Sherwood Amphos Manual

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AMPHOS DC MANUAL

AMPHOS

DIVE COMPUTER MANUAL

Doc. No. 12-5301-r01 (12/17/12)

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Summary of Contents for Sherwood Amphos

Page 2: Table Of Contents
AMPHOS DC MANUAL CONTENTS NOTICES, WARRANTY, MODEL ............3 NORM PLAN MODE ...............21 GLOSSARY...................4 FLY MODE ..................21 DISPLAY ICONS, ABBREVIATIONS & TERMS ........5 DESAT MODE .................22 NORM/GAUG LOG MODE .............22 FEATURES & DISPLAYS ..............6 HISTORY MODE ................23 CONTROL BUTTONS ..............7 OPERATING MODE STRUCTURE ..........7 NORM DIVE MODES ................24...
Page 3: Notices, Warranty, Model
AMPHOS. Modifications or repair by anyone other than a Sherwood Sales and Service Center authorized to service the AMPHOS will void the warranty. Sherwood Scuba will not be responsible for recovery or replacement of the product in the event of loss or theft. Sher- wood Scuba, its distributors, and retailers make no warranties, either expressed or implied, with respect to this product or its owner’s manual except those...
Page 4: Glossary
Multi-level Dive - A type of dive profile where the diver spends various times at different depths (opposite of a “Square Wave” dive profile). Nitrogen Bar Graph - A graphic display of simulated nitrogen absorption on Sherwood dive computers. Nitrox - A nitrogen-oxygen breathing gas mixture that contains a higher fraction of oxygen than air.
Page 5: Display Icons, Abbreviations & Terms
AMPHOS DC MANUAL DISPLAY ICONS Daily AL On Depth/Time Time id is for Stop Surface Interval Depth id go Down Total Ascent Time go Up value is Max Depth value is FO2 value is PO2 Gas # Time value a Gas is Nitrox...
Page 7: Control Buttons
Mode, activate a sequence, or for 2 minutes if no button is pressed. The Chronograph remains on display as long as it is running unless another Mode is accessed. When Wet Activation is set On, the AMPHOS will enter the selected Dive Mode upon descent to 5 FT (feet)/1.5 M (meters) for 5 Fig. 1 - WATCH MAIN TIME seconds, regardless of what operating mode it is in.
Page 8: Backlight
• The oxygen features of the AMPHOS are intended for use by recreational divers trained for Nitrox diving by an instructor certified by a recognized training agency to teach diving with Nitrox.
Page 9: Watch Features & Displays
AMPHOS DC MANUAL WATCH FEATURES & DISPLAYS © 2002 Design, 2012 Doc. No. 12-5301-r01 (12/17/12)
Page 10: Local Default Time
> Set items include Date Format, Hour Format, Time, and Date > Day of the Week is set automatically when the Date is set. > When the AMPHOS is operating in Dive Computer mode, Date is displayed only to identify dives when they are accessed in the Log Mode •...
Page 11: Set Time
AMPHOS DC MANUAL Set Time The Set Time screen displays the graphics SEt and TIME with the Time of Day (hr:min) with the Hour digits flashing (Fig. 11). The graphic P is displayed when PM, no graphic if AM or 24 Hour Format.
Page 12: Set Cdt
AMPHOS DC MANUAL Set CDT, information includes (Fig. 17): > Graphic SEt with last Time (hr:min) set, Hour digits flashing. > Graphic CDT. • S (press/hold) will scroll upward through the Hour Set Points in 1 hour increments at a rate of 8 per second.
Page 13: Dive Computer Features & Displays
AMPHOS DC MANUAL DIVE COMPUTER FEATURES & DISPLAYS © 2002 Design, 2012 Doc. No. 12-5301-r01 (12/17/12)
Page 14: Bar Graphs
AMPHOS DC MANUAL BAR GRAPHS The AMPHOS features 2 bar graphs, one on each side of the LCD. • The one on the left (Fig. 23a) is dual function. It represents either Nitrogen loading or Oxygen accumulation. The icons N2 and O2 identify which is displayed at that time.
Page 15: Dive Computer Surface Modes
AMPHOS DC MANUAL DIVE COMPUTER SURFACE MODES © 2002 Design, 2012 Doc. No. 12-5301-r01 (12/17/12)
Page 16: Operating Modes
AMPHOS is operating in at the time of the descent. The AMPHOS will enter post dive Surface Mode upon ascent to 2 FT (0.6 M) for 1 second. The Surface Interval Time colon will flash during the first 10 minutes after a NORM or GAUG dive, or 1 minute after a FREE dive.
Page 17: Norm/Gaug Set Modes
MODs affected by the PO2 limit set will not be displayed when FO2 for Gas 1 is set to AIR. Internally, the AMPHOS keeps track of the O2 so that if FO2 for Gas 1 is subsequently set for a numerical value, the O2 accu- mulated during previous AIR dives will be accounted for in the next Nitrox dive (during that dive period and series of repetitive dives).
Page 18: Set Fo2 50% Default
• M (2 sec), or if no button is pressed within 2 minutes, operation will revert to the Surface Main. * The AMPHOS is programmed to prevent FO2 for Gas 2 from being set at a value lower than the FO2 set for Gas 1. When setting FO2 for Gas 2, the lowest value available will be the Set Point of Gas 1.
Page 19: Set Nibg Alarm
AMPHOS DC MANUAL SET NIBG ALARM, information includes (Fig. 43): > Graphic ON (or OFF), flashing. > Bar graph segments with N2 icon. > Graphic NIBG. • S ( < 2 sec) will step through the selections OFF, ON, and SEt.
Page 20: Set Norm Deep Stop
AMPHOS DC MANUAL SET NORM DEEP STOP, information includes (Fig. 49): > Graphic OFF (or ON) flashing. > Graphics dEEP STOP. • S (< 2 sec) will toggle between OFF and ON. • A (< 2 sec) will save the setting and access Set Safety Stop.
Page 21: Serial Number
Fig. 54 - SERIAL NUMBER (view only) The Serial Number and Firmware Revision will be requested in the event that you contact Sherwood regarding the AMPHOS. Enter them in the Records section provided in the back of this Manual. NORM PLAN MODE Sherwood strongly recommends that you review the Plan Mode prior to every NORM dive to help you plan your dive as required to avoid exceeding no decompression or oxygen exposure limits.
Page 22: Desat Mode
AMPHOS DC MANUAL DESAT MODE (NORM only) The Time to Desaturate counter provides calculated time for Tissue Desaturation at sea level taking into consideration the Conser- vation Factor setting. It begins counting down 10 minutes after surfacing from a dive, counting down from 23:50 (hr:min) max to 0:00.
Page 23: History Mode
• L (press) will activate the Backlight. NOTE: FREE Dives are not recorded in the viewable Log or History. The data is stored in memory which can be downloaded to the Sherwood PC Interface program. Fig. 65 - HISTORY 2 ©...
Page 25: Dive Time Remaining (Dtr)
5 FT (1.5 M) for 5 seconds. When the Wet Activation feature is set OFF, the AMPHOS will not enter Dive Mode upon descent unless it is operating in one of the NORM Dive Computer modes (menus) at that time. Modes such as Surface Mode, Plan, Fly, etc.
Page 26: No Deco Deep Stop
AMPHOS DC MANUAL NORM NO DECO ALT 2, information includes (Fig. 71) - > PO2 (x.xx ATA) with PO2 icon. > FO2 setting for Gas in use with FO2 and NX icons. > Gas (tank) icon, one in use (1 or 2) >...
Page 28: Decompression
AMPHOS DC MANUAL DECOMPRESSION Decompression mode activates when theoretical No Decompression time and depth limits (NDLs) are exceeded. Upon Entry into Deco, the Audible will sound until acknowledged or time out of 10 seconds. While it is sounding, the UP Arrow icon and graphic DECO will flash to alert you.
Page 29: Delayed Violation 1 (Dv1)
AMPHOS DC MANUAL Upon entry into the following Violation modes, the Alarm will sound, even if set Off. When these events occur, the Alarm cannot be acknowledged (silenced) by pressing S. DELAYED VIOLATION 1 (DV1) If you surface during the 5 minute CV or remain above a required Deco Stop Depth for more than 5 minutes, the audible will sound during which the full NIBG will flash.
Page 30: Violation Gauge Mode (Vgm)
• S (< 2 sec) to acknowledge/silence other alarms. • L (press) to activate Backlight. The AMPHOS will also enter VGM 5 minutes surfacing from a dive in which a Delayed Violation (1, 2, or 3), or 100% O2 condi- tion occurred.
Page 31: High O2
• Do not plan any dive that exceeds your training or experience level. • Inspect your AMPHOS before every dive. If it shows any signs of damage or abnormal function, DO NOT dive with it until it has received factory prescribed service.
Page 33: Switching (Norm)
SWITCHING (NORM) During NORM Dives, the AMPHOS can be manually switched from Gas 1 to Gas 2, changing FO2 displays and calculations. Every dive begins with Gas 1, and 10 minutes after surfacing from a multiple gas dive, operation defaults to the Gas 1 FO2.
Page 34: Gauge Operating Mode
OPERATING MODE NOTE: Once a dive is made in Digital Gauge Mode, you must wait 24 contiguous hours after surfacing before the AMPHOS resets and will operate as an Air or Nitrox dive computer in NORM Mode or FREE Dive Mode.
Page 35: Surf Main
AMPHOS DC MANUAL DIGITAL GAUGE MODE When Digital Gauge Mode (GAUG) is selected as the operating mode, the AMPHOS will operate as a Digital Depth Gauge/ Timer without performing nitrogen and oxygen calculations. • M (2 sec), while the NORM SURF Main is displayed, will access GAUG SURF Main.
Page 36: Free Dive Operating Mode
AMPHOS DC MANUAL FREE DIVE OPERATING MODE FREE Mode uses the NORM/GAUG settings for >> Time/Date, Wet Activation, Units, Conservative Factor, and Backlight Duration. © 2002 Design, 2012 Doc. No. 12-5301-r01 (12/17/12)
Page 37: Surf Main
AMPHOS DC MANUAL FREE DIVE MODE When Free Dive Mode is selected, nitrogen loading is calculated based on a default FO2 of Air. The amount of nitrogen remain- ing during 24 hours is carried over between FREE and NORM operating modes.
Page 38: Free Elapsed Dive Time (Edt) Alarm
AMPHOS DC MANUAL FREE ELAPSED DIVE TIME (EDT) ALARM The Free EDT Alarm is factory set for 30 seconds. When set On, the audible will sound 3 short beeps and the graphic EDT and Time digits will flash every 30 seconds.
Page 39: Free Dive Alarms
AMPHOS DC MANUAL FREE DIVE ALT 2, information includes (Fig. 108) - > Max Depth with MAX and FT (or M) icons. > Time of Day (hr:min). • A (< 2 sec) to revert to the Main, or after 5 seconds if A is not pressed.
Page 40 The mathematical model currently used in the AMPHOS is based on no decompression/decompression multilevel repetitive dive schedules. This algorithm does not take into account the physiological changes associated with the high pressures that competitive type Free diving can expose a diver to.
Page 42: Care And Cleaning
Instrument Lens Protector. Small scratches will naturally disappear underwater. • Soak and rinse the AMPHOS in fresh water at the end of each day of diving, and check to ensure that the areas around the Low Pressure (Depth) Sensor (Fig. 114a), PC Interface Data Port (Fig. 114b), and Buttons are free of debris or obstructions.
Page 43: Altitude Sensing And Adjustment
• Verify all Set Points prior to diving. • If any portions of the display are missing or appear dim, or if a Low Battery condition is indicated, return your AMPHOS to an Authorized Sherwood Dealer for a complete evaluation before attempting to use it.
Page 44: Error (Reset During A Dive)
AMPHOS DC MANUAL ERROR (RESET DURING A DIVE) If for any reason, the AMPHOS shuts Off then turns On again for any reason during any Dive, the message ERR (Error) will be displayed with the Up Arrow and current Depth.
Page 45: Specifications
AMPHOS DC MANUAL SPECIFICATIONS CAN BE USED AS • Watch • Air Computer • Nitrox Computer • Digital Depth Gauge/Timer • Free Dive Depth Gauge/Timer NO DECOMPRESSION MODEL Basis: • Modified Haldanean Algorithm • 12 tissue compartments Data Base: • Diving Science and Technology (DSAT) - Rogers/Powell Performance: •...
Page 46 AMPHOS DC MANUAL SPECIFICATIONS (CONTINUED) • Set U Group (Utilities): • Wet Activation (Off/On) • Units of Measure (Imperial/Metric) • No Deco Deep Stop (Off/On) • No Deco Safety Stop (Off/On) • Conservative Factor (Off/On) • Backlight Duration (Off, 5, 10 sec) •...
Page 47 AMPHOS DC MANUAL SPECIFICATIONS (CONTINUED) OPERATIONAL PERFORMANCE Function: Accuracy: • Depth ±1% of full scale • Timers 1 second per day Dive Counter: • NORM/GAUG displays Dives #1 to 24. • FREE displays #1 to 99 (0 if no dive made yet).
Page 48 AMPHOS DC MANUAL NO DECOMPRESSION LIMITS AT ALTITUDE (IMPERIAL) Altitude> 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 Depth 4:20 4:20 3:35 3:21 3:07 2:55 2:45 2:36 2:28 2:21 2:15 2:10 2:04 1:58 2:17 2:17...
Page 49: Inspection/Service Record
Service Performed Dealer/Technician WARNING: If your AMPHOS stops working for any reason while operating as a Dive Computer, it is important that you have anticipated this possibility and are prepared for it. This is an important reason for not pushing the no decompression and oxygen exposure limits, and a critical reason to avoid entering decompression.

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