. Do not dive if your dive computer displays a warning. Check the cause of the warning.

  • Page 14: While Diving

    While diving Take the OSTC 4 with you on every repeat dive – don’t lend it to anyone. Take a backup system with you A correct calculation of tissue saturation While diving, always carry a backup requires that your OSTC 4 is: system to measure duration and depth of your dive independently from OSTC 4.
  • Page 15 ! Warning Saturation data is lost when updating the OSTC 4 firmware or in the unlikely event of a failure. In these cases, do not dive any further until tissue saturation has returned to normal level.

  • Page 16: Safe Use

    Safe use Do not modify the hardware. Modifi- cations to the hardware of the OSTC 4 Caution can damage its proper function and can damage the watertightness of its housing. Surpassing the maximum water depth of 200 meter may cause malfunction or Only the bungee backplate and the cap permanent damage of the device.

  • Page 17: Environmental Conditions

    Environmental conditions Store the OSTC 4 in a cool, dry place. Per- missible temperature range for use and Note storage: between -5 °C and 40 °C Decompression calculations and depth display are always based on the actual surface pressure. So if you are diving in mountain lakes, no further settings are needed.

  • Page 18: Before First Use

    Before diving, you need to adjust some settings as described in this manual. Fa- miliarize yourself with the OSTC 4. It is recommended that you read this manual carefully.
  • Page 19 Wet connector system (optional): Connect up to three oxygen sensors using the hwHUD or the ppO2 monitor. The connection is based on a fibre optic cable that can be removed and connected also under water.

  • Page 20: Handling

    Handling Operate the OSTC 4 with the three sensor buttons on the lower side of the housing. Always you only have to push one button. The force required to push the buttons is independent to ambient pressure. To switch on the dive com- puter press the left button.
  • Page 21 Within the menu the buttons are always used in the same way: Left button (Back): go back/ – (decrease value) Middle button (Enter): confirm Right button (Next): go next/ + (increase value) Additionally the commands are written on the lower area of the display. Left button Middle button Right button...
  • Page 22 The menu is composed in tabs like you know from internet browser. One tab is always in the front. In the upper line you see the menu items, with the right button you can scroll the items. To enter one item press the middle button (Enter). Now you can scroll again through the items and select one with Enter.
  • Page 23 To decrease or increase a value choose the value with Enter (the line will change colour to grey) and press – (left) or + (right). Confirm with Enter and you can go to the next value. When all values are confirmed, the line turns back to black colour and you can go to the next item.
  • Page 24 When the OSTC 4 is in OC mode for scuba When the OSTC 4 is in CC mode for re- diving (already preset) the menu shows breather diving the menu shows eight six tabs that are grouped in the follow-...

  • Page 25: Modes Of Operation

    OSTC 4 and read recorded dive data. To wake up the OSTC 4, push the left button.
  • Page 26 It is not possible to switch from dive mode to surface mode underwater. You cannot change the base settings while diving. When the OSTC 4 isn’t operated at the surface, it switches first into surface mode and then into sleep mode to save battery.

  • Page 27: Modes Of Diving

    ZH-L16+GF and VPM-B. There you can (decompresssion calculation), if you also adjust the gradient factors for the want to use the OSTC 4 for scuba or re- Bühlmann model and the levels of con- breather diving. The chosen dive mode is servatism for the VPM-B.

  • Page 28: Compass Calibration

    Compass calibration The OSTC 4 has a tilt-compensated elec- tronic compass. Like all electronic com- passes it must be calibrated before use. The calibration compensates aberration that can be caused by the battery. For an exact heading, the calibration of the compass is absolutely necessary.
  • Page 29 60 seconds. After this while the Note calibration ends automatically. During the calibration routine the OSTC 4 shows the values for the x-, y- and z-axis. The order of the axis rotation is not im- portant. Keep OSTC 4 away from any metallic object during the calibration process (at least 50 centimeters).

  • Page 30: Surface Mode

    Surface mode Displays in surface mode In surface mode the OSTC 4 shows some displays permanently on the main display. Some custom views in the center can be switched.
  • Page 31 Permanent items Selectable items In surface mode the OSTC 4 shows the In the center of the display you can see following items permanently: extra information in the custom view. You can switch them with the middle • ambient pressure, clock, date button.

  • Page 32: Menu Functions

    Under OC you can configure presets for tings to prepare the next dive, adjust the five gases for scuba diving as well as base settings of OSTC 4 and review your five bailout gases for rebreather diving. dives in the logbook. Open the menu While diving these gases are available with the right button (Menu).
  • Page 33 Configure mix For every gas you can set the percentage of oxygen and helium. Go to OC, choose your gas and press Enter to get details or to change values. In the first line appears the gas and its MOD (maximum operating depth). The first value is always the oxygen, the second one the helium.
  • Page 34 Enter. Now you can decrease or increase the value with – or +. Confirm the value with Enter. To your orientation the OSTC 4 shows the calculated maximum depth (MOD) that results from your settings for ppO2 (partial pressure of oxygen).
  • Page 35 Inactive gases are shown dimmed. First: The first gas which is used when the dive starts. Only one gas can be The OSTC 4 always computes the tissue marked as first. If there is only one active load and the decompression scheme gas, it will be automatically first gas.
  • Page 36 The change of deco gases with config- Change depth ured change depth will be advised un- derwater. To set the operation depth for your deco gases, select Change depth. Now you Note can adjust the value with – or +. The chosen operation depth will turn red The first gas is used when starting the if the change depth is deeper than the...
  • Page 37 Examples Dive with two decompression gases and one travel/bottom gas: Additionally to Dive with only one gas: Configure one the first gas and the two decompression gas, for example gas 1 as first. Set up the gases, configure a fourth gas as travel. mix of your gas.
  • Page 38 Note In surface mode the actual gaslist is shown in the menu under OC, in dive mode it is shown in the menu (right button). In dive mode you can see which gas fits to the current depth (dynamic gaslist). Gases with a too high or too low ppO2 turn into red.

  • Page 39: Deco - Deco Settings

    DECO - Deco settings In the menu DECO you can set the dive The DECO menu has two tabs. mode of the OSTC 4 (OC or CCR) and con- figure all important settings for the de- compression calculation.
  • Page 40 Dive mode ppO2 max Under dive mode you can toggle between Settings for maximum and minimum open circuit (OC) or closed circuit (CC). value of oxygen partial pressure (ppO2). Choose ppO2 max with Enter. The first value is the ppO2 for the entire dive. With the second value which is signed as “deco”...
  • Page 41 Safety stop Future TTS You can adjust your safety stop: The The future TTS makes a deco forecast. It lapse of time ranges from 1 to 5 minutes shows you the total time to surface (TTS) and the depth from 3 to 6 meter. After if you stay on the actual depth for some a dive within the no deco limit (NDL) it more minutes.
  • Page 42 This value affects slightly the display of Decompression information in your actual depth and maximum depth. The OSTC 4 is based on absolute pressure default for salinity is 0 % (fresh water). and not on relative pressure. Therefore salinity does not effect this calculation.
  • Page 43 The de- decostop, the GF high does it with the compression plan is calculated itera- highest decostop. OSTC 4 is set up to a tiveley, that means the presumption is GF low of 30 percent and a GF high of 85 always calculated from new to get the percent (GF 30/85).
  • Page 44 is shown. Additionally the VPM-B model uses a Bühlmann safety. The VPM-B model generally starts deco ! Warning on deeper stops than the Bühlmann model, but the total time to surface (TTS) is very similar. Only change values for decompression calculation if you are aware of their meanings.
  • Page 45 GF low/high Settings for the levels of conservatism Settings for the GF values in the deco in the deco model VPM from 0 (progres- model ZH-L16+GF. The first value shows sive) to +5 (conservative). Common is the GF low, the second shows GF high. The setting +2, it is already preset.
  • Page 46 aGF low/high Settings for an alternative GF pair which can be switched while diving. The aGF Note low can be set from 10 to 99 %, the aGF high from 45 to 99 %. The preset GF 30/85 corresponds to a modern and safe algorithm.
  • Page 47 Last deco Setting for depth of last decompression stop. Choose here if the OSTC 4 shall cal- culate its last stop at 3, 4, 5 or 6 meter. Default is on 3 meter. If you have heavy waves, a deeper last decostop can be...

  • Page 48: Sys - System Settings

    SYS - System settings With SYS you can make device settings, The menu SYS is composed of two tabs. calibrate the compass and activate Blue- tooth.
  • Page 49 In most cases the default Eco is recom- Calibrate the digital compass. mended. Only if OSTC 4 is often used in Read more on page 28. low depths and bright sunlight, a higher setting is recommended.
  • Page 50 Button sensitivity Date You can adjust sensitivity of the buttons Menu to set time and date. Type in the and how strong you have to push them. numbers with +/– and push Enter to The higher the value, the more sensitive confirm.
  • Page 51 Language Note The OSTC 4 can be set up in four lan- guages: English, German, French and You can also set up time and date with Italian. Choose your language with the your personal computer. With the com- Enter button.
  • Page 52 (ft/°F) units. You can also choose a colour scheme for the dive In dive mode the OSTC 4 shows different mode. You can choose the schemes stan- custom views in the center and in the dard (white), red, green and blue (0 to 3).
  • Page 53 cally to your preferred view. Adjustable in If you do not want the views to return au- steps of 5 seconds from 0 to 60 seconds. tomatically, put the seconds on 0 (zero). With Center primary you can congifure With Extra big font you can switch on or which view in the center shall return off the possibility to switch to an extra auomatically.
  • Page 54 In the reset menu you can put the set- as serial number, number of total dives, tings of the OSTC 4 to its default values, an overview of all complete charge cycles reboot the dive computer and set up a and the lowest battery voltage, hours of logbook offset.
  • Page 55 Use +/– and Enter be prompted to confirm the action. For to enter the number ( for example 349 , the next dive the OSTC 4 starts decom- if you have already 349 dives). This value pression calculation from new, without will be increased automatically after any data of former tissue load.
  • Page 56 ! Warning of dives to be shown in the logbook, you have to set up the number via logbook Use Reboot RTE and Reset deco only, if offset. you don’t plan a repetitive dive within the next 48 hours. There is also the possibility of a cold start with a magnet reset.

  • Page 57: Sim - Simulator

    SIM - Simulator Use the simulator to simulate the dive mode of the OSTC 4 or to calculate the decoplan for your next dive. Using the simulator you can get familiar with your dive computer even before the first dive.
  • Page 58 Push repeatedly the right button. First logbook. Simulated dives don’t affect there appears the menu for the dive any settings of the OSTC 4. Of course mode (change gas etc.), then the adjust- there will be no influence on the tissue able values for the simulation.
  • Page 59 Note DATA. Now you can set a check mark at Ascent follows deco stops. The OSTC 4 stays 60 minutes in the sim- All other functions are similar to the ulation mode until it switches to sleep dive mode and are described there (from mode.
  • Page 60 Calculate decoplan When the calculation is finished, the display shows the decoplan with the As a planning aid, the OSTC 4 can calcu- planned decostops. Depth is displayed late decompression stops in advance to in meters (or feet), duration in minutes.

  • Page 61: Settings For The Ccr

    In the menu DECO under Dive mode you can switch from OC mode to CCR mode. When the OSTC 4 is in CCR mode, two more tabs appear in the main menu: CC (configure diluents) and SP (configure...
  • Page 62 Note points or sensor readings for the decom- pression calculation. You can switch between Fixed SP and Fixed Sp: The OSTC 4 will calculate the Sensor mode even while diving. decompression using up to five fixed set- points. Sensor: Using the optional hwHUD or the ppO2 Monitor, the OSTC 4 can monitor up to three O2 sensors.
  • Page 63 Manually you can choose another one. In the menu SYS under oxygen sen- sors the OSTC 4 shows ppO2 readings of each sensor attached with a hwHUD or a ppO2 monitor (via optical input). Each sensor can be activated or deactivated.
  • Page 64 CC - Diluent setup Every diluent can be one of the follow- ing types: First, Deco, Travel or Inactive. In the menu CC you can configure five Select the desired diluent and go to gas diluents (gas 6 to gas 10). The starting type.
  • Page 65 (MOD). The change depth can be configured only for deco gases, not for travel gases. In dive mode you can make a quick gas change (better diluent). Close to the con- figured change depth the OSTC 4 pro- poses the fitting gas.
  • Page 66 Each setpoint can be set between 0,5 bar and 1,6 bar, in 0,1 bar increments. You can also configure the change depth for each setpoint. But in dive mode OSTC 4 will not indicate the change depth. De- compression calculation uses always the actual setpoint.
  • Page 67 Bailout gases Configure your bailout gases in the menu OC. The setup is the same like the setup for diluent gase.

  • Page 68: Dive Mode

    Displays in dive mode Permanently shown items The OSTC 4 shows some items perma- In dive mode the OSTC 4 shows the nently, some of them can be switched in following items permanently on the the center and in the left field.
  • Page 69 • aGF (if activated) Selectable items • dive mode (OC or CCR) • battery status Additional informations (custom views) can be monitored in the center or in the left field of the display. You can scroll them with the middle button (center) and the left button (field).
  • Page 70 Custom views in the center: • Gaslist OC/Bailout gases CCR • O2 monitor (bar) and O2 voltage (mV) • Compass in CCR mode • Decoplan: shows all decostops with • Info (clock/EAD/END) time and depth. The next decostop • no view is shown permanently on the main display.
  • Page 71 Custom views in the left field • Water temperature in °C or °F • Average depth for the whole dive • ppO2 • Stopwatch and average depth since activating the stopwatch • Ceiling • Future TTS (@+xx): shows your deco in xx minutes at the same depth •...
  • Page 72 Warnings Warnings appear in red on the display. They appear for the following items: • low battery level • too high/too low oxygen content • decostop missed • too fast ascend (red bar beneath the depth, from a rate of ascend of more than 10 m/min.

  • Page 73: Menu Functions In Dive Mode

    The pre-menu Menu? avoids that you push the button by accident. Confirm In dive mode (OC) you can select your within five seconds or the OSTC 4 returns preset gases, change your deco model to normal display. and reset the calculation of the average depth.

  • Page 74: Oc - Change Gases

    OC - Change gases In the menu OC you see a list of all OC gases (or bailout gases for CCR diving) that you have prepared in surface mode and also all inactive gases. To enter the gaslist push Enter. Select the gas you want to use and confirm with Enter.
  • Page 75 They can be selected by the user anyway. Dimmed gases are inactive. They can be selected by the user anyway, but they have not been part of the decompres- sion claculation. If they are activated the OSTC 4 calculates the deco from new.
  • Page 76 If you loose a gas or forgot to configure a gas, you can catch this up while diving. Got to Lost Gas and Extra Gas and select the item with Enter. Now you see your gaslist from new. To remove a gas from the list, remove the check mark with Enter.
  • Page 77 Better gas – quick gas change Push the right button and the dive com- puter proposes you the fitting gas (e.g. The actually used gas turns into yellow, NX50?) So you see at once which gas you when you get close to the configured shall use without entering the menu.

  • Page 78: Cc - Change Diluents

    CC - Change diluents Diving in CCR mode you can select the diluent gases that have been configured in surface mode in the menu CC. Select the gas and confirm with Enter. Also for diluent gases there is the possi- bility to remove lost gases and configure a extra gas while diving (see page 76).

  • Page 79: Sp - Change Setpoints

    SP - Change setpoints In the menu SP you can choose between the five setpoints that have been con- figured in surface mode. Select the set- point and confirm with Enter. If O2 sensors are connected via the hwHUD or the ppO2 monitor, the sensor readings can be used for the decompres- sion calculation too.

  • Page 80: Data - Stopwatch And Compass

    DATA - Stopwatch and compass In the menu DATA you can reset the stopwatch and take a bearing with the compass. In dive mode the stopwatch is diplayed in the custom view in the left field. The stopwatch starts with the beginning of the dive and can be reset in the menu DATA.
  • Page 81 To take a bearing with the compass go to Compass heading and confirm with Enter. The heading appears in numbers. Take your bearing and store the compass course with Set. The chosen course is marked green in the compass rose in the middle of the display.

  • Page 82: Deco - Change Deco Model

    DECO - Change deco model The OSTC 4 calculates all models simul- taneously in real time, so it can provide In the menu DECO you can change the the new model at once with all deco- deco model while diving or select an al- stops.
  • Page 83 Note After diving the OSTC 4 shows a count- down of five minutes. When you descend again within this period, the whole time of diving will be saved in the logbook as only one dive.

  • Page 84: Maintenance And Care

    Maintenance and care Housing Bungee Wash your OSTC 4 after every dive with The OSTC 4 is delivered with bungees. fresh water, especially after diving in The bungee wristband can be set to your seawater. If the housing is very dirty, put arm diameter individually.

  • Page 85: Accessories

    Only use the screws supplied with the battery compartement are available in OSTC 4 (M3x5). They are non-corrosive. the online shop of heinrichs weikamp (shop.heinrichsweikamp.com) or at your dealer.

  • Page 86: Recharge The Battery

    Charging the battery should cover the letters OS on the back- plate. As soon as it is charging the pad The OSTC 4 has a high-capacity recharge- stops flashing and is illumninated per- able battery. In eco mode it offers up to manently in green.
  • Page 87 leads to a warming of the dive computer. This is normal and harmless. If the tem- perature gets too high the charging stops automatically and starts from new after cooling down. Note When the battery is completel empty the information for saturation and no fly time as well as time and date get lost.

  • Page 88: Readout The Dive Computer

    Readout the dive computer Logbook The OSTC 4 includes a very comprehen- sive logbook that stores all important information for every dive and offers various profile views. Open the logbook directly from the start screen with the left button. Logbook entries are sorted in chronologi cal order, starting with the most recent entry.
  • Page 89 Scroll through the list with the right button (next). To see details of the selec- ted dive, press Enter. The dive profile and details page show up. To see more pro- files go on with the right button (next). At first there is a profile with depth and temperature, then a profile with the used gases and then a profile that shows the ppO2 value during your dive.

  • Page 90: Readout The Dive Computer

    Readout the dive computer You can connect your OSTC 4 easily via Bluetooth to your personal computer, notebook or smartphone. So you can upload software and download your logbook. All you need is a Bluetooth capable computer. The OSTC 4 works with Bluetooth Smart Ready, depending on the receiver it activates Bluetooth 2.0...

  • Page 91: Bluetooth

    Aktivate the Bluetooth interface in the the PC software communicates with menu SYS. Go to Bluetooth and confirm the OSTC 4. You don’t need any special with Enter. After a short while the blue- drivers. tooth is active and you can connect your...

  • Page 92: Software For The Ostc 4

    The applica- ment. To make the best of your OSTC 4, tions provide easy-to-operate functions use the latest stable firmware that is for transferring recorded dive data, and...
  • Page 93 After the update the dive computer turns off and We recommend you to upgrade the firm- starts from new. ware regularly – at least ones a year. Of course, updates for the OSTC 4 are free of charge.

  • Page 94: Technical Data

    Aluminium, milled from a single block and hard-anodized, impact-proof glass panel Size 87 mm x 86 mm x 23 mm Weight 290 gr Operating depth 200 meter Scope of delivery OSTC 4 dive computer, firmware by heinrichs weikamp, charging pad (inductive charging), bungee, stable neoprene box, screen protector(already installed)

  • Page 95: Disposal

    Disposal According to the European WEEE direc- tive, electrical and electronic devices must not be disposed with consumer waste. It’s components must be recycled or disposed apart from each other. Other wise contaminative and hazardous substances can pollute our environment. You as the consumer are committed by law to dispose electrical and electron- ic devices to the producer, the dealer or...

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