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II
IQ-850
DIVE COMPUTER
OPERATING MANUAL

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Summary of Contents for Tusa IQ-850 DC-Sapience

  • Page 1 IQ-850 DIVE COMPUTER OPERATING MANUAL...
  • Page 2: Table Of Contents

    User Manual Contents IQ-850 Flow Chart and Information 1. Introduction 2. Key Features 3. Common Sense Warnings 4. Accessing Display Modes 5. Time Mode 6. Dive Set Mode 7. Dive Plan Mode 8. Log Profile Mode/Warnings 9. History Mode 10. PC Transfer Mode 11.
  • Page 3: Iq-850 Flow Chart And Information

    IQ-850 Flow Chart...
  • Page 4 IQ-850 Flow Chart cont.
  • Page 5 IQ-850 Flow Chart cont.
  • Page 6 IQ-850 Flow Chart cont.
  • Page 7 IQ-850 Flow Chart cont.
  • Page 8 IQ-850 Flow Chart cont.
  • Page 9: Introduction

    1. Introduction Congratulations on your choice of the TUSA IQ-850 Dive Computer. The IQ-850 is a compact and sophisticated dive instrument that will give you reliable, trouble free performance, dive after dive. The information in this manual has been developed for your safety.
  • Page 10 WARNINGS Before using the IQ-850, it is extremely important you read the following points as well as similar warning and caution notices that appear throughout this manual. Failure to do so could result in damage to or loss of equipment, serious personal injury, or death.
  • Page 11 WARNINGS The IQ-850 is designed to be used by only one diver at a time. Divers should not share a single IQ-850, or any dive computer, on the same dive. Additionally, no diver should lend his or her IQ-850 to anyone else until it calculates that no measurable residual nitrogen remains after previous dives, and displays neither the “Desaturation Time”...
  • Page 12: Accessing Display Modes

    Experts recommend divers wait at least 24 hours following any dive before flying in an aircraft or driving to altitude. Failure to allow sufficient surface interval before doing so may substantially increase the risk of Decompression Illness (DCI). Do not plan dives to depths deeper than those for which the IQ-850 is capable of displaying an available No-Decompression Limit.
  • Page 13: Time Mode

    5. Time Mode Time mode is the IQ-850’s default mode. In this mode the screen displays a minimum of the current date and time of day. Within 24 hours of surfacing from a dive, the IQ-850 will display additional information while in Time Mode. A description of the screens is shown below.
  • Page 14 • Surface time (SURF.T): This is the surface interval time after a dive. The timer is started from when the depth shown in Dive mode reaches 5 feet (1.4m) or less. If the depth changes back to 5 feet (1.4m) or more in less than 10 minutes, the previous dive is continued.
  • Page 15: Dive Set Mode

    6. Dive Set Mode To enter Dive Set mode from Time mode, press the A button 2 times until "DIVESET" is shown at the top of the display. Note: If the surface interval is less than 10 minutes the computer will not enter this mode.
  • Page 16 Operation of buttons during Dive Set mode. • Β: Press the B button to enter/select the function you would like to modify. • C: Use this button to change the value of the selection. If held down during the FO selection the value will scroll rapidly in one percent increments.
  • Page 17: Dive Plan Mode

    7. Dive Plan Mode To enter Dive plan mode from Time mode, press the A button three times until the "DIVEPLAN" screen is shown. Note: This mode cannot be entered if the computer is in an out of measurement range lock or a decompression stop violation lock. In both instances the computer will skip to the dive log mode.
  • Page 18 Depth Display Mode NDL (no decompression limit time) Depth Setting Figure 5 NDL (no decompression limit time) PGT Display Mode Figure 6 Operation of buttons during dive plan mode • A: Use this button to move to dive plan mode. If the button is held down for 2 to 3 seconds the computer will return to time mode.
  • Page 19: Log Profile Mode/Warnings

    8. Log Profile Mode To enter Log Profile mode from Time mode, press the A button five times until "LOG PROFILE” is shown. Description of the Log Profile functions The log profile mode records various data during a dive when the dive depth is at least 5 feet (1.5m) and the dive time is at least 3 minutes.
  • Page 20 • Average depth: This is the average water depth during the dive. If the depth is over 328 ft (99.9m), the display is ‘---’. • Maximum depth: This is the maximum depth recorded during a dive. If the depth is over 328 ft (99m) the display is ‘---’. •...
  • Page 21 Warning Displays: These are warnings that can occur during a dive. For further description of these warnings see the "dive mode" section. Alarm Displays Ιf the following warnings occur during dive mode they are stored in memory and displayed. Ascent rate warning: If the ascent rate warning is activated it is recorded in the log.
  • Page 22 warning: The PO icon blinks if the warning was active during the dive. (Fig. 12) Icon Blinks Figure 12 OLI warning: If the OLI reaches 8 bars, the warning is stored in memory and displayed in log mode. (Fig. 13) OLI Bar Icon Blinks Figure 13 Decompression dive warning: If the dive enters decompression,...
  • Page 23 Out of Measurement Range warning: If the computer entered out of range during the dive, then the event is recorded in memory and the entire display will blink during the log mode. (Fig. 15) All Segments Blink Figure 15 Operation of buttons during Log mode •...
  • Page 24: History Mode

    9. History Mode The IQ-850 records the total number of dives, maximum depth, and total accumulated dive time for Dive and Gauge modes in HISTORY. (Fig. 16,17) To enter HISTORY mode from Time mode, press the A button four times until the display reads “HISTORY”. To clear the dive history, press and hold the B+C buttons for 5 to 6 seconds.
  • Page 25: Pc Transfer Mode

    1 . PC Transfer Mode To enter PC transfer mode (data download requires USB cable part# IQ-800PC), press the A button six times from TIME mode. If surface time is less than 10 minutes after a dive, and there is no log and profile data, the computer will move to Time mode.
  • Page 26: Time Set Mode

    1 . Time Set Mode From TIME mode press the A button seven times until "TIMESET" is displayed, the lower right seconds indicator will flash. Note: If surface interval time is less than 10 minutes after a dive, the computer will not enter this mode. (Fig. 21) Description of display during Time et •...
  • Page 27: Dive Mode

    12. Dive Mode The IQ-850 will automatically enter dive mode when the E buttons come in contact with water. Description of functions during dive mode The are several different displays and functions available in DIVE mode including: non-decompression dive mode, decompression dive mode, safety stop time, gauge and out of measurement range condition.
  • Page 28 Decompression Dive Stop Depth Stop Time Total ascent To access screen 2 hold B button Figure 23 Safety Stop Timer This timer shows the recommended safety stop time while in dive mode. If the diver descends over 32 feet (9.9m), then comes up to a depth of 20 feet (6m), this value appears instead of NDL.
  • Page 29 Out of measurement range condition When exceeding a measurement range, the exceeded parameter becomes '---' display and all of the displays blink. The following situations will cause an Out of Measurement Range condition. Case 1: The water depth exceeds 328 ft(99.9m). Case 2: The dive time exceeds 599 minutes.
  • Page 30 • Nitrox Icon: This Icon is on when NITROX has been set at 22% or higher • Ascent rate bar graph: The greater number of indicators displayed, the greater the ascent rate. • Ascent rate warning: The SLOW icon and "SLOW" warning are displayed if the ascent rate is 7 or higher.
  • Page 31 • Decompression dive warning: When the NDL is exceeded and the IQ-850 changes to Decompression mode, the word DECO is displayed. This information is recorded in the dive log. • Decompression stop violation warning: if a depth shallower than the decompression stop depth is recorded, the DECO icon blinks and the "DECO"...
  • Page 32: Warning Screens

    Warning Screens The following warning screens may appear during a dive. If a warning appears the diver should take immediate action to correct the warning. Ascent Rate warning: If the ascent rate is exceeded, the SLOW icon, current depth, ascent rate bar graph, and SLOW mode icon will blink.
  • Page 33 • Decompression stop violation warning: When current depth is shallower than the indicated decompression stop depth, the IQ-850 will alert the diver with the display and the alarm. If the diver returns to the indicated water depth, the warning display stops blinking. This information is recorded in the dive log. (Fig.
  • Page 34 • Oxygen Limit Indicator warning: When the OLI graph reaches 7 or 8 bars, the IQ-850 responds with a flashing display and the alarm. There are two types of warnings, as described below. (Fig. 30) 7 bars displayed: The OLI bar graph will blink for 15 seconds.
  • Page 35 Out of Measurement range warning: If the computer enters this warning mode, all of the display segments will blink as shown below. The sound or vibrating alarm will operate twice for three seconds. The warning is recorded in the log. (Fig. 32) Figure 32 WARNING An IQ-850 displaying an “Out of Range”...
  • Page 36 Safety Stop warning: There are two types of safety stop warnings. The diver is alerted to the start of the safety stop by a blinking stop icon and SAFE indicator. If the safety stop has started and the depth becomes less than 5 feet (1.4m), the remaining stop time will also blink for a perriod of 10 minutes.
  • Page 37: Altitude Setting

    14. Altitude Setting Altitude setting:The IQ-850 automatically measures and calculates the current location's altitude and displays the corresponding altitude rank. The relation between altitude rank levels and altitudes are shown below. A new altitude measurement and calculation is made once every ten minutes. (Fig. 34) Altitude rank Altitude range 0-2952 feet (0-900m)
  • Page 38 Below are the Altitude Setting Icons for the rank of 0,1,2,3. If the altitude exceeds 19680 feet, the icon will blink and the Err icon will be displayed. (Fig. 35) altitude rank Figure 35 If the Altitude exceeds 19680 feet (6000 meters), the display shown below will appear.
  • Page 39: Battery Level Icon

    Remove the battery and inspect the compartment for signs of corrosion or water. If you find signs of corrosion, return the computer to your authorized TUSA dealer. Replace the old battery with a new one, taking care that the polarity is correct.
  • Page 40: Units Of Measurement

    If the IQ-850 does not appear to be functioning properly, in any manner, do not use it to dive. Return it to your authorized TUSA dealer for repair. Rinse the IQ-850 thoroughly in fresh water following every dive.
  • Page 41: Warranty

    (2) years from date of original purchase. Under this limited warranty, TUSA will either repair or replace, at its sole option, any original equipment or parts that fail to perform as intended. When this limited warranty is in force, it covers the cost of necessary replacement parts.
  • Page 42 TUSA specifically disclaims liability for any consequential, special or indirect damages arising out of the use of your dive computer. Please visit the TUSA CARE section of ww.tusa.com to regsiter your computer within 30 days of purchase.
  • Page 43 20. Alarm Table Alarm Cause Warning Ascent Rate Violation The ascent rate bar Sound: Warning graph is 7 or more. sounds for 3 seconds Vibration: active for 3 seconds Transition to deco Exceeding the NDL Warning sounds twice dive limits for three seconds Vibration is active Transition to deco...
  • Page 44 Alarm Cause Warning Ft/m Selection When changing the Confirmation sound unit of measure History Clear When clearing the Confirmation sound history Dive Mode prohibition When the E button Constant warning alarm is active during the sound. The alarm following conditions: will continue until the 1.
  • Page 45: Technical Specifications

    22. Technical Specifications (1) Accuracy • Time: average monthly variance ±30 seconds • Depth: ±3%+2ft (±3%+0.5m) • Temperature : ±4°F (±2.0℃) (2) Measurement range • Depth: 0.0-328ft (0.0-99.9m) • Dive time: 0-599 minutes • Altitude: 0-19680ft (0-6000m) Altitude measurement interval of 10 minutes (It excludes dive mode, time set mode, PC transfer mode.) •...
  • Page 46 Owners Information Date Purchased: IQ-850 Serial Number: Dealer: Address: City: State: Zip Code:...
  • 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 (Country Code=1) http://www.tusa.com/ TABATA AUSTRALIA PTY. L.T.D. 4D James Ruse Business Park, 6 Boundary Road, Northmead, NSW 2152 TEL (0)2-9890-4555 / FAX (0)2-9890-5222 (Country Code=61) http://www.tabata.com.au/...

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