Sherwood Scuba AMPHOS AIR 2.0, Руководство пользователя

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AMPHOS AIR 2.0 DC MANUAL
© Pelagic, 2019 Doc. No. 12-79 3 9 -r01 (11/12/19 )
DIVE TIME REMAINING (DTR)
The AMPHOS AIR 2.0 constantly calculates No Deco Time Remaining (NDC), O2 Time Remaining (OTR), and Air Time Remaining (ATR), and
displays whichever one is the least amount available at the time as Dive Time Remaining (DTR).
No Deco Time Remaining (NDC)
NDC is the maximum amount of time that you can stay at your present Depth before entering Decompression. It is calculated based on the
amount of Nitrogen absorbed by hypothetical tissue compartments.
The rates each of these compartments absorb and release Nitrogen is mathematically modeled and compared against a maximum allowable
Nitrogen level.
Whichever one is closest to this maximum level is the controlling compartment for that Depth. Its resulting value will be displayed on the Dive
Main screen as minutes NDC time (Fig. 68a) and graphically as the NIBG (Fig. 68b).
As you ascend from Depth during a dive, the NIBG segments will recede as control shifts to slower compartments.
This is a feature of the Decompression model that is the basis for multilevel diving, one of the most important advantages that the AMPHOS
AIR 2.0 offers.
O2 Time Remaining (OTR)
When FO2 is set for a numerical value (Nitrox), the O2BG (Fig. 69a) will add segments to represent oxygen accumulation for that dive, or 24
hour period, whichever amount is greater.
When OTR becomes less than NDC, it is displayed as DTR on the Main Dive screen.
Air Time Remaining (ATR)
ATR is the time you can remain at your present Depth and still safely surface with the tank Pressure reserve that you selected during setup (the
End Pressure Alarm setting).
ATR (Fig. 70a) can be viewed when an Alternate display that can be accessed during dive modes.
The AMPHOS AIR 2.0 calculates ATR using a patented algorithm that is based on a diver's individual air consumption rate and current depth.
Tank Pressure is measured once each second and an average rate of consumption is calculated over a 60 second period. This rate of con-
sumption is then used in conjunction with a knowledge of the depth dependence to predict the air required for the diver to make a safe con-
trolled ascent including any Stops.
Air consumption and depth are continuously monitored and ATR reflects any change in circumstances. For example, when you suddenly find
yourself swimming against a strong current and begin breathing more rapidly, the AMPHOS AIR 2.0 will recognize the change and adjust the
ATR accordingly.
ATR Alarm
When ATR decreases to 5 minutes (Fig. 71a), the Audible will sound, and if it decreases to 0, the Audible will sound again with the message
ATR flashing (Fig. 72) until the Audible is silenced, the the time value will be displayed.
You should immediately initiate a controlled Ascent while monitoring your Tank Pressure. However, there is no reason to panic, the AMPHOS
AIR 2.0 has allowed for the Air necessary for a safe Ascent including the No Deco Deep and Safety Stops, if set On, and any Decompression
Stops required.
Example of ATR Alarm:
• You set the End Pressure Alarm for 300 PSI (20 BAR).
• You are at a Depth of 60 FT (20 M).
• Air Time Remaining decreases to 0.
• You Ascend at a maximum rate of 30 FPM (10 MPM).
• You surface with a minimum of 300 PSI (20 BAR) pressure still in your Tank.
ASCENT RATE INDICATOR (ASC)
The ASC shows how fast you are ascending. When you exceed the maximum recommended Ascent Rate for the depth you are at, the Audible
will sound during which time all segments of the ASC and the graphic SLOW will flash on the Dive Main screen (Fig. 73). The flashing will stop
and normal information will be restored when the audible is silenced or your Ascent Rate is slowed below the allowed rate.
The Ascent Rate alarm is based upon 2 sets of speeds which change at a reference depth of 60 FT (18 M). See page 13.
WARNING: At depths greater than 60 FT (18 M), ascent rates should not exceed 60 FPM (18 MPM). At depths of 60 FT
(18 M) and shallower, rates should not exceed 30 FPM (9 MPM).
Fig. 68 - DTR (NDC)
b
a
Fig. 69 - O2BG
a
Fig. 70 - ATR
a
Fig. 71 - ATR WARNING
(during audible)
Fig. 72 - ATR ALARM
(during audible)
Fig. 73 - ASCENT ALARM
a
a