OCEANIC ® XTC-100™ owner's guide
® RESPONSIBLE COMPUTER DIVING • Always Plan Each Dive • Always Limit Your Dive to the Level of Your Training and Experience • Always Make Your Deepest Dive First • Always Make The Deepest Part of Every Dive First • Check Your Computer Often During the Dive • Do A Safety Stop on Every Dive • Allow Adequate Surface Interval Between Each Dive • Allow Adequate Surface Interval Between Each Day of Diving (12 Hours or Until Your Computer Clears) Read And Understand This Owner's Guide* Thoroughly Before Using the
XTC-100 WARNINGS and SAFETY RECOMMENDATIONS • The XTC-100 is intended for use by recreational divers who have successfully completed a nationally recognized course in scuba diving, and diving with enriched nitrogen-oxygen (nitrox) mixtures. • It is intended only for no decompression diving, NOT intentional decompression diving. • It must not be used by untrained persons who may not have knowledge of the potential risks and hazards of scuba diving, and diving with enriched nitrogen-oxygen (nitrox) mixtures.
® LIMITED TWO-YEAR WARRANTY For details, refer to the Product Warranty Registration Card provided. COPYRIGHT NOTICE This owner’s guide is copyrighted, all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine readable form without prior consent in writing from Oceanic / 2002 Design.
XTC-100 CONTENTS FEATURES and DISPLAYS ....................................................................................... 1 Introduction ............................................................................................................................................... 2 Interactive Control Console ....................................................................................................................... 2 Informational Displays ...................................................
® CONTENTS (CONTINUED) Entering Settings ..................................................................................................................................... 19 • To Set: Alternate On/Off ................................................................................................................... 19 • To Set: Audible Alarm On/Off ........................................................................................................... 20 • To Set: Depth Alarm Set Point .............
XTC-100 CONTENTS (CONTINUED) POST DIVE MODES ................................................................................................. 39 First 2 Hours After a Dive ........................................................................................................................ 40 • Transition Period .............................................................................................................................. 40 • To view Temperature/Date/Time .................................
® CONTENTS (CONTINUED) • Immediate Violation Mode ............................................................................................................... 56 • Gauge Mode .................................................................................................................................... 57 • Permanent Violation ........................................................................................................................ 57 Oxygen Exposure ...................................
XTC-100 FEATURES and DISPLAYS refer to page 14 for - WARNINGS and SAFETY RECOMMENDATIONS 1
® INTRODUCTION Welcome to Oceanic and thank you for choosing the XTC-100 ! The XTC-100 has a wide array of features described in detail throughout the pages that follow. Due to the importance that they be understood thoroughly prior to using the XTC-100, information will be expanded upon and some refreshed as you proceed. Relax and read through the complete guide.
XTC-100 INFORMATIONAL DISPLAYS Operational modes and status information are visually represented numerically and/or graphically and can be understood at a glance with the aide of universal icons (Fig. 2) that identify and bring quick focus to the displays. Segmented bar graphs will show how close you are to critical limits. a. b. c. d. e. f. g. h. Each XTC-100 numeric and graphic display represents a unique piece of information.
® UNIVERSAL GRAPHIC DIVER INTERFACE™ Three bar graphs referred to as the Universal Graphic Diver Interface™ appear around the perimeter of the screens (Fig. 3). These segmented bar graphs are located next to green, yellow, and red color coded portions of the peripheral decal that denote normal, caution, and danger zones, respectively. Fig. 3 - Bar Graphs When underwater, you can quickly focus on the bar graphs to make sure that they are in the green.
XTC-100 representation of just how close you are to the no decompression limit with a yellow Caution (C.Z.) Zone that allows you to make a decision regarding safety stop duration or necessity. The Tissue Loading Bar Graph™ also assists you with managing decompression (explained later) by filling a large red 'ceiling stop required' segment. Oxygen Accumulation (O2) Bar Graph NOTE: Displays associated with oxygen and the O2 bar graph will only appear if FO2 has been set at a value other than 'Air'.
® Variable Ascent Rate Indicator™ (VARI) Segments = Speed (rate) 0 = 0 - 20 fpm (0 - 6 mpm) 1 = 21 - 30 fpm (6.5 - 9 mpm) 2 = 31 - 40 fpm (9.5 - 12 mpm) 3 = 41 - 50 fpm (12.5 - 15 mpm) 4 = 51 - 60 fpm (15.5 - 18 mpm) 5 = 61+ fpm (18.5+ mpm) (when 5, all will flash) The Variable Ascent Rate Indicator™ (Fig. 6) is provided to help you avoid excessive ascent rates by displaying a visual representation of ascent speed, rather than just showing that you are ascending too fast.
XTC-100 least amount available of the three). The specific time being displayed is identified by the No Decompression Dive Time icon or the O2 Time icon (Fig. 7). This unique feature has been granted U.S. Patent No. 4,586,136. No Decompression Time No Decompression Dive Time Remaining No Decompression Dive Time Remaining is the maximum amount of time that you can stay at your present depth before entering a decompression situation.
® control is based upon experiments designed and conducted by Dr. Ray Rogers and Dr. Michael Powell in 1987. Diving Science and Technology® (DSAT), a corporate affiliate of PADI®, commissioned these experiments. FT Oxygen Accumulation Time Remaining FT MAX O2 a b Fig. 9 - O2 Time Remaining a b FT FT MAX Oxygen accumulation (exposure) during a dive, or 24 hour period, appears graphically as the Oxygen Accumulation (O2) Bar Graph.
XTC-100 During a Decompression Dive, the required Ceiling Stop Depth is displayed from 60 to 10 feet (20 to 3 meters) in 10 foot (3 meter) increments. Time Displays FT Time displays (Fig. 11 a & b) are shown in hour:minute format (i.e., 1:02 represents one hour and two minutes, not 102 minutes!). An exception to this is Decompression Stop Time that displays 0 to 99 minutes (:00 to :99).
® AUDIBLE ALARM During situations that may pose potential danger, one Double Beep is emitted. These situations are: • Entry into decompression. • Partial pressure of oxygen equal to or greater than 1.40 ATA. 10 DI RESP O VER When the XTC-100 senses immediate danger to you, it emits One Beep per Second until the situation is corrected (if the Audible Alarm feature is set ON). These situations are: N SI LE B • Descent deeper than the Depth Alarm Set Point.
XTC-100 If you enter a Delayed or Immediate Violation Mode, a Single Long Beep will be emitted. This will occur if: • Depth is shallower than the required stop depth for more than 5 minutes. • Required Decompression exceeds a 60 FT/ 18 M ceiling. Immediately following activation and a diagnostic check the XTC-100 will emit a Short Beep.
® NOTE: Extensive use of the backlight reduces estimated battery life. Also, the backlight will not activate during a 'low battery condition', or when downloading data to a PC. OPERATING TEMPERATURE The XTC-100 will operate in almost any temperature diving environment in the world between 32 and 140 °F (0 and 60 °C). 140°F (60°C) Operating Temperature Range 32°F (0°C) 12 At extremely low temperatures, the LCD may become sluggish, but this will not affect it's accuracy.
XTC-100 a. b. c. d. e. f. g. h. i. j. k. l. m. n.
® WARNINGS and SAFETY RECOMMENDATIONS • Inspect your XTC-100 prior to every dive, checking for any signs of the entrance of moisture, damage to the housing, or damage to the LCD display. If these or other signs of damage are found, return the unit to an Authorized Oceanic Dealer. DO NOT attempt to use it until it has received factory service.
XTC-100 ACTIVATION and SETUP refer to page 25 for - WARNINGS and SAFETY RECOMMENDATIONS 15
® ACTIVATION To activate the XTC-100, press the Select (Lower) button once and release. It will immediately enter Diagnostic Mode, displaying all “8’s” (Fig. 14), followed by “dashes”, and a countdown from 9 to 0. While conducting diagnostics, the displays are illuminated by the Smart Glo™ backlight as display functions and battery voltage are checked to ensure that everything is working correctly.
XTC-100 SURFACE MODE Surface Mode, identified by the Surface Time icon (Fig. 15a), immediately follows Diagnostic Mode after initial activation. Information displayed includes the Dive Number '0' (no dive made yet) and Surface Time with flashing colon. If battery voltage is below the level sufficient for a day's operation, the Battery icon will be displayed (Fig. 16a).
® The menu structure of the Set Mode enables you to: • • • • • • • • • • set Dive Mode Alternate Display (On or Off) set Audible Alarm (On or Off) select Depth Alarm value set Year/Month/Day select Hour Format (12 or 24 hour) set Hour/Minute select Dive Profile Sampling Rate (for PC download data) set Units of Measure (Imperial or Metric) set FO2 Default (On or Off) initiate download of data (External Access) DI RESP O VER Before going diving, enter settings that will be common for each of your dives
XTC-100 ENTERING SETTINGS • The Advance (Upper) button is used to gain access to settings. • The Select (Lower) button is used to toggle between, or scroll through, the individual set points available for each of the settings. • The Advance (Upper) button is then used to accept and save the set point and revert to Surface Mode, or continue to the next setting. • See page 26 for a 'Summary of Access to Set Modes' that also notes 'settings entered by the factory'.
® TO SET: AUDIBLE ALARM ON/OFF 'OFF' - If the unit senses a condition that poses immediate danger (page 10), it emits a double beep instead of one beep per second. Other alarms are silenced. 'ON' - alarms will be sounded for all conditions as listed on pages 10 and 11. • press BOTH buttons simultaneously, while in Surface Mode • press Advance (Upper) button 1 time • the Audible Alarm icon appears with 'On', or 'Off', flashing (Fig. 18) Fig.
XTC-100 • press Select (Lower) button until the desired Max Depth value appears • press Advance (Upper) button to accept the setting displayed, and either • revert to Surface Mode (if this setting was changed), or • advance to Set: Year (if this setting was not changed) TO SET: DATE/HOUR FORMAT/TIME • press BOTH buttons simultaneously, while in Surface Mode • press Advance (Upper) button 5 times • the Date appears with the Year setting (Fig.
® • the Hour Format appears flashing (Fig. 21) • 12 Hr format = 12: Am to 11: Pm • 24 Hr format = 0: to 24: (hours) • press Select (Right) button to toggle between '12' and '24' • press Advance (Left) button 1 time to accept the setting displayed • the Time appears with the Hour setting (Fig. 22a) flashing Fig. 21 - Set Hour Format • press Select (Right) button until the correct Hour appears. • press Advance (Left) button 1 time to accept the setting displayed • the Minute setting (Fig.
XTC-100 TO SET: SAMPLING RATE Sampling Rate is the Time, or Depth, interval at which data samples will be recorded for subsequent download to the OceanLog™ PC software program. It has 'no effect' upon displayed data or data stored in the unit's viewable Log. Rates available are 2 FT (.5M), 5 FT (1.5 M), 10 FT (3 M), 2 SEC, 5 SEC, 10 SEC, 15 SEC, 20 SEC, 25 SEC, 30 SEC. When lower rates (e.g., 2 FT or 2 SEC) are selected more samples are recorded per dive making profile graphs smoother.
® TO SET: UNITS OF MEASURE FT FT Fig. 24 - Set Units of Measure • press BOTH buttons simultaneously, while in Surface Mode • press Advance (Left) button 12 times • the Units of Measure icons appear flashing (Fig.
XTC-100 EA MODE Although included in the menu structure, External Access (EA) Mode has no settings. It is accessed only when data is being downloaded (copied) to the OceanLog™ PC software program for storage and viewing. This is described on page 46. • press Advance (Upper) button to 'bypass EA Mode' (Fig. 26) and revert to Surface Mode Fig. 26 - EA Mode WARNINGS and SAFETY RECOMMENDATIONS • Never activate the XTC-100 underwater. This may result in inaccurate depth and no-decompression time displays.
® SUMMARY OF ACCESS TO SET MODES (settings entered by the factory appear in italics) To access a specific Set mode from the Surface Mode, press the button(s) as follows: SET MODE To access/set> TO ACCESS Both '1' time> TO VIEW TO SAVE • Alternate Display (Off) • Audible Alarm (On) • Depth Alarm (330 ft) • Year (1999) • Month (1) • Day (1) • Hour Format (12) • Hour (12) • Minute (00) • Sample Rate (10 FT) • Units (Imperial) • FO2 Default (On) • EA (download) Upper '0' times> Upper '1' time> Upper '2' t
XTC-100 PRE DIVE and DIVE MODES refer to page 38 for - WARNINGS and SAFETY RECOMMENDATIONS 27
® OPERATIONAL MODES While on the surface, the Interactive Control Console enables you to access six operational modes and activate the backlight. During a dive, it enables you to view 'alternate' displays of information and activate the backlight. TEMPERATURE/DATE/TIME MODE To view Ambient Temperature/Date/Time (Fig.
XTC-100 FO2 50% Default If the Default is set to 'On' and FO2 is set to a value 'greater than 21%', the FO2 value will automatically revert to 50% 10 minutes after that dive. • In this case FO2 must be reset for each repetitive nitrox dive, or the value will automatically 'default' to 50 (Fig. 28) and the dives will be calculated based on 50% O2 for oxygen calculations and 21% O2 (79% nitrogen) for nitrogen calculations.
® Setting FO2 To access FO2 Mode while in the Surface Mode and set the unit for Air or the percentage (%) of oxygen (FO2) in your nitrox mix: b FT MAX O2 a Fig. 30 - Setting FO2 • press the Advance (Upper) button 2 times • press the Select (Lower) button repeatedly, or press and hold it, until the value of FO2 for the nitrox mix being used is displayed • the FO2 value displayed (Fig. 30a) will advance from 21 to 50 (%) in increments of 1 (%), then display 'Air' again.
XTC-100 Once a dive is made with the XTC-100 set as a nitrox computer (FO2 set for a numerical value), it cannot be set for 'Air' until 24 hours after the last nitrox dive. However, you can set FO2 for 21% for use with air. PRE DIVE PLANNING SEQUENCE™ Oceanic strongly recommends that you review the Pre Dive Planning Sequence (PDPS) prior to every dive to help you plan your dive as required to avoid exceeding no decompression or oxygen exposure limits.
® With each depth display, you will see either 'predicted' no decompression limits based upon your previous dive profiles (if calculated to be nitrogen controlled), or 'predicted' oxygen tolerance limits based upon accumulation of oxygen (if calculated to be oxygen controlled). FT Fig. 33 - Nitrogen Control No decompression times are only displayed for depths where there is at least 3 minutes of dive time available at the depth, taking into account a descent rate of 120 feet (36 meters) per minute.
XTC-100 Depth and Time displays will not appear until the O2 bar graph recedes into the green (normal) zone (e.g., your daily oxygen dosage decreases an amount equivalent to the amount accumulated during the latest dive completed). FT NO DECOMPRESSION DIVE MODE As long as it is activated on the surface, the XTC-100 will enter the No Decompression Dive Mode when you descend deeper than 5 feet (1.5 meters), regardless of the operating mode it is in.
® Secondary Display (access if Alternate is set ON or OFF) To view water Temperature, Time of Day, and if FO2 was set for a numerical value, display the current level of PO2 (Fig. 38): • press the Advance (Upper) button 1 time • the unit will revert to the Main Display after 10 seconds, if the Advance (Upper) button is not pressed again. Alternate Display (access only if Alternate is set ON) Fig.
XTC-100 DECOMPRESSION DIVE MODE The XTC-100 provides information that will help you avoid, or if necessary, manage emergency decompression. The Decompression Dive Mode activates when the Tissue Loading Bar Graph enters the red 'DECO' zone (Fig. 40a). VIOLATION MODES The XTC-100 enters Violation Modes when it is unable to predict an ascent procedure.
® ASCENDING TO THE SURFACE While ascending to shallower depths, the segments that have filled up the Tissue Loading Bar Graph will begin to recede (Fig. 41), offering a graphic representation of your multilevel diving capability. By 'backing off' on the bar graph (fewer segments), you can establish and adjust your personal level of conservatism and margin of protection.
XTC-100 The Variable Ascent Rate Indicator™ shows how fast you are ascending. When you exceed the maximum recommended ascent rate of 60 feet per minute (18 meters per minute), the bar graph will enter the red (Too Fast) zone (Fig. 42a). You will be alerted by all segments of the bar graph flashing and an audible alarm which will stop when your ascent rate is slowed.
® WARNINGS and SAFETY RECOMMENDATIONS • The percentage of oxygen (FO2) in the nitrox mix being used must be set 'before each' nitrox dive, unless the FO2 50% Default is set to 'Off'. • The Pre Dive Planning Sequence provides predicted times for subsequent dives. Depending on cylinder size, breathing gas consumption, and oxygen accumulation you may have less time available than indicated because of breathing gas quantity or other limitations.
XTC-100 POST DIVE MODES refer to page 47 for - WARNINGS and SAFETY RECOMMENDATIONS 39
® FIRST 2 HOURS AFTER A DIVE When you ascend to 3 feet (1 meter) or shallower, the XTC-100 will enter Surface Mode and begin counting your surface interval. TRANSITION PERIOD The first 10 minutes is, in affect, a Transition Period during which time the following information is displayed (Fig. 43): Fig. 43 - Post Dive Surface Mode (<10 min) • • • • • Surface Mode icon (flashing). 'Number' of that dive Surface Interval (colon flashing). Tissue Loading Bar Graph indicating current nitrogen loading.
XTC-100 To view that Dive's Log (during the 10 minute Transition Period): • press the Advance (Upper) button 2 times, or • press the Advance (Upper) button 1 time, if viewing Temp/Date/Time • the unit will revert to Surface Mode after 2 minutes, if no button is pressed Data will not be stored in the unit's memory until the 10 minute Transition Period is completed. Once 10 minutes have elapsed, that dive and Transition Period are completed, and a subsequent descent will be considered a new dive.
® FT MAX O2 Fig. 46 - FO2 (Default OFF) To access FO2 Mode: • press the Advance (Upper) button 2 times (while in Surface Mode) • If the FO2 Default was set OFF, the FO2 setting displayed will be the same value previously set (Fig. 46). • If the FO2 Default was set ON, the FO2 value displayed (Fig. 47) will be the 'default value' of 50 (%) and will have to be set for the breathing gas used for the next dive. • press the Select (Lower) button to alter the setting, if required.
XTC-100 The Pre Dive Planning Sequence will only scroll to the maximum depth allowed by the nitrogen or oxygen limit, whichever is in control. The respective bar graph will be displayed to indicate which is in control. b To access Time to Fly and Desaturate Countdowns: • press the Advance (Upper) button 4 times (while in Surface Mode) • The unit reverts to Surface Mode after 10 seconds, unless the Advance (Upper) button is pressed to access the Log Mode. a Fig.
® LOG MODE Information from your 12 latest dives is stored in the Log for viewing. After 12 dives are accumulated, each subsequent dive will overwrite the oldest dive in the log (i.e., the most recent dive deletes the oldest). Log information will not be lost when batteries are removed, but factory service will delete the logs. Dives are displayed in a reverse sequence that starts with the dive most recently recorded back to the oldest of the 12 dives stored.
XTC-100 To access a specific dive's log, press the Advance (Left) button repeatedly. To view the second screen for that dive (Nitrogen Log- Fig.
® To exit Log Mode and return to the Surface Mode: • press the Advance (Upper) button repeatedly to proceed through the remaining recorded dives. • the unit will automatically revert to Surface Mode after 2 minutes, if no button is pressed AFTER THE FIRST 2 HOURS Two hours after the last dive the Surface Mode will no longer be displayed. The Time to Fly and Desaturate countdown timers will be displayed continuously, giving the final countdowns from 22:00 and 9:xx to 0:00 (Fig. 55).
XTC-100 To access the External Access (EA) Mode: • press both buttons simultaneously while in Surface Mode • press the Advance (Upper) button 12 times • the letters EA appear, flashing (Fig. 56) • press the Advance (Upper) button to revert to Surface Mode, or • press the Select (Lower) button to initiate download • the unit will automatically revert to Surface Mode after download is complete, or in 2 minutes if no button is pressed • the backlight will not operate while in EA Mode Fig.
® SUMMARY OF ACCESS TO POST DIVE MODES During the first 2 hours after a dive* (after the 10 minute Transition Period has ended): MODES TO ACCESS TO VIEW Backlight press Either '1 time' Temperature/Date/Time press Upper '1 time' FO2 set press Upper '2 times' > press Lower (hold or repetitive) Pre Dive Plan Sequence press Upper '3 times' > press Lower (hold or repetitive) Fly/Desaturate press Upper '4 times' Log Mode press Upper '5 times' > press Lower (hold or repetitive) Set Mode press B
XTC-100 HANDLING THE EXTREMES refer to pages 62-64 for - WARNINGS and SAFETY RECOMMENDATIONS 49
® AVOIDING AND MANAGING DECOMPRESSION The XTC-100 is a sophisticated instrument designed with capabilities that go beyond the range of recreational diving with compressed air. It will help you to avoid and, if necessary, manage decompression. TISSUE LOADING BAR GRAPH™ The Tissue Loading Bar Graph™ offers you a convenient way to consistently monitor how close you are coming to the No Decompression Limit.
XTC-100 DECOMPRESSION DIVE MODE The XTC-100 is designed to help you by providing a complete representation of how close you are to entering decompression. Decompression Dive Mode activates when theoretical no decompression time/depth limits are exceeded. In the event that you enter Decompression Mode, as indicated by a double beep, the large red segment of the Tissue Loading Bar Graph (Fig.
® Secondary Display (access if Alternate is set ON or OFF) To view water Temperature and Time of Day in place of Current Depth and Total Ascent Time (Fig. 59): • press the Advance (Upper) button 1 time • the unit will revert to the Main Display after 10 seconds if the Advance (Upper) button is not pressed again. FT Alternate Display (access only if Alternate is set ON) Fig. 59 - Secondary Display FT MAX FT Fig.
XTC-100 MANAGING DECOMPRESSION STOPS The amount of decompression credit time that you receive is dependent on depth, with slightly less credit given the deeper you are. You should stay slightly deeper (Fig. 61a) than the Required Stop Depth indicated (Fig. 61b) until the next shallower Stop Depth appears. Then, you can slowly ascend to, but not shallower than, that indicated ceiling Stop Depth. Once all required decompression has been completed, the XTC-100 will switch to the No Decompression Dive Mode.
® CONDITIONAL VIOLATION MODE The XTC-100 will enter the Conditional Violation Mode if you ascend shallower (Fig. 62a) than the Required Decompression Ceiling Stop Depth displayed (Fig. 62b). The audible alarm will beep once per second* and the Total Ascent Time display (Fig. 62c) will flash until you descend below the Required Stop Depth. *If the audible alarm feature was set to OFF, only a double beep will be emitted to alert you.
XTC-100 DELAYED VIOLATION MODE Three conditions cause the XTC-100 to enter the Delayed Violation Mode: FT 1. Remaining 'more than 5 minutes' above the Required Stop Depth. FT The Audible Alarm will emit one long beep and the Total Ascent Time display will flash until you descend below the Required Stop Depth (Fig. 63). You would then need to follow the Stop Depths and Times toward the surface until the Tissue Loading Bar Graph recedes into the caution zone. Fig.
® The XTC-100 cannot accurately calculate decompression times for Stop Depths much greater than 60FT (18M) and offers no indication of how much time spent underwater would result in the need for a greater stop depth. FT FT MAX Fig. 65 - Delayed Violation (deeper than 330ft/99.5m) FT FT MAX 3. You exceed the maximum operating depth (330 feet/99.5 meters). The Audible Alarm will beep once per second* when you descend deeper than the Depth Alarm set point that you selected (set).
XTC-100 GAUGE MODE Once the XTC-100 enters Immediate Violation Mode it will operate with limited functions (Current Depth, Max Depth, and Elapsed Dive Time) in Gauge Mode during the remainder of that dive and for 24 hours after surfacing. The XTC-100 reverts to being a digital instrument without any decompression or oxygen monitoring functions. Dive Time Remaining will not be displayed and the Tissue Loading Bar Graph and O2 Bar Graph will flash as a warning of this condition (Fig. 67).
® OXYGEN EXPOSURE The XTC-100 is a sophisticated instrument designed with capabilities that go beyond the range of recreational diving with compressed air. It will help you to avoid and manage excessive oxygen exposure. a PARTIAL PRESSURE OF OXYGEN Fig. 69 - Current PO2 As depth increases during the dive, the partial pressure of oxygen (PO2) increases. To view the current value of PO2 (Fig. 69a): • press the Advance (Upper) button 1 time to access the Secondary Display.
XTC-100 If partial pressure of oxygen continues to increase, the value of PO2 displayed will increase from 1.40 toward a maximum value of 5.00 ATA in increments of '.01' ATA. When PO2 reaches a value of 1.60 ATA (Fig. 71), the large red segment of the O2 bar graph, the PO2 value, and PO2 symbol will flash continuously and the Audible Alarm will emit one beep per second* as a warning until the level of PO2 decreases below 1.60 ATA.
® If the theoretical amount of oxygen accumulated equals, or exceeds, the limit for a single exposure , or the exposure limit for a 24 hour period, Oxygen Dive Time Remaining becomes 0:00 (Fig. 72). The O2 Bar Graph will enter the red danger zone, the full bar graph will flash, and the Audible Alarm will emit one beep per second* as a warning until the level of oxygen decreases below the exceeded limit. *If the audible alarm feature was set to OFF, only a double beep will be emitted to alert you.
XTC-100 UNEXPECTED LOSS OF DISPLAYED INFORMATION If your XTC-100 stops working for any reason, it is important that you have anticipated this possibility and are prepared for it. O DI RESP Be a RESPONSIBLE DIVER at all times ! VER If you dive in situations where your trip would be ruined or your safety would be jeopardized by losing the use of your XTC-100, an analog or digital backup system or use of standard air (or nitrox) tables is highly recommended.
® WARNINGS and SAFETY RECOMMENDATIONS • There are few legitimate excuses for making unplanned Decompression dives, and the consequences of this type of diving can be severe. By making an unplanned Decompression dive without the necessary preparation and training, you will have placed yourself in an unnecessarily dangerous situation. Allow a surface interval of at least 24 hours before reentering the water in the event a dive requires emergency decompression.
XTC-100 WARNINGS and SAFETY RECOMMENDATIONS • Exiting the water with the Tissue Loading Bar Graph in the red decompression zone greatly increases the risk of decompression sickness, and may result in injury or death. • The oxygen features of the XTC-100 are intended for use only by recreational divers trained for nitrox diving by an instructor certified by a recognized training agency to teach diving with nitrox.
® WARNINGS and SAFETY RECOMMENDATIONS • Maximum limits for exposure to oxygen should not be exceeded, and the consequences of CNS (Central Nervous System) oxygen toxicity can be severe, resulting in Gran Mal convulsions and drowning. • Conducting repetitive dives using enriched nitrogen-oxygen mixtures can lead to oxygen buildup, reducing oxygen tolerance while increasing the risk of pulmonary oxygen toxicity.
XTC-100 CARE and MAINTENANCE refer to page 74 for - WARNINGS and SAFETY RECOMMENDATIONS 65
® CARE AND CLEANING The XTC-100 must be protected from shock, excessive heat, chemical attack, and tampering. The housing, made of an impact resistant resin, is extremely shock resistant but susceptible to chemical attack and scratches. Protect the lens against scratches with a transparent Oceanic Instrument Lens Protector. Small scratches will naturally disappear underwater.
XTC-100 Oceanic recommends that you continue to have this inspection performed every year to ensure your XTC-100 is working properly. The costs of annual inspections are not covered under the terms of the 2 year limited warranty. NOTE: Annual inspections are only performed by Authorized Oceanic Dealers and are not performed by the factory. TO OBTAIN SERVICE Take your XTC-100 to an Authorized Oceanic Dealer or send it to the 'nearest' Facility listed at the right.
® BATTERY LIFE Battery consumption rate varies throughout periods of operation, which begin upon activation and continue for 24 hours after surfacing from a dive. The exact number of dives, or hours of operation, that you will obtain with a battery is subject to variables, such as, temperature, the number of dives conducted during an operational period, and how often the backlight is used. Tests and calculations indicate that a new Tadiran® 1/2AA model TL-2150, .95Ah, 1.
XTC-100 If the unit did not display the Low Battery icon 'prior' to entering the Dive mode, and a low battery condition occurs during a dive, as indicated by the Low Battery icon appearing on the display, there will be sufficient battery power to maintain unit operation 'for the remainder of that dive'. NOTE: The XTC-100 will continue to function on real time for a period of 4 seconds after the battery is removed, maintaining Nitrogen and Oxygen calculations for a repetitive dive.
® BATTERY REPLACEMENT NOTE: The following procedure must be closely adhered to. Damage due to improper battery replacement is not covered by the XTC-100 limited 2 year warranty. BATTERY REMOVAL The battery compartment should only be opened in a dry and clean environment, with extreme care taken to prevent the entrance of moisture or dust. + + Battery Hatch + + Fig. 74 - Case Back 70 Examine the case back to find the Battery Hatch (Fig.
XTC-100 • Closely examine the inside of the battery compartment for any signs of corrosion indicating entrance of moisture into the unit. If found, return your XTC-100 to an Authorized Oceanic Dealer, and DO NOT use it until it has received service. Moisture in the Battery Compartment In the event that your XTC-100 is subjected to a flooded battery compartment, or moisture is found in the compartment, regardless of the cause, it should be returned for 'factory service'.
® BATTERY INSTALLATION + • To replace the battery hatch o-ring, lightly lubricate it with silicon grease and place it on the beveled outer edge of the battery compartment (Fig. 75). Ensure that it is evenly seated. - NOTE: This o-ring must be a genuine Oceanic part that can be purchased from your Authorized Oceanic Dealer. Use of any other o-ring will void the XTC-100 warranty. Fig. 75 - O-ring Installation + Battery (1/2AA) - Battery - Neg Pos + Cavity Housing Fig.
XTC-100 INSPECTION • Activate the XTC-100 and watch carefully as it performs a full diagnostic and battery check and enters Surface Mode. • Observe the LCD display to ensure it is consistently clear and sharp in contrast throughout the screen. • If any portions of the display are missing or appear dim, or if a Low Battery condition is indicated, return the unit to your Authorized Oceanic Dealer for a complete evaluation before attempting to use it.
® WARNINGS and SAFETY RECOMMENDATIONS • Never, under any circumstances, poke any object through any slots or holes of the XTC-100. Doing so may damage the depth sensor, possibly resulting in erroneous depth and/or dive time remaining displays. • If you are in doubt about the accuracy of your XTC-100 depth readings, DO NOT attempt to dive with it until it has been inspected by Oceanic Customer Service. • Never pressure test the XTC-100 in an air environment.
XTC-100 REFERENCE refer to page 76 for - WARNINGS and SAFETY RECOMMENDATIONS 75
® WARNINGS and SAFETY RECOMMENDATIONS • Diving at high altitude requires special knowledge of the variations imposed upon divers, their activities, and their equipment by the decrease in atmospheric pressures. Oceanic recommends completion of a specialized Altitude training course by a recognized training agency prior to diving in high altitude lakes or rivers. • Altitude compensation provided by the XTC-100 takes place when the unit is activated.
XTC-100 NO DECOMPRESSION LIMITS Note how the No Decompression Limits for the XTC-100 are contrasted with the U.S. Navy limits (Fig. 77). For most depths, the XTC-100 provides somewhat less no decompression times than the U.S. Navy Tables. However, while the No Decompression Limits may be less, you will receive greatly increased allowable bottom times as you take advantage of the multilevel dive capabilities offered by the XTC-100.
® OXYGEN EXPOSURE LIMITS Maximum Exposure Time PO2 Per Dive Per 24hr (Min.) (ATA) (Min.) 0.60 0.70 0.80 0.90 1.00 1.10 1.20 1.30 1.40 1.50 1.60 720 570 450 360 300 240 210 180 150 120 45 720 570 450 360 300 270 240 210 180 180 150 Fig. 78 - Oxygen Exposure Limits 78 Predicted exposure limits and oxygen calculations of the XTC-100 are based on maximum exposure durations (Fig. 78) published by the National Oceanic and Atmospheric Administration in the October 1991 NOAA Diving Manual.
XTC-100 Display Seen by the Diver Tissue Half-Times etc. 160 120 80 40 20 Tissue Half-Times 40 8^ etc. 3 4 5 6 No. of Segments 7 8 Fig. 79 - Tissue Compartment Control Display Seen by the Diver 20 8v 8 No. of Segments Fig.
® SPECIFICATIONS NO DECOMPRESSION MODEL OPERATIONAL MODES Basis: • Modified Haldanean Algorithm • 12 tissue compartments • Activation/Diagnostic • Surface • Temperature/Date/Time • FO2 Set Point • Pre Dive Planning Sequence • Time to Fly/Desaturate • Dive Log (Date/Nitrogen/Oxygen) • Set • Hour, Minute • Alternate (On/Off) • Sampling Rate • Audible Alarm (On/Off) • Units (Imperial/Metric) • Depth Alarm Value • FO2 Default (On/Off) • Year, Month, Day • External Access (EA) - download • Hour Format (12/24
XTC-100 SPECIFICATIONS (continued) DISPLAY RANGE/RESOLUTION GRAPHIC DIVER INTERFACE Numeric Displays: • Dive Number • Depth • Maximum Depth • FO2 Set Point • PO2 Value • Dive Time Remaining • Total Ascent Time • Decompression Stop Time • Elapsed Dive Time • Surface Time • Dive Log Surface Interval • Time to Fly Tissue Loading Bar Graph (TLBG): No Decompression zone (green) No Deco Caution zone (yellow) Decompression Warning zone (red) • Time to Desaturate • Temperature Range: Resolution: 0-9 1 0 - 330
® SPECIFICATIONS (continued) OPERATIONAL PERFORMANCE Function: • Depth • Timers Accuracy: ± 1% of full scale 1 second per day Dive Counter: • Displays Dives #1, 2, 3, 4, 5, 6, 7, 8, 9, 0 (continues #1 to #0) • Displays #0 for dives #10, 20, etc.
XTC-100 GLOSSARY Air - A breathing gas that contains approximately 21% oxygen and 79% nitrogen (nature's common nitrogen - oxygen mixture). Air Dive - A dive conducted using air (approximately 21% oxygen & 79% nitrogen) as the breathing gas. Algorithm - A step-by-step mathematical formula designed to accomplish a particular result (i.e. Dive Time Remaining in the XTC-100). Altitude Dive - A dive made at an elevation above sea level (2,000+ ft. / 610+ m.
® GLOSSARY (continued) depth display. Diagnostic Mode - The first display seen on dive computers after initial activation during which time a self–check for internal faults is performed. Display - A visual readout of information. Dive Log Mode - A computer display of previous dive information. Dive Time Remaining - A display of the time before a diver must surface based on no-decompression status, or oxygen accumulation status.
XTC-100 GLOSSARY (continued) OceanLog™ - An Oceanic name for a PC interface hardware/software package. OTU - Abbreviation for oxygen tolerance unit. A Hamilton's Repex method term for oxygen dose. Out of Range - The point at which a dive computer can no longer supply correct dive information. Oxygen Tolerance - Dose or exposure to the physiological affects of elevated levels of oxygen. Oxygen Toxicity - The adverse physiological affects of exposure to elevated levels of oxygen.
® __________________________ Date of purchase __________________________ Purchased from RESP AS A RESPONSIBLE DIVER I UNDERSTAND AND ASSUME THE RISKS I MAY ENCOUNTER WHILE DIVING.
XTC-100 a. b. c. d. e. f. g. h. i. j. k. l. m. n.
OCEANIC USA 2002 Davis Street San Leandro, Ca. 94577 USA Phone: 510/562-0500 Fax: 510/569-5404 Web: http://www.oceanicusa.com © 2002 Design 1999 Green Button Model Doc. No.
