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

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The Time to Fly counter is provided to assist you with deciding when enough surface time

has elapsed to fly (or travel to higher elevations).

•  After a Surface Interval of 12 hours, you may choose to fly (or travel to higher eleva-

tions), provided that your dive profile(s) did not enter decompression.

•  If your diving involved decompression or a repetitive multi day profile, it is strongly

recommended that you wait a full 24 hours after your last dive to add a greater degree

of protection.

Pre Dive Planner

After a dive, the Planner displays adjusted No Decompression Limits (Fig. 54) based on

residual nitrogen calculated to be remaining from that and previous dives in the same

series.

Log Mode

The Element will store up to 12 dives in its Log for viewing.

Once the Log is full (12 dives), each subsequent dive will then

overwrite the oldest dive stored in the Log.  It is therefore sug-

gested that you transfer the Log's data to your log book at the

end of each day of diving.

Log data will not be lost when the battery is removed/replaced,

however, factory service and calibration will delete the data.

The first dive conducted each time the unit is Activated will be

#1, therefore there may be multiple #1 dives in the Log.

Fig. 54 - PLANNER

(adjusted NDLs)

0:19 if no

previous dive

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Each dive has up to 3 Log screens >> Dive Identifier (Preview),

Dive Data, and O2 Data (if a Nitrox dive).  Dives are displayed

in a reverse sequence that starts with the dive most recently

recorded, back to the oldest one stored.  The most recent dive

will always be the first shown in the sequence.

To access Log Mode -

>  Press/release the button momentarily (< 2 seconds) while the

unit is scrolling through the Surface Sequence.

>  The first screen (Dive Preview/Identifier) of the most recent

dive conducted will appear displaying (Fig. 55)  -

   •  Log Mode (book) icon

   •  Time of Day, that the dive started with clock icon

   •  Dive Number (for that activation period) with icon

>  While viewing the Preview screen, press/release the button

momentarily (< 2 seconds) to view the second screen.

Dive Data (the second screen) information includes (Fig. 56) -

•  Log Mode icon

•  Surface Interval - prior to that dive with clock/wave icon

•  Temperature - minimum during the dive with icon

•  Elapsed Dive Time (hr:min) with Dive mode icon

•  Maximum Depth - reached during the dive with icon

•  ASC - max ascent rate maintained for 4 consecutive seconds

•  NiBG - nitrogen loading at the end of the dive, segment

reflecting max loading during the dive will appear flashing.

Fig. 55 - LOG PREVIEW

Fig. 56 - LOG DIVE DATA

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>  Press/release the Button to view the third screen.

O2 Data (the third screen) information includes (Fig. 57) -

•  Log Mode icon

•  Graphic FO2 with FO2 Set Point (at bottom)

•  Maximum PO2 level reached during the dive with the MAX

icon and graphic PO2.

•  O2BG - showing oxygen accumulated at the time you

surfaced at the end of the dive.

>  To access the first screen of the previous dive's Log, press/

release the button momentarily (< 2 seconds).

>  To return to the Surface Sequence at any time while in Log

Mode, depress the button for 6 seconds, releasing it when

Surface Mode appears.

The unit will automatically revert to the Surface Sequence after 2

minutes if the button is not pressed to view another Log Screen.

AFTER THE FIRST 2 HOURS

Two hours after the last dive, the Surface Sequence will no

longer be displayed.  The Time to Fly and Desat countdown

screens (Fig. 58) will be displayed alternately for 3 seconds

each until they count down to 0:00 or another dive is made.

Fig. 57 - LOG O2 DATA

Fig. 58 - FLY/SAT

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To access other modes or enter settings -

•  Press/release the button to reactivate the Surface Sequence.

•  The unit will again revert to the Time to Fly and Desaturation

countdowns after 2 hours, if the button is not pressed.

•  Surface Interval Times greater than 9:59 (hr:min) will be

displayed only as Hours 10+, 11+, 12+, etc. (Fig. 59)

Wet Contacts

•  If the unit is not cleaned and dried prior to the Fly count-

down reaching 0:00 (hr:min), or making another dive, it will

shut off then automatically reactivate.

•  If no dive is made after activation, the unit would shut off

after 2 hours, then automatically reactivate again if wet,

repeating the action until cleaned and dried.

RESET (CLEAR) FEATURE

The Element is configured with a RESET feature that allows data to be

cleared, including Nitrogen and Oxygen calculations and Log Mode

entries.

WARNING:  Reset after a dive and subsequent use

for a repetitive dive conducted by the same diver

could result in serious injury or death.

Fig. 59 - SURFACE MODE

 (greater than 9:59)

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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 0000, 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)

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