Operating Instructions

Operating Instructions
Operating Instructions
Shearwater Perdix Operating Instructions
Table of Contents
Introduction����������������������������������������������������������������������������������������������������������������5
Feature List��������������������������������������������������������������������������������������������������������������5
Installing Straps or Bungee Cord����������������������������������������������������������������������������6
Straps ���������������������������������������������������������������������������������������������������������������������6
Bungee Cord������������������������������������������������������������������������������������������������������������7
Turning On�����������������������������������������������������������������������������������������������������������������8
Auto-On�������������������������������������������������������������������������������������������������������������������8
Buttons�����������������������������������������������������������������������������������������������������������������������9
The Main Screen������������������������������������������������������������������������������������������������������10
Color Coding����������������������������������������������������������������������������������������������������������10
The Top Row����������������������������������������������������������������������������������������������������������11
The Center Row�����������������������������������������������������������������������������������������������������13
Center Row Configuration����������������������������������������������������������������������������������14
The Bottom Row����������������������������������������������������������������������������������������������������15
Info Screens ������������������������������������������������������������������������������������������������������������17
Compass����������������������������������������������������������������������������������������������������������������21
Viewing the compass�����������������������������������������������������������������������������������������21
Marking a Heading���������������������������������������������������������������������������������������������21
Menus�����������������������������������������������������������������������������������������������������������������������22
Open Circuit Menu Structure���������������������������������������������������������������������������������23
Closed Circuit (Int. PPO2) Menu Structure������������������������������������������������������������24
Simple Example Dive����������������������������������������������������������������������������������������������25
Gauge Mode�������������������������������������������������������������������������������������������������������������26
Stopwatch��������������������������������������������������������������������������������������������������������������26
Resettable Average Depth�������������������������������������������������������������������������������������26
Decompression and Gradient Factors������������������������������������������������������������������27
Menu Reference�������������������������������������������������������������������������������������������������������28
Turn Off������������������������������������������������������������������������������������������������������������������28
Switch Setpoint �����������������������������������������������������������������������������������������������������28
Select Gas�������������������������������������������������������������������������������������������������������������29
Radio Station Gases������������������������������������������������������������������������������������������29
Select Gas Menu Styles�������������������������������������������������������������������������������������30
Switch to OC/CC����������������������������������������������������������������������������������������������������31
Dive Setup�������������������������������������������������������������������������������������������������������������31
Low Setpoint������������������������������������������������������������������������������������������������������31
High Setpoint�����������������������������������������������������������������������������������������������������32
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RevA
Shearwater Perdix Operating Instructions
Table of Contents (continued)
Define Gas���������������������������������������������������������������������������������������������������������33
Dive Planner������������������������������������������������������������������������������������������������������35
Conservatism�����������������������������������������������������������������������������������������������������37
NDL Display�������������������������������������������������������������������������������������������������������38
Brightness����������������������������������������������������������������������������������������������������������40
Dive Log Menu�������������������������������������������������������������������������������������������������������41
Display Log��������������������������������������������������������������������������������������������������������41
Upload Log���������������������������������������������������������������������������������������������������������41
Edit Log Number������������������������������������������������������������������������������������������������41
System Setup��������������������������������������������������������������������������������������������������������42
Mode Setup��������������������������������������������������������������������������������������������������������43
Deco Setup��������������������������������������������������������������������������������������������������������45
OC Gases ���������������������������������������������������������������������������������������������������������45
CC Gases ���������������������������������������������������������������������������������������������������������45
Auto SP (Setpoint) Switch����������������������������������������������������������������������������������46
Compass Setup�������������������������������������������������������������������������������������������������49
Calibrate�������������������������������������������������������������������������������������������������������������50
System Setup�����������������������������������������������������������������������������������������������������51
Advanced Configuration 1����������������������������������������������������������������������������������52
Advanced Configuration 2����������������������������������������������������������������������������������53
Firmware Upload and Dive Log Download������������������������������������������������������������54
Changing the Battery����������������������������������������������������������������������������������������������55
Battery Types���������������������������������������������������������������������������������������������������������56
Behavior on Battery Change����������������������������������������������������������������������������������57
Error Displays����������������������������������������������������������������������������������������������������������59
Troubleshooting������������������������������������������������������������������������������������������������������61
Storage and Maintenance���������������������������������������������������������������������������������������61
Servicing������������������������������������������������������������������������������������������������������������������61
Specifications����������������������������������������������������������������������������������������������������������62
FCC Warning������������������������������������������������������������������������������������������������������������63
Industry Canada Warning���������������������������������������������������������������������������������������63
Contact���������������������������������������������������������������������������������������������������������������������64
3
RevA
Shearwater Perdix Operating Instructions
DANGER
This computer is capable of calculating deco stop requirements. These calculations are
at best a guess of the real physiological decompression requirements. Dives requiring
staged decompression are substantially more risky than dives that stay well within nostop limits.
Diving with rebreathers and/or diving mixed gases and/or performing
staged decompression dives and/or diving in overhead environments
greatly increases the risk of scuba diving.
You really are risking your life with this activity.
WARNING
This computer has bugs. Although we haven’t found them all yet, they are there. It is
certain that there are things that this computer does that either we didn’t think about,
or planned for it to do something different. Never risk your life on only one source of
information. Use a second computer or tables. If you choose to make riskier dives,
obtain the proper training and work up to them slowly to gain experience.
This computer will fail. It is not whether it will fail but when it will fail. Do not depend on
it. Always have a plan on how to handle failures. Automatic systems are no substitute
for knowledge and training.
No technology will keep you alive. Knowledge, skill, and practiced procedures are your
best defense (Except for not doing the dive, of course).
4
RevA
Shearwater Perdix Operating Instructions
Introduction
The Shearwater Perdix is an advanced technical
diving computer for open and closed circuit divers.
Although we strive to make the Perdix easy enough
to use without reading the manual, please take
some time to read this manual to get the best
performance from your new computer. Diving
involves risk and education is your best tool for
managing this risk.
Feature List
• Technical open and closed circuit dive computer.
• Bühlmann decompression model with gradient factors conservatism
• Optional VPM-B decompression model
• Imperial and metric displays
• Depth and time display
• A menu system that adapts to diving status
• Automatic turn off after 30 minutes on the surface
• Depth sensor rated to 450 feet/140 meters of seawater
• Dive Planner
• Any combination of oxygen, nitrogen, and helium (Air, Nitrox, Trimix)
• Open and closed circuit, switchable during a dive
• 5 CC and 5 OC gases
• Gases can be changed and added during a dive
• CNS tracking
• No lockout from violating deco stops
• Automatic PPO2 set-point switching (configurable)
• Two CC PPO2 set-points, each of which can be set between .4 and 1.5
• Flexible user replaceable battery. Almost any ‘AA’ type
• 1000 hour dive log memory
• Tilt compensated digital compass with markable headings
• Log downloads and firmware upgrades using Bluetooth
5
RevA
Shearwater Perdix Operating Instructions
Installing Straps or Bungee Cord
The Perdix includes mounting points for either two elastic straps or two bungee cords.
Both types are included in the box.
Straps
Install the elastic straps as shown in the image below. The buckles feature a locking
mechanism to prevent them from inadvertently loosening. Press the tab to allow the
buckle to slide freely on the straps.
Strap width is 3/4” (19 mm).
Install the straps and buckles as shown
6
RevA
Shearwater Perdix Operating Instructions
Bungee Cord
Bungee cord can be installed in many ways based on your preference. Two examples
are shown.
The holes are sized for 3/16” (4.8 mm) diameter cord.
Allergy Alert! The supplied elastic surgical tubing contains LATEX.
A simple overhand knot (at left)
works well to secure the bungee
cord.
However, this knot can pull
through the mounting holes
under very high load.
1
3
2
We find that the knot at right
works well.
This knot has the nice feature
of creating loops that stay wide
open while putting the Perdix on
your wrist.
1
3
2
4
Tip: Use two pieces of cord
When using the bungee cord, always create two independent loops so
that a single break does not result in a lost dive computer. If using a single
continuous piece of cord, isolate the sides with a knot.
7
RevA
Shearwater Perdix Operating Instructions
Turning On
To turn the Perdix on, press both the
MENU (left) and the SELECT (right)
buttons at the same time.
Auto-On
The Perdix will automatically turn-on when submerged underwater. This is based on
pressure increase and not on the presence of water.
Do NOT rely on the auto-on feature
This feature is supplied as a backup for when you forget to turn on your Perdix.
Shearwater recommends turning on manually before each dive to confirm proper
operation and to double check battery status and setup.
Auto-On Details
The Perdix turns on automatically when the absolute pressure is greater than 1100
millibar (mbar). For reference, normal sea level pressure is 1013 mbar and 1 mbar of
pressure corresponds to approximately 1 cm (0.4") of water.
So the Perdix will automatically turn-on when about 0.9 m (3 ft) underwater when at
sea level. If at higher altitude, then the Perdix auto-on will occur at a deeper depth. For
example, when at 2000 m (6500 ft) altitude the atmospheric pressure is only about 800
mbar. Therefore, at this altitude the Perdix must be submerged underwater by 300 mbar
to reach an absolute pressure of 1100 mbar. This means the auto-on occurs at about 3
m (10 ft) underwater when at an altitude of 2000 m.
8
RevA
Shearwater Perdix Operating Instructions
Buttons
Two piezo-electric buttons are used to change settings and view menus.
Except for turning the Perdix on, all operations are simple single button presses.
MENU (left)
button
SELECT (right)
button
Don’t worry about remembering all the button rules below. Button hints
make using the Perdix easy.
MENU button (Left)
• From main screen: brings up the menu.
• In a menu: moves to the next menu item.
• Editing a setting: changes the setting’s value.
SELECT button (Right)
• From main screen: steps through information screens.
• In a menu: performs command or starts editing.
• Editing a setting: saves the setting’s value.
BOTH BUTTONS
• When Perdix is off: pressing MENU and SELECT at the same time will turn the Perdix on.
• No other operation requires pressing both buttons at the same time.
Button Hints
When in a menu, button hints label each button.
For example, the hints to the right tell us:
use MENU to change the brightness value.
use SELECT to save the current value.
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RevA
MENU hint
SELECT hint
Shearwater Perdix Operating Instructions
The Main Screen
Top Row
Depth, Time &
Deco Stops
Center Row
PPO2
Bottom Row
Mode, Gas &
Deco Info
The main screen shows the most important information needed for technical diving.
Color Coding
Color coding of text draws attention to problems or unsafe
situations.
Sample warning a better gas is available
White text indicates normal conditions.
YELLOW is used for warnings that are not immediately
dangerous but should be addressed.
FLASHING RED is used for critical alerts that could be life
threatening if not immediately addressed.
Color Blind Users
The warning or critical alert states can be determined
without the use of color.
Warnings display on a solid inverted background.
Critical alerts flash between inverted and normal text.
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RevA
Flashes
Sample critical alert continuing to breathe this
gas could be fatal
Warning - doesn't flash
Flashes
Critical alert - flashes
Shearwater Perdix Operating Instructions
The Top Row
The top row shows depth and time information
Depth
Imperial: In feet (no decimal places).
Metric: In meters (displays with 1 decimal place up to 99.9m)
Note: If the depth shows a Flashing Red zero, then the
depth sensor needs service.
DEPTH
229
in feet
DEPTH
69.7
in meters
Ascent Bar Graph
Shows how fast you are currently ascending.
Imperial: 1 arrow per 10 feet per minute (fpm) of ascent rate.
Metric: 1 arrow per 3 meters per minute (mpm) of ascent rate.
30 fpm
9 mpm
50 fpm
15 mpm
White when 1 to 3 arrows, Yellow when 4 to 5 arrows, and Flashes Red when 6 arrows or more.
60+ fpm
15+ mpm
Note: Deco calculations assume a 33fpm (10mpm) ascent rate.
Dive Time
The length of the current dive in minutes.
The seconds display as a bar drawn below the word “Time.” It
takes 15 seconds to underline each character in the word. Does
not display the seconds bar when not diving.
Battery Icon
11
Yellow when the battery needs to be changed.
Red when the battery must be replaced immediately.
The default behavior is that battery icon is shown on the surface but disappears when diving. If low or critical then the battery icon will appear while diving.
RevA
TIME
25
TIME
25
in minutes
seconds bar
at about 45s
OK
low battery
change
now!
Shearwater Perdix Operating Instructions
Stop Depth and Time
STOP
Stop – The next decompression stop depth in the current units
(feet or meters). This is the shallowest depth to which you can
ascend.
9O
TIME
2
Stop at 90ft for 2 min
DEPTH TIME
STOP TIME
84 62 9O 2
Time – The time in minutes to hold the stop.
Will Flash Red if you ascend shallower than the current stop.
By default the Perdix uses a 10ft (3m) last stop depth. At this
setting, you may perform the last stop at 20ft (6m) with no
penalty. The only difference is that the predicted time-to-surface
will be shorter than the actual TTS since off-gasing is occurring
slower than expected.
Alert - depth is
shallower than the
90ft stop depth
There is also an option to set the last stop to 20ft (6m) if you
wish.
SURFACE
Surface Interval
When on the surface, the STOP DEPTH and TIME are replaced by a surface interval display.
Shows the hours and minutes since the end of your last dive. Above 4 days, the surface interval is displayed in days.
The surface interval is reset when the decompression tissues
are cleared. See the section on Tissues Cleared.
Sample surface main screen showing the surface interval
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RevA
2hr 45mn
Shearwater Perdix Operating Instructions
The Center Row
The center row displays PPO2. PPO2 units are absolute atmospheres (1ata = 1013mbar).
The layout varies depending on the current mode:
Mode
Open Circuit
Closed Circuit
with
Internal
PPO2 Setpoints
Menu Setup
Center Row Display
GasPO2
1.15
OC Gas
1.3
CC Internal Setpoint
In OC mode, PPO2 displays in Flashing Red when less than 0.19
These limits can be adjusted in the Adv. Config 2 menu.
or greater than 1.65.
For CC mode, the Perdix only uses fixed PPO2 setpoints. There is no option to connect
the Perdix directly to oxygen sensors for direct monitoring of loop PPO2. This option is
available in the Petrel 2 Fischer and DiveCAN models. Fixed PPO2 setpoints are used to
calculate backup decompression schedules when CC diving.
13
RevA
Shearwater Perdix Operating Instructions
Center Row Configuration
In most modes, the center row displays can be customized.
#(
"! %
&'
( $
!
"# ")
Configure the center row in the System SetupCenter Row Menu.
The left and right positions can be set to display the following:
Option
None
Max Depth
Avg Depth
@+5
Ceil
GF99
CNS
Clock
DET
Dil PPO2
FiO2
Timer
Compass
Description
Blank (default value).
The maximum depth of the current or previous dive.
The average depth of the current or previous dive.
The TTS if remaining at current depth for 5 more minutes.
The current decompression ceiling (not rounded to the stop
interval).
The Bühlmann ZHL-16C super-saturation percent gradient.
Central Nervous System (CNS) toxicity clock as a percentage.
The time-of-day in 24hr or am/pm format (same as system
setting). Does not show ”am” or “pm”.
Dive End Time. The time-of-day when the dive will end (i.e. Clock
plus TTS). In 24hr or am/pm format (same as system setting).
Does not show “am” or “pm”.
The diluent PPO2 at the current depth (Only available when CC
is available).
The fraction of inspired O2 as a percentage (Only available when
CC or SC is available).
Timer (stopwatch) with minutes and seconds.
A miniature compass. Works like a regular compass with the red
end of the needle always points to North
The center position can only display PPO2. In OC only mode, the PPO2 display can optionally
be turned off.
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RevA
Shearwater Perdix Operating Instructions
The Bottom Row
The bottom row displays the current mode, gas and decompression information.
Circuit Mode
The current breathing configuration. One of:
OC = Open circuit (when CC available, displays in Yellow to indicate bailout condition)
CC = Closed circuit
Current Gas (O2/He)
The current gas shown as a percentage of Oxygen and Helium.
The remainder of the gas is assumed to be Nitrogen.
In closed circuit mode, this gas is the diluent. In open circuit
mode this is the breathing gas.
Displays in Yellow when there is better deco gas available than
the current gas.
No Decompression Limit (NDL)
The time remaining, in minutes, at the current depth until
decompression stops will be necessary. Displays in Yellow when
the NDL is less than 5 minutes.
Once NDL reaches 0 (i.e. deco stops needed), the NDL display
is just wasting space. To address this, a few different values can
be set to replace the NDL (see Dive SetupNDL Display).
The options are:
CEIL: The current ceiling in the current units (feet or meters).
Flashes Red if you ascend shallower than the current ceiling.
15
RevA
OC
or
CC
OC
CC
O2/HE
21/OO
O2/HE
Air
10/5O Tx
O2/HE
O2
{ 21%
79% N2
{
10% O2
50% He
40% N2
a better deco
21/OO gas available
NDL
2O
NDL
5
CEIL
74
Shearwater Perdix Operating Instructions
GF99: The raw percentage of the Bühlmann allowable
supersaturation at the current depth.
GF99
8O%
@+5: The predicted time-to-surface (TTS) if you were to stay at
the current depth for 5 more minutes.
Time-to-Surface (TTS)
The time-to-surface in minutes. This is the current time to
ascend to the surface including the ascent plus all required deco
stops.
@+5
2O
TTS
35
Assumes:
• Ascent rate of 33 feet per minute (10 meters per minute).
• Decompression stops will be followed.
• Programmed gases will be used as appropriate.
The bottom row is also used to show additional information.
By using only the bottom row for this additional information, the critical information contained
on the Top and Center Rows is always available during a dive.
The additional information that can be displayed on the bottom row includes:
Info Screens:
Shows additional dive information.
Press SELECT (right button) to step through info screens.
Menus:
Allows changing settings.
Press MENU (left button) to enter menus.
Warnings:
Provide important alerts.
Press SELECT (right button) to clear a warning.
!"#
The bottom row is used to display additional information
16
RevA
Shearwater Perdix Operating Instructions
Info Screens
Info screens display on the bottom row.
Press SELECT (right) button to step
through the info screens.
SELECT button
SELECT button
SELECT button
Info screens provide additional information that does not fit on the main screen.
Starting from the main screen, the SELECT (right) button steps through the info screens.
When all info screens have been viewed, pressing SELECT again will return to the main
screen.
Info screens time-out after 10 seconds, returning to the main screen.
Pressing the MENU (left) button will also return to the main screen.
The info screen content is optimized for each mode. Set the Perdix to the mode you will be
using (e.g. OC) and step through the info screens to get familiar with the content.
The next section describes the individual values shown on the info screens.
17
RevA
Shearwater Perdix Operating Instructions
Average Depth
Displays the average depth of the current dive, updated once
per second.
When not diving, shows the average depth of the last dive.
AVG
5Oft
Average Depth in Atmospheres (AvgATM)
The average depth of the current dive, measured in absolute
atmospheres (i.e. a value of 1.0 at sea level). When not
diving, shows the average depth of the last dive.
AvgATM
2.52
Maximum Depth
The maximum depth of the current dive.
When not diving, displays the maximum depth of the last
dive.
MAX
26Oft
CNS Toxicity Percentage
Central Nervous System oxygen toxicity loading percentage.
Flashes Red when 100 or greater.
CNS
The CNS percentage is calculated continuously, even when
on the surface and turned off. When deco tissues are reset,
the CNS will also be reset.
CNS
The CNS value (short for Central Nervous System Oxygen
Toxicity) is a measure of how long you have been exposed
to elevated partial pressures of oxygen (PPO2) as a
percentage of a maximum allowable exposure time. As
PPO2 goes up, the maximum allowable exposure time goes
down. The table we use is from the NOAA Diving Manual
(Fourth Edition).
During a dive the CNS never decreases. When back at the
surface, a half-life of elimination of 90 minutes is used. So
for example, if at the end of the dive the CNS was 80%, then
90 minutes later it will be 40%. In 90 more minutes it will be
20%, etc. Typically after about 6 half-life times (9 hours),
everything is back close to equilibrium (0%).
18
RevA
11
1OO
Shearwater Perdix Operating Instructions
Diluent PPO2
Only displayed in CC mode. Displays in Flashing Red when
the partial pressure of the diluent is less than 0.19 or greater
than 1.65.
DilPPO2
.99
When performing a manual diluent flush, you can check this
value to see what the expected PPO2 will be at the current
depth.
Fraction Inspired O2 (FiO2)
FiO2
The fraction of the breathing gas composed of O2. This
value is independent of pressure.
Tissues Bar Graph
The tissues bar graph shows the tissue compartment inert gas tissue tensions based on the Bühlmann ZHL-16C model.
Note that VPM-B also tracks tensions in the same way.
The fastest tissue compartment is shown on the top, and the
slowest on the bottom. Each bar is the combined sum of the
nitrogen and helium inert gas tensions. Pressure increases
to the right.
The vertical black line shows the inert gas inspired pressure.
The boundary between the green and yellow zones is the
ambient pressure. The boundary between the yellow and red
zone in the ZHL-16C M-Value pressure.
Note that the scale for each tissue compartment above the
green zone is different. The reason the bars are scaled in
this way is so that the tissues tensions can be visualized
in terms of risk (i.e. how close they are as a percentage to
Bühlmann's original super-saturation limits). Also, this scale
changes with depth, since the M-Value line also changes
with depth.
16 tissue
compartments
Some Sample Tissues
Graphs
On surface (sat. with air)
After descent
On-gassing
Deep stop
Last deco stop
Inspired inert
M-Value pressure
gas pressure
Ambient pressure
Increasing pressure
19
.42
RevA
Shearwater Perdix Operating Instructions
Gradient Factor:
The deco conservatism value when the deco model is
set to GF. The low and high gradient factors control the
conservatism of the Bühlmann GF algorithm. See “Clearing
up the Confusion About Deep Stops” by Erik Baker.
GF
3O/85
VPM-B (and VPM-BG):
The deco conservatism value when the deco model is set to
VPM-B.
If the deco model is VPM-B/GFS, also displays the gradient
factor for surfacing.
Pressure:
The pressure in millibars. Two values are shown, the surface
(surf) pressure and the current (now) pressure.
The current pressure is only shown on the surface.
The surface pressure is set when the Perdix is turned on. If
the Altitude setting is set to SeaLvl, then surface pressure is
always 1013 millibars.
VPM-B
+3
VPM-BG
+3/90
Pressure mBar
1O13
SURF
Temperature:
The current temperature in degrees Fahrenheit (when depth
in feet) or degrees Celsius (when depth in meters).
Battery:
The Perdix’s internal battery voltage. Displays in Yellow
when the battery is low and needs replacement. Displays in
Flashing Red when the battery is critically low and must be
replaced as soon as possible. Also shows battery type.
TEMP
73°F
BATTERY
3.7V
LiIon
3.99V
Date
Time
28-Jun-12 16:31
Date and Time:
In the format dd-mon-yy
12 or 24 hour clock time.
Date
Serial Number & Version:
Each Perdix has a unique serial number.
The version number indicates the available features. The last
two numbers are the firmware version (V33in this image).
20
1O11
NOW
RevA
Time
28-Jun-12 4:31pm
SERIAL NO
Version
1234ABCD 2OO8O33
Shearwater Perdix Operating Instructions
Compass
The compass features:
•
•
•
•
•
•
1° resolution
± 5° accuracy
Smooth, high-speed refresh rate
User set heading marker with reciprocal
True North (declination) adjustment
Tilt compensated to ± 45°
Viewing the compass
When enabled, the compass is viewed by pressing the
SELECT (right) button once. Press SELECT again to
continue on to view the regular info screens.
Unlike the regular info screens, the compass never times out
back to the main screen. Pressing the MENU (left) button
brings up the Mark Heading option. Pressing MENU again
returns to the main screen.
Marking a Heading
To mark a heading, when viewing the compass press the
MENU (left) button. This brings up the "Exit Mark" menu.
Press the SELECT (right) button to mark the heading.
The marked heading is shown with a green arrow. When
within ±5° of the heading, the degrees display turns green.
The reciprocal heading (180° from marked heading) is
shown with a red arrow. When within ±5° of the reciprocal
heading, the degrees display turns red.
When more than 5° off the marked heading, a green arrow
shows the direction back to the marked heading. Also,
the offset degrees to the heading are displayed (16° in
the example image). This offset is useful when navigating
patterns. For example, a box pattern requires turns at 90°
intervals, while a triangle pattern requires 120° turns.
21
RevA
Shearwater Perdix Operating Instructions
Menus
Press MENU (left) button to step
through the menus.
Press SELECT (right) button to execute
command or enter sub-menu.
Menus display on the bottom row.
MENU button
SELECT
button
MENU button
Perdix Turns Off
SELECT
button
Enter
Select Gas
sub-menu
MENU button
Menus perform actions and allow settings to be changed
Starting from the main screen, pressing the MENU (left) button steps through the menus.
When all menus have been viewed, pressing MENU again will return to the main screen.
Pressing the SELECT (right) button when a menu is displayed, either performs that action or
enters a sub-menu.
If no buttons are pushed for 1 minute, the menu system will time-out, returning to the main
screen. Anything that had been previously saved will be retained. Anything that was in the
middle of editing will be discarded.
Adaptive Menus
Only menus necessary for the current mode are shown. This keeps operation simple,
prevents mistakes, and reduces buttons presses.
22
RevA
Shearwater Perdix Operating Instructions
The following sections show the menu structure in various operating modes.
Open Circuit Menu Structure
Main Screen
Surface
only
Turn Off
Sub-Menus
Select Gas
Dive Setup+
Define Gas
Conserv.
Dive Planner+
NDL Display
Brightness
Surface
only
Dive Log+
Display Log
Upload Log
Edit Log Number
Surface
only
23
System Setup+
RevA
Mode Setup
Display Setup
Deco Setup
Compass Setup
Center Row
System Setup
OC Gases
Advanced Config
Shearwater Perdix Operating Instructions
Closed Circuit (Int. PPO2) Menu Structure
Main Screen
Surface
only
Turn Off
Switch .7 > 1.3
Select Gas
Sub-Menus
Switch CC > OC
Dive Setup+
Surface
only
Dive Log+
Edit Low SP
Dive Planner+
Edit High SP
Conserv.
Define Gas
NDL Display
Display Log
Upload Log
Edit Log Number
Surface
only
System Setup+
Mode Setup
Deco Setup
Center Row
OC Gases
24
RevA
PPO2 Mode
Brightness
CC Gases
Auto SP Switch
Display Setup
Compass Setup
System Setup
Advanced Config
Shearwater Perdix Operating Instructions
Simple Example Dive
Here is an example of a simple OC air dive. It will help to introduce
the screen displays as the diver progresses, the dive starts, the depth
increases. The display is showing the computer programmed for open
circuit (OC) air.
As we pass through 30 feet, the time-to-surface (TTS) shows one
minute. This shows that the computer is expecting the diver to ascend
at approximately 30 feet per minute or 10 meters per minute. The dive
predictions are based on this ascent rate.
The no-decompression limit (NDL) starts off showing 99, but then
starts to show a smaller number as the depth increases. The 3rd
screen shows that we will go into deco in 12 minutes.
DEPTH
O
TIME
SURFACE
4hr39mn
.21
OC 21/OO O O
GasPPO2
O2/HE
DEPTH
3O
TIME
1
NDL
STOP
TTS
TIME
GasPPO2
O2/HE
.4
NDL
TTS
OC 21/OO 99 1
DEPTH
11O
TIME
3
STOP
TIME
GasPPO2
O2/HE
.9
NDL
TTS
OC 21/OO 12 3
We have now entered decompression. Our first stop, or ceiling, is
at 20 feet and we will need to remain there for up to one minute.
Although stops are shown in minutes, the computer will calculate and
change the ceiling in real time and the stop may be less than a minute.
DEPTH
O2/HE
TIME
RevA
STOP
TTS
TIME
GasPPO2
TIME
NDL
STOP
TTS
TIME
12O
8 2O2O 1
19 12
.33
OC 21/OO O 42
GasPPO2
O2/HE
25
NDL
12O
21 811 2O2O 1
.34
OC 21/OO O 42
DEPTH
When we clear the last stop, the stop depth and time goes blank, and
now we see a NDL of 99 minutes again. Once we surface, the depth
is 0 and a minute later when the computer comes out of dive mode,
the NDL goes to 0 as well.
TIME
GasPPO2
O2/HE
When we go shallower than our first stop, the stop depth starts to flash
red.
STOP
12O 8 2O 1
.97
OC 21/OO O 7
DEPTH
As we ascend, the ascent rate indicator shows about 20 fpm or 6
mpm.
TIME
DEPTH
TIME
NDL
STOP
TTS
TIME
9 15
.27
OC 21/OO 99 O
GasPPO2
O2/HE
NDL
TTS
Shearwater Perdix Operating Instructions
Gauge Mode
Gauge Mode turns the Perdix into a simple depth and time display
(a.k.a. a bottom timer).
Change to Gauge Mode in the System SetupMode Setup menu.
Since decompression tissues are not tracked in Gauge Mode, changing to or
from Gauge Mode resets the deco tissues.
Features:
• Extra-Large Depth Display (in feet or meters)
• Extra-Large Time Display (in minutes:seconds)
• Maximum and Average Depth on main screen.
• Stopwatch
• Resettable Average Depth
Gauge - Surface Display
The Gauge display is organized as.
• Depths along the left.
• Times along the right.
• Most important information (Depth, Dive Time) on the top row.
Gauge - Dive Display
Stopwatch
The Stopwatch is only available in Gauge Mode.
When diving, starting or stopping the Stopwatch is the first menu option.
When stopped, the word “Stopwatch” displays in red.
When non-zero, the stopwatch can be reset. Reset behavior depends on
state:
• If running when reset, it continues running, counting up again from 0.
• If stopped when reset, then it is set 0 and remains stopped.
Stopwatch Running
Resettable Average Depth
During a dive, the average depth can be reset.
While on the surface, the MAX and AVG values display the maximum and
average depth of the last dive. The AVG depth displayed on the surface is
for the entire dive, regardless of whether the reset average depth option was
used. The dive log also records the average depth for the entire dive.
26
RevA
Stopwatch Stopped
Shearwater Perdix Operating Instructions
Decompression and Gradient Factors
The basic decompression algorithm used for the computer is Bühlmann ZHL-16C. It has
been modified by the use of Gradient Factors that were developed by Erik Baker. We
have used his ideas to create our own code to implement it. We would like to give credit
to Erik for his work in education about decompression algorithms, but he is in no way
responsible for the code we have written.
The computer implements Gradient Factors by using levels of conservatism. The levels
of conservatism are pairs of number like 30/70. For a more detailed explanation of their
meaning, please refer to Erik Baker’s excellent articles: Clearing Up The Confusion
About “Deep Stops” and Understanding M-values. The articles are readily available on
the web. You might also want to search for “Gradient Factors” on the web.
The default of the system is 30/70. The system provides several settings that are more
aggressive than the default.
Don’t use the system until you understand how it works.
Graph from Erik Baker’s “Clearing Up The Confusion About Deep Stops”
27
RevA
Shearwater Perdix Operating Instructions
Menu Reference
Turn Off
The “Turn Off” item puts the computer to sleep. While sleeping, the
screen is blank, but the tissue contents are maintained for repetitive
diving. The “Turn Off” menu item will not appear during a dive on any
model. It will also not appear after a dive until the End Dive Delay
Time has expired to allow for a continuation dive.
DEPTH
O
TIME
SURFACE
.7
Turn Off
Switch Setpoint
This menu is only available in CC mode when PPO2 mode is set to Int.
(internal PPO2 Setpoints).
The internal PPO2 mode is used to calculate decompression for a
unconnected rebreather. In this case, the setpoints are switched in the
computer to approximate the rebreather setpoint.
During a dive the “Switch Setpoint” menu item will be the first item
displayed, since the “Turn Off” menu item is disabled when diving.
Pressing SELECT when this menu is displayed changes the PPO2
setpoint from the low setpoint to the high setpoint or vice-versa. To
redefine the PPO2 value of a setpoint, use the Dive Setup menu.
This menu item performs a manual switching of PPO2 setpoint. In
the System SetupAuto SP Switch menu, the Perdix can be setup
to automatically perform setpoint switches at programmable depths.
When auto setpoint switches are enabled, this menu item is still
available to provide manual control.
28
RevA
DEPTH
O
TIME
SURFACE
.7
Switch .7 > 1.3
DEPTH
O
TIME
SURFACE
1.3
CC 1O/5O O
O2/HE
NDL
TTS
22
Shearwater Perdix Operating Instructions
Select Gas
DEPTH
This menu item allows you to pick a gas from the gases you have
created. The selected gas will be used either as the breathing gas
in open circuit mode, or the diluent in closed circuit mode.
.7
Select Gas
Gases are always sorted from most to least oxygen content.
Use the MENU button to increment to the desired diluent/gas, then
press the SELECT button to select that diluent/gas.
If you increment past the number of gases available, the display
will fall back out of the “Select Gas” display without changing the
selected gas.
An ‘A’ will appear next to the currently active gas.
A gas that is off will be shown in magenta, but can still be selected.
It will be turned on automatically if it is selected. Off gases are not
used in decompression calculations.
O
TIME
DEPTH
O
TIME
SURFACE
SURFACE
.7
A1 CC On 21/OO
Next Gas
DEPTH
Select
O
TIME
SURFACE
.7
2 CC On 1O/5O
Next Gas
DEPTH
O
TIME
Select
SURFACE
.7
2 CC Off 1O/5O
Next Gas
Select
Radio Station Gases
For computer models that support open circuit and closed circuit operation, the system
maintains two sets of gases - one for open circuit and one for closed circuit.
The way they operate is very similar to the way car radios work with AM and FM stations.
When you are listening to an FM station and you push a station selection button, it will take
you to another FM station. If you add a new station, it will be an FM station.
Similarly, if you are in the AM mode, adding or deleting a station would add or delete an AM
station.
With radio station gases, when you are in open circuit, adding, deleting or selecting a gas will
refer to an open circuit gas. Just like the FM stations are selected when your radio is in FM
mode, the closed circuit gases are available in the closed circuit mode. When you switch to
open circuit, the gases available will be open circuit gases.
29
RevA
Shearwater Perdix Operating Instructions
Select Gas Menu Styles
Two styles of Select Gas menus are available, Classic and New.
Change between the two styles in the Adv. Config 1 menu.
Classic Style Select Gas
The classic Select Gas style is as described on the previous page.
• One gas is shown at a time.
• Press MENU to step through gases, and SELECT to select the
shown gas.
• Gases are sorted from highest O2% to lowest O2%.
• Stepping past the last gas will exit the menu without changing the
active gas.
• Upon entering the Select Gas menu, the first gas shown is always
the highest O2% gas.
Classic Select Gas
New Style Select Gas
The new style makes visualizing the gas list easier. It also reduces
button presses for deco gas switches.
• Shows all gases on the screen at once.
• Press MENU to step through gases, and SELECT to select the
pointed to gas.
• A gas must be selected to exit the menu (scrolling past last gas
wraps back to first gas).
• The active gas is shown with a white background.
• Turned off gases are shown in magneta (purple).
• Gases are sorted from highest O2% to lowest O2%.
• When diving and there is a deco stop, the first gas pointed to will
be the most appropriate gas (highest PPO2 less than 1.61). This
reduces button presses in most cases.
• On the surface or when no deco stops are needed, the first gas
pointed to will be the active gas.
New Style Select Gas
Off Gases are Magenta
Active Gas is White
30
RevA
Shearwater Perdix Operating Instructions
Switch to OC/CC
DEPTH
Depending on the current computer setting, this selection will show as
either “Switch CC > OC” or “Switch OC > CC”.
Pressing SELECT will select the displayed mode for decompression
calculations. When switching to open circuit while diving, the most
appropriate open circuit gas will become the breathing gas for
calculations.
At this point, the diver may want to switch to a different gas, but since
the diver may have other things to deal with, the computer will make a
“best guess” of which gas the diver would choose.
O
TIME
Surface
2 45
Hr
Mn
Switch CC > OC
DEPTH
TIME
Surface
O
2 45
1.3
Switch CC > OC
Hr
Mn
Dive Setup
The Dive Setup menus are available both on the surface and when
diving.
The values in Dive Setup+ can also be accessed in the Systems
Setup+ menu, but the System Setup+ menu is not available when
diving.
Pressing SELECT will enter the Dive Setup sub-menu.
DEPTH
O
O
This item allows you to set the low setpoint value. It will display the
currently selected value. Values from 0.4 to 1.5 are allowed.
A press of MENU will increment the setpoint.
RevA
Mn
Surface
2 45
Hr
Next
O
Mn
Edit
TIME
Surface
2 45
Hr
Mn
.7
Edit Low SP O.4
Change
31
Hr
.7
Edit Low SP O.7
DEPTH
Press the SELECT button when “Edit Low SP” is displayed and the edit
display will be shown. It is set at the lowest valid value for setpoint, .4.
TIME
Surface
2 45
.7
Dive Setup+
DEPTH
Low Setpoint
TIME
Save
Shearwater Perdix Operating Instructions
DEPTH
Another press of MENU will increment it again.
O
TIME
Surface
2 45
Hr
.7
Edit Low SP O.5
Change
If SELECT is pushed, the currently displayed setpoint will be
selected, and the display will return to the “Edit Low SP” menu item.
If the highest allowable value, 1.5, has been passed, the value will
return to 0.4.
High Setpoint
DEPTH
O
RevA
TIME
Surface
2 45
Hr
Next
O
Mn
Edit
TIME
Surface
2 45
Hr
Mn
.7
Edit High SP 1.3
Next
32
Save
.7
Edit Low SP 1.5
DEPTH
The high setpoint function works exactly like the low setpoint
function.
Mn
Edit
Shearwater Perdix Operating Instructions
Define Gas
The function allows you to set up 5 gases in Closed Circuit and 5
gases in Open Circuit. You must be in Open Circuit to edit open circuit
gases, and you must be in Closed Circuit to edit closed circuit diluents.
For each gas, you can select the percentage of oxygen and helium in
the gas. The remainder is assumed to be nitrogen.
Pushing SELECT when “Define Gas” is displayed presents the function
to define gas number 1.
DEPTH
TIME
STOP
O
.85 .86 .84
Define Gas
Next
DEPTH
Define
TIME
STOP
Edit
DEPTH
TIME
STOP
DEPTH
Edit
DEPTH
DEPTH
DEPTH
RevA
O2%
TIME
Next
STOP
TIME
O2%
TIME
Next
STOP
TIME
HE%
TIME
Next
STOP
TIME
O
.85 .86 .84
2 OC On 5O/OO
Change
33
TIME
O
.85 .86 .84
2 OC On 5O/OO
Change
Pushing SELECT on the last digit will finish editing that gas, and bring you
back to the gas number.
Any gases that have both oxygen and helium set to 00 will not be
displayed in the “Select Gas” function.
STOP
O
.85 .86 .84
2 OC On 5O/OO
Change
Pushing SELECT will lock in the current digit, and move on to the next
digit.
TIME
O
.85 .86 .84
2 OC On 5O/OO
Change
Each push of the MENU button will increment the digit being edited.
When the digit reaches 9, it will roll over to 0.
TIME
O
.85 .86 .84
2 OC On 5O/OO
Next Gas
Pushing SELECT will allow you to edit the current gas. The gas
contents are edited one digit at a time. The underline will show you the
digit being edited.
TIME
O
.85 .86 .84
1 OC On 99/OO
Next Gas
Pushing the MENU button will display the next gas.
TIME
HE%
Save
Shearwater Perdix Operating Instructions
DEPTH
Pushing MENU will continue to increment the gas number.
TIME
The computer will display all 5 gas entries available to allow you to
enter new gases.
Pressing MENU one more time when the fifth gas is displayed will
return you to the “Define Gas” menu item.
TIME
O
.85 .86 .84
2 OC On 5O/OO
HE%
Change
Note: The “A” denotes the active gas. You cannot delete the
active gas. If you try, it will generate an error. You can edit it,
but cannot set both the O2 and HE to 00.
STOP
DEPTH
TIME
Save
STOP
TIME
O
.85 .86 .84
A3 OC On 14/55
Edit
Next Gas
DEPTH
TIME
STOP
TIME
O
.85 .86 .84
5 OC On OO/OO
Done
Edit
Only turn-on gases you are carrying
Only turn on the gases you are actually carrying on the dive. With radio station gases,
the computer has a full picture of the OC and CC gases you are carrying and can make
informed predictions about decompression times. There is no need to turn gases off
and on when you switch from CC to OC, because the computer already knows what the
gas sets are. You should have the CC and OC gases you are actually carrying turned
on.
If you often use other gases, but not on this dive, you can enter the gas and turn it off.
You can turn gases on and off during a dive and you can also add or remove a gas during the dive if needed.
34
RevA
Shearwater Perdix Operating Instructions
Dive Planner
INTRODUCTION
• Calculates decompression profiles for simple dives.
• In closed-circuit (CC) mode, also calculates open-circuit (OC) bail-out (BO).
SETUP
Uses the current gases programmed into the Perdix, as well as the current GF low/high
settings. VPM-B dive planning is available on units with the optional VPM-B unlock.
Deco profile is computed for the current circuit mode (CC or OC).
ON THE SURFACE
Enter the dive bottom depth, bottom time, respiratory
minute volume(RMV) and PPO2 (closed-circuit only).
Note: Residual tissue loading (and CNS%) from recent
dives will be used in calculating the profile.
DURING A DIVE
Computes the decompression profile assuming the ascent
will begin immediately. There are no settings to enter.
(RMV is last used value)
Dive Plan Setup
LIMITATIONS
The Perdix Dive Planner is intended for simple dives. Multi-level dives are not supported.
The Perdix Dive Planner makes the following assumptions:
• Descent rate is 60ft/min (18m/min) and the ascent rate is 33ft/min (10m/min).
• For OC, the gas in use will be the gas with the highest PPO2 less than 1.40 for the bottom
gas, and 1.61 for deco gases (the deco gas max PPO2 can be changed in the Adv Config 1
menu).
• For CC, the gas in use will be the gas with the highest PPO2 less than 1.05.
• The planner will use the configured last stop depth.
• For CC, the PPO2 is constant for the entire dive.
• The RMV is the same while diving as during deco.
• Semi-closed uses a metabolic offset.
35
RevA
Shearwater Perdix Operating Instructions
The Dive Planner does not provide thorough validation of the profile. For example, it does not
check for nitrogen narcosis limitations, gas usage limitations, CNS percentage violations, or
isobaric counter-diffusion risks due to sudden helium switches. The user is responsible for
ensuring a safe profile is followed.
RESULT SCREENS
The results are given in tables showing:
•
•
•
•
Stp:
Tme:
Run:
Qty:
Stop Depth
Stop Time
Run Time
Gas Quantity
In feet (or meters)
In minutes
In minutes
in CuFt (or liters). OC and BO only
The first two rows are special, the first row showing the bottom time and the second showing
the ascent to the first stop. When diving, these two rows are not displayed.
Example Results Table for Closed-Circuit and Bailout.
If more than 5 stops are needed, the results will be split onto on several screens. Use the right
button to step through the screens.
For OC or BO profiles, a total gas consumption report is given.
36
Gas Usage Report
RevA
Shearwater Perdix Operating Instructions
The final result screen shows the total dive time, the time spent on deco and final CNS%.
Results Summary Screen
If no decompression is required, no table will be shown. Instead, the total No-DecompressionLimit (NDL) time in minutes, at the given bottom depth will be reported. Also, the gas quantity
required to surface (bailout in CC) will be reported.
No Decompression Results Screen
Conservatism
The conservatism settings (GF High and GF Low) can be edited in the Dive Setup menu.
While diving, only the GH High value can be edited. This allows changing the surfacing
conservatism during a dive. For example, if you worked much harder on the bottom segment
than expected, you may wish to add conservatism by reducing the GF High setting
DEPTH
O
TIME
.7
Conserv
Next
37
STOP
TIME
3O/7O
Edit
RevA
Shearwater Perdix Operating Instructions
NDL Display
DEPTH
The NDL Display option allows you to display four different values
during the dive. The display can be changed during the dive to
provide different information.
Pushing SELECT will make the NDL display editable. The first
choice available will be NDL. If you select NDL, the NDL will
always be displayed during the dive whether or not you have a
decompression ceiling.
The next selection is CEIL. With this setting, as long as the NDL
time is 0 (you have a decompression ceiling), the raw ceiling will be
displayed instead of the NDL. This is the equivalent of the ‘Man on
a rope’. It will show your ceiling without it being rounded up to the
next even 10 foot or 3 meter stop. Please note that there is very
limited information on the effects of following a continuous ceiling
instead of stopping at stops and only moving up to the next stop
when the stop has cleared.
O
TIME
STOP
TIME
.7
NDL Display NDL
Next
DEPTH
O
Edit
TIME
STOP
TIME
.7
NDL Display NDL
Change
DEPTH
O
Save
TIME
STOP
TIME
.7
NDL Display CEIL
Change
Save
It is the author’s opinion that all stops should be honored. It seems
intuitive that if you have bubbles, and you stop, you give the
bubbles an opportunity to be resorbed. If you continuously ascend,
the ambient pressure is continuously reduced which prevents
bubbles from shrinking. Because of this belief, the computer will
give one MISSED DECO STOP message during the dive and one
after the dive, and will flash the stop depth and time in red as long
as you are above the stop depth. It will use the increased gradient
though, and your calculated off-gassing will be faster than staying
at the stops.
The next option is to display the actual supersaturation gradient for
a pure Bühlmann (99/99) profile.
The selection is GF99. With this setting, as long as the NDL time is
0 (you have a decompression ceiling), the gradient will be displayed
instead of the NDL.
The number shown is the percentage of supersaturation. The
number is calculated by reference to the Ambient Pressure Line
and the M-Value line. It can be thought of as the current GF, but it is
different in a couple of ways. First, the current GF generates stops
rounded to the nearest 10 feet or 3 meters. So a gradient of 40 may
reflect a ceiling of 15 feet, but the computer will show a rounded-up
20 foot stop.
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DEPTH
O
TIME
STOP
TIME
.7
NDL Display GF99
Change
DEPTH
Save
TIME
STOP
TIME
34.7 15 24 1
1.3
CC 1O/5O 12 42
O2/HE
GF99 TTS
Shearwater Perdix Operating Instructions
This number can be used in several ways. First, it can be used to calculate an aggressive
ascent that still has some justification in decompression science. For example, if a diver were
to lose a significant portion of their gas and needed to get shallow fast, they could ascend until
they reached a gradient of 90, then stop until it dropped to 80, then ascend to 90 again, etc.
That would produce a Bühlmann-like profile with very little conservatism. In an emergency, that
may be an acceptable risk.
Another use might be to do a slower ascent on a dive to sightsee, but to stay in the
decompression zone by keeping the gradient above 0.
Another use would be to observe the rapidly
increasing gradient in the last 10 feet to the
surface and slow that ascent.
All of this is based on gradient theory
that may be completely false. There
is significant disagreement in the
decompression research community about
the nature and practice of decompression.
Any techniques described here should be
considered experimental, but the concepts
may be useful to the advanced diver.
The last selection is @+5. This feature was inspired by Dan Wible’s
CCR2000 computer (Thanks Dan!) It is the time-to-surface (TTS) if
you were to stay at the current depth for five more minutes. This can
be used as a measure of how much you are on-gassing or off-gassing.
DEPTH
O
TIME
STOP
TIME
.7
NDL Display @+5
Change
Save
For example, on a dive on a wreck, you go to the bottom until you accumulate the desired
decompression and TTS. After ascending to the second deck, you notice that the @+5 and
TTS are the same. That means that you can spend 5 minutes exploring this deck without
incurring more decompression.
Once you get to the top deck, the current has picked up. The line runs from the top of the deck
to the surface which is a distance of 30 feet/10 m. You see that your @+5 is 11 minutes and
your TTS is 15 minutes. That means that you can stay down out of the current for 5 minutes
and burn off about 4 minutes of deco. You may decide to accept the 80% decompression
efficiency and stay out of the current.
When your TTS is 10 minutes, you see that your @+5 is 9 minutes. Since the decompression
is not very efficient now, you go up the line and spend the last 10 minutes in the current.
39
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Shearwater Perdix Operating Instructions
Brightness
The display brightness has three fixed brightness settings plus an
Auto mode.
The fixed options are:
• Cave: Lowest brightness, suitable for dark environments.
• Low: Low brightness for long battery life.
• Med: Best mix of battery life and readability.
• High: Easiest readability, especially in bright sunlight.
Auto will use the light sensor to determine the brightness of the
display. The more ambient light there is, the brighter the display will
get. At depth, or in dark water, very little brightness is needed to
see the display.
The Auto setting works well in most situations.
The brightness of the display is the major determinant of battery
life. Up to 80% of the power consumption is to power the
display. When a low battery alert occurs, the display brightness is
automatically reduced to extend battery life.
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DEPTH
O
TIME
STOP
TIME
.7
Brightness Auto
Exit
Edit
Shearwater Perdix Operating Instructions
Dive Log Menu
DEPTH
O
Display Log
At the “Display Log” prompt, press SELECT to view the most recent dive.
The profile of the dive is plotted in blue, with decompression
stops plotted in red. The following information is displayed:
- Maximum and Average depth
- Dive number
- Date (mm/dd/yy)
- Start- Start of dive
- End- End of dive
- Length of dive in minutes
Press MENU to see the next dive, or SELECT to quit viewing
logs.
Press Back to see the list of dive logs, and next to select the
next dive and View.
TIME
STOP
TIME
STOP
TIME
.7
Dive Log
DEPTH
O
TIME
.7
Display Log
Next
Display
Oft
163ft
40min
Start 2:10PM
Back
Upload Log
See “Firmware Upload and Dive Log Download” instructions.
Logs are uploaded using Bluetooth. Selecting this menu item
starts the Bluetooth connection and then waits for commands
from a desktop or laptop computer.
Edit Log Number
The dive log number can be edited. This is useful if you want
the Perdix log numbers to match your lifetime dive count.
At the “Edit Log Number” prompt, press SELECT to begin
editing. While editing, use MENU to change the value of the
currently underlined digit, and SELECT to move to the next digit.
The next dive number will be +1 from the value entered here.
For example, if you enter 0015, then the next dive will be dive
number 16.
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DEPTH
O
TIME
STOP
TIME
.7
Edit Log Number
Next
DEPTH
O
Edit
TIME
STOP
TIME
.7
Log Number= OOOO
Next
Edit
Shearwater Perdix Operating Instructions
System Setup
DEPTH
System Setup contains configuration settings together in a convenient
format for updating the configuration before a dive.
System setup cannot be accessed during a dive.
O
TIME
STOP
TIME
.7
System Setup
However, many of the settings are also available during the dive in a
single line interface. Although all of the settings available in Dive Setup
are available in System Setup, not all settings in System Setup can be
edited in Dive Setup.
The MENU and SELECT buttons are context sensitive to each sub
menu and individual setting.
When cycling through the sub-menus, MENU will carry the user to the
next sub-menu, while SELECT will allow the user to edit the options in
this submenu.
Once the user has pressed SELECT to edit a submenu, MENU will
cycle the user through the different submenu listings, while SELECT
will let the user edit those listings.
Once the user has pressed SELECT to edit a submenu listing MENU
will be used to change the context sensitive variable, while the
SELECT button will be used to move to the next field. Once the user
has pressed SELECT through all the fields, the new user preferences
will be saved.
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Example Menu
‣Example
Example
Example
Example
Example
Next
O.OO
O.OO
O.OO
O.OO
O.OO
Edit
Example Menu
‣Example
Example
Example
Example
Example
Change
O.OO
O.OO
O.OO
O.OO
O.OO
Next
Shearwater Perdix Operating Instructions
Mode Setup
The first submenu of System Setup is Mode Setup.
Mode
Mode sets which breathing circuit configurations are available:
• OC/CC (closed circuit with open circuit bailout)
• OC Tec (with Trimix, default mode)
• OC Tec (air and Nitrox only)
• Gauge (e.g. bottom timer mode)
Important information for OPEN CIRCUIT divers
All Perdix models include Closed Circuit (CC) functionality.
Leaving CC mode enabled makes the Perdix more complex
and less optimized for OC diving.
Switch Mode from OC/CC to OC before performing an open
circuit only dive.
Also, when CC mode is available, then OC is treated as
bailout. This is why OC is shown as a yellow warning when CC
mode is available.
When changing to or from Gauge mode, the decompression tissues
are cleared. This is because when in Gauge mode the Perdix does not
know what gas you are breathing.
Salinity
Water type (salinity) affects how the measured pressure is converted to
depth. Settings:
•Fresh
•EN13319
•Salt
Fresh and Salt water differ by about 3%. Salt water, being denser, will
display a shallower depth for the same measured pressure versus the
Fresh water setting.
The EN13319 value is between Fresh and Salt. It is from the European
CE standard for dive computers, and is the Perdix’s default value.
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‣Mode Setup
High SP
Mode
Salinity
PPO2 Mode
Low SP
High SP
Next
O.7
1.3
OC/CC
CEIL
Salt
Int
0.7
1.3 Edit
Edit
Shearwater Perdix Operating Instructions
PPO2 Mode
‣Dive Setup
PPO2 mode is only available when CC is enabled.
On the Perdix this value cannot be edited and is always "Int" (internal
PPO2 setpoints)
Low and High Setpoints
The Low and High PPO2 Setpoints are only available when CC is
enabled.
Each setpoint can be set from 0.4 to 1.5.
The setpoints can also be edited, even during a dive, in the Dive Setup
menu.
44
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High SP
Mode
Salinity
PPO2 Mode
Low SP
High SP
Next
O.7
1.3
OC/CC
CEIL
Salt
Int
0.7
1.3 Edit
Edit
Shearwater Perdix Operating Instructions
Deco Setup
Deco Model
May just show Bühlmann ZHL-16 with gradient factors model, or it
may allow you to switch between GF and various types of VPM-B. The
choices will be available if you have unlocked VPM-B.
Conservatism
Can be adjusted in either the GF or VPM model.
For a more detailed explanation of their meaning for the GF algorithm,
please refer to Erik Baker’s excellent articles: Clearing Up The
Confusion About “Deep Stops” and Understanding M-values. The
articles are readily available on the web. VPM-B has conservatism
settings from 0 to +5, with higher numbers being more conservative.
‣ Deco Setup
Deco Model
Conserv(GF)
Last Stop
NDL Display
Next
GF
3O/7O
6m
CEIL
Edit
Last Stop
Allows you to chose where to do your last stop. The choices
are 10ft/3m and 20ft/6m. Note that this setting does not affect
decompression. It only makes the TTS prediction more accurate.
NDL Display
These options were previously covered in the Dive Setup+ section.
OC Gases
The next submenu is OC Gases. This menu allows the user to edit the
open circuit gases. The options contained here are the same as those
in the “Define Gases” subsection of the “Dive Setup” section contained
earlier in this manual. The interface conveniently displays all five gases
simultaneously.
‣ OC Gases
Next
1
2
3
4
5
OC
OC
OC
OC
OC
On
Off
Off
Off
Off
21/OO
OO/OO
OO/OO
OO/OO
OO/OO
Edit
On
Off
Off
Off
Off
21/OO
OO/OO
OO/OO
OO/OO
OO/OO
Edit
For a description of how to appropriately set each gas, please see the
above Define Gas section
CC Gases
The next submenu is CC Gases. This menu allows the user to edit the
closed circuit diluent gases. The options contained here are the same
as those in the “Define Gases” subsection of the “Dive Setup” section
contained earlier in this manual. The interface conveniently displays all
five gases simultaneously.
For a description of how to appropriately set each gas, please see the
above Define Gas section
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‣ CC Gases
A1
2
3
4
5
Next
CC
CC
CC
CC
CC
Shearwater Perdix Operating Instructions
Auto SP (Setpoint) Switch
This menu page is only available in CC mode when PPO2 mode is
set to internal (see Dive Setup page).
‣ Auto SP Switch
Up: O.7>1.3
Up Depth
Auto
O7Oft
Auto Setpoint Switch configuration sets up the setpoint switching. It
can be set up to auto switch up only, down only, both, or neither.
Down: 1.3>O.7
Down Depth
Next
Auto
O4Oft
Edit
First, you set the whether the “Up” switch occurs automatically
or manually. If “Up” is set to “Auto”, then you can set the depth at
which the auto switch occurs.
The menu options are the same for the down setpoint switch.
Up: O.7>1.3
‣Up Depth
Auto
O7Oft
Down: 1.3>O.7
Down Depth
Change
Auto
O41ft
Next
Example: Up: 0.7>1.3
= Auto, Up Depth = 70 ft.
Down: 1.3>0.7 = Auto, Down Depth = 41ft
The dives starts at the 0.7 setpoint. As you descend past
70ft, the setpoint switches “up” to 1.3.
You finish your bottom time, then begin ascending. When
you ascend above 41ft, it switches “down” to 0.7.
When a switch is set to “Auto”, you can always manually override
the setting at any time during the dive.
The automatic switches only occur when crossing the specified
depth. Say for example, the switch up depth is set to 50 ft. You start
the dive on the low setpoint, then as you descend past 50 ft, the
setpoint automatically switches up to high. If at say 80 ft you then
manually switch back to the low setpoint, the setpoint will remain
low. If you ascend shallower than 50ft then re-descend deeper than
50ft again, the automatic setpoint switch will occur again.
The Perdix enforces a 20 ft (6m) gap between switch up and
switch down depths to prevent rapid automatic switching between
setpoints for small depth changes.
The values 0.7 and 1.3 are shown as examples only. Other values
for the low and high setpoint can be adjusted in the Dive Setup
menu.
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Auto SP Switch
Auto SP Switch
Up: O.7>1.3
Up Depth
Auto
O7Oft
‣Down: 1.3>O.7
Manual
Change
Save
Shearwater Perdix Operating Instructions
Display Setup
Units
Two options are available:
• Feet: Imperial units (depth in feet, temperature in °F)
• Meters: Metric units (depth in meters, temperature in °C)
Display Setup
‣Units
Brightness
Altitude
Flip Screen
Feet
Auto
SeaLvl
Next
Edit
Brightness
Screen brightness can be set to fixed levels or an automatic setting.
Fixed options:
• Cave: Lowest brightness, suitable for dark environments.
• Low: Low brightness for long battery life.
• Med: Best mix of battery life and readability.
• High: Easiest readability, especially in bright sunlight.
The “Auto” option measures ambient light levels and then adjusts
the screen brightness to best performance. It provides maximum
brightness in bright sunlight, but then lowers brightess to save
battery life when the environment gets darker.
Altitude
The altitude setting when set to ‘Auto’ will compensate for pressure
changes when diving at altitude. If all your diving is at sea level,
then setting this to ‘SeaLvl’ will assume that surface pressure is
always 1013 mBar (1 atmosphere).
Display Setup
Units
‣Brightness
Altitude
Flip Screen
Feet
Med
SeaLvl
Change
Save
Display Setup
Units
‣Brightness
Altitude
Flip Screen
Feet
Auto
SeaLvl
Change
Save
If the Perdix measures the surface pressure to be less than 965
mbar, then the Altitude setting will be forced to "Auto" and cannot
be changed.
Determination of Surface Pressure
Accurate depth measurements and decompression calculations require knowing the
ambient atmospheric pressure at the surface. Regardless turn on method, the surface
pressure is determined the same way.
While in the off state the surface pressure is measured and saved every 15 seconds. A
10 minute history of these pressure samples is kept. Immediately after turn-on this history
is examined and the minimum pressure is used as the surface pressure. The surface
pressure is then remembered, and not updated again until the next turn-on.
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Shearwater Perdix Operating Instructions
Units
Brightness
Altitude
‣Flip Screen
Flip
Feet
Auto
SeaLvl
Display Setup
The Flip Screen is of limited use on the Perdix model, but can be
used if you wish to wear the Perdix such that the button are on the
top of the device.
Exit
Flip Screen
This function displays the contents of the screen upside down.
In the normal orientation, buttons are at the bottom of the display. If you flip the
display, the buttons will be up top when the Perdix is worn on the wrist.
48
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Shearwater Perdix Operating Instructions
Compass Setup
Compass View
The Compass View settings can be set to:
• Off: The compass is disabled.
• 60°, 90°, or 120°: Sets the range of the compass dial that
is visible on the main screen. The actual amount of arc that
there is room for on the sceen is 60°, so this may feel the
most natural. The 90° and 120° settings allow a wider range
to be seen at once. The default is 90°.
True North (declination)
In most locations, a compass does not point to True North,
but rather to Magnetic North. The difference in angle between
these two headings is called the magnetic declination (also
called magnetic variation), and varies around the world. The
declination in your area can be found on maps or by searching
online.
This setting can be set from -99° to +99°.
If you only need to match an uncompensated compass, or your
navigation is based on relative directions, this setting is not
necessary and can be left at 0°.
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Shearwater Perdix Operating Instructions
Calibrate
Calibration of the compass may be needed if the accuracy drifts
over time or if a permanent magnet or ferromagnetic metal (e.g.
iron or nickel) object is mounted very close to the Perdix. To be
calibrated out, such an object must be mounted with the Perdix
such that it moves along with the Perdix.
Calibrate the Compass Each Battery Change
Each battery has its own magnetic signature, mostly due to
its steel case. Therefore, recalibrating the compass when
changing the battery is recommended
Compare the Perdix with a known good compass or fixed
references to determine if calibration is needed. If comparing
against fixed references, remember to consider the local
deviation between Magnetic North and True North (declination).
Calibration is typically not needed when travelling to different
locations. The adjustment needed then is the True North
(declination).
When calibrating, rotate the Perdix smoothly through as many
3D twists and turns as possible in 15 seconds. Keep metal and
magnetic objects away during calibration. The calibration can
also be reset back to the factory values. After calibration, it is
recommended to compare the compass accuracy with a known
good compass or fixed references
Tips for a Good Compass Calibration
• Stay away from metal objects. For example, wrist watches, metal desks, boat
decks, desktop computers, etc. can all interfer with the Earth's magnetic field.
• Rotate to as many 3D positions as possible. Upside down, sideways, on edge,
etc.
• Compare with another compass (not a smartphone, those are terrible) to check
your calibration.
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Shearwater Perdix Operating Instructions
System Setup
Date
The first ‘System Setup’ changeable option is ‘Date,’ which allows
the user to set the current date.
Time
The next ‘System Setup’ changeable option is ‘Time’, which allows
the user to set the current time. The format can be set to AM, PM or
24 hour time.
Unlock Code
The next ‘System Setup’ changeable option is ‘Unlock’, which
allows the user to enter in an unlock in order to change models and
to set other features.
System Setup
14-Aug-2O12
‣Date
O3:28PM
Time
Unlock
Load Upgrade
Reset to Defaults
Next
Edit
System Setup
14-Aug-2O12
Date
12:28PM
‣Time
Unlock
Load Upgrade
Reset to Defaults
Next
Edit
System Setup
14-Aug-2O12
Date
12:28PM
Time
‣Unlock
Load Upgrade
Reset to Defaults
Next
Unlock
System Setup
Load Upgrade
Use this option to load firmware upgrades. This starts a Bluetooth
connection and then waits for commands from a laptop or desktop
computer.
14-Aug-2O12
Date
12:28PM
Time
‣8567OOOOOOOOOOOO
Load Upgrade
Reset to Defaults
Change
Next
Unlock
See the section ‘Firmware Upload and Dive Log Download’ for
detailed instructions.
Reset to Defaults
The final ‘System Setup’ option is ‘Reset to Defaults’. This will reset
all user changed options to factory settings and clear the tissues on
the Perdix. ‘Reset to Defaults’ cannot be reversed.
Note: This will not delete dive logs, or reset dive log numbers.
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System Setup
14-Aug-2O12
Date
12:28PM
Time
Unlock
Load Upgrade
‣Reset to Defaults
Exit
Reset
Shearwater Perdix Operating Instructions
Advanced Configuration 1
Advanced configuration contains items that will be used infrequently
and can be ignored by most users. They provide more detailed
configurations.
The first screen allows you to enter the advanced configuration area,
or to set the advanced configurations settings to their default.
Title Color
The title colors can be changed for added contrast or visual appeal.
Default is Cyan, with gray, white and blue also available.
End Dive Delay
Sets the time in seconds to wait after surfacing before ending the
current dive.
This value can be set from 20 seconds to 600 seconds (10 minutes).
Default is 60s.
This value can be set to a longer time if you want brief surface intervals
connected together into one dive. Some instructors use a longer end
dive delay when teaching courses. Alternatively, a shorter time can be
used to exit dive mode more quickly upon surfacing.
Battery Icon
The behavior of the battery icon can be changed here. Options are:
Surf+Warn: The battery icon displays always when on the
surface. During dive it displays only if there is a low battery
warning.
Always: The battery icon always displays.
Warn Only: The battery icon only appears when there is a low
battery warning (this is how the Predator operates).
Gas Select
The style of Select Gas menu. Either Classic or New. Classic style
shows one gas at a time in the large font. New style shows all gases at
once, but in the small font.
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Advanced Config
Enter Adv. Config
Reset Adv. Config
System Info
Battery Info
Done
Edit
‣Adv. Config 1
Title Color
Blue
End Dive Delay
O6Os
Bat Icon
Surf + Warn
Gas Select
Classic
Next
Edit
Shearwater Perdix Operating Instructions
Advanced Configuration 2
This section allows changing of PPO2 limits.
Warning: Do not change these values unless you understand the effect.
All values are in absolute atmospheres [ata] of pressure (1 ata = 1.013
Bar)
OC Min. PPO2
PPO2 displays in flashing red when less than this value. (Default 0.19)
OC Max. PPO2
PPO2 displays in flashing red when greater than this value. (Default
1.65)
OC Deco. PPO2
The decompression predictions (TTS and NDL) will assume that the
gas in use at a given depth is the gas with the highest PPO2 that is less
than or equal to this value. Also, the suggested gas switches (when the
current gas is displayed in yellow) are determined by this value. If you
change this value, please understand its effect. For example, if lowered
to 1.50, then oxygen (99/00) will not be assumed at 20ft/6m. (Default
1.61)
Note: Semi-closed (SC) PPO2 alarms and gas switch depths use the
OC values.
CC Min. PPO2
PPO2 displays in flashing red when less than this value. (Default 0.40)
CC Max. PPO2
PPO2 displays in flashing red when greater than this value. (Default
1.60)
Note: In both OC and CC mode, a “Low PPO2” or “High PPO2” alert is
displayed when the limits are violated for more than 30 seconds.
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‣Adv. Config 2
OC
OC
OC
CC
CC
Min.
Max.
Deco
Min.
Max.
Done
PPO2
PPO2
PPO2
PPO2
PPO2
O.19
1.65
1.61
O.4O
1.6O
Edit
Shearwater Perdix Operating Instructions
Firmware Upload and Dive Log Download
Bluetooth communications are used for both Firmware Uploading and Dive Log Downloading.
NOTE: Upgrading the firmware resets decompression tissue loading. Plan repetitive dives
accordingly.
DEPTH
TIME
O
.85 .86
Upload
Log
Next
STOP
TIME
.84
Upload
Start a Bluetooth connection by selecting the Upload Log menu.
The Perdix screen will switch from ”Initializing” to “Wait PC” which will have a countdown.
Now go back to the Shearwater Desktop. Click start from the open “Update Firmware Box”, or
“Download Log.” The PC will then connect to the Perdix, and send the new firmware.
The Perdix screen will give percentile updates of receiving the firmware, then the Personal
Computer will read “Firmware successfully sent to the computer”.
After receiving the new firmware, the Perdix will reset and display a message stating either
firmware update success or failure.
Warning: During the update process, the screen may flicker or go blank for a few
seconds. Do not remove the battery during the upgrade process.
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Shearwater Perdix Operating Instructions
Changing the Battery
NOTE: A large coin or washer is required for this section.
Remove the battery cap
Insert the coin or washer into the battery cap slot. Unscrew by turning counter clockwise until
the battery cap is free. Be sure to store the battery cap in a clean dry space.
Exchange the battery
Remove the existing battery by tilting the Perdix computer. Insert the new battery positive
contact first. A small diagram on the bottom of the Perdix shows the proper orientation.
Accepted battery types
The Shearwater Perdix can accept a wide variety of AA sized batteries. The Perdix can accept
any AA sized (or 14500 size) battery that outputs a voltage between 0.9V and 4.3V.
Reinstalling the battery cap
It is very important that the battery cap O-rings are clear of dust or debris. Carefully
inspect your O-ring for any debris or damage and gently clean. It is recommended that you
lubricate your battery cap’s O-ring on a regular basis with an O-ring lubricant compatible with
Buna-N (Nitrile) O-rings. Lubricating helps ensure that the O-ring seats properly and does not
twist or bunch.
Insert the battery cap into the Perdix and compress the battery contact springs. While the
springs are compressed rotate the battery cap clockwise to engage the threads. Be sure not
to cross thread the battery cap’s threads. Tighten the battery cap until snug and the Perdix
powers on. Do not over tighten the battery cap.
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Shearwater Perdix Operating Instructions
Battery Types
After changing the battery, a screen will prompt for the battery type to be entered.
The Perdix attempts to guess what type of battery is being used. If the battery type is incorrect,
it should be manually edited.
Having the battery type set correctly is important so that the Perdix can give low battery
warnings at the proper voltage levels.
Supported battery types are:
1.5V Alkaline: The common AA battery type that can be purchased at most supermarkets and
electronics stores around the world. Not rechargeable. Inexpensive and reliable, they provide
45 hours of operation. Recommended.
Alkaline Batteries Can Leak!
Alkaline batteries are especially prone to leaking corrosive battery acid when
completely discharged. Remove discharged batteries immediately, and do not store
your Perdix for more than 2 months with an alkaline battery installed.
1.5V Photo Lithium: Fairly common, but more expensive than alkalines. They provide about
60 hours of operation. Common brand is the Energizer Ultimate Lithium. Not rechargeable.
Good for use in very cold water. Recommended.
1.2V NiMH: Common rechargeable batteries used in digital cameras and photo flashes. Can
have high self discharge. Provide about 30 hours of operation per charge. Can die quickly, so
care should be taken to ensure sufficient charge prior to diving.
3.6V Saft: The Saft LS14500 lithium batteries provide very high energy density. However, their
high cost makes other battery types a better choice for most users. Provide about 130 hours of
operation. Can die quickly, so care should be taken to ensure sufficient charge prior to diving.
3.7V Li-Ion: Rechargeable14500 Li-Ion batteries provide about 35 hours of operation per
charge. Can be ordered from the internet. Have more gradual voltage drop as discharged, so
easier to determine remaining capacity than NiMH rechargeables. Good in cold water.
NOTE: Battery operating lifetimes are given with screen on medium brightness and at room
temperature. Higher brightness and lower temperature can reduce life. Lower brightness can
increase life.
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Shearwater Perdix Operating Instructions
Behavior on Battery Change
Settings
All settings are retained permanently. No loss of settings occurs when changing the
battery.
Clock
The clock (time and date) is saved to permanent memory every 16 seconds when the
Perdix is on, and every 5 minutes when off. When the battery is removed, the clock
stops running. Once the battery is replaced, the clock is restored to the last saved value
(so it is best to remove the battery while the Perdix is on for lowest error).
Quick battery changes will not require any adjustment, but the time should be corrected
if the battery is removed for more than a few minutes.
After replacing the battery a screen appears for quick adjustments to the time
The Perdix uses a highly accurate quartz crystal for time keeping. Expected drift is
about 1 minute per month. If you notice higher drift, it is likely due to clock stoppage
during battery changes, and is easily corrected at the time of a battery change (see
image above).
Decompression tissue loading
The battery may be safely changed between repetitive dives.
Like the clock, the decompression tissue loading is saved every 16 seconds to
permanent memory when on, and every 5 minutes when off.
When the battery is removed the tissues remain stored in the permanent memory
and are restored once the battery is replaced, allowing for battery changes between
repetitive dives. However, the Perdix does not know for how long the battery was
removed, so no surface interval adjustment is applied for the time that the battery is
removed.
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Shearwater Perdix Operating Instructions
For quick battery changes, the un-powered time interval is not significant. However, if
the battery is removed shortly after a dive and then remains out for a long period, then
residual tissue loading will remain when the battery is replaced. If you have not been
diving for more than 4 days, it is safe to reset the tissues to their default levels (System
Setup->Reset to Defaults->Tissues Only). Otherwise, just leave the tissues as is and
accept the slightly higher conservatism for the next dive.
After a battery change the restored tissues are shown (with shortcut to reset)
Resetting the deco tissues sets them to saturated with air at the
current atmospheric pressure
If at time of battery replacement any tissue is below saturated with air at the current
pressure, then that tissue is brought up to being saturated with air. This might happen
after a decompression dive that used 100% O2, where the faster tissues are often
completely depleted of inert gas loading. Bringing such tissues back up to saturated
with air after a battery change is the most conservative approach.
When deco tissues are reset, the following are reset:
- Inert gas tissue loadings set to saturated with air at current atmospheric pressure
- CNS Oxygen Toxicity set to 0%
- Surface Interval time set to 0
- All VPM-B values set to default levels
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Shearwater Perdix Operating Instructions
Error Displays
The system has several displays that alert to error conditions.
Limitations of Alarms
All alarm systems share common weaknesses.
They can alarm when no error condition exists (false positive). Or they can fail to alarm
when a real error condition occurs (false negative).
So by all means respond to these alarms if you see them, but NEVER depend on them.
Your judgement, education, and experience are your best defenses. Have a plan for
failures, build experience slowly, and dive within your experience.
Each of the alarms will display the message in yellow until dismissed. The error is dismissed
by pressing the SELECT (right) button.
DEPTH
For example. this message will appear if the average PPO2 goes
above 1.65 for more than 30 seconds.
TIME
45 5
1.68
TIME
GasPO2
Error
HIGH PPO2
Other errors you may encounter are shown in the table below.
STOP
Confirm
Highest priority error is listed first. if multiple errors occur simultaneously, the error with the
highest priority will be displayed. Clear that error by pressing the SELECT (right) button to see
the next error.
Error
Low PPO2
High PPO2
Missed Stop
59
Description
Solution
The PPO2 is below the limit set on
the Adv. Config. page (default 0.19)
The PPO2 is above the limit set on
the Adv. Config. page (default 1.65)
Change your breathing gas to one
safe for the current depth.
Change your breathing gas to one
safe for the current depth.
Descend to deeper than the
currently displayed stop depth.
Monitor for symptoms of DCS.
Use extra conservatism for future
repetitive dives.
A required decompression stop was
violated.
RevA
Shearwater Perdix Operating Instructions
Error
Description
Solution
Fast ascent
The ascent was sustained at faster
than 10m/min (33 feet/min).
Use a slow ascent rate. Monitor
for symptoms of DCS. Use extra
conservatism for future repetitive
dives.
Tissues Cleared
Low Battery Int.
The decompression tissue inert
gas loading has been set to default
levels.
The internal battery is low.
Plan repetitive dives accordingly.
Replace the battery.
Switch to a gas with a lower
PPO2 or ascend shallower
(decompression ceiling allowing).
High CNS
Central Nervous System (CNS)
toxicity clock high exceeded 90%.
Watchdog Reset
The computer has reset to recover
from an unexpected software
condition.
Please report to Shearwater
Research Inc.
Reset to Defaults
Not really an error, just notification
that the reset has been completed.
N/A
Not really an error, just notification
that a new unlock has been applied.
Firmware update failed, possibly
Upgrade Failed
due to a communications error or
corrupted file.
Other messages than those above
Various other system
may be shown for system level
level errors
failures.
New Unlock
N/A
Try the firmware upgrade again.
Contact Shearwater if problem
persists.
Please report to Shearwater
Research Inc.
The center row also shows permanent "Low PPO2" or "High PPO2" messages when the PPO2
is not in a safe range. These message will clear automatically once a safe PPO2 is restored.
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Shearwater Perdix Operating Instructions
Troubleshooting
Symptom
Troubleshooting
Time of day is not accurate
The Perdix uses a highly accurate quartz crystal for time
keeping. Expected drift is about 1 minute per month. If you
notice higher drift, it is likely due to clock stoppage during
battery changes. Adjust the time in the System menu.
Battery life is short
Battery dies without warning
Ensure the battery type setting is correct. The battery gauge
will not function correct if the setting does not match the
actual. This can be adjusted when the battery is changed.
Ensure the battery type setting is correct. The battery gauge
will not function correct if the setting does not match the
actual. This can be adjusted when the battery is changed.
Storage and Maintenance
The Perdix dive computer should be stored dry and clean.
Do not allow salt deposits to build up on your dive computer. Wash your computer with fresh
water to remove salt and other contaminants. Do not use detergents or other cleaning
chemicals as they may damage the Perdix dive computer. Allow to dry naturally before
storing.
Do not wash under high pressure jets of water as it may cause damage to the depth sensor.
Store the Perdix dive computer out of direct sunlight in a cool, dry and dust free environment.
Avoid exposure to direct ultra-violet radiation and radiant heat.
Servicing
There are no user serviceable parts inside the Perdix.
Do not tighten or remove the faceplate screws.
Clean with water ONLY. Any solvents may damage the Perdix dive computer.
Service of the Perdix may only be done at Shearwater Research, or by any of our authorized
service centers.
Your nearest service center can be found at www.shearwater.com
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Shearwater Perdix Operating Instructions
Specifications
Specification
Operating Modes
Perdix Model
OC Tec
OC Rec
OC/CC (internal PPO2)
Gauge
Bühlmann ZHL-16C with GF
VPM-B and VPM-B/GFS (optional)
Decompression Model
Display
Full color 2.2" QVGA LCD
with always on LED backlight
Pressure (depth) sensor
Calibrated Range
Accuracy
Crush Depth Limit
Surface Pressure Range
Depth of dive start
Depth of dive end
Operating Temperature Range
Short-Term (hours)
Temperature Range
Long-Term Storage
Temperature Range
Battery
Battery Operating Life
(Display Medium Brightness)
Communications
Compass Resolution
Compass Accuracy
Compass Tilt Compensation
Dive Log Capacity
Battery cap o-ring
Wrist Attachment
Weight
Size (W X L X H)
62
Piezo-resistive
0 Bar to 14 Bar
+/-20 mBar (at surface)
+/-100 mBar (at 14bar)
27 Bar (~260msw)
500 mBar to 1040 mBar
1.6 m of sea water
0.9 m of sea water
+4ºC to +32ºC
-10ºC to +50ºC
+5ºC to +20ºC
AA Size, 0.9V to 4.3V
User replaceable
45 Hours (AA 1.5V Alkaline)
130 Hours (SAFT LS14500)
Bluetooth Smary Ready
1°
±5°
Yes, over ±45° pitch and roll
Appoximately 1000 hours
Dual o-rings. Size: AS568-112
Material: Nitrile Durometer: 70A
2 x 3/4" Elastic Straps with Buckles, or
2 x Bungee Cord (3/16" diameter cord)
152 g
81mm X 71mm X 38mm
RevA
Shearwater Perdix Operating Instructions
FCC Warning
a) USA-Federal Communications Commission (FCC)
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses, and can radiate radio
frequency energy. If not installed and used in accordance with the instructions, it may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in
a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be
determined by tuning the equipment off and on, the user is encouraged to try and correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna
• Increase the distance between the equipment and the receiver.
• Connect the equipment to outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Any changes or modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.
Caution: Exposure to Radio Frequency Radiation.
This device must not be co-located or operating in conjunction with any other antenna or transmitter.
Contains TX FCC ID: T7VPAN10
Industry Canada Warning
b) Canada - Industry Canada (IC)
This device complies with RSS 210 of Industry Canada.
Operation is subject to the following two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired operation
of this device.
L‘utilisation de ce dispositif est autorisée seulement aux conditions suivantes :
(1) il ne doit pas produire d’interference, et
(2) l’utilisateur du dispositif doit étre prêt à accepter toute interference radioélectrique reçu, même si
celle-ci est susceptible de compromettre le fonctionnement du dispositif.
Caution: Exposure to Radio Frequency Radiation.
The installer of this radio equipment must ensure that the antenna is located or pointed such that it
does not emit RF field in excess of Health Canada limits for the general population; consult Safety
Code 6, obtainable from Health Canada’s website www.hc-sc.gc.ca/ewh-semt/pubs/radiation/radio_
guide-lignes_direct-eng.php#sc6
Contains TX IC: 216Q-PAN10
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Shearwater Perdix Operating Instructions
Contact
Shearwater Research Inc.
Headquarters
EU Service Centre
Narked at 90 Ltd.
104 - 334 E. Kent Avenue South,
Vancouver, BC
V5X 4N6, CANADA
Tel: +1 604.669.9958
info@shearwater.com
www.shearwater.com
15 Bentley Court, Paterson Rd,
Wellingborough, Northants
NN84BQ, UK
Tel: +44(0)1933 681255
info@narkedat90.com
US Rep & Service Center
Rebreathers USA, LLC.
Curt McNamee
Asia/Pac Rep & Service Center
Paul Trainor (Underwater
Obsession)
1316 142nd PL SE
Mill Creek, Washington
98012, USA
Tel: +1 425.418.1425
flyingcash@gmail.com
287 Happy Valley Road
Owhiro Bay, Wellington
NZ
Tel: +64.27.6128265
paul@technicaldiving.co.nz
Visit us on the web:
www.shearwater.com
www.facebook.com/DiveShearwater
www.twitter.com/DiveShearwater
www.youtube.com/shearwaterresearch
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Last Page
www.shearwater.com
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