Hollis DG05 User manual

Hollis DG05 User Manual RevA
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To ensure your user information is up to date. Please check
www.HollisGear.com for updates to this manual.
DG05
Dive Computer Manual

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EC Type Examination
Conducted by SGS United Kingdom Ltd., Unit 202b Worle Parkway, Weston-super-
mare, BS22 6WA. Notified Body No 0120
CE Declaration
EC Type certification under the Directive 89/686/EEC has been granted to these
devices as a Diving Safety Device when used in conjunction with one of the following
accessories.
i. HP Link Safety Device for Diving (EN 14143:2003, EN 250:2000.)
ii. Optical Rebreather Interface (ORI) 4th Cell Connection –Safety Device for
Diving (EN 14143:2003)
This product complies with EN 13319:2000
Model Types covered in this manual
DG05 Computer
Optical Rebreather Interface (ORI)
Wireless HP gas Interface
WARNING
Diving is an adventurous sport and should not be
undertaken without receiving the necessary training
from a recognised training agency.

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WARNING!
Even if your dive computer or PC generated software allows for less
conservatism and a reduction in decompression times this should not be
arbitrarily undertaken without first researching data available from other
divers/agencies, conducting controlled trials and understanding that you may
be undertaking a level of experimentation in order to adjust the algorithm for
your specific needs.
No decompression algorithms can give a guaranteed safe decompression. It is
your responsibility to be trained, dive safely, carry backup tables and
instrumentation and compare any decompression profiles generated by the
DG05 computer and their associated decompression software against established
diving tables with which you are happy and/or accept that you may be
conducting experimental decompressions.
High pressure gas sensors and PO2 monitors when connected to DG05 dive
computer product provide for the additional monitoring of key safety data. It is
important that in the unlikely event of failure, back-up instrumentation is
carried.
In the case of a rebreather, the unit should be capable of monitoring the PO2 in
addition to using information from the DG05 computer.

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Abbreviations used in this Manual
OC - Open Circuit
CC - Closed Circuit
RB - Rebreather
CCR - Closed circuit rebreather
SCR - Semi-closed rebreather
OLED - Organic Light Emitting Diode
PO2 - Partial pressure of oxygen
FO2 - Fraction of oxygen
FiO2 - Inspired fraction of oxygen
Bat Low - Battery low
CD - Compact disc
Setpoint - The oxygen partial pressure that the rebreather will attempt to maintain
TTS - Total time to surface
RTS - Run-time to surface
O2 - Oxygen
MOD - Maximum operating depth
EGF - Equivalent Gradient Factor
MaxD - Maximum depth
Deco - Decompression
ORI - Optical Rebreather Interface
VGM - Variable Gradient Model

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Congratulations on your purchase of your DG05 dive computer. You are
going enjoy learning how to use your new computer.
The DG05 comes with the following features:
OLED Screen
Wireless HP Transmission
Optocon (IR transmission of PO2/PC link) - No wet connectors
Auto large graphics mode - The menu bar disappears after a few
seconds and the rest of the text gets larger
Automatic external sensor sensing (Xfunc) -the unit knows what is
connected to the Optocon port and adjusts automatically
Power saving modes –Increases battery life
Simplified gas selection menus and rebreather bailout mode
Icon menus
Single and 3 sensor oxygen cell options (auto sensing)
Variable Gradient Model algorithm

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Battery
The DG05 is fitted with a rechargeable Lithium-ion battery. A multi-voltage charger
is supplied, that will recharge a completely flat battery in approximately 3 hours.
The battery level is shown in percentage on the main front dry screen. A full battery
will give the approximate performance below:
Note all times are
approximate
DG05 -
4.2v
Lithium
Ion
Sleep no use
6 months
On time with backlight on
10 hours
On time with backlight off
20 hours
On time with torch and
backlight on
8 hours
Power usage will vary dependant on the ambient temperature and the charged
duration.
The DG05 battery comes with a 4-year warranty. The lithium battery needs to be
serviced and replaced at the factory. Do not take the DG05 apart or change the
battery yourself. Warranty is void if the DG05 has been opened or tampered
with.
Switches
On the left and right at the bottom are two black plastic slide switches which you use
to navigate your way through the functions of the computer either on the surface or
underwater.
The switches work in four ways, as follows:-
1. A short push and release of one switch.
2. A push and long hold of one switch (hold the switch in until the screen changes.)
3. A short push of both switches –characterised by thin enclosed brackets < > with
the menu item between them.
4. A long push and hold of both switches (again, hold the switches in until the screen
changes.) –characterised by thick enclosed brackets with the menu item between
them.

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Your DG05 is activated by pushing and holding either switch. The first screen to be
displayed will be the Home screen.

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DG05 Organic LED display (OLED)
The OLED display gives a clear bright image that is especially readable in medium to
low light conditions, similar to those experienced in many diving scenarios. However,
it should be noted that OLED displays do not perform as well in bright sunlight as
more conventional LCD displays.
The OLED display inherently takes more power than LCD displays. With this in
mind, power can be saved by reducing the number of pixels showing bright colours.
This then leads to a new colour scheme for all screens, and in particular has led to a
revised dive screen that shows the OLED display to its best advantage.
The colour scheme style and new dive screen options can be accessed from the
existing Display Modes screen. When accessing Display Modes, the user is first
taken to the OLED display modes screen.
OLED dive screen
with ascent rate (blue) bar on the right.
Gmode can be set to HP (if fitted), TTS or PO2. PO2 is only available if a DG05
rebreather interface (ORI) is fitted.
No stop dive display

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There are 3 OLED display modes to choose from:
1. OLED mode
2. Dive Screen
3. Dive Toggle
Display Modes Screen
By ticking the OLED mode, the Dive screen mode is automatically turned on. The
OLED Mode basically reverses the white and black of the display, so the background
becomes black, and text and numbers become white.
The OLED Dive option chooses to use the new dive screen with a black background
and new look. There is less information in this screen than the classic version, but
it is more simply and clearly laid out. With this reduction in information in mind, the
Dive Toggle option allows the user to revert to the classic screen for 10 seconds to see
all dive information by doing a short left button press.
Finally, to go to the normal (classic) display modes where further data selections can
be made for the classic dive screen, the user can select the Display modes option at
the bottom of the list. This is the normally highlighted option when going to the
Display modes screen.
Note. These selections cannot be made for the OLED display
Home Screen
Note. The battery indicator on the NHeO 3 will show a voltage, whereas the DG05x
will have a % remaining display.
Note. The screens show (unless identified otherwise) are with the DG05x in non-
OLED Screen mode (see page 11).

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The Home Screen Features
The current active gas, (top left hand corner)
The current remaining battery voltage percentage, (middle left)
A BAT LOW advisory when the battery voltage is low. The battery should
be changed/charged before diving.
The Pre Dive Check mini screen feature, (on Start Up the log screen shows
first, giving you a profile of your most recent dive.)
A gas bottle graphic in the bottom left corner
A menu graphic in the bottom right corner
A GO graphic in the centre at the bottom
Understanding our PIN Upgrade System
DG05 Dive computer comes configured with the external oxygen sensor port turned
on and can monitor up to 3 oxygen sensors.
No external link hardware (cable etc.) is supplied with this computer and can be
purchased separately.
If you purchased your DG05 and wish to upgrade with a new PIN, please contact us
or your dealer to purchase the PIN. Pin information can be found on white strips
attached to the plastic CD envelope that came with the computer. Please keep these
PINs, and any other PINs you subsequently purchase, in a safe place.
To activate the purchased level and features, enter the 16 digit PIN(s) following the
procedure outlined below. To purchase further level upgrades or activate additional
features, contact your DG05 Computer dealer. So that the dealer can give you the
correct PIN(s), when you make the purchase you will need to provide the unique 16
digit serial number of your DG05. This Serial Number is on line 4 of the PIN screen
which can be found in the SETUP menu.
The SETUP menu is accessible via the mini screen feature in the Home screen.
How to enter a PIN
PINs are keyed in using the switches and are logged in on the bottom line of the PIN
NUM screen. A short push on a switch will move the number highlighted by 1; a long
hold will move it by 8. When keying in each digit or letter move forwards using the
right hand + switch. Do not move backwards using the left hand - switch except to
correct, as this may cause previously entered numbers to change. After you have
keyed in the last digit of your PIN there will be a pause before the cursor moves to the
top of the screen you can use the left and right switches to key in your name and
phone number, or any other data you wish, in order to identify the DG05 computer as
yours, (see below).
After a PIN has been successfully installed the bottom line of the screen will
revert to 16 zeros.

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Security and Trace-ability
A key benefit of the PIN system is the security and trace-ability it offers. In order to
change or remove the identifying particulars you have installed, someone would need
one of your PINs so keep them in a safe place away from your DG05. Then, if your
computer is ever lost or stolen, notify us and, as your identifying particulars will still
be there on the screen, we can look out for it in the event that it ever comes in to us
for repair or upgrade. Also don’t forget to register ownership via our website,
www.HollisGear.com. If you lose your PIN(s), we can only reissue them to you if we
have you listed as the owner. If you should ever sell on your computer, you will need
to give the new owner the PINs so that the security information can be changed.

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The Home Screen –Navigation via Mini Screen Feature
Large Graphics
DG05 come with an automatic large graphics feature. After a few seconds the menu
icons at the bottom of the screen disappear and the remaining characters are resized to
a larger format. Pushing any button brings the menus back.
Pre Dive Check
The Mini Screen feature in the Home Screen is designed primarily to make it easy for
you to check the settings in your DG05 and allow you to change any of the settings if
necessary before you dive. The mini screen shows a small version of the actual menu
you will go to by selecting <GO>. Additional menu screens can me accessed by doing
a long hold on the right button when the menu icon is displayed as in the right
hand corner of the Home screen above.
The screen on the left will be displayed when in the Display Mode menu if the Photo
box is not ticked and will be set to the screen on the right if the Photo box is set to a
tick, A or F (see Display Modes).
A short push on either the right or left switch will allow you to move through the mini
screens one by one. Again, a short push of both switches <GO> will expand
whichever mini screen is currently showing and allow you to change settings within
the screen.

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The mini screens appear in the following order with successive short pushes of the
right hand switch. Whatever the last screen is that you were using, when you have
finished changing options and go back to the front screen, that mini screen will be the
one displayed.
Log
Gas List
Options menu
Oxygen Sensor - with Xfunc set (a PIN upgrade option: see Rebreather Link
and Oxygen Analyser sections). Only displays if XFunc set on.
HP WiVi
Time & Date
Help Menu
OLED dive modes
Set Up
VGM (PIN option NHeO 3)
Fly Time
Dive Options
The following additional options are available through the Menu feature
Optocon
Gas Calculator (PIN required)
No Stop Plan
Display Modes
A long push of the left hand switch at any time in the Home Screen will take you into
the Gas List so you can set up, select or adjust the gas mixes you are planning to dive
with as well as set your computer to open circuit or closed circuit decompression
calculations.
Setting the Time & Date Screen
Mini Screen Full Screen
The DG05 is accurate to the European PREN standard for digital dive timing devices
but it is not a precision chronograph. You may need to adjust it occasionally in order
to display the correct time.
Changing the time will not affect de-saturation calculations.

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A short push of the right switch + will increment the highlighted field by one, a long
push by ten.
A short push of the left hand switch will decrement the highlighted field by one, a
long push by ten.
A short push of both switches together will move the highlight to the next field.
A long push of both switches will exit the screen, save the changes and return you to
the home screen.
Powering up the DG05
It is not necessary to power up the DG05 before you dive. The screen will
automatically power up within a minute of exposure to an absolute pressure of 1.3 Bar
or greater. Note: This means in practice that if you do a very fast descent the DG05
computer may not switch on until you are at depth.
If you want the screen to be on from the moment you enter the water, power up the
DG05 before you dive by pushing either switch once. The screen will stay active for 5
minutes after any button push (On the surface, if no switch is pushed the DG05 will
turn itself off after about a minute to save power.)
General Setup
Functions such as Safety factor, Units (M/ft), Minimum Stop Depth and Light Mode
are all available on the SETUP Menu and come supplied at the factory defaults of 0%,
M, 3m, and 60% as standard. If you wish to change this please do so before diving
and refer to the relevant section of the manual.
Also shown on this screen in the bottom right hand corner is the software version of
your unit.
A short push of the left hand switch will decrement the highlighted field by one, a
long push by ten. A short push of the right hand switch will increment the highlighted
field by one, a long push by ten.
A short push of both switches together will move the highlight to the next field.
A long push of both switches will exit the screen, save the changes and return you to
the home screen.

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Setting up the Gas List
The last thing to do before diving is to set up the Gas List. From the mini- screen or
from, a long push of the left button will display the GAS SELECT screen.
(Open circuit mode shown)
There is a square function box and a radio button. In G3 mode (see Setup screen) only
4 gases are displayed. In G10 mode by using the left button all 10 gases can be
displayed on extra screen pages.
The function box has the following features (changed by the + button).
–This means the gas is available in open and/or closed circuit
CC –This means it is only a closed circuit gas (only available in CCR mode).
B –This means it is a bailout gas (open circuit only)
An empty box means it is not selected.
The radio button (when highlighted) means that the gas is currently being used.
Used gases always appear at the top of the list followed in order by the other gases in
ascending Maximum Operating depths (MOD’s).
To move between gases and buttons/boxes use the arrow button (short push left).
As a gas is assigned a function it will move up the list in MOD order.
To adjust a gas, select the spanner/wrench icon (short push both). This now leads to
the following screen.
Now a short push of both button moves along the gas row and allows you to change a
function/% by using the –and + buttons. If you change the MOD the PO2 of the
selected dive gas will also change.
Function Box
Radio Button
Open Circuit icon

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Setting the MOD is important as this is the depth at which the DG05 will
automatically prompt you to change gases and it is also the depth which it bases
its’ decompression look ahead calculations upon.
A short push of both buttons exits the menu and first gas select screen on
the previous page is again displayed. Now selecting will go to the following
screen.
Selecting the tick returns you to the Home screen if on the surface or the dive screen if
underwater and you gas selections are all saved. Selecting allows you to
go back through the adjusting sequence again or selecting allows you to
switch to closed circuit mode (if you have the PIN installed).
Closed circuit mode uses the same sequence of screens to set up and adjust gases and
ends in the following screen.
Pressing goes back to the gas set up screens, pressing switches
the unit back to open circuit mode and selecting the tick saves the changes and exits to
the Home or dive screen.
Also in the previous screen the PO2 can be adjusted. A short push of + increments the
PO2 by 0.05. A long hold jumps to the previously saved PO2 after the last screen exit.
In this mode two PO2’s can be set up and toggled between. Set one up and exit the
screen (tick), then go back in and set another up using short pushes of the left switch.
Now do a long hold and the value will toggle between the two. Tick to exit and the
pair are saved.

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Let’s go Diving!
You have now set up all the key features to enable you to go diving. There are many
other features available to allow you to customise your diving experience. Please read
on for more information!

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Decompression Algorithms
DG05 dive computers have the option to use a derivative of the Buhlmann ZHL 16
algorithm modified to assimilate the latest thinking in practical micro-bubble
avoidance for enhanced decompression safety.
The DG05 comes as standard with an alternative algorithm called VGM (please see
the description at the end of this manual and on our website).
You will note that on all decompression dives, the Buhlmann algorithm will prompt
for deep-water controlling stops of 2 minutes in duration. Deep-water stops are
recognised by their duration (normally two minutes) and a + next to the time. It is
important that these stops are conducted correctly for a safe decompression as they
help to reduce the problems associated with potential micro-bubble growth during an
ascent.
Should a microbubble stop be missed, a “Use tables” message will appear. The
decompression schedule displayed thereafter, although very close to the required
duration, may be in error. If this occurs consult backup tables and add additional stops
or stop time as required. While continued diving with the DG05 is possible, the
decompression displayed may not be exact. “Use tables” will show for 24 hours.
A major advantage of the dual algorithm system is that after activating the VGM
upgrade you still have access to the original Buhlmann algorithm and can even switch
between the two algorithms from dive to dive if you wish depending on the type of
diving you are doing. This is possible because although the decompression profile on
your DG05 screen reflects only the selected algorithm, the computer still records
tissue and bubble states using both.

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Optocon for DG05 Series Dive Computers
Introduction
The DG05 series of dive computers now come supplied with a new interface
connector. This connector uses infra red light to transmit data to and from the dive
computer. This system is called Optocon.
In the case of the DG05 (with a rechargeable battery) two charging pins are
incorporated within the connector.
Remote devices such as oxygen sensors can be connected to the system (there is a
separate system for wireless HP transmitters).
The DG05 computer end of the connection system can tolerate water on the mating
surfaces. The connector acts as a complete water block and requires very simple
maintenance when compared to a standard marine electrical connector.
Background
Since electrical systems have been used underwater, they have often been limited by
the ability of interconnected devices to keep out water. In this respect, water getting
into connectors and cables can be the main cause of system failures. With this
overarching problem, we carry an optical system called OPTOCON for
interconnecting devices (designed by DG05 Technology). This system has been
released in their dive computer and life support product to increase the reliability of
data communications underwater.
Feature overview
The Optocon system achieves improved reliability when compared to cable and
connector interconnected systems.
As the data transmission is optically digital, the system can receive data even with
poor transmission paths.
System connection status accurately shows if there is a link or module fault. This
gives improved data integrity compared to analogue electrically connected systems,
whereby an unconnected or faulty cable/connector can not be detected reliably except
by inference or as an ‘unusual’ reading. The OPTOCON system status clearly shows
faulty or missing modules, allowing the user to take appropriate action.
Due to the encoding and error checking of the data streams, sunlight, TV remote
controls and other extraneous light will not be interpreted as sensor data.

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Optocon Infra Red Technology –An overview
The Optocon system uses light to send encoded data to and from devices.
Data is sent using an LED and received using a phototransistor. A Fibre Optic Cable
(FOC) is used to carry the light to and from the remote device. A “transmitter” from
one device is connected to the “receiver” on the mating device. The mating connector
below shows two FOCs, one to send data, and one to receive.
FOC is flexible and robust but it can break. However, small cracks will still allow data
to pass through and water can even assist in transmission since it fills the cracks better
than air, allowing light to pass. The supplied FOCs are extra-long to allow for
trimming after accidental breakage. From a service perspective, replacement cables
are relatively inexpensive, and can be sent easily by post or retained in a spare parts
kit.
When mated, the FOC should be placed very close to the LED and Phototransistor to
ensure a good light coupling. A thin layer of water or air (2mm) can be tolerated
between the FOC and the LED, but to achieve the best data quality, the connector
faces should be well mated and clean.
To enable data transmission from for example, a remote HP Sensor to the Prism 2
rebreather, the sensor housing contains a controller Printed Circuit Board (PCB) and
very a small battery. The send device in the housing contains an intelligent control
system called “Intellisend.” This system sends data frequently if the sensor reading is
changing, but reduces power consumption and reduces the send rate if the readings
are not changing. When any Optocon device is removed, i.e. the oxygen sensors for
storage, no user action is required once the device is returned to the system. All data
reconnection is carried out automatically. This system offers a potential battery
module life of around 3-5 years (dependant on the sensor attached.)
Phototranisistor
receiver
LED Transmitter