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Section 2: Diving with the Monitor 3 Air

17

Dive Time

Dive time, which is displayed in minutes, is the amount
of time spent below a depth of 4 feet. While the dive time
is running, the colon to the right of the number flashes
in one-second intervals. Maximum dive time displayed is
199 minutes.

Note: If a dive lasts longer than 199 minutes, dive time will

roll over to 0 minutes.

Maximum depth
display

Maximum Depth

Maximum depth is the deepest depth reached during the
dive. It is only displayed when the actual depth is more
than three feet shallower than the maximum depth.

Dive time
display

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Содержание 2 Plus

Страница 1: ...Owner s Manual ...

Страница 2: ...any other source you are considered the second owner in which case the warranty is void This warranty only applies to non commercial use Warranty does not apply to commercial military or rental use The manufacturer will replace or repair any unit containing a manufacturing or materials defect if notified within 24 months from the date of purchase by the original owner It is the buyer s responsibil...

Страница 3: ...assume responsibility for those risks do not use the Monitor 3 Air The Monitor 3 Air is a sophisticated decompression tool to assist a trained and certified SCUBA diver in making decisions concerning dive planning and execution As with any tool the Monitor 3 Air may be misused if the following safety and operational precautions are not strictly followed If they are followed careful use of the Moni...

Страница 4: ... other diving computer or table can actually monitor the physical changes that occur in your body as you dive Each diver varies in his or her susceptibil ity to decompression sickness and that susceptibility may vary from day to day Decompression modeling is an inexact science it is based at least partly on certain unproven assumptions Therefore you must dive responsibly and to carefully follow al...

Страница 5: ... the computer fails ascend to surface no faster than 60 ft min 18 m min 12 You MUST be familiar with all signs and symptoms of DCS before using the Monitor 3 Air Seek IMMEDIATE treatment for decompression sickness should any of these signs or symptoms occur after a dive There is a direct correlation between effective treatment and the delay between the onset of symptoms and the treat ment for deco...

Страница 6: ...he Monitor 3 Air Without the Transmitter 12 Checking the Battery Power 12 Diving with the Monitor 3 Air 13 Preparation for the Dive 14 Functions During the Dive 16 Current Depth 16 Dive time 17 Maximum depth 17 Ascent Rate 18 No StopTime 19 Cylinder Pressure 20 Antenna Symbol 20 Graphic Air Time Remaining 21 Digital Air Time Remaining 21 High Air Consumption Warning 22 Decompression Stop Informati...

Страница 7: ...xiting Memory Mode 39 Pre Dive Planning Mode 41 Overview 42 Activation from Ready Mode 42 Activation from Surface Mode 44 Planning a Decompression Dive 46 Care Maintenance 49 Overview 50 Care Before the Dive 50 Care During the Dive 50 Care After the Dive 51 Annual Dealer Inspections Factory Service 51 Operating Temperature 52 Replacing the Battery 52 Reference 53 Technical Specifications 54 ZH L8 ...

Страница 8: ......

Страница 9: ...ins the technical specifications and a description of the algorithm What is a Dive Computer DEFINITION OF COMPARTMENTS A dive computer is an instrument that mathematically simulates the absorption and release of nitrogen by hypothetical tissue types in the human body These hypothetical tissues are commonly referred to as compart ments Each compartment absorbs and releases nitrogen at different rat...

Страница 10: ...l sensors attached to your body it doesn t know if you are tired dehydrated overweight or out of shape For this reason U S Divers recommends that you never push the no decompression limits of the computer Always leave a comfortable safety margin in respect to no decompression time air time and ascent speed Let the computer assist you in making your dive plan Do not let it control your dive WARNING...

Страница 11: ...shows total dive time total ascent time no stop time and while in decompression decompression stop time To the far right of the screen is the Air Zone The Air Zone shows current cylinder pressure a graphical representation of air time remaining and a digital readout of remaining air time In addition their are two warning icons one for interrupted transmission and the other for high breathing rate ...

Страница 12: ...Introduction 5 Monitor 3 Air display zones and contact letter designations ...

Страница 13: ...ency radio wave to the wrist unit One of the unique features of the transmitter is that it sends along a special code each time it transmits pressure information The computer listens to the code and if it is the correct code accepts the pressure information This feature allows more than one Monitor 3 Air system to be used without information becoming mixed up i e you reading your dive buddy s air ...

Страница 14: ...In this section Attaching the Transmitter to the Regulator Pairing the Wrist Unit with the Transmitter Using the Monitor 3 Air Without the Transmitter Checking battery power ...

Страница 15: ... dealer and have the O ring inspected and or replaced Then have the U S Divers dealer attach the transmitter to your regulator STEP 1 If your regulator is attached to a charged SCUBA cylinder turn the valve handle to the closed position and vent any air in the regulator by pressing the second stage purge button Remove the regulator from the cylinder If you currently have a gauge attached to your f...

Страница 16: ...be first paired Once paired they will continue to work together until such time the transmitter is introduced to another wrist unit When the transmitter sends a packet of data to the wrist unit it sends along a special code that only the paired wrist unit recognizes If the code is correct then the wrist unit accepts the data packet This way you will never get erroneous information from a nearby Mo...

Страница 17: ...the transmitter Turn on the cylinder valve Within six seconds the message PAIr will appear flashing in the upper tank pressure display STEP 3 STEP 4 Touch contacts A and D as soon as PAIr appears within 5 seconds The computer will confirm with a beep and PAIr will stop flashing ...

Страница 18: ...rst cylinder pressure reading will be displayed within 15 seconds STEP 5 If the procedure is not successful a FAIL message will appear If this happens close the cylinder valve purge all air from the regulator and repeat the procedure ...

Страница 19: ... the left side of the regulator Using the Monitor 3 Air Without the Transmitter If for any reason you are unable to use the transmitter you can still use the wrist unit as a dive computer It will provide all the normal information found in the MODE DEPTH and TIME zones However the influence of breath ing rate and work load will not be taken into account in the decompression calculations The AIR ZO...

Страница 20: ...In this section Preparation for the dive Functions during the dive Functions at the surface Summary of Messages and Alarms ...

Страница 21: ...ll not perform properly If you rely on the computer in this condition to plan your dive you risk serious injury or death Switch on the Monitor 3 Air by touching contacts A and D Check the display to make sure all the display elements are lit STEP 3 Open the cylinder valve The transmitter switches on automatically when it senses pressure STEP 4 Mount the regulator with transmitter attached onto the...

Страница 22: ... The cylinder pressure reading appears about 10 seconds after turning on the valve The Monitor 3 Air is now in Ready Mode The computer switches to Dive Mode after entering the water and submerging below four feet The depth indication may be delayed for a few seconds STEP 5 STEP 6 ...

Страница 23: ...h is two feet or less the depth display is replaced with three dashes Note Depth measurement is based on freshwater When diving is salt water the depth displayed will be slightly greater than the actual depth depending on the salinity of the water Functions During the Dive Current depth display at 100 feet Current depth display at 2 feet or shallower ...

Страница 24: ...e right of the number flashes in one second intervals Maximum dive time displayed is 199 minutes Note If a dive lasts longer than 199 minutes dive time will roll over to 0 minutes Maximum depth display Maximum Depth Maximum depth is the deepest depth reached during the dive It is only displayed when the actual depth is more than three feet shallower than the maximum depth Dive time display ...

Страница 25: ...ed at all times Exceeding the prescribed ascent rate can lead to microbubble formation which can lead to serious injury or death due to decompressionsickness If the ascent rate is 100 or more the arrow appears If the ascent rate exceeds 140 the arrow starts flashing Also an acoustic alarm sounds when ascent rate is 110 or greater The intensity of the alarm increases as the percentage over the allo...

Страница 26: ...pression time and total ascent time At shallow depth a slow ascent may shorten decompression time because the tissues are desaturating during a shallow slow ascent Excessive rates of longer periods are entered in the dive computer s memory No Stop Time No Stop Time is the amount of time you can stay at the current depth without making required decompression stops This number is displayed in minute...

Страница 27: ...uare inch psi in 1 psi increments Antenna Symbol If during the dive there is an interruption in the transmission of air data to the Monitor 3 Air for more than 30 seconds the antenna symbol will appear accompanied by an acoustic warning If sensible data is not received within 40 seconds after the antenna symbol appears the air pressure reading will be replaced by four dashes and all air time infor...

Страница 28: ... the 30 minute level you have between 30 and 45 minutes of air time Graphic Air Time Remaining Display Digital Air Time Remaining ATR Digital air time remaining gives you the amount of time displayed in minutes that you can stay at the current depth and still be able to carry out all required decompression stops Make a safe ascent to the surface at the permitted ascent rate Arrive at the surface w...

Страница 29: ... acoustic attention signal sounds at the ATR digits start to flash WARNING When the last minute has passed ATR 0 an acoustic alarm is activated every 4 seconds The digital ATR and graphical ATR start to flash Start your ascent immediately Note The acoustic alarm on exceeding the ATR is suppressed at depths less than 23 feet if the Monitor 3 is in a no decompression stop phase High Air Consumption ...

Страница 30: ...NG If you ascend shallower than the required decompression stop depth the DECO arrow will start flashing and an acoustic alarm will sound Due to the formation of microbubbles decompression obligation can increase greatly if a decompression stop is ignored When the surface is reached during the decompression alarm the DECO arrow continues to flash to point out the risk of a decompression accident I...

Страница 31: ...workload High workloads and different ascent rates may change the total ascent time Total Ascent Time Display SOS Mode If you ignore your decompression stop and return to the surface shallower than 4 feet for more than three minutes the Monitor 3 Air switches to SOS Mode In SOS Mode the computer displays SOS instead of current depth While in SOS Mode the computer cannot be used for 24 hours SOS Mo...

Страница 32: ... If you stay at the surface longer than 5 minutes the dive is entered into the logbook and the Monitor 3 Air switches into surface mode Surface Mode Note Surface mode will stay visible for 3 minutes After that the screen will go blank to save battery power To reacti vate the surface mode display touch contacts A and D Surface mode icon Five minutes after surfacing the Monitor 3 enters Surface Mode...

Страница 33: ...on ascent to altitude in a commercial jetliner altitude up to 8000 ft 2400 m 2 Divers who plan to make daily multiple dives for several days or make dives that require decompres sion stops should take special precautions and wait for an extended surface interval beyond 12 hours before flight Both the Undersea and Hyperbaric Medical Society UHMS and DAN agree that There can never be a flying after ...

Страница 34: ...akes to completely off gas any residual nitrogen in your system Desaturation time is displayed in hours and minutes Desaturation time display Surface Interval Time Surface interval time is shown immediately after accessing Memory Mode For more information on accessing Memory Mode see page 38 steps 1 and 2 ...

Страница 35: ... reduce the risk of decompression sickness If the Monitor 3 Air calculates that the forma tion of microbubbles may occur during the surface interval it will advise the diver to extend the surface interval The display Atn attention is visible in the depth display area during the surface mode While Atn is displayed the diver should not undertake another dive Note If a dive has to be made while Atn i...

Страница 36: ...ltitude sectors Atmospheric pressure is influenced by altitude and weather The Monitor 3 Air is interested only in the actual atmospheric pressure value for use in decompression calculations However it indicates the altitude sector which corresponds most closely with this pressure for normal weather conditions The altitude sectors and their corresponding altitude is illustrated below switches at a...

Страница 37: ...on even at higher altitudes the 10 foot decompression stop is divided into a 13 foot stop and 7 foot stop Therefore the pre scribed decompression stops in order are 7 ft 13 ft 20 ft 30 ft 80 ft Exceeding the Altitude Limit The Monitor 3 Air operates normally up to an altitude of 13 123 ft Above that atmospheric pressure below 8 99 psi the computer will not show any decompression information or rem...

Страница 38: ...s or flashing figures In addition two short beeps can be heard in intervals of 4 seconds in two different frequencies Attention messages appear in the following situations Altitude dive During a change to a higher altitude the Monitor 3 Air displays an altitude sector icon and the corresponding adapta tion time End of no stop time To avoid making a decompression dive a 0 flashes during the last mi...

Страница 39: ...l no longer be displayed High air consumption When there is a significant increase in the air consump tion the warning icon appears accompanied by two beeps Relax and breathe more slowly Microbubble warning Atn This message is displayed when the Monitor 3 Air calculates that there is an excess of microbubbles in your body tissues Do not dive while this message is displayed If you dive while the me...

Страница 40: ...supply may be insufficient to safely reach the surface Start your ascent immediately Alarms Alarms are communicated to you by symbols letters or flashing icons In addition an acoustic warning sounds during the duration of the alarm An alarm occurs in the following situations Missed decompression stop Descend to the prescribed decompression stop at once ...

Страница 41: ...ing Surface Mode or Ready Mode bAt flashes in the maximum depth position This indicates battery charge is nearing 0 Low transmitter battery While diving the bAt message alternates with the cylinder pressure display In Ready Mode or Surface Mode it flashes in place of the tank pressure This indicates battery charge is nearing 0 ...

Страница 42: ...In this section Activating Memory Mode Scrolling through logged dives ...

Страница 43: ...for each dive Downloading the Memory to a PC With the use of a separate interface kit the Monitor 3 Air has the ability to download the details of the last 37 dives to an IBM compatible computer In addition detailed informa tion on the last 200 minutes of diving sampled every 20 seconds allows the software to plot a graph depicting your actual dive profile and display the computer informa tion any...

Страница 44: ...Section 3 Memory Mode 37 ...

Страница 45: ...g from Surface Mode the current surface interval also appears STEP 2 Touch Contacts A D to confirm the selection After a few moments the information for the most recent logged dive appears Note If you are only checking surface time you can immediately return to Surface or Ready Mode by touching contacts A B instead of touching A D Surface interval time appears when activated from Surface Mode ...

Страница 46: ...ouch contacts A B Scroll back through logged dives Note The absence of a previous surface interval means that the logged dive was the first dive after a complete desaturation Exiting Memory Mode To exit Memory Mode touch contacts A D If there is no activity for three minutes while in Memory Mode the computer will automatically switch back to Surface or Ready Mode Scroll forward through logged dive...

Страница 47: ...Section 3 Memory Mode 40 ...

Страница 48: ...In this section Activation from Ready Mode Activation from Surface Mode Planning a Decompression Dive ...

Страница 49: ...sence of an on board recompression chamber should attempt to plan a decompression dive Those who attempt decompression dives must be willing to accept an increased risk of decompression sickness You can access the Pre Dive Plan Mode form either Ready Mode or Surface Mode When you access the planner from Surface Mode you have the option of adding surface interval time to plan for a dive at some poi...

Страница 50: ...n start scrolling through the available time depth combinations STEP 2 The Monitor scrolls from 50 to 200 feet in 10 foot increments For each depth the computer gives the maximum allowable no stop time at that depth STEP 3 Note If you want to stay longer than the no stop time limit proceed to Planning a Decompres sion Dive on page 46 ...

Страница 51: ... STEP 1 From Surface Mode touch contacts A B The computer will emit one beep and the Dive Plan Icon will appear in the mode zone STEP 2 Touch contacts A D to confirm the selection The words Add and Int appear along with a flashing surface interval time Surface Mode ...

Страница 52: ...ements for the first 6 hours 30 minute increments from 6 to 12 hours and 1 hour increments after that STEP 4 After adding the desired amount of surface interval time touch contacts A D The word run flashes for a few moments then the Monitor starts scrolling from 50 to 200 feet in 10 foot increments For each depth the com puter gives the maximum allowable no stop time at that depth Decrease Time No...

Страница 53: ...sired depth touch contacts A D The word Add appears in the depth zone the flashing dive time is now one minute more than the allowable no stop time and all decompression information is displayed including stop depth stop time and total ascent time Increase the dive time by touching contacts A C If you increase the dive time too much and want to reduce it touch contacts A B STEP 2 Decrease Time Inc...

Страница 54: ...ch contacts A D If you want to return to Surface Mode or Ready Mode touch contacts A D for about three seconds WARNING If two or more divers using computers are planning a dive planning for all divers must be based on the dive computer showing the shortest no stop times Failure to do this may lead to serious injury or death from decom pressionsickness STEP 4 Note If there is no activity during the...

Страница 55: ...Section 4 Pre Dive Planning Mode 48 ...

Страница 56: ......

Страница 57: ...e The Monitor 3 Air s plastic housing is made of a shock resistant resin This housing protects the Monitor 3 Air from the normal bumps that occur when diving However the computer cannot withstand the impact of heavy objects such as weight belts or SCUBA cylinders Impact from heavy objects is the most common cause of computer damage When you set up your dive gear on a boat or the beach keep the Mon...

Страница 58: ...puter from the bath rinse thoroughly with fresh water Towel dry the computer before final storage Place the Monitor 3 Air in a cool dry and protective case to transport The transmitter should be rinsed at the same time the regulator is rinsed Make sure the transmitter is attached to the first stage Connect the first stage to a charged SCUBA cylinder Turn on the cylinder valve and submerge the whol...

Страница 59: ...r trunk After the dive cover the computer and keep it out of the sun If inadvertently left in direct view of the sun the LCD may become totally black If this occurs immediately immerse the Monitor 3 Air in water The display should recover its normal appearance after a few minutes Damage from extreme heat or cold is not covered under the two year limited warranty Replacing the Battery The Monitor 3...

Страница 60: ......

Страница 61: ... transmission Transmitter Connection 7 16 UNF regulator HP port Dive Log Mode Stores last 37 dives in memory After 37 dives adds latest dive to memory deletes oldest dive 37 most recent dives are retained in memory Altitude range 0 13 200 feet above sea level Full computer functions up to 13 200 ft Battery LR07 long life lithium battery factory replaceable only No DecompressionModel ZH L8 ADT 8 ti...

Страница 62: ...anges in saturation the time that must be spent at the surface prior to flying can be considerably lengthened depending on the depth time and temperature of a dive as well as the diver s workload during that dive MicrobubbleFormation The ZH L8 ADT model considers nitrogen in both its dissolved and gaseous phase microbubbles Formation of microbubbles is considered to be a strong indicator of a high...

Страница 63: ...s will help prevent the formation of microbubbles in the arterial circulation and minimizes formation of microbubbles in the venous circulation after the dive Summary With its new decompression model the Monitor 3 Air is a versatile tool which can increase your diving comfort and safety As with any diving tool however ultimate responsi bility for diving safety remains with the individual diver The...

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