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

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The amount of decompression Credit Time that you receive is dependent on Depth, with

slightly less Credit given the deeper you are.  You should stay slightly deeper than the Stop

Depth indicated until the next shallower Stop Depth appears.  Then, slowly ascend to, but

not shallower than that Stop Depth.

•  While in Decompression Mode, button operation and Alternate Displays are similar to

those described for No Deco Stops.

CONDITIONAL VIOLATION MODE

If you ascend shallower (Fig. 37a) than the required Decompression Stop Depth displayed

(Fig. 37b), the Down Arrow and STOP bar icons, and Total Ascent Time value will flash

until you descend below the required Stop Depth.  Current Depth and applicable bar

graphs will be displayed.

If you descend below the required Deco Stop before 5 minutes

have elapsed, operation will continue to function in Decompres-

sion Dive Mode.

No off gassing credit will be given during time above the Stop.

Once descent is made to below the Stop Depth, off gassing

credit begins, required Deco Stop Depths and Time will de-

crease toward zero, then operation will revert to the No Deco

Dive Mode.

ALT displays are similar to those for Deco.

Fig. 37 - CONDITIONAL

VIOLATION MAIN

b

a

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39

DELAYED VIOLATION MODE #1 (Fig. 38)

If you remain above a required Deco Stop Depth for more than

5 minutes, the full NiBG as well as Total Ascent Time and the

Down Arrow and STOP bar icons will flash until you descend

below the Required Stop Depth.  This is a continuation of a

Conditional Violation.

DELAYED VIOLATION MODE #2 (Fig. 39)

The Element cannot calculate decompression times for Stop

Depths much greater than 60 FT (18 M) and offers no indication

of how much time spent underwater would result in the need for

a greater Stop Depth.

If your Decompression obligation requires a Stop Depth between

60 FT (18 M) and 70 FT (21 M), the all segments of the NiBG

will flash.  Total Ascent Time will still be displayed.

You must ascend to just deeper than, and stay as close as

possible to 60 FT (18 M) without causing the Total Ascent Time

display to flash.

When the Required Stop Depth indicates 50 FT (15 M), etc., you

can ascend to those depths and continue decompressing.

Fig. 38 -  DELAYED

VIOLATION #1 MAIN

Fig. 39 -  DELAYED

VIOLATION #2 MAIN

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40

•  While in Conditional Violation Mode and Delayed Violation

Modes # 1 and # 2, button operation and Alternate Displays

are similar to those for Deco (or No Deco Stops).

DELAYED VIOLATION MODE #3 (Fig. 40)

If you descend deeper than 330 FT (99.9 M), the loaded NiBG

segments will flash, and the Current Depth and Max Depth

displays will only indicate 3 dashes ( - - - ).

Upon ascending above 330 FT (99.9 M), the real Current Depth

value will be restored, however, Max Depth will only display 3

dashes for the remainder of that dive.  Also, the Log for that dive

will only display 3 dashes as the Max Depth achieved.

VIOLATION GAUGE MODE

During a Dive, if a Deco Stop much greater than 60 FT (18 M) is

required, the Element would then operate with limited functions

in Violation Gauge Mode during the remainder of that dive and

for 24 hours after surfacing.

Violation Gauge Mode turns the Element into a digital instrument

without any Nitrogen or O2 monitoring functions.  Only Current

Depth, Max Depth, Elapsed Dive Time, and the Ascent Rate

Indicator will be displayed.  All segments of the NiBG and

O2BG will flash as a warning of this condition (Fig. 41).

Fig. 40 -  DELAYED

VIOLATION #3

Fig. 41 -  VIOLATION GAUGE

MODE

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41

Violation Gauge Mode would be preceded by entering Delayed

Violation Mode #2, or if High O2 occurs while in Deco.

The Element will also enter Violation Gauge Mode 5 minutes

after reaching the surface from a dive in which a Delayed

Violation occurred.

On the surface, Violation Gauge Mode displays the Surface

Interval, Temperature, the graphic Vio alternating with Time of

Day, Dive Number, and NiBG and O2BG with all segments of

both flashing (Fig. 46).  It does not provide the FO2, Plan, or

Time to Fly and Desaturate features.

The countdown timer that appears when you try to access Time

to Fly does not represent Time to Fly.  It is only provided to

inform you of the time remaining before normal operation can

resume with full features and functions.

NOTE:  In the event that a dive is made during the 24

hour period after surfacing, a full 24 hour surface

interval must then be served after that dive before all

functions are restored.

Fig. 46  - VIOLATION

GAUGE MODE (Surface)

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42

HIGH PO2

When partial pressure of oxygen (PO2) increases to 0.20 ATA

less than the PO2 Alarm Set Point, the graphic PO2 (in place of

DTR), and UP Arrow icon will appear on the Main Display (Fig.

47) until PO2 decreases.  Elapsed Dive Time, Current Depth,

and bar graphs will continue to be displayed.

If PO2 continues to increase and reaches the Alarm Set Point,

the graphic PO2 and UP Arrow icon will flash until PO2 de-

creases (Fig. 48).

•  Press/release the button momentarily (< 2 seconds) to view

the Alternate Displays (similar to No Deco Stop screens).

Fig. 47 - HIGH PO2

WARNING

Fig. 48 - HIGH PO2 ALARM

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