DELTA P VR3 Manuel utilisateur

OperatorsManual

Warning!

Failure to read and understand this instruction manual in full may result

in mis-use of the equipment, injury or even death.

Multi gas, multi mode

decompression computer

Software Upgrades

Visit www.vr3.co.uk for information on recent

software upgrades which may supersede

certain sections of this manual

Warning!

The is an aid to air and mixed gas open and

closed circuit diving. When undertaking any form of diving,

divers should always carry backup tables and depth/time

instrumentation in case of equipment failure.

VR3

Cover image photo © Leigh Bishop

Please check

for updates to

this manual on our

website at

www.vr3.co.uk

Want to know how to install your PIN (s)? See Page 33, (Pin Num screen)

It is highly recommended that you take the time to read this manual cover to cover. This

will give you an insight on the philosophy behind VR dive computers and enable you to

more easily locate advice on specific features and functions when you require it.

introduction..............................................................................................06

power system...........................................................................................06

changing the battery.................................................................................07

basic functions...........................................................................................08

decompression algorithm..........................................................................09

VPM based optional deco algorithm........................................................09

user interaction...........................................................................................10

pc link...........................................................................................10

battery compartment................................................................................10

control switches...........................................................................................11

power up..................................................................................................12

time change screen...................................................................................13

home screen.......................................................................................14-15

the menus............................................................................................16-41

dive modes menu................................................................................16-18

XFunc.......................................................................................................16

XDec.........................................................................................................17

big graphics (bg) mode............................................................................17

light..........................................................................................................18

stops..........................................................................................................18

options menu......................................................................................19-33

profile.......................................................................................................20

contents

gas list screen......................................................................................20-21

log screen............................................................................................21-22

markers....................................................................................................22

calendar..............................................................................................23-24

setup screen (including Color Screen adjustment).............................25-27

no stop screen.....................................................................................27-28

fly time screen.............................................................................................28

pc link screen.............................................................................................29

dive plan screen.............................................................................................30

language...................................................................................................31

altitude......................................................................................................31

games......................................................................................................32

pin number screen........................................................................................33

gas list menu.......................................................................................34-41

selecting gases........................................................................................34

adjusting gases........................................................................................35

activating gases........................................................................................36

changing gases....................................................................................37-38

selecting closed circuit gases....................................................................39

moving from closed to open circuit............................................................40

changing diluent.............................................................................................41

dive mode and simulate mode.............................................................42-50

contents

diver on the line.............................................................................................45

graphics...................................................................................................45

command area.....................................................................................46-47

closed circuit dive screens...................................................................48

warnings..................................................................................................49

decompression stop violation......................................................................50

switch.......................................................................................................50

air break...................................................................................................50

rebreather and analyser links..............................................................51-61

calibration with analyser (open circuit VR3)........................................51-52

calibration with analyser (closed circuit VR3)......................................53-54

analysing a gas........................................................................................55

semi closed rebreather link......................................................................56

closed circuit rebreather link...............................................................57-61

calibration at altitude................................................................................61

oxygen sensors........................................................................................62

gas calculator mode.................................................................................63

key to icons..............................................................................................64

warranty and service................................................................................65

maintenance tips for your VR3 and VR2..................................................66

specifications............................................................................................67

registration and warranty form..................................................................67

power system

introduction

The VR3 is designed as anair /nitrox / trimix, multi-mode decompression

computer. It can be purchased in four configurations.

Open Circuit Air/Nitrox

Open and Closed Circuit Air/Nitrox

Open Circuit Air/Nitrox/Trimix

Open and Closed Circuit Air/Nitrox/Trimix

In Open Circuit mode with the I/O connector activated and the cable linked

to an external oxygen cell located within a semi-closed circuit rebreather,

a VR computer will read semi-closed circuit decompression.

The VR3 is designed to integrate with our custom dive logging system.

It is also fully user programmable by PIN (see page 33) should you

choose to upgrade from one configuration to another or as more new

accessories or features are introduced.

VR3suse 1 xAA disposable battery. Alkaline, Lithium or Lithium Manganese

batteries between 1.5 and 3.6v can be used. Use of any other battery will

damage the unit and will invalidate the warranty.

The battery must be inserted with the + end entering the unit first.

Check the battery spring is in the cap before inserting battery.

The battery life is highly dependent on the operating mode of the active

backlight (see pages 18 and 26). Without lighting, the unit will work

continuously for approximately 100 hours diving. If the unit is turned off

(‘sleep’ mode), the battery keeps the internal systems going for 1 year.

Every week of “sleep mode” reduces the available dive hours by approximately

2 hours. These figures are approximate based on an ambient temperature

of 20°C, a 1.6V alkaline battery and a VR with a monochrome screen.

Battery voltage is displayed on the front and main screens. A " Battery

Low ” warning will show at 1.1V with a standard alkaline battery.

Lithium batteries have a faster discharge curve than standard cells and

although they last longer, they discharge quickly towards the end of their

life. When a lithium battery's voltage begins to drop quickly, change it.

Units are shipped with the battery installed. It is recommended that a battery

is left in at all times, unless you intend to store the unit for more than three

When changing the battery ensure the VR3 is switched off (blank screen).

Whenever possible change the battery before the existing one goes flat. If

the battery is allowed to go flat then all stored data such as the gas list and

logbook will be lost.

Before replacing the battery, it is good practice to turn the unit on and then let

it turn itself off so that you have as much time as possible to change it.

You have 30 seconds to remove and replace a battery. If you take longer

than this, the VR computer may reset itself and you may lose your time, date,

gaslist and dive log settings. Be especially vigilant if changing the battery

during a series of dives as areset will cause residual tissue

saturation data to be lost.

When changing the battery, if the VR3 appears to “lock” in a screen,

simply leave it for three minutes (with the battery in) and it will reset.

If the battery goes completely flat, or if on changing the battery the screen

appears to freeze, put a new battery in and screw in the cap until the screen

flashes on. Stop screwing in the cap and allow the unit to turn on and go

into the start up screen. After a short time it will turn off ( the backup

battery is now charged) and you may continue screwing in the cap.

changing the battery

months. When you start diving again and install a new battery, you will

need to reset your gas list and set up data.

The VR3 has the following basic functions:

Time and date.

Light mode (various light functions).

Programmable safety factor.

Metric or imperial use.

PC Link for uploading and downloading of setup and dive data.

On screen logbook of 100 dives.

Time to fly information.

Open and closed circuit modes.

Open circuit bailout option from closed circuit dives.

Gas switches programmable above and below water.

PO2, decompression violation, air break and ascent rate warnings.

List of all decompression stops.

Total time to surface display.

CNS and OTU tracking.

Temperature reading.

basic functions

The VR3 uses a derivative of the Buhlmann ZHL 16 algorithm. Exactly the

same adaptation is used in the Proplanner decompression software.

The new versions of both systems employ some of the latest thinking in

practical microbubble avoidance. This may seem to modify the dive profile

compared with standard parallel compartment models. The modification

takes the form of deepwater microbubble controlling decompression stops.

In certain circumstances the VR3 will prompt you to do a short decompression

stop, or stops, well below the bulk of the decompression sequence. Along

with the other modifications to the remaining profile, this helps to reduce

the problems associated with potential microbubble growth.

On all decompression dives, the VR3 will prompt for deep-water micro

bubble controlling stops of 2 minutes in duration. Deep-water

(microbubble) stops are recognised by their duration (normally two

minutes) and a + next to the time. It is vital that microbubble stops are

conducted correctly for a safe decompression.

Should a microbubble stop be missed, a “use table” message will

appear. The decompression displayed, although very close to the

required duration, may be in error. If this occurs consult backup tables

and add additional safety stops as required. While continued diving is

possible on the VR3, the decompression displayed may not be exactly

that required. “Use tables” will show for 24 hours.

decompression algorithm

In late 2005 a new option, the V1 upgrade, was released to give VR owners a

choice between the standard VR decompression algorithm AND a new

algorithm incorporating a variable permeability model. There is a V1 upgrade

path for all VR computers although for older models a hardware change is also

required, (see www.vr3.co.uk for full information.) Owners of Version 5.0

VR3s and VR2s can upgrade to V1 simply by purchasing and installing a PIN.

Depending on gas selection and dive depth and time, the VPM based option

will in some cases provide a reduced decompression requirement, although this

is not always true. What the new algorithm does is smooth out the profile.

There are no deep micro-bubble stops and ‘normal’ decompression stops begin

much deeper. In general, intermediate stops are longer and shallower stops are

shorter. Once V1 is enabled, divers can switch to the algorithm they prefer for

the type of diving they are doing, even in between dives if they wish. On every

dive the VR computer records tissue and bubble states using both algorithms so

divers can swap between the two without compromising their ability to switch

back.

User Interaction with your VR computer takes three forms:

PC link

Battery Compartment

Control Switches

The PC link on the VR computer is used either to download dive data

(page 29) into a PC or upload gas data into the VR. You have a choice of

connecting either via infra red link or via direct cable link. The direct cable

link will connect with all VR2s but only with VR3s that have a 7 pin I/O

connector, (i.e. those manufactured since June 2003). On the VR2 the infra

red signal beams from the centre at the back behind the screen and on the

VR3 from the bottom right hand corner of the front of the screen. (On older

models, pre-June 2003, the signal beams from the top of the screen under

the VR3 logo).

With pc link you can use the VR Software Suite package which includes:-

Prolog dive logging software to download dives and upload gas lists

Proplanner decompression planning software

Decobooks to upload text to read on your VR during decompression

Screensaver / Logo Generator to upload a graphic to your VR

PIN and Security Information upload facility

For full instructions on using the Software Suite see the User Guide included

on the CD-Rom. A sample version of Prolog is supplied with each new VR

computer to allow users to see and interact with examples of downloaded

profiles.

user interaction

pc link

battery compartment

The battery compartment is opened using a dedicated tool. O-rings (N70

18 x 2mm Nitrile) should be replaced after 10 battery changes or if

they become damaged or worn.

The battery must be inserted positive + end first or the VR will not work. It

must move freely within the battery cap. If the battery coating is too thick

and fits too tightly in the cap, this may lead to power supply problems

during the dive. Screw the cap in until the thread bottoms out and keep

the thread clean as this provides the system earth.

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