Tusa iq-650 element computer manual 12-2917-r02



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52

RESET PROCEDURE

While the Surface Sequence is scrolling, press/release the button



(< 2 seconds)  to access the Log Mode displaying the first screen of

the most recent dive (Dive Preview/Identifier).

Press/release the button again (< 2 seconds) to access the second



Log screen (Dive Data) of the most recent dive.

Depress/hold the button while the second Log screen of the most



recent dive is being displayed to access the Reset screen.  The

graphics CLR and id will appear with the Key Code XXXX, the first 2

digits flashing (Fig. 60).  Release the button.

If necessary to change the first 2 digits, press/release the button



repeatedly (< 2 seconds each time) to select the correct number.

Depress the button for 2 seconds to save the first 2 digit number and



advance to the second 2 digits, flashing.

If necessary to change the second 2 digits, press/release the button



repeatedly (< 2 seconds each time) to select the correct number.

Once the proper Key Code has been entered, depress the button for



2 seconds to accept the Key Code, complete the Reset operation, and

turn the unit Off (i.e., Clearing it).

If an incorrect Key Code number has been entered, the unit will revert



to the Surface Sequence when the button is depressed, resuming

previous operation(s).

Fig. 60 - RESET (Clear)



53

GENERAL


54

CARE AND CLEANING

Protect your Element from shock, excessive temperatures, chemi-

cal attack, and tampering.  Protect the lens against scratches

with a transparent Instrument Lens Protector.  Small scratches will

naturally disappear underwater.

•  Soak and rinse the Element in fresh water at the end of each

day of diving, and check to ensure that the areas around the

low pressure (depth) sensor (Fig. 61a) and button are free of

debris or obstructions.

•  To dissolve salt crystals, use lukewarm water or a 50% white

vinegar/50% fresh water bath.  After removal from the bath,

place the unit under gently running water and towel dry

before storing.

•  Transport your unit cool, dry, and protected.



INSPECTIONS AND SERVICE

Your  Element should be inspected annually by an Autho-

rized TUSA Dealer who will perform a factory prescribed func-

tion check and inspection for damage or wear.  To keep the

product's warranty in effect, this inspection must be completed

one year after purchase (+/- 30 days).  TUSA recommends that

you continue to have this inspection performed every year to

ensure it is working properly.



To Obtain Service

Take your Element to an Authorized TUSA Dealer.

Fig. 61 - BACK OF CASE

a



55

NOTE:  The procedures that follow must be closely adhered to.  Damage due

to improper battery replacement is not covered by the unit's warranty.

MODULE REMOVAL FROM BOOT

If the Module is in a Console, bend the rubber Console Boot back to expose the edge of

the Module.  If the Boot is flexible enough to permit, you may bend it back far enough to

scoop the Module out with your finger.  Otherwise, it may be necessary to insert a blunt

screwdriver until the tip rests just underneath the Module.  DO NOT pry the Module from

the Console!  Slowly increase the pressure under the Module by releasing the tension on

the rubber Boot.  The Module will slide up the screwdriver and exit the Console.

If the Module is in a Wrist Boot, it will be necessary to peel the lips of the Boot downward

off the Module while applying pressure from underneath, working it out slowly.

BATTERY REPLACEMENT

The Battery Compartment should only be opened in a dry and clean environment  with

extreme care taken to prevent the entrance of moisture or dust.

To prevent formation of moisture in the Battery Compartment, it is recommended that the

Battery be changed in an environment equivalent to the local outdoor temperature and

humidity (e.g., do not change the Battery in an air conditioned environment, then take it

outside during a hot sunny day).

NOTE:  If the old Battery can be removed and the new one inserted within 8

seconds, nitrogen and oxygen calculations and settings, will be retained for

repetitive dives.



56

Battery Hatch Removal

•  Locate the Battery Compartment on the back of the Module.

•  While applying steady inward pressure on the center of the

Battery Hatch, rotate the Hatch Retaining Ring 10 degrees

clockwise using a flat blade screwdriver (Fig. 62) or  a

Battery Hatch Tool.

•  Lift the Hatch Ring up and away from the Housing, or turn

the Module over to allow it to drop out into your hand.

•  Remove the Battery Hatch.

Battery Removal

•  Remove the Retaining Bar located across the lower portion of

the Battery (Fig. 63a).

•  Remove the Hatch O-ring.  DO NOT use tools

•  Using care not to damage the Battery Contacts (Fig. 63b/c),

slide the Battery up and out of the Battery Compartment.



Inspection

•  Closely check all of the sealing surfaces for any signs of

damage that might impair proper sealing.

•  Inspect the Button, Lens, and Housing to ensure they are not

cracked or damaged.

•  If it is necessary to clean the Battery Compartment, flush it

and all components with a solution of 50% white vinegar

and 50% fresh water.  Rinse with fresh water, and allow to

dry overnight, or blow dry with a hair dryer (set at 'no heat').

Fig. 62 - RING REMOVAL

Fig. 63  - HATCH REMOVAL

a

b



c


57

WARNING:  If damage or corrosion is found, return

your Element to an Authorized TUSA Dealer, and DO

NOT attempt to use it until it has received factory

prescribed service.

Battery Installation

•  Slide a new 3 volt type CR2450 Lithium Battery, negative

( - ) side down into the Battery Cavity.  Slide it in from the

right side and ensure that it slides under the contact clip on

the left rim of the cavity (Fig. 64).

•  Orient the Retaining Bar across the lower portion of the

Battery and carefully push it down into position (Fig. 65).

Battery Hatch and Hatch Retaining Ring Installation

•  Replace the Hatch O-ring with a new one which must be a

genuine TUSA part.

•  Lightly lubricate the new Hatch O-ring with silicone grease

and place it on the inner rim of the Battery Hatch (Fig. 66).

Ensure that it is evenly seated.

•  Slide the Hatch Retaining Ring, top portion first (small open-

ing), onto your thumb.

•  Carefully place the Battery Hatch (with O-ring) into position

on the rim of the Battery Compartment, then press it evenly

and completely down into place with your same thumb.

Fig. 64  -INSERTING

BATTERY

Fig. 65 - INSERTING



RETAINING BAR

Fig. 66 - O-RING ON RIM OF

HATCH



58

• Maintain the Battery Hatch securely in place and, using your

other hand, slide the Retaining Ring down off your thumb

and into position around the Battery Compartment.

•  The tabs on the Retaining Ring fit down into the two slots

located at the 2 and 8 o'clock positions.

•  Using your fingers, turn the Ring counter clockwise 5 de-

grees until the tabs engage  (Fig. 67), then tighten it 5 more

degrees by turning it counter clockwise using the Battery

Hatch Tool (Fig. 68).

•  While tightening the Retaining Ring, exert continuous inward

pressure on it until it is secured in the proper position.  A

small symbol located on the Ring should be aligned with the

Locked symbol located on the Housing (Fig. 68a)



Inspection

•  Activate the unit and watch carefully as it performs a full

diagnostic and battery check, and enters Surface Mode.

•  Observe the LCD display to ensure it is consistently clear and

sharp in contrast throughout the screen.

WARNING:  If there are any portions of the display

missing or appearing dim, or if a Low Battery condi-

tion is indicated, return the Element to an Authorized

TUSA Dealer for a complete evaluation before at-

tempting to use it.

Fig. 68 -TIGHTENING the

RETAINING RING

Fig. 67 -ENGAGING the

RETAINING RING TABS

a



59

RETURNING THE MODULE TO BOOT

•  If the Boot was fitted with a Spacer and it was previously removed, replace the

Spacer into the Boot.

•  Orient the Module over the opening in the Boot, and dip the bottom edge into it while

pressing the top edge with the palm of your hand.  Stop pressing when the bottom

edge of the Module has just entered the Boot.

•  Correct the alignment of the Module as needed so that it is straight.

•  Press the Module completely into place with your thumbs, watching the alignment,

until it snaps into place.

Responsible

UNEXPECTED LOSS OF DISPLAYED INFORMATION

If your Element stops working for any reason, it is important that you have anticipated this

possibility and are prepared for it.  This is an important reason for not pushing

the No Decompression and Oxygen Limits, and a critical reason to avoid

entering Decompression.

If you dive in situations where your trip would be ruined or your safety would be jeopar-

dized by losing the use of your Element, a backup instrument system is highly recom-

mended.



60

ALTITUDE COMPENSATION

Atmospheric pressure decreases as Altitude increases above sea level.  Weather systems

and ambient temperature also affect barometric pressures.  Consequently, depth reading

instruments that do not compensate for the decrease in ambient pressure indicate depth

readings shallower than the depth they are actually at.

The Element automatically compensates for decreased ambient pressures for Altitudes

between 3,001 feet (916 meters) and 14,000 feet (4,270 meters).  Its program contains a

high altitude algorithm that reduces no decompression and oxygen exposure limits to add

a larger zone of caution.

The Element senses ambient pressure when it is activated, every 15 minutes while it is

activated, or every 30 minutes when it is not activated.  At an Altitude of 3,001 feet (916

meters ), it will automatically recalibrate itself to measure depth in meters (feet) of fresh

water rather than feet (meters) of sea water.  It will then readjust  the no decompression

and oxygen limits at additional intervals of 1,000 feet (305 meters).  When returning to

lower Altitudes, diving should not be conducted until the unit automatically clears of any

residual nitrogen and oxygen loading and resets to operate at the new lower Altitude.



WARNING:  The Element will not sense ambient pressures or provide Altitude

compensation when it is wet.  DO NOT dive at any different Altitude until the

unit shuts off and is reactivated at the new Altitude.

If the unit is activated at elevations higher than 14,000 feet (4,270 meters), it

will perform a diagnostic check followed by immediate shutdown.


61

CAN BE USED AS

Air Computer



Nitrox Computer



DIVE COMPUTER PERFORMANCE

Buhlmann ZHL-16c based Pelagic Z+ algorithm



No Deco limits closely follow PADI RDP

Decompression in agreement with Buhlmann



ZHL-16c and French MN90

No Deco Deep Stops - Morroni, Bennett



Deco Stops (not recommended) - Blatteau,

Gerth, Gutvik

Altitude - Buhlmann, IANTD, RDP (Cross)



Altitude corrections and O2 limits based on

NOAA tables

OPERATIONAL MODES

Activation/Diagnostic



Serial Number

Surface


Time to Fly Countdown

Desaturation Countdown



Pre Dive Planner

30 to 190 FT (9 to 57 M)

Dive Log (Preview, Dive Data, O2 Data)



Reset


Set FO2 (Air, 21 to 50%)

Set Wet Activation (On / Off)



Set Units of Measure (Imperial / Metric)

Set Hour Format (12 / 24)



Set Time (Hour, Minute)

Set PO2 Alarm (1.20 to 1.60 ATA)



Set FO2 50% Default (On/Off)

No Decompression Dive:



Main


Alt # 1


Alt # 2 -only if nitrox dive

Deep Stop - for dives deeper than 80 FT (24 M)



Safety Stop - for dives deeper than 30 FT (9 M)

Decompression Stop:



Main


Alt # 1


Alt # 2


Alt # 3 - only if a nitrox dive

Violation - Conditional, Delayed # 1, # 2, and # 3



High PO2


High O2


SPECIFICATIONS


62

DISPLAY RANGE/RESOLUTION

Numeric Displays:

Range:


Resolution:

Dive Number



0 - 12

1



Depth

0 - 330 FT (99.9 M)

1 FT (0.1 M)

Maximum Depth



0 - 330 FT (99.9 M)

1 FT (0.1 M)

FO2 Set Point



Air, 21 - 50 %

1 %


PO2 Value

0.00 - 5.50 ATA

.01 ATA


Dive Time Remaining

0:00 - 9:59 hr:min

1 minute


Total Ascent Time

0:00 - 9:59 hr:min

1 minute


Decompression Stop Time

0:00 - 9:59 hr:min

1 minute


Elapsed Dive Time

0:00 - 9:59 hr:min

1 minute


Surface Time

0:00 - 9:59 hr:min

1 minute


( > 9:59 hr:min SI is displayed as Hours only 10-, 11-, 12-, etc.)

Dive Log Surface Interval



0:00 - 25:59 hr:min

1 minute


Time to Fly

23:50 - 0:00 hr:min*

1 minute


(* starting 10 min after the dive)

Time to Desaturate



23:50 (maximum) - 0:00 hr:min* 1 minute

(* starting 10 min. after the dive)

Temperature



0 to 99°F (- 9 to 60°C)



Special Displays:

Occurrence

Diagnostic Display



After Manual Activation

Serial Number Display



After Diagnostics (if the Button is held depressed until screen appears)

Out of Range (- - -)



> 330 FT (> 99.9 M)

Gauge Mode Countdown Timer



23:50 to 0:00 hr:min (after Violation)

SPECIFICATIONS (CONTINUED)


63

BAR GRAPHS

Nitrogen Bar Graph

segments


Oxygen (O2) Bar Graph:

 segments

No Deco Normal zone



3

Normal zone



3

No Deco Caution zone



1

Caution zone



1

Decompression Warning zone



1

Danger zone



1

Variable Ascent Rate Indicator: 60 FT (18 M) & Shallower

Deeper than 60 FT (18 M)

segments

FPM


MPM

segments


FPM

MPM


0

0 - 10


0 - 3

0

0 - 20



0 - 6

Normal Zone



1

11 - 25


3.5 - 7.5

1

21 - 50



6.5 - 15

Caution Zone



2

26 - 30


8 - 9

2

51 - 60



15.5 - 18

Too Fast Zone (flashing)



3 (all)

> 30


> 9

3 (all)


> 60

> 18


OPERATIONAL PERFORMANCE

Function:

Accuracy:

Depth


±1% of full scale

Timers



1 second per day

Dive Counter:

Displays Dives #1 to 12, 0 if no dive made yet.



Resets to Dive #1, upon reactivation after having shut off.



SPECIFICATIONS (CONTINUED)


64

SPECIFICATIONS (CONTINUED)

OPERATIONAL PERFORMANCE (continued)

Dive Log Mode:

Stores 12 most recent dives in memory for viewing



After 12 dives, adds 13th dive in memory and deletes the first dive



Altitude:

Operational from sea level to 14,000 feet (4,270 meters) elevation



Samples Ambient Pressure every 30 minutes when not activated, when manually activated, and every 30 minutes

while activated. Does not sample Ambient Pressure while it is wet.

Adjusted No Decompression and O2 Limits and recalibration of depth readings at elevations between 3,001 feet



(916 meters) and 14,000 feet (4,270 meters) at intervals of 1,000 feet (305 meters).

Power:

•  Battery

1 - 3 vdc, type CR2450 Lithium battery

•  Shelf life

Up to 5 years

•  Replacement

User replaceable (annual recommended)

•  Life expectancy

100 dive hours (if 1 - 1 hour dive per dive day) to over

300 dive hours (if 3 - 1 hour dives per dive day)



Activation:

Manual - push button (recommended)



Automatic - by immersion in water (if set ON)

WET graphic indicates Wet Contacts are bridged (unit must be dried prior to transport or storage)



Cannot be manually activated deeper than 4 FT (1.2 M), if the Water Activation feature is set OFF.

Cannot be activated at elevations higher than 14,000 feet (4,270 meters)



Shut Off:

Automatically shuts Off if no dive is made within 2 hours after initial activation.  Reactivation required.



Automatically shuts Off 24 hours after last dive (will reactivate if wet).

Cannot be shut Off manually.




65

OPERATIONAL PERFORMANCE (continued)

Setting FO2:

Automatically set for AIR' upon activation



Remains set for AIR unless an FO2 numerical value is set

Nitrox Set Points from 21 to 50 %



If set for 21%, remains set for 21% until changed

If set for >21%, it reverts to 50% 10 minutes after the dive, if the FO2 Default is ON.  If the FO2 Default is OFF, the



value will remain at the value set for that activation period.

Operating Temperature:

The Element will operate in waters having temperatures between 32°F and 140°F (0 and 60°C).



At extremely low temperatures, the LCD may become sluggish, but this will not affect it's accuracy.  If stored or

transported in extremely low temperature areas (below freezing), you should warm the module and its battery with



body heat before diving.

SPECIFICATIONS (CONTINUED)


66

Tabata USA, Inc

2380 Mira Mar Avenue

Long Beach, CA 90815

Tel: 562-498-3708

Fax: 562-498-0415

www.tusa.com

info@tusa.com

Tabata Australia PTY Ltd.

Unit 11, 86 Falconer St.

West Ryde, N.S.W. 2114 Australia

Tel: 61-(0)2-9807-4177

Fax: 61-(0)2-9808-1638

www.tusa.com.au

info@tabata.com.au

Tabata Taiwan Co. Ltd.

54-8 Hsutsogang, Nankang Vil.

Tayuan Hsiang, Tao Yuan Hsien

Taiwan R.O.C.

Tel: 886-(0)3-386-5100

Fax: 886-(0)3-386-5103

info@mail.tabata.com.tw

Tabata Europe Corporation B.V.

Den Brielstraat 2 B, 1055 RV

Amsterdam, The Netherlands

Tel: 31-(0)20 68 15 955

Fax: 31-(0)20 68 24 527

www.tusa.nl

info@tusa.nl

Tabata Co. Ltd. Japan

1-3-17 Higashikomagata, Sumida-ku

Tokyo, Japan 130-0005

Tel: 81-(0)3-3624-2816

Fax: 81-(0)3-3623-9902

www.tusa.net

info@tabata.co.jp

TUSA INTERNATIONAL CONTACTS


67

SERVICE RECORD

Serial No. & Rev. No. __________________

Date of Purchase _____________________

Purchased From _____________________

Below to be filled in by an Authorized TUSA Dealer:

  Date

  Service Performed

            Dealer / Technician


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