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Sherwood Wisdom 3 Manual

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Wisdom 3 DC Manual
© 2002 Design, 2011 Doc. No. 12-5274-r01 (8/31/11)
PSI
FEET
TIME
DIVE
FEET
MAXIMUM
NITROX
O2
N2
SAFE
MINUTES
CNS
O2
DECO
N2
CNS
O2
DECO
N2
BAR GRAPHS
Nitrogen Bar Graph
The Nitrogen Bar Graph (Fig. 3a) represents tissue loading of nitrogen, showing your relative no decompres-
sion or decompression status.
As your depth and bottom time increase, segments will add to the Graph, and as you ascend to shallower
depths, the Bar Graph will begin to recede, indicating that additional no decompression time is allowed for
multilevel diving.
The Nitrogen Bar Graph monitors 12 different nitrogen compartments simultaneously and displays the one
that is in control of your dive. It is divided 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.
Oxygen Accumulation Bar Graph (O2BG)
The O2 Bar Graph (Fig. 4a) represents oxygen loading, your relative oxygen tolerance dosage (OTU), show-
ing the maximum of either per dive accumulated oxygen, or 24 hour period accumulated oxygen.
As your accumulation (% saturation) increases during a dive or 24 hour period, segments will add to the Bar
Graph, and as loading decreases, it will begin to recede, indicating that additional exposure is allowed.
NOTE: Displays associated with oxygen and the O2 Bar Graph will only appear if
FO2 has been set at a value other than 'Air' (e.g., a numerical value).
Variable Ascent Rate Indicator (ARI)
The Variable Ascent Rate Indicator (Fig. 4b) provides a visual representation of Ascent speed (i.e., an ascent
speedometer), 'normal' rate, a 'cautionary' rate, and 'Too Fast'.
The segments of the Variable Ascent Rate Indicator represent 2 sets of speeds which change at a reference
depth of 60 FT (18 M). Refer to the chart at the right for segment values.
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).
INFORMATIONAL DISPLAYS
Each numeric and graphic display represents a unique piece of information. It is imperative that you
understand the formats, ranges, and values of the information represented to avoid any possible misun-
derstanding that could result in error.
Tank Pressure Display
Tank pressure is displayed numerically as the largest digits (Fig. 5a). Values of pressure are displayed from 0
PSI (BAR) up to 5000 PSI (352 BAR) in increments of 5 PSI (.5 BAR).
Depth Displays
During a dive, the Current Depth display (Fig. 5b), indicates depths from 0 to 330 FT (99.9 M) in 1 FT (0.1
M) increments.
The Maximum Depth reached during that dive will also be displayed (Fig. 5c).
• When the unit is set to operate as a Digital Depth Gauge/Timer (referred to as Gauge Mode), the Depth
Display range is 'extended' to 399 FT (120 M).
• At depths greater than 99.9 M, it will indicate metric values in increments of 1 M.
Fig. 3 - Nitrogen BG
a
Fig. 4 - O2BG & ARI
a
b
Variable Ascent Rate Indicator
Deeper than 60 FT (18 M)
Segments Ascent Rate =
Displayed FPM MPM
0 0-20 0 - 6
1 21-30 6.5-9
2 31-40 9.5-12
3 41-50 12.5-15
4 51-60 15.5-18
5 >60 >18
60 FT (18 M) & Shallower
Segments Ascent Rate =
Displayed FPM MPM
0 0-10 0 - 3
1 11-15 3.5-4.5
2 16-20 5-6
3 21-25 6.5-7.5
4 26-30 8-9
5 >30 >9
Fig. 5 - Pressure & Depth
a
b
c
N
… 9 …


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