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14
AMPHOS DC MANUAL
© 2002 Design, 2012 Doc. No. 12-5301-r01 (12/17/12)
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.
Regardless of which parameter the Bar Graph is representing at the time,
nitrogen and oxygen calculations will continue to be performed in the background.
• The one on the right (Fig. 23b) represents Ascent Rate. It is referred to as the ASC (Ascent Rate Indicator).
NIBG (Nitrogen Bar Graph)
The NIBG represents tissue loading of nitrogen, showing your relative no decompression or decompression status. As your
depth and elapsed dive time increase, segments will add to the NIBG, and as you ascend to shallower depths, the segments will
recede, indicating that additional no decompression time is allowed for multilevel diving.
The NIBG monitors 12 different nitrogen compartments simultaneously and displays the one that is in control of your dive. It is di-
vided into a No Decompression (normal) zone, a Caution zone (also No Decompression), and a Decompression (danger) zone.
While you cannot provide a guarantee against the occurrence of decompression sickness, you may choose your own personal
zone of caution based upon age, physique, excessive weight, etc., to reduce the statistical risk.
NOTE: Information associated with oxygen and the O2BG will only be displayed when FO2 has been
set for Nitrox (e.g., a numerical value).
Oxygen Bar Graph (O2BG)
The O2BG represents oxygen accumulation, showing the maximum of either per dive accumulated oxygen, or 24 hour period
accumulated oxygen.
As your oxygen exposure (accumulation) increases during the dive, segments will add to the O2BG, and as saturation decreases,
it will begin to recede, indicating that additional exposure is allowed for that dive and 24 hour period.
Ascent Rate Indicator (ASC)
The ASC provides a visual representation of ascent speed (i.e., an ascent speedometer).
The segments of the ASC represent two sets of speeds that change at a reference Depth of 60 FT (18 M).
See chart at right.
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, ascent rates should not exceed 30 FPM (9 MPM).
ALPHA / NUMERIC DISPLAYS
Depth
During dives, the Current Depth display (Fig. 24a) and Maximum Depth which is on an Alternate Display (Fig. 25a) indicate
Depths from 0 to 330 FT (100 M) in increments of 1 FT (0.1 M).
No Deco Deep and Safety Stops, as well as Decompression Stops, display required Stop Depths.
Time and Date
Most Time displays like Time of Day (Fig. 25b) are shown in hour:minute format (i.e., 9:56 represents 9 hours and 56 minutes,
not 956 minutes!). The colon that separates hr:min (min;sec) blinks once per second when the display is indicating real time
(e.g., Time of Day).
Other times displayed include NDC (No Deco Time Remaining, Fig. 26a), and EDT (Elapsed Dive Time, Fig. 26b).
No Deco Stops and FREE Dive Mode times are displayed in minute:second format.
Temperature, Date, Elevation
Elevation, Date, and Temperature can be viewed by accessing the Watch Alternate Display (Fig. 27).
The only other place that Date is displayed is on Log Preview screens that identify dives (Fig. 28a).
When above the sea level range, which extends up to 3000 feet (915 meters), Altitude is displayed as EL (Elevation Level) from 2
up to 7.
EL2 = 3,01 to 5000 feet (916 to 1525 meters)
EL3 = 5001 to 7000 feet (1526 to 2135 meters)
EL4 = 7001 to 9000 feet (2136 to 2745 meters)
EL5 = 9001 to 11000 feet (2746 to 3355 meters)
EL6 = 11001 to 13000 feet (3356 to 3965 meters)
EL7 = 13001 to 14000 feet (3966 to 4270 meters)
Fig. 23 - BAR GRAPHS
a
ASC values
Deeper than 60 FT (18 M)
Segments Ascent Rate =
Displayed FPM MPM
0 0 - 20 0 - 6
1 21-50 6.5-15
2 51-60 15.5-18
3 >60 >18
60 FT (18 M) & Shallower
Segments Ascent Rate =
Displayed FPM MPM
0 0 - 10 0 - 3
1 11-25 3.5-7.5
2 26-30 8-9
3 >30 >9
b
Fig. 25 - MAX DEPTH, TIME
Fig. 24 - DEPTH
a
a
b
Fig. 27 - ELEV, DATE, TEMP
Fig. 26 - NDC, EDT
Fig. 28 - DATE
a
b
a