Boss IQ400.4 Instruction Manual

Owner’s Instruction Manual01-1

Emergency AscentsIn the unlikely event that the IQ-400 malfunctions during a dive, follow theemergency procedures provided by your certified dive train

Dive Computer LimitationsWhile the IQ-400 is based on cur-rent decompression research andtechnology, the user/ diver mustrealize that the computer can

times during the dive. This is especially important for divers in poor physicalcondition, in cold water or other arduous conditions.Historically diver

On the surface the IQ-400 is operated by simultane-ously touching the MODE/PLAN contact and oneor two of the other contacts. When doing this, yourfinge

3.1 Use of Water ContactsAs described in Section 2.1, “Water Contacts”, the IQ-400 is controlled with the MODE/PLAN,PLAN, andMODE contacts (Fig 3.1),

invisible marine growth that may create an unwant-ed electric current between the water contacts. It istherefore important that the IQ-400 be carefull

Personal Adjustment and HighAltitude Diving If you are diving at higher altitudes, make sure that the altitude mode has beenset according to the altit

Table 3.1. Battery Power IndicatorAfter activation the Low Battery Warning is indicated by the battery symbol.If the battery symbol is displayed in th

automatically return to the READY display.Higher personal/ altitude adjustment modes willshorten the no-decompression time limits. Theselimits at diff

Each piece of information on the display is clearlymarked (Fig. 3.8). During a no-decompression dive,the following information will be shown:• the ava

Quick Reference GuideNO DECOSURFA0A1A2MAXMAXDIVE TIMEDIVEBATNOCEILINGASC¡C¡FAmSCSPEEDHISLOG ALT SET PLANMODEPLANMODEPLANArrows: Decompression Stop at

3.3.3 Ascent Rate IndicatorThe ascent rate is shown graphically with a pointer inthe upper left corner, next to the notation ASC RATE,as follows:Ascen

You must never surface with the SLOW warning on.If you do this, the warning will continue to flashuntil the unit deactivates itself in the normal man-n

• the ceiling descends to 12 m [39 ft]. A permanent error warning Er appears.In this mode the IQ-400 can only be used as a depth gauge and timer.The p

The ascent time (ASC TIME) is the minimumamount of minutes needed to reach the surface in adecompression dive. It includes: The time needed toascend t

Display Below Ceiling ZoneThe CEILING/ASC TIME symbol and upwardspointing arrow indicate that you are below the ceilingzone (Fig. 3.13). You should st

3.4 At Surface3.4.1 Surface IntervalAn ascent to any depth shallower than 1.8 m [6 ft]will cause the DIVING display to be replaced by thetwo SURFACE d

minutes is shown next to the non-blinking airplanein the center window of the display (Fig. 3.18, b).If you start a new dive after less than 10 minute

Flying or traveling to a higher altitude after a dive may significantly increasethe risk of decompression sickness.3.5 Personal Adjustment and High Alt

Altitude AdjustabilityWhen programming the IQ-400 for the correct altitude, the diver needs toselect the correct altitude mode according to Table 3.2.

with the personal/ altitude adjustment set at A1 or A2). The no-decompressionlimits are then shortened accordingly (Tables 6.1 and 6.2).3.6 Error Cond

The TUSA IQ-400 dive computer features:· Built-in calendar clock· Decompression capabilities· Personal adjustment· Adjustment for altitude· Four step

At the surface mode, the CEILING/ASC TIME symbol will blink in the centerwindow and at the dive planning mode a permanent Er is shown instead ofno-dec

All menu based modes can be deactivated by the RETURN command, i.e. byconnecting all three contacts simultaneously, or by immersing the IQ-400 inwater

DISPLAY III (Fig. 4.4):• dive entry time and dateThe data of the most recent dive is shown first asDIVE 1 (the first dive in the memory). Precedingdives

4.2 Dive History MemoryThe Dive History is activated by touching theMODE and MODE/PLAN contacts until HISappears. This mode will show (Fig. 4.6):• the

2. Connect the PLAN and MODE/ PLANcontacts until all three personal/ altitude adjust-ment modes appear. Release your fingers immedi-ately at this poi

• the PLAN and MODE/ PLAN contactschange the values of the selected display.In these figures the contacts which are connected areshadowed.Thus, to co

Remember to regularly check that the clock is ontime especially when traveling to different timezones, as the entry time of all dives is stored in the

The IQ-400 should be serviced every two years or after 300 dives (whichevercomes first) by an authorized dealer. This service will include a general op

5.2 Battery Compartment InspectionFrequently check for leaks in the battery compartment. This is important espe-cially after the battery has been repl

Table 6.1 No-Decompression Time Limits (min) forVarious Depths [m] for the First Dive of a Series.Personal/ high altitude adjustment modeDepth [m] A0

2WARNINGREAD THIS MANUAL!Carefully read this instruction manual in its entirety, includingSection 1, “For Your Safety”. Make sure that you fully under

longer than those that would be allowed by the U.S. Navy tables.Compartments and Half TimesWhen you dive with the IQ-400, it measures and displays dep

Altitude DivingThe atmospheric pressure is lower at high altitudes than at sea level. After trav-eling to a higher altitude, the diver will have addit

Depth Gauge:• Temperature compensated pressure sensor • Salt water calibrated (in fresh water the readings are about 3% smaller)• Depth display range:

Battery• One 3.0 V lithium battery (Varta CR 1/2 AA ), size 1/2 AA (ANSI) or 1/2R6 (IEC), spare part number K5546 + O-ring 26.7 mm x 1.78 mm 70 ShA,sp

purchase and in scope to the warranties expressed herein. TUSA shall not beliable for loss of use of the product or other incidental or consequential

Decompression Any of a variety of maladies resulting either primarily orsickness secondary from the formation of nitrogen bubbles in tis-sues or body

SERVICERECORD — RETAIN WITH IQ-400Date Purchase___________________________________________________IQ-400 Serial Number _______________________________

TABATA U.S.A. INC.2380 Mira Mar Ave., Long Beach, CA 90815, U.S.A.TEL: 562-498-3708 / FAX: 562-498-1390TABATA AUSTRALIA PTY. LTD.Unit 11A, 86 Falconer

3WARNINGNOT FOR PROFESSIONAL USE!TUSA dive computers are intended for recreational use only.The demands of commercial or professional diving often exp

TABLE OFCONTENTSINTRODUCTION QUICK REFERENCE GUIDE1. FOR YOUR SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INTRODUCTIONCongratulations on your choice of the TUSA IQ-400 Dive Computer.The IQ-400 is a compact and sophisticated dive instrument that will give y

1. FORYOUR SAFETYAlways remember that The Diver is Responsible for His or Her Own Safety!When used properly the IQ-400 is an outstanding tool for assi

When diving at higher altitudes (above 700 m / 2300 ft), it is essential that theentered altitude mode, i.e. maximum altitude limit of the IQ-400, exc