Tusa IMPREX II IQ-400 Instruction Manual
  1. Manuals
  2. Brands
  3. Tusa Manuals
  4. Diving Instrument
  5. IMPREX II IQ-400
  6. Instruction manual

Tusa IMPREX II IQ-400 Instruction Manual

Dive computer
Hide thumbs
Table of Contents

Advertisement

Quick Links

Owner's Instruction Manual
01-1

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the IMPREX II IQ-400 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Tusa IMPREX II IQ-400

Summary of Contents for Tusa IMPREX II IQ-400

  • Page 1 Owner’s Instruction Manual 01-1...
  • Page 2 Quick Reference Guide CEILING MODE MODE SURF NO DECO DIVE DIVE TIME ¡C PLAN PLAN ¡F PLAN Arrows: Decompression Stop at the Ceiling Depth, Ascent Recommended, Must Descend Ascent Rate Indicator Current Time Display, Surface Interval/No Flying Time, No-Decompression Time, Ceiling Depth/Total Ascent Time Common Contact Temperature, Dive Counter, Maximum Depth During Diving, Day of the Month...
  • Page 3 The TUSA IQ-400 dive computer features: · Built-in calendar clock · Decompression capabilities · Personal adjustment · Adjustment for altitude · Four step ascent rate indicator · Reverse no-decompression time bar graph · Battery power indicator and low battery warning ·...
  • Page 4 WARNING READ THIS MANUAL! Carefully read this instruction manual in its entirety, including Section 1, “For Your Safety”. Make sure that you fully understand the use, displays and limitations of the IQ-400 dive computer. WARNING NO DIVE COMPUTER WILL PREVENT THE POSSIBILITY OF DECOMPRESSION SICKNESS (DCS)! All divers must understand and accept that there is no proce- dure or dive computer that will totally prevent the possibility of...
  • Page 5 WARNING NOT FOR PROFESSIONAL USE! TUSA dive computers are intended for recreational use only. The demands of commercial or professional diving often expose the diver to depths and prolonged exposures including multiday exposures that tend to increase the risk of decompression sick- ness.

  • Page 6: Table Of Contents

    ABLE OF ONTENTS NTRODUCTION UICK EFERENCE UIDE 1. F ..........6 AFETY 2.

  • Page 7: Ntroduction

    NTRODUCTION Congratulations on your choice of the TUSA IQ-400 Dive Computer.The IQ- 400 is a compact and sophisticated dive instrument that will give you years of trouble free and joyful diving. The IQ-400 dive computer will provide you with important information that you will need during, between, and after your dives.

  • Page 8: For Your Safety

    It is Not a Substitute for Certified Scuba Instruction including training in the principles of decompression. Do Not attempt to use the TUSA IQ-400 without reading this entire Instruction Manual. If you have any questions about the manual or the IQ- 400, contact your TUSA dealer before diving with the IQ-400.

  • Page 9: Decompression Dives

    WARNING DO NOT USE THIS INSTRUMENT TO CONDUCT DECOMPRESSION DIVES! TUSA does not recommend this instrument to be used to con- duct decompression dives. However, if through carelessness or emergency a diver is forced to exceed the no-decompression limits on a dive, the IQ-400 will provide decompression infor- mation required for ascent.

  • Page 10: Emergency Ascents

    Emergency Ascents In the unlikely event that the IQ-400 malfunctions during a dive, follow the emergency procedures provided by your certified dive training agency or, alter- natively, immediately ascend at a rate slower than 10 m/min [33 ft/min] to a depth between 3 and 6 meters [10 to 20 ft] and stay there as long as your air supply will safely allow.

  • Page 11: Dive Computer Limitations

    As a safety precaution TUSA recommends that divers using the IQ-400 should maintain no less than 10 minutes no-decompression time remaining at all...

  • Page 12: Getting

    Furthermore, the reader/diver is advised that any dive carries some risk of decompression sickness and neither the authors, nor TUSA will assume any responsibility or liability for accidents or injuries which might occur for any reason.

  • Page 13: Activation

    On the surface the IQ-400 is operated by simultane- ously touching the MODE/PLAN contact and one or two of the other contacts. When doing this, your CEILING finger tips should be wet or moist to establish the MODE MODE MODE MODE SURF SURF...

  • Page 14: Use Of Water Contacts

    3.1 Use of Water Contacts As described in Section 2.1, “Water Contacts”, the IQ- 400 is controlled with the MODE/PLAN,PLAN, and MODE contacts (Fig 3.1), as follows: MODE MODE MODE MODE PLAN PLAN PLAN PLAN Activation: PLAN Touch the PLAN and MODE/ PLAN contacts.

  • Page 15: Before Diving

    invisible marine growth that may create an unwant- ed electric current between the water contacts. It is therefore important that the IQ-400 be carefully CEILING washed in fresh water after the day’s diving is com- pleted. The contacts can be cleaned with a soft pen- SURF NO DECO cil eraser.

  • Page 16: Battery Power Indicator And Low Battery Warning

    Personal Adjustment and High Altitude Diving WARNING SURF SET THE CORRECT PERSONAL/ DIVE TIME ¡C ALTITUDE ADJUSTMENT MODE! PLAN When diving at altitudes greater than 700 m [2300 ft] the personal/ altitude adjustment feature must be Figure 3.4 correctly selected in order for the computer to cal- Ready Displays culate no-decompression status.

  • Page 17: Activation

    Table 3.1. Battery Power Indicator Battery Voltage Display After Activation Operation Figure over 3.0V five bar graph segments normal, new battery 3.3a) 3.0V – 2.9V four bar graph segments normal 3.3b) 2.9V – 2.8V three bar graph segments battery change 3.3c) is recommended 2.8V –...

  • Page 18: Diving

    automatically return to the READY display. Higher personal/ altitude adjustment modes will shorten the no-decompression time limits. These limits at different personal/ altitude adjustment mode selections are shown in Tables 6.1 and 6.2 in NO DECO Section 6.1, “OPERATING PRINCIPLES”. DIVE DIVE TIME Dive Numbering Shown...
  • Page 19 PLAN Figure 3.8 Green Zone (a) Diving Display As a safety precaution TUSA recommends that The present depth is 19.3m (63 ft) [d], the no decom- divers using the IQ-400 should maintain the no- pression time limit is 23 decompression bar graph within the green zone.

  • Page 20: Ascent

    3.3.3 Ascent Rate Indicator The ascent rate is shown graphically with a pointer in the upper left corner, next to the notation ASC RATE, as follows: NO DECO DIVE TIME Ascent rate Ascent Example in indicator speed Fig. no. PLAN No segments Below 5 m/min [16 ft/min]...

  • Page 21: Visual Alarms

    9 – 11 m/min (30 – 36 ft/min). NOTE TUSA highly recommends a safety stop at the end of every dive in the range of 3 m – 6 m [10 ft – 20 ft] for 3 – 5 minutes.

  • Page 22: Ives

    WARNING DO NOT USE THIS INSTRUMENT TO CONDUCT DECOMPRESSION DIVES! TUSA does not recommend this instrument to be used to con- duct decompression dives. However, if through carelessness or emergency a diver is forced to exceed the no-decompression limits on a dive, the IQ-400 will provide decompression infor- mation required for ascent.
  • Page 23 The ascent time (ASC TIME) is the minimum amount of minutes needed to reach the surface in a decompression dive. It includes: The time needed to CEILING ascend to the ceiling at an ascent rate of 10 m/min [33 ft/min] plus DIVE TIME The time needed at the ceiling (The ceiling is the...
  • Page 24 In this case it will be more manageable to maintain an addi- tional distance below to the ceiling, to make sure that the waves do not lift you above the ceiling. TUSA recommends that decompression takes place deeper than 4 m [13 ft], even if the indicated ceiling is shallower.

  • Page 25: A Tsurface

    WARNING NEVER LET THE CEILING DEPTH DESCEND DEEPER THAN 9 m (30 ft). When the ceiling is deeper than 9 m [30 ft], a blinking error warning Er will appear and when the 12 m [39 ft] ceiling is reached the IQ-400 CEILING PLAN will go into a permanent error mode.

  • Page 26: Flying After Diving

    minutes is shown next to the non-blinking airplane in the center window of the display (Fig. 3.18, b). If you start a new dive after less than 10 minutes at the surface, the IQ-400 interprets this as a continua- tion of the previous dive. The DIVING display will return, the DIVE number will remain unchanged, SURF DIVE TIME...

  • Page 27: Personal Adjustment And 3.6 Error Conditions

    12 hours before flight. TUSA recommends that flying be avoided until both the DAN guidelines and the IQ-400 wait to fly conditions are satisfied. 3.5 Personal Adjustment and High Altitude Dives The IQ-400 can be adjusted for increasing the conservatism of the mathemati- cal model or for diving at altitude.
  • Page 28 WARNING THE IQ-400 IS NOT INTENDED FOR USE AT ALTITUDES GREATER THAN 2400 m (8000 ft)! Traveling to a higher elevation can temporarily cause a change in the equilibrium of dissolved nitrogen in the body with the surroundings. It is recommended that the diver allow the body conditions to stabilize over a period of at least three hours before beginning to dive at altitude.
  • Page 29 WARNING DO NOT USE THIS INSTRUMENT TO CONDUCT DECOMPRESSION DIVES! TUSA does not recommend this instrument to be used to con- duct decompression dives. However, if through carelessness or emergency a diver is forced to exceed the no-decompression limits on a dive, the IQ-400 will provide decompression infor- mation required for ascent.

  • Page 30: Menu Based Modes

    At the surface mode, the CEILING/ASC TIME symbol will blink in the center window and at the dive planning mode a permanent Er is shown instead of no-decompression times . Extreme Ceiling Depth Or Decompression Range When the ceiling descends to the depth of 10 m [30 ft] or when the ASCent TIME is longer than 63 minutes, the Er warning will start to blink in the center window.

  • Page 31: Logbook Memory

    NOTE The menu based modes can be activated only when 10 minutes have elapsed after the dive. All menu based modes can be deactivated by the RETURN command, i.e. by connecting all three contacts simultaneously, or by immersing the IQ-400 in water.
  • Page 32 DISPLAY III (Fig. 4.4): • dive entry time and date The data of the most recent dive is shown first as DIVE 1 (the first dive in the memory). Preceding SURF dives are recalled by touching the MODE and DIVE TIME ¡C MODE/PLAN contacts.

  • Page 33: Dive History Memory

    4.2 Dive History Memory The Dive History is activated by touching the MODE and MODE/PLAN contacts until HIS appears. This mode will show (Fig. 4.6): CEILING • the maximum depth ever reached (a) • the total number of dives (b) DIVE DIVE TIME •...

  • Page 34: Personal /Altitudea

    2. Connect the PLAN and MODE/ PLAN contacts until all three personal/ altitude adjust- ment modes appear. Release your fingers immedi- ately at this point. The current mode is now blink- MODE MODE ing (Fig. 4.8). Wait at least two seconds but not PLAN PLAN more than four seconds before the next step.
  • Page 35 • the PLAN and MODE/ PLAN contacts change the values of the selected display. In these figures the contacts which are connected are MODE MODE shadowed. PLAN PLAN Thus, to correct the time, do as follows: PLAN 1. Activate the Time Setting mode by connecting the MODE and MODE/ PLAN contacts con-...

  • Page 36: Are And 5.1 Maintenance

    5. C ARE AND AINTENANCE The TUSA IQ-400 diving computer is a sophisticated precision instrument. Remember to treat it as such! It has been designed to withstand the rigors of scuba diving. It can be installed in a durable thermoplastic...
  • Page 37 first) by an authorized dealer. This service will include a general opera- tional check and battery replacement. The service requires special tools and training. Therefore, it is advisable to contact an authorized TUSA dealer for biennial service. Do not attempt to do any servicing that you are not trained for.

  • Page 38: Battery Compartment

    TUSA does not take any responsibility for dam- age caused by moisture in the battery compartment, if the instructions of this manual are not carefully followed. In case of a leak immediately bring the IQ-400 to an authorized TUSA dealer/ distributor. 6. T...
  • Page 39 Table 6.1 No-Decompression Time Limits (min) for Various Depths [m] for the First Dive of a Series. Personal/ high altitude adjustment mode Depth [m] Table 6.2 No-Decompression Time Limits (min) for Various Depths [ft] for the First Dive of a Series. Personal/ high altitude adjustment mode Depth [ft] U.S.
  • Page 40 longer than those that would be allowed by the U.S. Navy tables. WARNING THE USER SHOULD BE AWARE THAT ANY DIVE, INCLUDING ONES WITHIN THE U.S. NAVY TABLES OR IQ-400 LIMITS, DOES CARRY SOME RISK OF DECOMPRESSION SICKNESS. Compartments and Half Times When you dive with the IQ-400, it measures and displays depths and times as your dive progresses.

  • Page 41: Specifications

    U.S. Navy tables. Depth Limits WARNING TUSA STRONGLY RECOMMENDS THAT SPORT DIVERS LIMIT THEIR MAXIMUM DEPTH TO 40 m [130 ft]! However, the IQ-400 will calculate below that depth to provide a wide margin of flexibility if, through carelessness or emergency, you are forced to exceed this recommended depth limit for a dive.

  • Page 42: Temperature Display

    Depth Gauge: • Temperature compensated pressure sensor • Salt water calibrated (in fresh water the readings are about 3% smaller) • Depth display range: 0 to 90 m [295 ft] • Accuracy: ± 1 % FS (0 to 60 m [200 ft] at 20˚C [68˚F]) •...
  • Page 43 Include your name and address, proof of purchase and/or service registration card, as required in your country. The claim will be honored and the product repaired or replaced at no charge and returned in what your TUSA Dealer determines a reasonable amount of time, provided all necessary parts are in stock.

  • Page 44: G Lossary

    TUSA shall not be liable for loss of use of the product or other incidental or consequential costs, expenses or damage incurred by the purchase. All warranties not stated herein are expressly disclaimed.
  • Page 45 Decompression Any of a variety of maladies resulting either primarily or sickness secondary from the formation of nitrogen bubbles in tis- sues or body fluids, as a result of inadequately controlled decompression. Commonly called “bends” or “DCS”. Dive series A group of repetitive dives between which the IQ-400 indi- cates some nitrogen loading is present.
  • Page 46 — R IQ-400 ERVICE ECORD ETAIN WITH Date Purchase___________________________________________________ IQ-400 Serial Number ____________________________________________ Where Purchased ________________________________________________ City ___________________________________________________________ State __________________________________________________________ Name __________________________________________________________ Address ________________________________________________________ City ___________________________________________________________ State, ZIP ______________________________________________________ Other __________________________________________________________ Insp. Date __________________ Dealer Name_______________________ Insp. Date __________________ Dealer Name_______________________ Insp.
  • Page 47 TABATA U.S.A. INC. 2380 Mira Mar Ave., Long Beach, CA 90815, U.S.A. TEL: 562-498-3708 / FAX: 562-498-1390 TABATA AUSTRALIA PTY. LTD. Unit 11A, 86 Falconer Street, West Ryde, N.S.W. 2114, Australia TEL: 02-807-4117 / FAX: 02-808-1638 T.E.C. (TABATA EUROPE CORPORATION) B.V. NIEUW POORTSRAAT 84 A 1055 RZ AMSTERDAM HOLLAND TEL: 20-681-5955 / FAX: 20-682-4527 TABATA DEUTSCHLAND GMBH...

Table of Contents