Uwatec Xtender User manual

1. Overview p2
1-1. Function Overview p2
1-2. Operation keys p3
1-3. Settings when the system is reset p3
2. Display and Operation
Specifications p4
2-1. LCD Panel Layout p4
2-2. Function of operation keys p4
3. Description of Mode States &
Operation Display p5
3-1. Time mode p5
3-2. Time Set mode p7
3-3. Alarm mode p11
3-4. Alarm Set mode p13
3-5. Dual Time mode p15
3-6. Dual Time Set mode p17
3-7. Dive Plan mode p19
3-8. Dive Set mode p22
3-9. Dive Log mode p25
3-10. History Clear mode p32
3-11. Dive Profile mode p33
3-12. PC Transfer mode p37
3-13. Dive mode p38
3-14. Locked states p54
4. Description of functions common
to all modes p57
4-1. Clock function p57
4-2. Daily alarm / time tone function p58
4-3. Altitude measurement judgment
function p58
4-4. Audible alarms p60
4-5. BLD detection function p62
4-6. Surface interval display function p63
4-7. Desaturation time display
function p63
4-8. PGT level and oxygen limited
indicator display function p63
4-9. Jump function p63
4-10. Auto return function p64
4-11. Display unit selector function p64
4-12. Default setting function p64
1
Contents

1. Overview
1.1 Function Overview
Xtender is a mobile dive computer for underwater diving that measures
depth during dives and, based on the measured values, calculates and dis-
plays a variety of dive data, including such critical data as a diver's body
oxygen level and the level of nitrogen that has dissolved into the diver's
body. The functions of the dive computer are outlined below.
•Clock function: internal full-auto calendar clock (with auto leap year recognition
and auto month-end recognition)
• Daily alarm function
• Time tone function
•Dual time function
• 12-hour clock/ 24-hour clock selector function
• EL backlight function
•Dive data functions:
depth measurement
dive time measurement
water temperature measurement
surface interval count
alarms
•Log memory function: Saves and displays logs for up to 30 dives
• History function: Saves and displays the total number of dives (up to 999) and
total dive time (up to 999 hours and 59 minutes)
• Profile function: Saves depths at set times during a dive, and displays
• Profile time (Pt) setting function
•PC download function: Transfers log and profile data to a PC
• Altitude measurement / altitude rank function
• User safety factor (USF) setting function
• m/ft selector function
2

1-2. Operation keys
• There are four keys for user operations: the A key, B key, C key, and D key.
• The E key serves as a water detection switch.
1-3. Settings when the system is reset
3
Item State
Mode Time mode
Time 12:00 00 sec. AM (12-hour clock)
Time (dual time) 12:00 00 sec. AM (12-hour clock)
Daily alarm 12:00 AM (chime: off)
Time tone Off
Ascent rate warning alarm On
Calendar January 1, 2003
Depth 0 m
Altitude rank Determined by measured value
after reset
FO2 setting Air (21%)
Inert gas level (PGT) 0 (none)
Oxygen limit indicator (OLI) 0 (none)
Desaturation time (DESAT) 0 (none)
Profile time (Pt) 30 sec.
User safety factor (USF) 0
Units m / °C (Celsius)
Log memory Continued from before
History memory Continued from before
Profile memory Continued from before
Other data memory All cleared (0)

2. Display and Operation
Specifications
2-1. LCD Panel Layout
2-2. Function of operation keys
• Operations are performed with the push-keys (the A key, B key, C key, and
D key) and the water detection switch (E key).
4
Key Main Function
A key Changes the mode
B key Lock button
C key Changes the column to be adjusted / UP button
D key EL backlight button / DOWN button
E key To Dive mode
Returns from Dive mode (at a depth of 1.4 m or less)

3. Description of Mode States &
Operation Display
3-1. Time mode
• Time mode is the default state during normal use and during surface intervals.
• All display segments flash when the dive computer is locked in the out-of-
range state or when it is locked in the decompression stop violation state.
• The demand displays for the dual time clock, DESAT, and surface interval
interfaces appear while the C key is pressed.3-1-1. Display
3-1-2.Key operations
5
<Normal> <Surface Interval State>
<Time Demand display (Normal)> <Time Demand display (Surface Interval)>
Current day of
the week
Current
Month & day
Current time
Time tone flag
Daily alarm
flag Oxygen limited indicator
PGT level Battery
(currently hidden)
Dual
time Mode
indicator
Desaturation
Time
Surface interval
Nitrox flag
Altitude rank

3-1-3.Description of Time mode functions
(1) Clock function
• Keeps time, and displays a calendar and the current time.
(2) Demand display function
• Press the C key to invoke the demand display.
(3) EL backlight function
• The electroluminescent backlight illuminates for 2 to 3 seconds after the C key
or D key is pressed.
• When the C key is entered, the demand display simultaneously appears.
• Continuously pressed and held keys are ignored. (The backlight illuminates for
2 to 3 seconds from the time the key is first pressed.)
• Input from the C and D key is ignored while the backlight is illuminated. (The
6
Key Entry / State Time Surface interval of
under 10 minutes
A key To Alarm mode
→
B key To Time Set mode Invalid (audible
alarm)
C key pressed Time demand display
and backlight on
→
D key Backlight on
→
C & D key Alarm test
→
E key: water detection switch To Dive mode
→
E key (when BLD is detected,
an altitude rank error occurs,
locked in the decompression
stop violation state, locked in
the out-of-range state)
Invalid (audible alarm
sounds while ON)
→

backlight goes off 2 to 3 seconds after the key is first pressed.)
• If a mode changing key is pressed while the backlight is on, the backlight
immediately goes off and the selected mode is invoked.
(4) Alarm test function
•Simultaneously press the C key and D key to test the audible alarm.
(5) Lock state reset function
•In the out-of-range lock state and decompression stop violation lock state,
simultaneously press and hold the C key and D key for 15 seconds to clear the
lock state and access the normal state.
3-2. Time Set mode
• Time Set mode is used to set the current time, the current date, and the time
format (12- or 24-hour clock).
• Time Set mode cannot be accessed until a surface interval of at least 10
minutes has elapsed.
3-2-1.Display
3-2-2.Key operations
7

3-2-3.Description of Time Set mode functions
(1) Selecting columns to be adjusted
• Press the C key to select the column to be adjusted.
8
Current year
Current time
(reset digit flashes)
Current
month & day
Key Entry
/State
Set
Seconds
Set MInutes Set Hour Set Ye a r Set Month Set Day Set Time
Format
A key Invalid
→→→→→→
B key To Time
mode
→→→→→→
Ckey
To
minute
setting
To hour
setting
To year
setting
To month
setting
To d ay
setting
To clock
format
setting
To seconds
setting
Dkey Reset 00–59
MInute
setting
0–23 Hour
setting
2003-2050 Year
setting
1–12 Month
setting
Day
setting
Toggle
between 12h
& 24h
D key
pressed Invalid
Minute setting
(Fast-forward)
Hour setting
(Fast-forward)
Year setting
(Fast-forward)
Month setting
(Fast-forward)
Day setting
(Fast-forward)
Invalid

• The columns are selected in the following order:
second →minute →hour →year →month →day →
12/24-hour clock selection →second →… (loop)
• The selected column flashes.
• Columns continue to flash at the same pace during data adjustment, even if
a valid key entry is made.
(2) Adjustment method
• Columns are incremented by a value of 1 each time the D key is pressed.
•Pressing and holding down the D key for 1 to 2 seconds speeds up D key entry
(fast-forwarding).
a) Adjusting the seconds display
Pressing the D key once between 0 and 29 seconds causes the seconds
to be rounded down to 0 without changing the minutes column. Pressing
the D key once between 30 and 59 seconds causes the minute column to
be rounded up. (One minute is added to the minute column).When the
9
Key Entry
/State
Set Seconds Set
MInutes
Set
Hour
Set Year Set
Month
Set Day Set
Time
Format
C & D key Fully illuminat-
ed display
→→→→→→
No key operated
for 2–3 minutes
To Time mode
→→→→→→
E key: water detec-
tion switch
To Dive mode
→→→→→→
E key (when BLD
is detected, an
altitude rank
occurs, locked in
the decompression
stop violation state,
located in the out-
of-range state)
Invalid (Alarm
sounds while
on)
→→→→→→

10
minute column shows 59 minutes, a one is added to the number in the
hour column.The day, month, and year columns are similarly increment-
ed. For example, if the seconds column is reset on December 31, 2003, at
23 hours, 59 minutes, and 45 seconds, the time will change to January 1,
2004, 0 hours, 0, minutes, 0 seconds.
b) Adjusting the day display
Months that have 31 days can be set to any day up to 31.
Months that have 30 days can be set to any day up to 30.
February can be set to any day up to 28, except in a leap year, when it
can be set up to the 29th.
(Days that do not exist, such as June 31, November 31, and so forth, are
not displayed.)
When the day is being adjusted, the month column does not change even
after the last day in the month is passed. (The day loops, without affect-
ing the month.)
c) Adjusting the month display
The end of the month is controlled during adjustment of the month col-
umn, and days that do not exist are handled as follows. If the dive com-
puter indicates the 31st day of a month when the display is reset to a
month with 30 days, the day column will indicate the first day of that
month, since the 31st day does not exist.
Examples:
If the D key is pressed once when the dive computer indicates May 31,
the date will change to June 1 (because there are not 31 days in June).
If the D key is pressed once when the dive computer indicates January
30, the date will change to February 1 (because February 30 does not
exist).
Note: In the case of a leap year, if the D key is pressed once when the
dive computer indicates January 29, the dive computer will indicate
February 29. The year column does not change when the month column
changes from December to January. (The month loops, without affecting
the year column.)

d) Adjusting the year display
The year can be set from 2003 up to 2050. (After passing 2050, the year
display loops back to 2003.) Leap years are automatically detected.
(3) Carrying of numbers during adjustments
• Numbers are carried over normally.
• Except when the seconds setting is being adjusted, numbers are not carried
over to the next highest place during adjustments. For example, when the D
key is used to adjust the minutes setting from 59 minutes to 00 minutes, the
hour column is not changed. Or, when the D key is used to adjust the hour set-
ting from 23 hours to 0 hours, the day does not change.
(4) Selecting the 12- or 24-hour clock
• Either a 12-hour clock format or a 24-hour clock format can be selected.
Toggle between the 12-hour and 24-hour clock formats by pressing the D key.
• In the 12-hour format, an "A" appears from the hours of 12:00 a.m. to 11:59
a.m., and a "P" appears from the hours of 12:00 p.m. to 11:59 p.m.
(5) Full illumination function
• Simultaneously pressing the C and D keys causes the entire display to light
up.
• The dive computer does not automatically return to Time mode from the fully
illuminated screen.
• Pressing any key while the screen is fully illuminated invokes Time mode.
3-3. Alarm mode
• Alarm mode turns the daily alarm and time tone ON/OFF.
• All display segments flash when locked in the out-of-range state or when
locked in the decompression stop violation state
3-3-1.Display
11

3-3-
2.
Key
operations
*1 After a key is operated in Alarm mode (for example, the C key was pressed to set the
alarm, the B key was used to access and then return from Alarm Set mode, or the D key
was pressed to turn on the backlight), the dive computer jumps to Time mode when the A
key is pressed. (This function is hereafter referred to as a "jump function.")
12
Key Entry / State Alarm Mode
A key To Dual Time mode
To Time mode after key operation *1
B key To Alarm Set mode
C key Sets the alarm
D key Backlight on
No key operated for 2 - 3 minutes To Time mode
E key: water detection switch To Dive mode
E key (when BLD is detected, an
altitude rank error occurs, locked
in the decompression stop viola-
tion state, locked in the out-of-
range state)
Invalid (audible alarm sounds
while ON)
Mode
character
display
Daily alarm clock
Current time
NItrox flag
Daily alarm
flag
Time tone flag
(currently hidden)
Mode
indicator

3-3-3.Description of Alarm mode functions
(1) Daily alarm/time tone setting function
• Pressing the C key switches the daily alarm and time tone ON/OFF.
(Daily alarm : Time tone) = (OFF:OFF) →(ON:OFF) →(OFF:ON) →(ON:ON)
→(OFF:OFF) →…(loop)
• The daily alarm flag lights up when the daily alarm is turned ON. The time tone
flag is lights up when the time tone is turned ON.
• When they are ON, the alarm flag and the time tone flag are on in all modes
except Log mode, History Clear mode, Dive Profile mode, and PC Transfer
mode.
3-4. Alarm Set mode
• A mode for setting the daily alarm clock
3-4-1.Display
13
Mode
indicator
Mode
character
indicator
Daily alarm clock (reset digit flashing)
Current time

3-4-2. Key operations
*1 For the 12-hour clock format, set from 1 to 12.
3-4-3.Description of Alarm Set mode functions
(1) Selecting the column to be adjusted on the daily alarm clock
• Press the C key to select the column to be adjusted.
• The columns are selected in the following order:
Minute column →Hour column →Minute column →…(loop)
•The selected column flashes.
14
Key Entry / State Daily Alarm
Minute column setting
Daily Alarm
Hour column setting
A key Invalid
→
B key To Alarm mode
→
C key To daily alarm hour
column setting
To daily alarm minute
column setting
D key 00 – 59 min. setting 0 – 23 hour setting*1
D key pressed continuously Minute setting
(fast-forward)
Hour setting
(fast-forward)
No key operated for 2–3 minutes To Time mode
→
E key: water detection switch To Dive mode
→
E key(when BLD is detected,
an altitude rank error occurs,
locked in the decompression
stop violation state, locked in
the out-of-range state)
Invalid (Audible alarm
sounds while ON)
→

(2) Adjustment method
• A value of 1 is added each time the D key is pressed.
• Adjustments are speeded up if the D key is held down for 1 to 2 seconds.
• If the daily alarm is OFF at the time the daily alarm clock setting is changed,
the daily alarm is automatically turned ON.
(3) Carrying numbers during adjustment
• Numbers are not carried over to the next column during adjustments. For
example, if the D key is used to change the minutes setting from 59 minutes to
00 minutes, the hour column does not change.
3-5. Dual Time mode
•A mode for selecting dual time
•All display segments flash when locked in the out-of-range state or when
locked in the decompression stop violation state
3-5-1.Display
15
<Normal Screen> <After Dual Time Selection>
Dual time
clock
Dual time
month & day
Current time
Mode indicator
Daily alarm flag
Altitude rank

3-5-2.Key operations
3-5-3.Description of Dual Time mode functions
(1) Dual time functions
• In addition to the current time, the dive computer can display the time in one
other time zone. (This function is known as "dual time.")
• Dual time is set within ±23 hours and 30 minutes of the current time.
16
Key Entry/State Dual Time Surface Interval
of Under 10 min. When Locked
A key To Dive Plan mode
To Time mode
after key operation
→
To Dive Log mode
To Time mode
after key operation
B key To Dual Time Set
mode
Invalid
(audible alarm)
To Dual Time Set
mode
C key Dual time selection Invalid
(audible alarm)
Dual time selection
D key Backlight on
→→
No key operated for
2–3 minutes
To Time mode
→→
E key: water detection
switch
To Dive mode
→
Invalid (audible alarm
sounds while ON)
E key (when BLD is
detected, an altitude
rank error occurs,
locked in the decom-
pression stop
violation state, locked
in the out-of-range
state)
Invalid (audible
alarm sounds
while ON)
→→

(2) Dual time selector function
• Press the C key to toggle between the time zones (dual times).
• If the surface interval is less than 10 minutes, dual time cannot be switched,
and an alarm sounds when the C key is ON.
3-6. Dual Time Set mode
• Dual Time Set mode is used to set the dual time clocks.
• If the surface interval is less than 10 minutes, Dual Time Set mode cannot be
accessed.
3-6-1.Display
17
Dual time clock (flashing)
Dual time date (flashing)
Daily alarm flag
Current time
Mode indicator

3-6-2.Key operations
3-6-3.Description of Dual Time Set mode functions
(1) Adjustment method
• Press the C key once to add 30 minutes.
•Press the D key once to subtract 30 minutes.
•The adjustable range is up to ±23:30. Key entries after the time has been
adjusted up to the limit are ignored. For example, if the current time is 14:23 on
February 15, the C key can be used to adjust dual time up to 13:53 on
February 16. Once that time setting has been reached, no additional time can
18
Key Entry / State Dual Time Set
A key Invalid
B key To Dual Time mode
C key Dual time clock UP (30 min)
C key pressed and held Dual time clock UP (fast-forward)
D key Dual time clock DOWN (30 min)
D key pressed and held Dual time clock DOWN (fast-forward)
No key operated for 2 - 3 minutes To Time mode
E key: water detection switch To Dive mode
E key (when BLD is detected, an
altitude rank error occurs, locked in
the decompression stop violation
state, locked in the out-of-range
state)
Invalid (audible alarm sounds while
ON)