A&D 2 Plus User's Manual
Contents
1. 14 F to 122 F increments DAS SES NE PE TE High contrast custom liquid crystal with back luminescence Data Transmission Long wave radio transmission Transmitter Connection 7 16 UNF regulator HP port Dive Log Mode sisi 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 e s ssseseeeo 0 13 200 feet above sea level Full computer functions up to 13 200 ft BACCO Vo EERE SEE LRO7 long life lithium battery factory replaceable only 54 moniworSair Section 6 Reference ZH L8 ADT Calculation Model The Monitor 3 Air uses a new calculation model known as the ZH L8 ADT This model uses eight compartments or tissue groups with half times ranging from 5 to 640 minutes This calculation model is based on the most current research conducted by the late Dr A A Buhlmann Most computer decompression models only take into account time and depth the Monitor 3 Air model also factors in other physiological factors including tempera ture breathing rate and workload Workload and Temperature Blood perfusion to the body s organs is not constant Skin and muscle tissues are especially subject to changes in blood perfusion depending on temperature and workload Changes in blood perfusion to these organs change their nitrogen saturation tolerance The ZH L8 ADT model takes these effects into account and2. U S DIVERS AOUA LUIMG encre HOSELESS DIVE COMPU Owner s Manual Copyright Notice This owner s manual is copyrighted all rights reserved It may not in whole or in part be copied photocopied reproduced translated or reduced to any electron medium or machine readable form without prior consent in writing from U S Divers Co Inc 1995 U S Divers Co Inc Monitor 3 Air Owner s Manual Part Number 7454 95 Trademark Notice U S Divers and Aqua Lung are registered tradmarks of U S Divers Co Inc Warranty U S Divers Co Inc guarantees the Monitor 3 Air under the U S Divers 30 Day Satisifaction Guarantee and makes available the Two year Warranty 30 Day Satisfaction Guarantee If you are not completely satisfied with the performance of this product for the first 30 days after purchase return it to your U S Divers Pro Line Dealer for an exchange of equal U S Divers Co computer products It does require a proof of purchase receipt to be returned with the product Two Year Limited Warranty After receipt of a completed warranty card U S Divers will extend a two year limited warranty U S Divers Co Inc warrants this product to be free of material defects and or craftsmanship under normal recreational SCUBA use non commercial or non military use and with annual maintenance described within this manual Should the Monitor 3 Air prove to be defective it will be repaired or replaced at U S Divers discretion free o
3. 9 Using the Monitor 3 Air Without the Transmitter 12 Checking the Battery Power 12 Diving with the Monitor 3 Air 13 Preparation for the Dive ccccssscecseeeeseeeeeseeees 14 Functions During the Dive ccccsessesseeeeeeeeees 16 CUrFENE DE DIN inner nues antennes 16 DVE TING sees nent nn ne nt nantes ste 17 Maxim depenen 17 ASCENLRAIG aoaia EN ES 18 NO SIOD TIME esie a VE 19 INGEE PrESS UTE sn nine nimes 20 Antenna Symboles aa minou 20 Graphic Air Time Remaining cseseecseeeeeeeeeeeeeeeeseeeeees 21 Digital Air Time Remaining ssssssssesssssssnssnnnsrnrrrrrrrrrrrrrrrrrrrnn 21 High Air Consumption Warning 22 Decompression Stop Information 23 TOLALASCONL TIMES de een Ne 24 SOS MOTE raa trie ete er eee ner eet pen artnet were one 24 Functions at the Surface cccceeccecseeeseeeeeeeaeeees 25 Upon SUN een 25 Surrace MOd 53 tn ntm eae eR 25 SUMMACE Mode ICON asearen anea AA 25 Wait to fly TIME ea en E E Ei 26 Desaturation TIME sessions 27 Surface Interval Time asera 27 Microbubble Warning sesccceceeeeeeeeeeeeeeeesesnneneeeeeeees 28 DIViING vaWVAIMIUG stn iets eee ett 29 Altitude Secors manne eek dic sente one ait 29 Exceeding the Altitude Limit cccccccccccceeeeeeeeeeeeeeeeeeeeeeeess 30 Summary of Attention Messages and Alarms 31 Attention Messages cccccccsssssssseeeeeeeeese
4. The buyer shall not subject the unit to dry pressure testing Any such testing must be carried out with the unit submersed in water Repair under warranty will not apply to any unit which has been subjected to sever shock or abuse and not maintained in accordance with the care instructions Disclaimer of Liability U S Divers Co its distributors and retailers MAKE NO WARRANTIES either expressed or implied with respect to the Monitor 3 Air the programs contained therein or this instruction manual except for those stated in the preceding paragraph IT IS EXPRESSLY UNDERSTOOD that by buying or using the Monitor 3 Air the owner or any other person who uses it accepts it AS IS with the entire risk as to its quality performance merchantability or fitness for any particular purpose being with the buyer or user This excludes replacement of defective parts to the original owner in the first two years after purchase under the conditions set forth in the preceding limited warranty section BY PURCHASING THE MONITOR 3 AIR IT IS AGREED AND UNDERSTOOD THAT IN NO EVENT WILL U S DIVERS CO ITS DISTRIBUTORS OR RETAILERS BE HELD LIABLE FOR ANY PERSONAL INJURIES FROM ITS OPERATION OR FOR ANY OTHER DAMAGES WHETHER DIRECT INDIRECT INCIDENTAL OR CONSEQUENTIAL EVEN IF U S DIVERS HAS BEEN ADVISED OF SUCH DAMAGES Some states do not allow the exclusion or limitation of implied warranties or liabilities for incidental damages so the above limitation
5. ascent speed Let the computer assist you in making your dive plan Do not let it control your dive however must accept that there is no device or procedure which will totally prevent the possibility of a decompression accident WARNING Using the Monitor 3 Air will not prevent the possibility of decompression sickness but using it sensibly reduces this risk Any sport diver moniworsair 3 Features of the Monitor 3 Air The Monitor 3 Air is made up of two compact units the computer display unit which is usually worn on the wrist and the high pressure HP transmitter which is screwed into the regulator first stage HP port THE COMPUTER SCREEN The Monitor 3 Air has a large liquid crystal display LCD and features large numbers and graphics The screen is luminous for easy reading during low light dives including night dives and cave dives The screen is organized into four zones see figure on opposite page The MODE zone DEPTH zone TIME zone and AIR zone The Mode Zone has five icons which indicate altitude low battery Pre dive Planning Mode Memory Mode and Surface Mode Next to the Mode Zone is the Depth Zone This grouping of numbers includes the current depth maximum depth decompression stop depth and ascent rate information Beside the Depth Zone is the Time Zone The Time Zone shows total dive time total ascent time no stop time and while in decompression decompression stop time To the f
6. DIVERS 20 moniworsair Cylinder Pressure Cylinder pressure is displayed in pounds per square inch psi in 1 psi increments U S DIVERS 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 informa tion will disappear The most likely cause of transmission interruption is the position of the computer in relation to the transmitter As soon as data is transmit ted again the computer will display the cylinder pressure and air time information DIVERS Section 2 Diving with the Monitor 3 Air Graphic Air Time Remaining ATR The graphic air time remaining box gives you at a quick glance the amount of air you have left As your air time lowers the box empties For example if the box is filled up to the 45 minute level you have between 45 and 60 minutes of air time remaining if the box is filled to the 30 minute level you have between 30 and 45 minutes of air time Graphic Air Time Remaining Display U S DIVERS 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
7. and transmitter moniwrSair 51 Section 5 Care amp Maintenance Operating Temperature The Monitor 3 Air operates normally between 12 F to 122 F 10 C to 50 C You may notice the liquid crystal display LCD becoming sluggish at extremely low temperatures This is normal and will not affect the computer s accuracy It is possible to damage the electronics if left exposed to direct sunlight or in a hot confined space like a car 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 Air s battery is not user replaceable It must be returned to the factory for replacement Factory service was discontinued in 1997 Please contact the original manufacturer Uwatec at 800 467 2822 52 montre air Section 6 REFERENCE Section 6 Reference Technical Specifications Operational Performance No Decompression Model Depth Rangt sis 0 330 feet e ZH L8 ADT Time Measurement 0 199 min Quartz timing e 8 tissue compartments 5 to 640 minutes Air Pressure Range 3625 psi e Decompression stop depths at 10 to 80 feet in 10 foot Temperature Range
8. 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 46 monte fair RDA Increase the dive time by touching contacts amp C If you increase the dive time too much and want to reduce it touch contacts A amp B Add 30 Section 4 Pre Dive Planning Mode STE When you reach the desired dive time release To return to the pre dive scrolling touch the contacts and after a few moments the contacts A amp D If you want to return to Surface Monitor 3 Air will display the new decompres Mode or Ready Mode touch contacts A amp D for Sion information You can then as shown in about three seconds step 2 increase and decrease the dive time as you wish 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 pression sickness WARNING If two or more divers using CHIRADIIUE TE Note If there is no activity during the Pre Dive Planning Mode for three minutes the Monitor 3 Air automatically returns to Surface Mode or Ready Mode moniwarSair 47 Section 4 Pre Dive Planning Mode 48 montre air Section 45 CARE amp MAINTEN Section 5 Care amp Maintenance Overview The Monitor 3 Air is a r
9. reach the surface Start your ascent immediately Missed decompression stop Descend to the prescribed decompression stop at once mg 99 moni Sair 33 Section 2 Diving with the Monitor 3 Air Low computer battery While diving bAt alternates with the maximum depth display During Surface Mode or Ready Mode bAt flashes in the maximum depth position This indicates battery charge is nearing 0 E L J E n 17 w eo lt T 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 34 montre air Section 3 MEMORY MODE In this section Activating Memory Mode Scrolling through logged dives Section 3 Memory Mode Overview Downloading the Memory to a PC The Monitor 3 Air wrist unit is able to display the details of With the use of a separate interface kit the Monitor 3 Air the last 19 dives Any dive that lasts two minutes or longer has the ability to download the details of the last 37 dives to is entered into memory After the memory is filled with all an IBM compatible computer In addition detailed informa 19 dives the oldest dive is deleted for each new dive tion on the last 200 entered All the dive information stays in memory until the minutes of diving The illustration on the opposite page shows
10. 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 with at least 580 psi remaining in your cylinder Note The ending psi level can be altered with the PC interface kit Digital Air Time Remaining Display U S DIN montwarSair 21 Section 2 Diving with the Monitor 3 Air WARNING Never allow the ATR to go below three minutes If the ATR goes below three minutes there is a danger of insufficient air supply for the ascent as well as an increased risk of decompression sickness and serious injury or death may result WARNING Correct calculation of ATR when using a reserve or J type valve is possible only if the reserve lever of the valve is in the open down position during the dive p WARNING If the ATR drops below three minutes an acoustic attention signal sounds at the ATR digits start to flash gt 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 gt 2 monte fair NO 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 Warning The high air consumption warning appears when you Significantly increase your breathing r
11. which corresponds most closely with this pressure for normal weather conditions The altitude sectors and their corresponding altitude is illustrated below switches at approx 8 85 psi switches at approx 10 51 psi switches at approx 11 81 psi switches at approx 13 12 psi moniwr7Sair 29 Section 2 Diving with the Monitor 3 Air Even the smallest differences in the pressure sensors can cause two computers at the same altitude to display different altitude sectors Notice how the altitude sectors overlap in the illustration These differences are not meaningful and do not interfere with the operation of the computer However if there is an altitude indication while at sea level or two computers differ by 2 altitude sectors contact your U S Divers dealer for service Note In order to assure optimal decompression 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 remaining air time Also Pre Dive Planning Mode cannot be started since decompression information is not available If the altitude limit is exceeded the Monitor 3 Air will display HI along wit
12. 8 mooniworSair Section 3 Memory Mode Scrolling through Logged Dives Note The absence of a previous surface interval means that To scroll back through the memory towards the oldest the logged dive was the first dive after a complete dive touch contacts A amp C To scroll forward through the desaturation memory towards the most recent dive touch contacts A amp B Exiting Memory Mode Scroll back through To exit Memory Mode touch contacts A amp D If there is no activity for three minutes while in Memory Mode the computer will automatically switch back to Surface or Ready Mode logged dives Scroll forward through logged dives mmoniwarSair 39 Section 3 Memory Mode 40 montre air Section 4 PRE DIVE PLANNING In this section Activation from Ready Mode Activation from Surface Mode Planning a Decompression Dive Section 4 Pre Dive Planning Mode Overview The Monitor 3 Air has a built in dive planner that allows you to plan both no stop dives and decompression dives The planner takes into account the temperature of the most recent dive and altitude WARNING Planned decompression dives violate the responsible diving practice standards of every major diving organization Recreational or sport scuba divers should not attempt decompression dives Only professional divers with extensive experience training and the appropriate equipment for decom pression diving in
13. The transmitter has 7 16 threads On some early model first stages the HP port is only 3 8 If this is the case with your regulator you need to get a 7 16 female to 3 8 male HP adapter U S Divers part number 1017 85 from your U S Divers dealer 8 monte fSair Thread the transmitter into the HP port of the first stage until finger tight Using a 3 4 open end wrench tighten the hose fitting until snug DO NOT overtighten Attach the first stage to a charged SCUBA cylinder Slowly turn the cylinder valve on off handwheel counterclockwise until the valve is completely open Submerge the first stage in water and check for any leaks If you detect leaks take your regulator and transmitter to your U S Divers dealer and have the O ring inspected and or replaced Then have the U S Divers dealer attach the transmitter to your regulator Section 1 Preparation SRE it your regulator to a charged SCUBA cylinder CAUTION DO NOT use the transmitter as a carrying DO NOT open the valve yet A handle Doing so may damage the transmitter requiring its replacement If the first stage is attached to a cylinder make sure to secure the cylinder so it doesn t fall over and damage the transmitter or regulator A transmitter damaged due to user neglect is not covered under the warranty STD Activate the Monitor 3 Air by touching contacts A amp D Pairing the Wrist Unit to the Transmitter For a transmitter and a wri
14. all the informa Be Cones awe Te tion that is logged for each dive software to plot a graph depicting your actual dive profile and display the computer informa tion anywhere along the profile battery is removed sampled every 20 Eee ai E US ite The interface kit and software available from your Authorized U S Divers dealer Note The procedures for downloading data to a personal computer are described in the manual that comes with the interface kit 36 montre air Section 3 Memory Mode Maximum depth reached during dive Dive number Lu Memory Mode Icon gt ming Fast ascent made during the dive pph s L Dive had a Surface dP differenti required Interval pressure decompression before stop the dive moniwr7Sair 37 Section 3 Memory Mode Activation seam Touch Contacts A amp D to confirm the selection After a few moments the information for the STEP 1 From Ready Mode Surface Mode touch most recent logged dive appears contacts A amp C The computer will emit one beep and the Memory Mode icon will appear in the mode zone If activating from Surface Mode the current surface interval also appears Note If you are only checking surface time you can immediately return to Surface or Ready Mode by touching contacts A amp B instead of touching A amp D Surface interval time appears when activated from Surface Mode e U S DIVERS 3
15. ar right of the screen is the Air Zone The Air Zone shows current cylinder pressure a graphical representation 4 monte fair 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 THE ELECTRICAL CONTACTS All surface operations and mode changes are made by the use of four electrical contacts placed around the Monitor 3 Air s screen These contacts are identified as A B C and D see figure on opposite page As a rule contact A is always touched in conjunction with one of the other three con tacts After entering different modes such as Memory Mode or Pre Dive Planning Mode contact B always decreases a value and contact C always increases a value always in combination with A To make contact simply moisten your fingertips and touch the appropriate pair of contacts at the same time Release the contact as soon as the operation has been activated usually no more than one second Introduction MODE DEPTH TIME AIR ZONE ZONE ZONE ZONE Monitor 3 Air display zones and contact letter designations neon Lair 5 THE TRANSMITTER The compact transmitter module screws into a standard Tae HP port The transmitter automatically activates when it senses pressure from the cylinder Once activated it sends pressure information via a low frequency radio wave to the wrist unit One of the unique fe
16. ate This could be the result of sudden physical effort emergency situation or significant leak in the air supply When this symbol appears reduce exertion and breathe more slowly m 4 secs e High Air Consumption Warning U S DIVERS Section 2 Diving with the Monitor 3 Air Decompression Stop Information If you exceed the no stop limits the Monitor 3 will replace the no stop time with the deepest first decom pression stop depth in feet along with the amount of decompression time in minutes at that depth When a decompression stop has been completed the next shallower decompression stop is displayed along with its required stop time When all decompression stops are completed the DECO arrow disappears and the NO STOP arrow reappears WARNING 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 adecompression accident If you do not descend immediately to the required stop depth the Monitor 3 will enter SOS Mode Any decom pression violation longer than one minute is entered in the computers logbook Ignoring decompression stops may lead to serious injury or death due
17. atures 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 information 6 moniter fair The Transmitter Section PREPARATION 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 Section 1 Preparation Attaching the Transmitter to Your Regulator Upon purchasing the Monitor 3 Air have your Authorized U S Divers Dealer attach the transmitter to your first stage regulator If this is not possible follow the simple steps listed below to do it yourself SRE lf 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 first stage regulator remove it using the appropriate sized wrench otherwise remove the high pressure HP port plug from your first stage regulator using the appropriate size wrench The HP port on all U S Divers regulators is clearly marked with the letters HP NOTE
18. biophysical model of decompression theory However neither it nor any 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 all standard safe diving practices as well as the warnings and cautions contained in this manual Guidelines for Using the Monitor 3 Air The following guidelines for using the Monitor 3 Air are derived from the latest medical research and the recom mendations of the American Academy of Underwater Sciences for diving with dive computers Following these guidelines will increase your safety while diving but cannot guarantee that decompression sickness will not occur 1 In accordance with the recommended maximum diving limit of all instructional agencies do not dive deeper than 130 feet 40 meters 2 Do not use the Monitor 3 Air for planned decompres sion diving The decompression algorithm contained in the Monitor 3 Air should be used only for emergency or unintended decompression 3 On all no decompression dives with the Monitor 3 Air make a safety stop for three to five minutes between 10 and 30 feet 3 and 12 m before surfacing 4 Never use the Monitor 3 A
19. cluding the presence 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 point later in the day 42 moniworSair Activation from Ready Mode From Ready Mode touch contacts A amp B The STEP 1 computer will emit one beep and the Dive Plan Icon will appear in the mode zone Ready Mode e U S DIVERS NOTE Always moisten your fingertips before touching the contacts Otherwise you cannot get a good electrical connection Contacts only need to be touched momentarily unless noted other wise Section 4 Pre Dive Planning Mode Touch contacts A amp D to confirm the selection SITES The Monitor scrolls from 50 to 200 feet in 10 foot The word RUN will flash for about five seconds increments For each depth the computer gives and then start scrolling through the available the maximum allowable no stop time at that time depth combinations depth Note If you want to stay longer than the no stop time limit proceed to Planning a Decompres sion Dive on page 46 moniwr7Sair 43 Section 4 Pre Dive Planning Mode Activation from Surface Mode aa Touch con
20. eeseeessseseeeeeeeeeeeeaas 31 AA ne ne nes tnes en ces nids been uen 33 Memory Mode 35 CON CI MIC WW ES a Se Denon 36 Downloading the Memory to a PC 36 ACIIVATION nan tan an nn tts 38 Scrolling through Logged Dives 39 Exiting Memory Mode 39 Pre Dive Planning Mode 41 ON SIMIC SR a sets 42 Activation from Ready Mode 42 Activation from Surface Mode 44 Planning a Decompression Dive 46 Care amp Maintenance 49 COVER NN Ne Mie 50 Care Before the Dive cccccseecceeseeeeeeeeeeeeeeeees 50 Care During the Dive cv creioane a 50 Care After the Dive ccccccccceeceseceeeeeeeeeeeeeeeeeens 51 Annual Dealer Inspections amp Factory Service 51 Operating Temperature 52 Replacing the Battery ccccccsseeessseeeseeeeeeeeees 52 Reference 53 Technical Specifications cccccceseeeeceeeeeeeeeeeeeees 54 ZHEL8 ADTAIQONTANT Kiss ne 55 LS DIVERS ONNE sn 57 Warranty Registration 59 INTRODUCTION Introduction Congratulations on the purchase of your Monitor 3 Air dive computer Our designers have condensed important dive planning information into a user friendly dive instrument By combining graphics with bold alphanumerics we have created an easy to use computer that provides dive data at a glance A
21. er entering seconds after turning on the valve the water and submerging below four feet The depth indication may be delayed for a few seconds moniwarSair 15 Section 2 Diving with the Monitor 3 Air Functions During the Dive Current Depth Current depth is displayed in one foot increments down to a maximum of 330 feet When the depth 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 Current depth display at 100 feet U S DIVERS 9 16 montre air Current depth J display at 2 feet or shallower Section 2 Diving with the Monitor 3 Air 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 O minutes Dive time 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 Maximum depth display moniwarSair 17 Section 2 Diving with the Monitor 3 Air Ascent Rate The optimal ascent ra
22. f charge excluding shipping and handling charges Limitations This warranty specifically does not extend to the plastic computer face battery accidental damage abuse modification or tampering The original warranty card must be on file at U S Divers to be eligible for the two year coverage and any warranty service This card is supplied in this manual and must be mailed within 15 days of purchase Warranty is non transferable and applies to the original owner only Warranty service does not include the price of labor It covers replacement or repair of parts only Warranty Conditions Product must have been purchased from an Authorized U S Divers Pro Line Dealer If this product is obtained from 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 responsibility to establish with U S Divers or an Authorized U S Divers Pro Line Dealer that the unit has such a defect and for returning it to the service center post paid and well protected against damage in transit accompanied by proof of the original purchase date and details of the fault noted Servicing or tampering by unauthorized parties will invalidate the warranty
23. five minute delay allows you to come to the Five minutes after surfacing the Monitor 3 enters Surface surface to orient yourself then resume the dive If you Mode While in Surface Mode the Surface Mode Icon stay at the surface longer than 5 minutes the dive is appears at the bottom of the icon window entered into the logbook and the Monitor 3 Air switches into surface mode Display immediately upon surfacing Surface mode icon display e U S DIVERS 9 U S DIVERS 9 mmoniwrSair 25 Section 2 Diving with the Monitor 3 Air Wait to fly Time Wait to fly time is the minimum amount of time you should wait before flying in a commercial airliner Wait to fly time is displayed in hours and is denoted by the no fly symbol immediately above it WARNING Flying while the Monitor 3 Air is still displaying wait to fly time may lead to serious injury or death from decompression sickness Wait to fly time display U S DIVERS 26 montre air Wait to fly Recommendations The Divers Alert Network DAN has made the following recommendations regarding wait to fly time 1 A minimum surface interval of 12 hours would be required in order to be reasonably assured a diver will remain symptom free upon ascent to altitude ina 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
24. h all the altitude sectors 30 moniworSair U S DIVERS 9 U S DIVERS Altitude adaptation display upon exceeding the altitude limit Diving display when J altitude limit has been exceeded Section 2 Diving with the Monitor 3 Air Summary of Attention Messages and Alarms The Monitor 3 Air draws your attention to certain situa tions and warns you of unsafe diving practices Attention messages and alarms are always visual and acoustical while underwater they are only optical at the surface except for the decompression alarm Attention Messages Attention messages are given by symbols letters 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 o U S D End of no stop time To avoid making a decompression dive a 0 flashes during the last minute of no stop time to alert you to ascend to a shallower depth Also two beeps are ded gt sounde md 4 secs U S DIVI Air Time Remaining is less than 3 minutes To avoid a potential out of air situation immediately begin your ascent mr id e 4 secs e moniwr7Sair 31 Section 2 Diving with the Monitor 3 Air o High air consumption Losttran
25. ile wearing the computer on your wrist i e reaching into a lobster hole to capture the tasty crustacean CAUTION Scratches to the computer body or gauge face are not covered by the Two Year Limited Warranty Section 5 Care amp Maintenance Care After the Dive Annual Dealer Inspections amp Factory Service CAUTION If the Monitor 3 Air transmitter is not Factory service was discontinued in 1997 Please contact A attached to a first stage regulator while soaking the original manufacturer Uwatec at 800 467 2822 explained below make sure that water is not allowed to enter the high pressure inlet Water entering the transmitter may cause damage to the internal components After each day of diving soak the Monitor 3 Air in a warm fresh water bath to dissolve salt crystals To dissolve heavy salt buildup use a slightly acidic vinegar water bath After removing the computer 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 whole regulator tank system in a bath of water By applying pressure to the regulator you absolutely prevent any water from entering the regulator
26. ion 2 DIVING WITH THE MONITOR 3 AIR In this section Preparation for the dive Functions during the dive Functions at the surface Summary of Messages and Alarms Section 2 Diving with the Monitor 3 Air Preparation for the Dive STE Switch on the Monitor 3 Air by touching contacts A and D Check the display to make Note The following preparation instructions assume that sure all the display elements are lit the transmitter is installed correctly into your first stage regulator see page 8 and that it is paired with the Monitor 3 Air computer see page 9 WARNING If the Monitor 3 Air transmitter is not A correctly installed or not paired with the computer it will not perform properly If you rely on the computer in this condition to plan your dive you risk serious injury or death I psi bar n 5 15 45 10 30 80 nn ss A STEP 1 Mount the regulator with transmitter attached onto the SCUBA cylinder Sis Li your cylinder has a reserve valve commonly referred to as a JU valve make sure the reserve lever is in the full open position lever is pulled down STEP 4 Open the cylinder valve The transmitter Switches on automatically when it senses pressure 14 montre air Section 2 Diving with the Monitor 3 Air Check the cylinder pressure reading The The Monitor 3 Air is now in Ready Mode The cylinder pressure reading appears about 10 computer switches to Dive Mode aft
27. ir for repetitive rectangular dives deeper than 60 feet 18 meters A rectangular dive is a dive that is perfomed for its duration at a uniform depth 5 Always make the deepest dive of the day first when repetitive dives are planned and for each successive dive make sure that the deepest portion of that dive is done at the beginning of the dive 10 Tis The Monitor 3 Air is designed for dives made with compressed air only Do not use the Monitor 3 Air for dives made with nitrox or other mixed gases All divers using dive computers to plan dives and indicate or determine no decompression decompres sion status must use their own computer If the Monitor 3 Air fails at any time during the dive the dive must be terminated and appropriate proce dures including a slow ascent and a 3 to 5 minute safety stop should be initiated immediately On any given dive all divers in a buddy group must follow the most conservative dive computer for that particular dive No dive computer can account for dives made without it Do not dive for a period of at least 24 hours before starting a dive series with the Monitor 3 Air You MUST follow the ascent rates as indicated by the Monitor 3 Air If the computer fails ascend to surface no faster than 60 ft min 18 m min 12 15 14 15 16 gS You MUST be familiar with all signs and symptoms of DCS before using the Monitor 3 Air Seek IMMEDIATE treatment for decompre
28. ly descend to a single depth stay at that depth for the duration of the dive then immediately surface from that depth This type of dive profile is referred to as a rectangu lar dive profile figure 1 In reality however most recre ational divers go to the deepest depth first and make a gradual ascent to the surface This type of dive profile is referred to as a multilevel dive profile figure 2 Introduction ap Multilevel diving is where the Monitor 3 Air excels By continuously calculating the nitrogen absorption release of all the compartments the computer updates the amount of no decompression time NDT you have left As you ascend to shallower 00 depths the computer credits III TI you with more allowable RE 10 15 20 25 3095 NDT if you go deeper it TIME reduces the NDT available Figure l Rectangular Profile 50 EPTH N d Figure 2 Multi Level Profile DEPTH S 100 0 5 10 15 20 25 30 35 40 45 50 55 TIME DIVING RESPONSIBLY Years of research and thousands of dives have gone into the mathematical formulas used by the Monitor 3 Air However the computer does not have special 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
29. mpression sickness for future repetitive dives the surface interval should be planned long enough to 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 is displayed the amount of Atn time for the following dive can increase considerably During the dive no stop times will be much shorter and decompression times will increase 28 montre air e U S DIVERS Microbubble formation warning Atn Attention Section 2 Diving with the Monitor 3 Air Diving at Altitude The Monitor 3 Air measures the atmospheric pressure even while in Sleep Mode If the computer detects a higher altitude it automatically switches on and displays the adaptation time This is the time after which your body is considered desaturated and stable at the given altitude Altitude adaptation J time display Adt Adapt e U S DIVERS Altitude 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
30. n if you stay within the no stop limits Decompression time necessary for the prevention of microbubbles can increase greatly if the ascent rate is exceeded At great depth ascending too slowly may cause heightened saturation of tissues and increase both decompression 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 minutes with 99 being the highest number displayed If 99 is displayed you have 99 minutes or more of no stop remaining No stop time is easily identified by the no stop arrow located directly above it No Stop Time Display e U S DIVERS moniwarSair 19 Section 2 Diving with the Monitor 3 Air WARNING There is an acoustic alarm if no stop time is less than one minute In this last minute the no stop display shows a flashing 0 In order to prevent a decompression dive you must ascend immediately WARNING It is unsafe diving practice to push the Monitor 3 Air or any other decompression tool to its limits Avoid no stop times of less than 3 minutes at any given depth ade No stop time at 0 J minutes remaining U S
31. nected whenever it is in range Note The pairing procedure only needs to performed once before the first use After that the only time you need to perform the pairing procedure is when you use a new transmitter new computer or have the battery changed Always check the cylinder pressure before every dive For best possible reception it is best to fit the transmitter on the same side of the regulator first stage where you will wear the wrist unit For example if you wear the computer on your left wrist mount the transmitter on 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 ZONE will remain blank and you will need to monitor your cylinder pressure using a conventional gauge 12 moniworsair Checking the Battery Power You can manually check the battery power of the Monitor 3 Air While in Ready Mode or Surface Mode touch contacts A amp D The word bat will be displayed along with the battery power Battery power is given as a percentage with 99 being the highest percentage displayed Its a good idea to check the battery power before you start a series of dives Sect
32. obust instrument designed to withstand the rigors of SCUBA diving However you still need to protect it from shock extreme heat chemical attack and tampering Even though the Monitor 3 Air s material is tough and durable it is susceptible to chemical attack and scratches Chemical attack can be in the form of spray propellants gasoline fumes in your garage or boat and alcohol U S Divers can replace scratched gauge faces However small scratches naturally disappear underwater CAUTION Never use aerosol sprays including silicone sprays on or near the Monitor 3 Air The propellants may chemically attack the plastic causing the plastic case to crack 50 moniworSair Care Before the Dive 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 Monitor 3 Air in its protective case until you are ready to dive Never leave the computer exposed where someone could accidentally step on it or drop something on it Care During the Dive The most common damage inflicted on a computer while underwater is scratches to the computer face Avoid inserting your hand into rocky holes wh
33. or exclusion may not apply to you Pay special attention to warnings and cautions which are denoted by this symbol WARNINGS alert you to any procedure or situation that may result in serious injury or death CAUTIONS alert you to any situation or technique that will result in damage to the product Safety Considerations You must carefully read this entire manual before using your Monitor 3 Air WARNING Diving has many inherent risks Decom pression sickness is among the most serious of those risks Even if you follow the instructions in this manual carefully it is possible that you may be seriously injured or die from decompression sickness or some other inherent risk of SCUBA diving Unless you are fully aware of these risks and are willing to personally accept and 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 Monitor 3 Air can increase your diving enjoyment and reduce the risk of decompression sickness DCS if they are not followed you will be placing yourself at serious risk for DCS The Monitor 3 Air is a technically advanced tool based on a
34. 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 diving rule that is guaranteed to prevent decompression sickness completely Rather there can be a guideline that represents the best estimate for a conservative surface interval for the vast majority of divers There will always be an occasional diver whose physiological makeup or special diving circum stances will result in the bends U S Divers recommends that you follow either the DAN recommendation or the wait to fly time shown by the Monitor 3 Air which ever is longer Section 2 Diving with the Monitor 3 Air Desaturation Time Desaturation time is the amount of time it takes 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 moniwarSair 27 Section 2 Diving with the Monitor 3 Air Microbubble Warning Repetitive diving may cause microbubbles to accumulate in the lungs if the surface interval between dives is not long enough Ignoring decompression stops or an excessive ascent rate can also lead to bubble formation In order to reduce the risk of deco
35. s with all diving equipment it is important to understand the features and functions of the Monitor 3 Air Before using the Monitor 3 Air it is essential to read this manual in its entirety Contained within this easy to read manual are illustrations to aid you in the complete understanding of the computer Section 1 instructs you on preparing the Monitor 3 for its first use Section 2 explains all the functions and screen displays while on a dive Section 3 shows you how to recall the dive memory Instructions on planning a future dive are given in Section 4 Care amp Maintenance tips are covered in Section 5 Lastly the reference section contains the technical specifications and a description of the algorithm 2 moniter fair 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 rates The Monitor 3 Air tracks these compart ments constantly providing you with up to the minute decompression information MULTI LEVEL DIVING If you use or have used dive tables you know the total amount of time you can stay under water is based on the maximum depth reached during the dive Dive tables such as the U S Navy dive tables assume that you immediate
36. smission g p When there is a significant increase in the air consump tion the warning icon If the computer does not receive data from the trans mitter the antenna symbol is TTIR appears accompanied by arar ES N two beeps Relax and breathe DSi two beeps If this occurs gig age frequently check the position of the transmitter or com DLL puter If situation persists for ae more than 40 seconds air 4 secs e information will no longer be displayed more slowly Le 5 g LSI bY LY g D U A 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 message is displayed no stop times will be reduced and decompression times will be longer Lost transmission after 40 seconds J h iv 32 montre air Section 2 Diving with the Monitor 3 Air 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 Fastascent md 4 Reduce your ascent rate see page 18 for more details on ascent rate p gt lt M PUS CN em pa ed c _ iy J Ne gt mulda oo Air Time Remaining 0 The air supply may be insufficient to safely
37. ssion 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 decompression sickness Always observe the optical alarm signals of the Monitor 3 Air Avoid situations of increased risk for DCS which are marked with a warning sign in this manual Never dive the Monitor 3 Air to its limits as well as other dive computers and tables Give yourself a margin of safety by always leaving a few minutes of no stop time before making an ascent Avoid repeated ascent and descents yo yo diving while using the Monitor 3 Air DO NOT perform repetitive decompression dives Doing so increases the risk of DCS Carefully inspect your Monitor 3 Air computer for any signs of damage or malfunction before every dive Table of Contents Safety Considerations VV i Guidelines for Using the Monitor 3 Air i Introduction 1 What is a Dive Computer 2 Definition of Compartments sessseeeseneeeennneneneeeererrrrrn nnne nen 2 M t Lever DIVING ssania NS dearth 2 DIVING FRESDONSIDIV ase e es sie 3 Features of the Monitor 3 Air 4 The Computer Screen 4 Th El ctrical Contacts hs doses ever ns des 4 TRS TTANSMINE Las En at ne 6 Preparation 7 Attaching the Transmitter to Your Regulator 8 Pairing the Wrist Unit to the Transmitter
38. ssues If these microbubbles partially impair circulation the rate of gas diffusion and saturation tolerance of surrounding tissues are changed If required both decompression time and remaining bottom time will be adjusted in such a way that already existing microbubbles will stop growing Increased decompression monwrSair 55 Section 6 Reference time will also assist those local areas of impaired circulation to desaturate with less risk of decompression sickness The calculation of microbubbles results in altered ascent instructions If microbubbles are assumed to be present based on the data used by the Monitor 3 Air the ascent rate is reduced to 23 feet minute This 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 isa 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 same responsible diving practices taught by all diving certifications are still absolutely necessary in order to safely dive with the Monitor 3 Air 56 montre air
39. st unit to work together they must 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 Monitor 3 transmitter 1 e your dive buddy s transmitter To pair a transmitter to a wrist unit follow this step by step procedure moniworsair 9 Section 1 Preparation yess Place the Monitor 3 Air wrist unit directly against the transmitter Turn on the cylinder valve Within six seconds the message PAIr will appear flashing in the upper tank pressure display seams 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 10 moniworSair Section 1 Preparation SAS The first cylinder pressure reading will be If the procedure is not successful a FAIL message will displayed within 15 seconds appear If this happens close the cylinder valve purge all air from the regulator and repeat the procedure Lr 1 b moniwarSair 11 Section 1 Preparation Once paired the Monitor 3 Air will always display the tank pressure of the cylinder to which the transmitter is con
40. tacts A amp D to confirm the selection The words Add and Int appear along with a eae From Surface Mode touch contacts A amp B The flashing surface interval time computer will emit one beep and the Dive Plan Icon will appear in the mode zone 44 montre air Section 4 Pre Dive Planning Mode If you do not want to add any additional surface After adding the desired amount of surface time go to step 4 If you do want to add surface interval time touch contacts A amp D The word time touch contacts A amp C If you add too much run flashes for a few moments then the surface time and want to decrease it touch Monitor starts scrolling from 50 to 200 feet in mde contacts A amp B 10 foot increments For each depth the com puter gives the maximum allowable no stop time at that depth Note Surface interval time increases in 15 minute increments for the first 6 hours 30 minute increments from 6 to 12 hours and 1 hour increments after that Note If you want to stay longer than the no stop time limit proceed to Planning a Decompres sion Dive on page 46 NO STOP U S DIVERS montwrSair 45 Section 4 Pre Dive Planning Mode Planning a Decompression Dive Before planning a decompression dive reread the import warning at the beginning of this section STEP 1 When the Monitor 3 Air scrolls to the desired depth touch contacts A amp D The word Add appears in the
41. te varies between 23 and 67 ft min depending on the depth Ascent rate is displayed as a percentage of the allowable ascent rate rounded to the nearest 10 For example if the allowable ascent rate at the current depth is 67 ft min and you ascend at 33 ft min the ascent rate will display 50 If you ascend at 67 ft min the ascent rate will show 100 WARNING The prescribed ascent rate must be observed at all times Exceeding the prescribed ascent rate can lead to microbubble formation which can lead to serious injury or death due to decompression sickness Ascent Rate Display e U S DIVERS 18 moniworsair 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 allowable rate increases Below is a summary of the ascent warnings Ascent Optical Acoustic Rate Alarm Alarm fu ms N m af C3 ow N gt in 7 ate ne gt A a a WARNING Reduce your ascent speed whenever the above alarms appear Failure to do so may lead to serious injury or death due to decompression sickness Section 2 Diving with the Monitor 3 Air Some Notes on ascent rate The Monitor 3 Air may require a decompression stop due to an improper ascent rate eve
42. thus the skin and muscle compartments in the Monitor 3 Air have variable half time periods and saturation tolerances Decompression information is calculated according to the diver s individual workload and decrease in skin tempera ture The decrease in skin temperature is based upon the water temperature and the dive time By considering these changes 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 Microbubble Formation 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 risk of decompression sickness The model calculates the formation of microbubbles depending on various assumed influences in arterial and venous blood During normal slow ascents microbubbles form mainly in venous blood During fast ascents microbubbles may also form in arterial blood and the body s tissues If a particular dive profile results in the formation of microbubbles decreased bottom time and or increased decompression times and increased wait to fly times will be indicated Microbubbles can form if the diver makes a fast ascent ignores decompression stops or makes repeated ascents during a dive yo yo diving These microbubbles can form in arterial blood and body ti
43. to decompression sickness Decompression stop information display U S DIVERS moniwrSair 23 Section 2 Diving with the Monitor 3 Air Total Ascent Time Total Ascent Time is the addition of all the decompression stop times plus the amount of time it takes to ascend from the current depth to the first decompression stop Note Total ascent time is calculated with an optimal ascent rate of 100 and normal workload High workloads and different ascent rates may change the total ascent time Total Ascent Time Display 24 montre air 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 Mode can influence the computer s calculations for three days after the incident due to the presence of microbubbles Section 2 Diving with the Monitor 3 Air Functions at the Surface Surface Mode Note Surface mode will stay visible for 3 minutes After that the screen will go blank to save battery power To reacti Upon surfacing vate the surface mode display touch contacts A and D After reaching the surface the Monitor 3 automatically switches into wait mode for five minutes This is the Surface mode icon amount of time necessary to recognize the end of the dive The
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