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3. Meridian as a dive computer

SCUBAPRO MERIDIAN

3. Meridian as a dive computer

3.3.9

Deactivating the water
contacts

Warning

If  you  chose  the  option  “Water  contacts
off”,  Meridian  will  turn  on  with  a  delay  of
up  to  1  minute  into  the  dive. This  will  affect
functioning of the dive computer.
Make  sure  the  Meridian  is  on  the  surface
mode before starting the dive.

By pressing SEL/ESC button on this menu
the on/off field at the bottom row starts
flashing. By pressing the +/UP or –/DOWN
button you may switch between active or
inactive water contacts. You may confirm
the selection by pressing SEL/ESC button
again.

F

NOTE: With inactive water contact

you prevent Meridian from switching
to dive ready mode when your skin or
surface moisture activates the water
contact.

3.4 APNEA Settings

APNEA diving related selections are
grouped in this menu.

By pressing the SEL/ESC button the
following menu’s can be accessed.

3.4.1

Setting the dual depth alarm

With this alarm you can set two
independent depth alarms. By pressing
the SEL/ESC button at this menu the first
depth starts flashing. By pressing the +/UP
or –/DOWN button you may select the first
depth alarm from 5 to 100 meters (20..330
feet). By pressing SEL/ESC the first value
is confirmed and the second alarm starts
flashing. Like the first, by pressing the +/UP
or –/DOWN button the second alarm may
be set from 5 to 100 meters.

First alarm depth

Second alarm depth

Status

F

NOTE: The first alarm is short

sequence for attention and the second
alarm is continuous. By setting the first
alarm deeper than the second, it will

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Содержание Meridian

Страница 1: ... Meridian ...

Страница 2: ...m does not calculate correctly Diving at oxygen partial pressures higher than 1 6 bar corresponding to a depth of 67m 220ft when breathing compressed air is extremely dangerous and could lead to serious injury or death Merdian dive instrument is a personal protective equipment in compliance with the essential safety requirements of the European Union directive 89 686 EEC RINA SpA Via Corsica 12 I ...

Страница 3: ...ings 23 3 2 1 Set Gas 1 23 3 2 2 Set Gas d 24 3 2 3 Nitrox reset time 24 3 2 4 Workload settings pulse limits 25 3 2 5 Desaturation reset 25 3 3 SCUBA settings 25 3 3 1 Maximum dive depth alarm 25 3 3 2 Maximum dive time alarm 26 3 3 3 Setting the Micro Bubble level 26 3 3 4 Setting the Safety stop timer 26 3 3 5 Setting the user preferred units 26 3 3 6 Selecting the salt ocean or fresh water 27 ...

Страница 4: ...l stops 41 3 11 5 L0 no stop time 2 minutes when diving an MB level 41 3 11 6 Entering deco when diving an MB level 41 3 11 7 Ascent rate 41 3 11 8 MOD ppO2 42 3 11 9 CNS O2 100 42 3 11 10 Missed decompression stop 43 3 11 11 Low battery 43 3 11 12 Setting bookmarks 43 3 11 13 Safety stop timer 43 3 11 14 Activating the backlight 44 3 11 15 Diving with MB levels 44 3 11 16 Display information 45 3...

Страница 5: ...5 English SCUBAPRO MERIDIAN 6 Taking care of Meridian 53 6 1 Technical information 53 6 2 Maintenance 53 6 3 Replacing the battery in Meridian 54 6 4 Warranty 55 7 Glossary 56 8 Index 58 ...

Страница 6: ...on information On the surface its size and good looks makes it an ideal everyday watch With features such as wake up alarm stop watch and altimeter Meridian can handle almost every task in your daily activities The buttons allow you to operate functions access menus and change settings while on the surface During the dive buttons set bookmarks show additional information on the dive computer scree...

Страница 7: ...Checking the battery status for details how to check your Meridian battery status WARNING Replacing the battery requires opening the electronic compartment of Meridian You must take extreme care when performing the battery change operation in order to ensure the water seal of the watch Failing to do so will cause Meridian to flood during your next dive and permanently damage the dive computer Dama...

Страница 8: ...section 3 Meridian as a dive computer 2 Meridian as a watch Meridian is more than just a watch It features a wake up alarm clock function a stopwatch with lap time and 99 hours run time an altimeter for tracking excursions to the mountains a thermometer F NOTE Considering that the metal housing is a good heat conductor the temperature reading will be warmer than reality when wearing Meridian direc...

Страница 9: ... Sound off CHECK battery state Unit ID SET alarm clock STOP watch STOP watch function SET time Planner Planner pages SET 12 24h mode LOG Logbook pages SET date DIVE mode UTC Altitude meter UP UP UP UP UP UP UP UP SEL UP UP UP UP SEL SEL SEL SEL Dive settings menus ...

Страница 10: ...f Meridian as a watch is the main time of day display This is the display in which the current time is shown in the middle row The upper display row shows the date For example the diagram below shows Saturday 23rd of November and the time is one second past 10 o clock 24h mode 12h mode ...

Страница 11: ...tings marked dark at the graphics below By pressing UP button you scroll to the next menu By pressing SEL ESC button you may edit the settings and values on that current menu TIME DATE SET Sound off CHECK battery state Unit ID SET alarm clock STOP watch SET time Planner SET 12 24h mode LOG SET date DIVE mode UTC Altitude meter UP UP UP UP UP UP UP UP SEL UP UP UP UP UP ...

Страница 12: ...ay or when the battery symbol is flashing in another display 2 1 2 Setting the UTC UTC setting will change the shown time compared to Greenwich 0 Meridian This feature is practical when travelling through different time zones By pressing SEL at UTC menu the hours will start to flash You may edit them with UP or DOWN buttons By pressing SEL the minutes will start to flash and you may edit them with...

Страница 13: ...y pressing the SEL ESC button the setting will be saved and move to the next digits Again by pressing the SEL ESC button the year digits after the dot will start flashing 2 1 6 Setting the sound to off silent mode By pressing the SEL ESC button the on setting will start flashing at the bottom of the display By pressing UP or DOWN buttons you may select on or off for the Meridian silent mode for al...

Страница 14: ...one change Flashing battery sym bol no dive symbol Completely used battery must change watch may reset at any time and remain off Diving mode not allowed only watch may be active 2 1 7 Checking the battery status Battery status The battery status menu displays how much energy is left in the CR2032 battery A brand new battery shows 5 dots Meridian is periodically measures the battery status and you...

Страница 15: ...mber is shown in this menu F NOTE The battery capacity and voltage at the end of the battery lifetime may vary depending on battery manufacturers Generally operation at low temperatures decreases the battery capacity Therefore when the battery indicator drops below 3 dots change the battery before making any dives Change the battery before the next dive ...

Страница 16: ...menus in Meridian The diagram below shows the sequence of the menus Note that when you first reach a menu you are outside of it You must SEL ESC button to enter the actual menu TIME DATE SET Sound off CHECK battery state Unit ID SET alarm clock STOP watch SET time Planner SET 12 24h mode LOG SET date DIVE mode UTC Altitude meter UP UP UP UP UP UP UP UP SEL UP UP UP UP ...

Страница 17: ... laps can be marked by pressing DOWN button when stopwatch is counting By doing so the display will freeze for 5 seconds and Meridian shows the lap time Counting will continue automatically and the lap counter will show the number of laps at the bottom of the screen By pressing SEL ESC button you can exit the stopwatch and return to the stopwatch menu F NOTE You can leave the stopwatch actively co...

Страница 18: ...mation 1 Selected oxygen concentration and active tanks 2 Selected water type 3 Selected microbubble level 4 Water temperature of the most recent dive 5 Altitude class 6 Status of saturation at the time the plan ner is started 7 A normal workload of the diver and observance of the prescribed ascent rates By pressing SEL ESC button at the planner menu you will get into the planner directly or to th...

Страница 19: ...n lead to death Be aware that exposures to high ppO2 will lead CNS clock value to exceed maximum recommended 100 If Gas 1 MOD is shallower than 9m 30feet planning is not allowed and information LO ppO2 is shown F NOTE The dive planner considers all programmed gas mixtures when computing no stop times or decompression schedules By pressing SEL ESC for planned depth the dive time appears at top row ...

Страница 20: ...in page has GA or AP instead of O2 at the bottom row By pressing SEL ESC you will select the dive and get to the sub display The information on the display varies depending on the mode of dive Scuba mode Minimum temperature dive start time and average heart rate if enabled APNEA mode The bottom row will show the maximum ascent rate GAUGE mode The bottom row will show the average depth 2 1 5 Dive s...

Страница 21: ...dive profiles with a 4second sampling rate While diving it displays depth dive time decompression status water temperature and much more On the surface after a dive it displays remaining desaturation time no fly time surface interval and prohibited Altitude Classes are shown in addition to the watch functions 3 1 Settings at the dive mode When Meridian is in surface mode you can access various men...

Страница 22: ... time UP SET HR limits UP Desaturation reset UP SET GAS Max Depth alarm UP UP UP UP Max Time alarm UP MB level UP Safety stop timer UP Units UP Salt water selection UP Back light duration time UP Attention beeps UP UP SET SCUBA Dual Depth alarm UP Depth Increment alarm UP Dive interval alarm UP Surface interval alarm UP Low HR alarm UP Ascent speed alarm UP Water density UP SET APNEA Water contact...

Страница 23: ...tton and scrolling with the UP or DOWN buttons you can access a loop of additional menus related to diving which are surface interval set gas set scuba set apnea and algorithm select 3 1 2 Surface interval counter After a dive the Meridian shows the surface interval from the latest dive The surface interval counter counts until desaturation is complete After the desaturation is complete this menu ...

Страница 24: ...e You may select the Gas d fraction and ppO2 combination so that the MOD is 3m 10ft deeper than with Gas 1 By pressing SEL ESC at this display the oxygen fraction starts to flash By pressing the UP or DOWN button you may scroll the value After accepting it by pressing the SEL ESC button the maximum partial pressure of oxygen ppO2 max value starts to flash By pressing UP or DOWN button the value ma...

Страница 25: ...t WARNING Resetting desaturation will effect calculations of the algorithm and this may lead to serious injury or death Do not reset desaturation without a solid purpose When Meridian is still counting down the desaturation some menu changes are not possible In case the user decides to reset the desaturation the safety code 313 must be entered This procedure secures unwanted resetting and the desa...

Страница 26: ...l By pressing SEL ESC button in this menu the Micro Bubble level starts to flash By pressing the UP or DOWN button you may select personal settings from L0 up to L5 L5 is the most conservative setting The selection is confirmed by pressing SEL ESC button Micro Bubble level F NOTE more about diving with the MB levels read chapter Diving with MB levels 3 3 4 Setting the Safety stop timer Meridian sa...

Страница 27: ...0 3m 34ft at fresh water By pressing SEL ESC button at this menu the on off field at the bottom row starts to flash You may scroll between these two settings and confirm by pressing SEL ESC button 3 3 7 Setting the Backlight on duration By pressing SEL ESC button on this menu the backlight duration field at bottom row starts flashing By pressing the UP or DOWN button you may scroll between user pr...

Страница 28: ...mode when your skin or surface moisture activates the water contact 3 4 APNEA Settings APNEA diving related selections are grouped in this menu By pressing the SEL ESC button the following menu s can be accessed 3 4 1 Setting the dual depth alarm With this alarm you can set two independent depth alarms By pressing the SEL ESC button at this menu the first depth starts flashing By pressing the UP o...

Страница 29: ...arts to flash By pressing you can select the interval from 15 seconds up to 10 minutes By pressing SEL ESC button the function starts to flash and you may select to enable or disable by choosing on off with the UP and DOWN button By pressing SEL ESC again the selection will be confirmed Dive time interval Status 3 4 4 Setting the surface interval warning You can set a time for recovery or start ti...

Страница 30: ...he value will be confirmed and the function starts flashing By pressing you may select if alarm will be active by setting on off By pressing SEL ESC the selection will be confirmed 3 4 7 Setting the water density At APNEA diving the exact depth is very important value For the most accurate reading you must select the correct density of the water Density depends on water temperature and salinity sa...

Страница 31: ...GAUGE and APNEA modes Pressing the SEL ESC button will confirm the selection Since the GAUGE and APNEA modes are not tracking the tissue saturation there is a 48h locking interval after the last dive in GAUGE or APNEA mode before change to a SCUBA mode is possible Meridian shown below has been dived in GAUGE mode and the NO CHANGE lock is still on for another 4 hours From the last SCUBA dive the c...

Страница 32: ...after long enter manual gas switch 3 6 1 Display information Upon immersion Meridian will automatically start to monitor the dive regardless of what state it was in prior to the immersion Details on the information displayed can be found in the next sections Thedivetimeisdisplayedinminutes Ifduring the dive you ascend to the surface the time spent on the surface will only be counted if you descend...

Страница 33: ...e Stops deeper than 27m 90ft and total ascent times longer than 99 minutes are shown as Decompression information at MB L0 if you are diving with an MB level different than MB L0 you can ask Meridian to show you the decompression information pertinent to the underlying MB L0 calculation For more information on MB levels please refer to chapter 3 11 15 Diving with MB levels 3 6 2 Display configurat...

Страница 34: ...op left corner Meridian will display two numbers the left number represents the current altitude whereas the right number represents the prohibited altitude the altitude which Meridian has computed to be incompatible with your current nitrogen saturation levels Altitude here is given in classes from 0 up to 4 Please read chapter 3 7 2 Altitude and the decompression algorithm for more details on th...

Страница 35: ...her conditions can make the pressure switch point occur at different levels WARNING At Altitude Class 4 Meridian functions in GAUGE mode only automatic switch from dive computer mode F NOTE You can check your current Altitude Class and elevation by activating the altitude meter Refer to chapter Checking the Altitude on how to do so F NOTE Meridian monitors the altitude automatically it monitors th...

Страница 36: ...3300ft no decompression calculation is carried out by Meridian automatic GAUGE mode In addition the dive planner is not available in this altitude class 3 8 No dive warning after a dive If Meridian detects a situation of increased risk due to the potential microbubble accumulation from previous dives or a CNS O2 level above 40 the NO DIVE symbol will appear on the display to advise you against per...

Страница 37: ...et the change between the modes GAUGE APNEA and SCUBA are possible immediately However since the GAUGE and APNEA modes are not tracking your tissue nitrogen loading it is recommended to keep the initial intervals between changes on modes WARNING Diving after having reset the desaturation is extremely dangerous and is very likely to cause serious injury or death Do not reset the desaturation unless...

Страница 38: ... higher than 0 5bar and decreases when the oxygen partial pressure is lower than 0 5bar Hence while on the surface breathing air you will always be decreasing the CNS O2 clock During the dive the depth at which 0 5bar is reached for various mixes is as follows Air 13m 43 ft 32 6m 20 ft 36 4m 13ft F NOTE the O2 concentration of Gas d can only be set to a value higher than the O2 concentration for G...

Страница 39: ...ashing on the display together with the value of the MOD You have 30 seconds to respond to this message otherwise Meridian will consider that Gas d will not be used and adapts the decompression schedule accordingly To confirm the gas switch press SEL ESC button F NOTE Start breathing from the tank with the new gas mixture before confirming a switch WARNING Always make sure you are switching to the...

Страница 40: ...ally dangerous situations via warnings and alarms You can only modify the warning and alarm settings via PC interface Warnings represent situations that require the diver s attention but ignoring them does not represent an immediate risk It is up to you to decide which ones you would like to be active and which ones not The available warnings are 3 11 1 CNS O2 75 Meridian tracks your oxygen uptake...

Страница 41: ...Entering deco when diving an MB level When diving with an MB level higher than L0 the underlying L0 information is not directly visible on the display though it is accessible as alternate information You can choose to have Meridian warn you when you are about to enter a decompression obligation while diving with an active MB level higher than L0 Meridian emits a sequence of audible beeps and the D...

Страница 42: ...extension of both decompression duration and total ascent time At shallow depth a slow ascent may shorten the decompression duration Excessive ascent rates for longer periods are entered in the logbook WARNING The ideal ascent rate must not be exceeded at any time since this could lead to microbubbles in the arterial circulation which could cause serious injury or death The alarm persists for as l...

Страница 43: ...ING Do not start a dive if the battery symbol is displayed flashing on the screen on the surface The dive computer may fail to function during the dive and this could lead to serious injury or death During the dive Meridian alerts you of precarious battery situations in two ways By displaying a steady battery symbol on the screen This means you can finish the dive but you should replace the batter...

Страница 44: ... with an enhanced SCUBAPRO algorithm named ZH L8 ADT MB to reduce the formation of these microbubbles This enhanced algorithm allows the user to choose a level of conservatism over and in addition to the worldwide proven safety record of the standard ZH L8 ADT algorithm There are five levels of added conservatism or MB levels from L1 to L5 with L5 being the most conservative and L1 being just a bi...

Страница 45: ... Display shows L3 level stop information In addition to the white STOP symbol also the black DECO symbol appears to indicate that also L0 is in decompression 3 11 16 Display information When diving with an MB level other than L0 Meridian still carries out all calculations relating to L0 in the background To understand the relation between set MB level and the underlying L0 calculation and how the ...

Страница 46: ...nored MB level reduced If a level stop is required and you ascend 1 5m 5ft or more above it Meridian will reduce your active MB level to the next one compatible with the current depth When this happens the new active MB level is permanently displayed on the screen It is no longer possible to finish the dive with the MB level set at the beginning of the dive When the level stop depth is the same as...

Страница 47: ...8 hours before diving using a decompression dive computer When on the surface in GAUGE mode Meridian will show neither the remaining desaturation time nor the CNS O2 value It will however display a surface interval up to 24 hours and a 48 hour no fly time This no fly time is also the time during which you cannot switch back to dive computer mode The GAUGE mode surface display after a dive shows th...

Страница 48: ...ined with water temperature that is 20 C Time of day Water temperature Alternative information can be selected in the following order 1 Max depth after 1m 3feet ascent detected 2 Temperature 3 Average depth 4 Current time of the clock at the middle row temperature on the bottom row ...

Страница 49: ...tch to APNEA mode if the dive computer is completely desaturated APNEA mode at surface after a dive shows the maximum depth and the dive duration 4 minutes 47 seconds in the example below at top row In the middle row the surface interval counter is counts 15 minutes and if no repetitive dive is done the Meridian turns to APNEA menu display On the bottom row the sequential number of APNEA dives on ...

Страница 50: ... completely sealed HR belts the battery cannot be changed We recommend having the battery change by authorized SCUBAPRO dealer for the HR belts with a battery cap Check the operation conditions and depth rating of the HR belt from the unit or its package 4 2 Nylon arm strap Divers using thick neoprene wetsuit or drysuit may prefer longer arm strap Meridian can be equipped with one piece 31cm 12inc...

Страница 51: ...In order to take advantage of any of these features you need to establish a communication between your PC and Meridian with a cradle To start the communication 1 Connect the cradle to your PC 2 Launch SCUBAPRO LogTRAK on your PC 3 Select the serial port where the cradle is connected Extras Options download Select the COM port that is used for Meridian cradle 4 Place the Meridian on the cradle 5 2 ...

Страница 52: ...By selecting Extras Computer settings you can enable disable warnings that cannot be changed at Meridian unit via menus Read chapter 3 11 Warnings and alarms about the possible selections that you can modify on your Meridian You may also change the shown units between metric imperial Select Extras Options measurement units ...

Страница 53: ...o years by an authorized SCUBAPRO dealer Aside from that Meridian is virtually maintenance free Meridian is manufactured from highest grades of stainless steel Salt water and substances dissolved in it may cause corrosion surface rust or build an organic film which may disturb the functions of the Meridian Therefore it is necessary to rinse it carefully with fresh water after each dive and change ...

Страница 54: ...e between dives without loss of information F NOTE After a dive Meridian stores tissue desaturation data once an hour while on the surface until it is completely desaturated If battery is changed while Meridian has remaining desaturation time the tissue data will not be lost but Meridian will reference the last stored data set As a consequence the data displayed on the surface screen after the bat...

Страница 55: ...nd tear exterior influences e g transport damage damage due to bumping and hitting influences of weather or other natural phenomena servicing repairs or the opening of the dive computer by anybody not authorized to do so by the manufacturer pressure tests which do not take place in water diving accidents improper placement of the battery cap For European Union markets the warranty of this product ...

Страница 56: ...h more than one breathing gas is used air and or Nitrox Nitrox A breathing mix made of oxygen and nitrogen with the oxygen concentration being 22 or higher In this manual air is considered as a particular type of Nitrox NO FLY Minimum amount of time the diver should wait before taking a plane No stop time This is the time that a diver can stay at the current depth and still make a direct ascent to...

Страница 57: ...OS mode The result of having completed a dive without respecting all mandatory decompression obligations Stopwatch A stopwatch for example to time certain legs of the dive Switch depth The depth at which the diver plans to switch to a higher oxygen concentration mix while using the multi gas option in the ZH L8 ADT MB PMG algorithm UTC Universal Time Coordinated refers to time zone changes when tr...

Страница 58: ...monitor 29 50 JavaTRAK 51 Logbook 19 51 Maintenance 53 MB levels 44 Microbubbles 44 56 MOD 23 42 56 Mountain lakes 34 35 No dive warning 36 Nitrox 24 37 56 Nitrox reset 24 No fly time 34 Oxygen concentration 37 Oxygen partial pressure 37 PC interface 51 PMG 38 56 ppO2max 56 Predictive Multi Gas see PMG Safety stop timer 26 43 SOS mode 37 57 Stopwatch 17 Surface interval 18 23 29 57 Technical infor...

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