1: WATER TYPE 23
2: UNITS 23
3: DEEP STOP 24
4: SAFETY STOP 24
5: ALGORITHM 24
6: CONSERVATIVE FACTOR 25
7: GLO (BACKLIGHT) DURATION 25
8: SAMPLE RATE 25
9: BLUETOOTH 26
SET TIME 26
SET MODE 27
HISTORY 27
SN (SERIAL NUMBER) 27
NORM DIVE MODE 28
INITIATING A DIVE 29
NO DECOMPRESSION DIVE MAIN 29
ALT 1 29
ALT 2 29
ALT 3 30
DEEP STOP PREVIEW 30
DEEP STOP MAIN 30
SAFETY STOP MAIN 30
SURFACING 31
DECOMPRESSION 32
DECOMPRESSION ENTRY 32
DECOMPRESSION STOP MAIN 32
CONDITIONAL VIOLATION 32
DELAYED VIOLATION 1 33
DELAYED VIOLATION 2 33
DELAYED VIOLATION 3 33
VIOLATION GAUGE MODE DURING A DIVE 34
VIOLATION GAUGE MODE ON THE SURFACE 34
HIGH PO
HIGH O2 SAT (OXYGEN SATURATION) 35
2
34
GAUGE MODE 37
ON THE SURFACE BEFORE A DIVE 38
GAUGE SURF MAIN MENU 38
INITIATING A DIVE 38
REFERENCE 39
UPLOADING/DOWNLOADING DATA 40
CARE AND CLEANING 40
INSPECTIONS AND SERVICE 40
BATTERY REPLACEMENT 40
ALTITUDE SENSING AND ADJUSTMENT 42
For details, refer to the Product Warranty Registration Card provided. Register on line at www.OceanicWorldwide.com
COPYRIGHT NOTICE
This operating manual 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 either Oceanic or Pelagic.
Oceanic, the Oceanic logo type, ProPlus 4.0, and the ProPlus 4.0 logo are registered and unregistered trademarks, trade names, and service marks
of Oceanic. The Graphic Diver Interface, Tissue Loading Bar Graph (TLBG), Pre-Dive Planning Sequence (PDPS), OceanLog, and Dual Algorithm are
all registered and unregistered trademarks, trade names, and service marks of Pelagic. All rights are reserved.
PATENT NOTICE
U.S. patents have been issued to protect design features of our products. The list of patents issued and pending are available at dive-patent.com.
DECOMPRESSION MODEL
The programs within the ProPlus 4.0 simulate the absorption of nitrogen into the body by using a mathematical model. This model is merely a way
to apply a limited set of data to a large range of experiences. The ProPlus 4.0 dive computer model is based upon the latest research and experiments in decompression theory. Still, using the ProPlus 4.0, just as using the U.S. Navy (or other) No Decompression Tables, is no guar-
antee of avoiding decompression sickness, i.e. “the bends.” Every diver’s physiology is different, and can even vary from day to day. No
machine can predict how your body will react to a particular dive prole.
The ProPlus 4.0 is an easy to use dive computer utilizing a two button interface. Divers may choose between either Dive or Gauge Mode. Though
the ProPlus 4.0 is easy to use, you will get the most out of your new ProPlus 4.0 if you take some time to familiarize yourself with its displays and
operation. Information has been organized into easy to follow sections to aid you in learning all you need to know. There is also a glossary at the
end of this guide for any terms that may sound unfamiliar to you.
ACTIVATION
To activate the ProPlus 4.0, press and release either button. The ProPlus 4.0 will also turn on if its metal contacts become wet and you descend
greater than 1.5 m (5 ft) for 5 seconds. The H2O ACT (water activation) feature may be disabled if that is your preference. Disabling the H2O ACT
feature is described in the Dive Surface Mode chapter, p. 26.
• Upon activation the unit will enter a Diagnostic Mode. The ProPlus 4.0 checks the display and voltage at this time to ensure that everything is
within tolerance.
• It will also check ambient barometric pressure, and calibrate present depth as 0 ft (m). When at 3001 ft (916 m), or higher, it will adjust depth for
the higher altitude.
• After the Diagnostic check, the ProPlus 4.0 will display the surface screen in Dive Mode.
NOTE: The ProPlus 4.0 has no off button or command. If no buttons are pressed or dives made within 10 minutes the computer
will enter Sleep Mode. The screen and Bluetooth (if set ON) shut down, to save battery life, while in Sleep Mode. To wake the
computer press any button. Additionally, the unit will completely shut itself off after 2 hours of inoperation. However, the ProPlus
4.0 will stay on, in Sleep Mode, for a 24 hour period after the dive, counting down FLY (time to fly) and SAT (desaturation time) if
a dive has been made.
1Depth ID (units)
2Low Battery
3Partial Pressure of Oxygen
4Gas Time Remaining
5Dive Number
6Bluetooth (on)
7Tissue Loading Bar Graph
8Log
9History
10Surface Time
11Time To Fly
12Oxygen Saturation
13Variable Ascent Rate Indicator
14Algorithm
15Gas #
16Value is Maximum
17Safety Stop
18Descend, Ascend, or Stop
19Deep Stop
20Time To Surface
21Temperature
22Saturation
23Fraction of Oxygen
24Dive Time
25Value is Pressure
The ProPlus 4.0 utilizes 2 control buttons called the ADV (Advance) and SEL (Select) buttons. They allow you to select
mode options and access specic information. They are also used to enter settings, activate the backlight, and acknowledge the audible alarm. Throughout this manual they will be referred to as the ADV and SEL buttons.
Pressing different combinations of these buttons will navigate through different menus and options of the ProPlus 4.0. The
symbols in the table below will illustrate how to proceed through the menus.
The ProPlus 4.0 constantly monitors No Decompression status and O2 Accumulation, and will display whichever time is the least amount available
as DTR on the No Decompression Dive Main screen. The time being displayed will be identied by the NO DECO (no decompression) min or O2
(Oxygen Time Remaining) min icons.
NO DECOMPRESSION
No Decompression 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 compartment is closest to this maximum level is the controlling compartment for that depth. Its resulting value NO DECO (no decompression) will be displayed. It will also be displayed graphically as the Tissue Loading Bar Graph, see Bar Graphs later in this section.
As you ascend, the Tissue Loading Bar Graph 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 Oceanic dive computers offer.
DTR is
No Decompression
O2 MIN (OXYGEN TIME REMAINING)
When set for nitrox operation, O2 SAT (Oxygen Saturation) during a dive is displayed on an ALT screen as a percentage of allowed saturation
identied by the O2 SAT icon. The limit for O2 SAT (100%) is set at 300 OTU (Oxygen Tolerance Units) per dive or 24 hour period. See the chart at
the back of this manual for specic times and allowances. O2 SAT and O2 MIN values are inversely related; as the O2 SAT value increases the O2
MIN value decreases.
When the O2 MIN value becomes less than the No Decompression calculations for the dive, DTR (Dive Time Remaining) will be controlled by O2
SAT and the O2 MIN value will be displayed as the DTR on the Dive Main screen, identied by the O2 MIN icon.
ALT 3DIVE MAIN
% O2 Saturation
DTR is O2 MIN
BAR GRAPHS
The ProPlus 4.0 features two specic bar graphs.
1. The one on the left represents nitrogen loading. It is referred to as TLBG (Tissue Loading Bar Graph).
2. The one on the right represents ascent rate. It is referred to as the VARI (Variable Ascent Rate Indicator) Bar Graph.
The VARI (Variable Ascent Rate Indicator) Bar Graph provides a visual representation of ascent speed (i.e., an ascent speedometer). When the
ascent is faster than the recommended 30 fpm (9 mpm), the bar graph will ash red until the ascent is slowed.
# OF SEGMENTS ASCENT RATE,
VARI Triggered
FPM (MPM)
00 - 10 (0 - 3)
111 - 15 (3.1 - 4.5)
216 - 20 (4.6 - 6)
321 - 25 (6.1 - 7.5)
426 - 30 (7.6 - 9)
5> 30 (> 9)
ashing
TISSUE LOADING BAR GRAPH
The Tissue Loading Bar Graph represents your relative No Decompression or Decompression status. The rst four segments represent No Decompression status and the fth indicates a Decompression condition. As your Depth and Elapsed Dive Time increase segments are added. As you ascend
segments recede, indicating that additional No Deco (decompression) time is available. The ProPlus 4.0 monitors twelve different nitrogen compartments simultaneously and the N2 Bar Graph displays the one that is in control of your dive at any given time.
DUAL ALGORITHM®
The ProPlus 4.0 is congured with 2 algorithms which allows you to choose which set of NDLs (No Decompression Limits) will be used for nitrogen/
oxygen calculations and displays relating to Plan Mode and DTR (Dive Time Remaining) for NORM dives.
You can select DSAT or Z+ prior to new dives. Also, the selection can be changed after dives once Desaturation Time decreases to 0:00, otherwise
the selection will lock in for 24 hours after the last dive.
DSAT was the original standard used by Oceanic in all of its dive computers until the dual function was implemented several years ago. It features
NDLs that are based on exposures and test data which also formed validation for the PADI RDP. It imposes restrictions for repetitive Decompression
dives which are considered more risky than general No Deco dives.
Z+ (the Pelagic Z+ algorithm) performance is based on Buhlmann ZHL-16c. It features NDLs that are considerably more conservative than the DSAT
version especially at shallower depths.
To create even greater margins of safety with respect to decompression, a Conservative Factor as well as Deep and Safety Stops are available and
can be activated for NORM No Decompression dives.
CONSERVATIVE FACTOR
When the CF (Conservative Factor) is set On, the dive time remaining, No Decompression/Oxygen Time Remaining, which are based on the algorithm and used for N2/O2 calculations and displays relating to Plan Mode, will be reduced to the values available at the altitude level that is 3,000 ft
(915 m) higher than the actual altitude at activation. Refer to the charts in the back of this manual for dive times.
DEEP STOP
When the DS (Deep Stop) selection is set ON, it will trigger after descending deeper than 80 ft (24 m). The ProPlus 4.0 then calculates (continually
updating) a Stop Depth equal to ½ the Max Depth.
NOTE: The Deep Stop feature only works in Norm mode while within No Decompression times.
• While 10 ft (3 m) deeper than the calculated Deep Stop, you will be able to access a Deep Stop Preview screen that will display the current calcu-
lated Deep Stop Depth/Time.
• Upon initial ascent to within 10 ft (3 m) below the calculated Stop Depth, a Deep Stop screen displaying a Stop Depth at ½ the Max Depth will
appear with a countdown timer beginning at 2:00 (min:sec) and counting down to 0:00. If you descend 10 ft (3 m) below, or ascend 10 ft (3 m)
above, the calculated Stop Depth for 10 seconds during the countdown, the No Decompression Main will replace the Deep Stop Main display
and the Deep Stop feature will be disabled for the remainder of that dive. There is no penalty if the Deep Stop is ignored.
• In the event that you enter Decompression, exceed 190 ft (57 m), or a High O2 SAT (Oxygen Saturation) condition, ≥ 80%, occurs, the Deep
Stop will be disabled for the remainder of that dive.
• The Deep Stop is disabled during a High PO2 Alarm condition, ≥ set point.
Upon ascent to within 5 ft (1.5 m) deeper than the SS (Safety Stop) depth set for 1 second, on a No Decompression dive in which depth exceeded
30 ft (9 m) for 1 second, a beep will sound and a Safety Stop at the depth set will appear on the Dive Main display with a countdown beginning at
the Safety Stop time set and counting down to 0:00.
• If the Safety Stop was set for OFF, the display will not appear.
• In the event that you descend 10 ft (3 m) deeper than the Stop Depth for 10 seconds during the countdown, or the countdown reaches 0:00, the
No Decompression Main screen will replace the Safety Stop Main screen which will reappear upon ascent to within 5 ft (1.5 m) deeper than the
Safety Stop depth set for 1 second.
• In the event that you enter Decompression during the dive, complete the Decompression obligation, then descend below 30 ft (9 m); the Safety
Stop Main will appear again upon ascent to within 5 ft (1.5 m) deeper than the Safety Stop depth set for 1 second.
• If you ascend to 3 ft (0.9 m) of the surface for 1 second, the Safety Stop will be canceled for the remainder of that dive.
• There is no penalty if you surface prior to completing the Safety Stop or choose to ignore it.
LOW BATTERY
WARNING: DO NOT dive with a low battery. Charge the battery before diving if your ProPlus 4.0 indicates the Battery Low
Warning or Alarm.
Warning Level
• The ProPlus 4.0 functions continue but the backlight and Bluetooth are disabled.
• The battery icon appears solid.
Alarm Level
• The ProPlus 4.0 functions continue but the backlight and Bluetooth are disabled.
• When the voltage is below that required for normal operation (< 2.50 volts), the graphics "CHG BATT" shall ash and the Battery icon shall ash
once per second for 5 seconds, then the unit is to shut off.
While operating in Norm or Gauge mode, the audible alarm will emit 1 beep per second for 10 seconds when alarms strike. During that time, the
audible alarm can be acknowledged and silenced by pressing the UP button.
The audible alarms will not be active if the audible alarm is set to OFF (a Set Alarms setting).
The following situations shall activate the Alarm (1 beep per sec for 10 sec):
• Conditional Violation.
• Delayed Violations 1, 2, 3.
• Ascent Rate too fast, full bar graph.
• PO2 increases to .20 < Alarm Set Point and at the Alarm Set Point.
• Depth Alarm.
• Tissue Loading Bar Graph Alarm.
• O2 Sat at 80% and 100%.
• Entry into Decompression.
• Elapsed Dive Time Alarm.
• Dive Time Remaining Alarm.
• Gas Time Remaining decreases to 5 minutes and again at 0 minutes.
• Turn Pressure Alarm.
• End Pressure Alarm.
• Gas Switch would expose the diver to PO2 > 1.60 ATA.
The following situations shall activate the 3 short beep Alarm: