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COMMANDER
Owner's Manual
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www.divecochran.com
Cochran
English - Imperial
Ver: CmdrAir-1.02
Manual Part Number: 4100811
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Summary of Contents for Cochran COMMANDER
- Page 1 Cochran COMMANDER Owner's Manual English - Imperial Ver: CmdrAir-1.02 Manual Part Number: 4100811 For your records, please fill in the following: Serial Number: _________________________ Your Name: ____________________________ Your Contact: __________________________ ______________________________________ ______________________________________ Purchase Date: _________________________ Purchase Place: ________________________ Address: ______________________________...
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Page 3: Product Introduction
PC for extracting information or configuring the unit, and determining water conductivity. When Contacts 1 & 2 are shorted, the COMMANDER can detect the difference between wet fingers, metal objects, fresh water, salt water, and a PC interface probe. -
Page 4: Main Operating Modes
Contacts 1 & 2 are bridged with wet fingers, the unit will stay on for one full hour. The COMMANDER will not turn on if the altitude is higher than 15,000 feet, the batteries are less than 1.6 volts, or a fault is detected during the self-test. -
Page 5: Surface Interval
SURFACE INTERVAL: After completion of the Self-Diagnostic mode or after the Post Dive Interval following a dive, the COMMANDER enters the Surface Interval. The Screen displays, if applicable; current Surface Time, the previous dive’s Maximum Depth, the previous dive’s Bottom Time, Dive of Day number, current Time to Fly, Altitude and Temperature. -
Page 6: Dive Mode
COMMANDER actually senses and computes extremely small altitude changes and hence, is called “Seamless”. The term “Barometric Altitude” is used instead of just “Altitude” because the COMMANDER measures Barometric Pressure to determine Altitude. Barometric Altitude can vary from actual Altitude by over +/- 1000 feet! What is important to the body when diving is Barometric Altitude. -
Page 7: Ascent Rate Bar Graph
There is no compensation above 75 degrees F. Bottom Time will begin once the COMMANDER senses that the diver has descended below five feet (see Training Mode) and continues until the diver has ascended above three feet. - Page 8 ® Via the Analyst PC Interface, the Ascent Rate Alarms and Bar Graph can be set to the users preferences. The first option is a VARIABLE-BY-DEPTH Ascent Rate. When on, the Ascent Rate Alarm is determined by depth. As the diver ascends to shallow depths, the Maximum Ascent Rate is lowered.
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Page 9: Decompression Mode
DECOMPRESSION MODE: Should a no-decompression limit be overstayed, the COMMANDER will enter the Decompression Mode. In this mode, the Ceiling digits will display the depth at which the diver must stop and not ascend above during final ascent. The “TEMP” legend and two digits will be replaced with the “CEIL”... -
Page 10: Post Dive Interval
During the first ten minutes (or up to thirty minutes if the unit is in the Training Mode) after a dive, the COMMANDER is in the Post Dive Interval. The flashing "SURF" legend and a Surface Time of less than ten minutes (or up to thirty if the unit is in the Training Mode) indicate this. -
Page 11: Confined Water Protocol (Training Mode)
CONFINED WATER PROTOCOL (Training Mode): The COMMANDER is one of the first dive computers to offer an operating mode designed to record and store data from training dives. That is, dives performed in shallow water environments (swimming pools, shallow lakes, lagoons, etc.) or calm open water environments that have less than 1-foot seas. -
Page 12: Clock Programming
Access the Logbook Mode TOUCH PROGRAMMING - CLOCK: When the COMMANDER is placed into the Clock mode it will display the time of day in a 24 hour day format. The clock will continue to run when the COMMANDER is in the Dive Computer Mode. -
Page 13: Clock Programming Procedure
To exit the Clock Mode Bridge contacts 1 & 2 with wetted fingers and the computer will return to the Dive Computer Mode’s Surface Display. NOTE: Ensure that the COMMANDER is in the Dive Computer Mode before commencing a dive. -
Page 14: Clock Programming Screens
NOTE: Once the COMMANDER is placed in Clock Mode the unit will remain in that mode until exited by the diver. TOUCH PROGRAMMING MODE: NOTE: To enable the Programming Mode, the COMMANDER must be on the Surface and not in the Post Dive Interval. -
Page 15: Touch Programming Procedure
NOTE: It is strongly recommended that the Programming Mode is activated again and a complete review of what was stored is accomplished. NOTE: If the COMMANDER is left in the Programming mode for five minutes without the contacts being touched, the unit will automatically exit the Programming Mode and return to the Surface Interval. -
Page 16: Touch Programming Menu
7. To save the changes that have been made bridge Contact 1 & 2 with a coin or other conductive metal object. Once the next programming option is displayed the changes have been saved. All programming sequences use the same routine of using Contacts 1 and 2 to SELECT the next programming sequence and Contacts 2 and 3 to INCREMENT the specified value. -
Page 17: Pre Dive Prediction
PreDive Prediction is accessed via the Touch Contact Programming Menu. This enables the diver to view the PreDive Prediction information at the touch of the Contacts. The COMMANDER’s PreDive Prediction starts at 30 feet and increases in 10 feet increments. PreDive Predictions will terminate when the No- Decompression (NDC) time prediction reaches two minutes or a maximum depth of 320 feet is reached. -
Page 18: Information Display
The Battery voltage is displayed in the lower center of the screen as a two-digit number with a decimal point proceeded by a lower case ‘b’. Figure 24 shows what the display screen looks like for a Commander configured for Air Only. TOUCH PROGRAMMING - DEPTH ALARM: The... -
Page 19: Conservatism
TOUCH PROGRAMMING - TACLITE™: The Taclite™ dwell (on) time can be set so that when the face on the COMMANDER is tapped the Taclite™ will stay on from 1 to 98 seconds. If the dwell time is programmed to ‘0’ the Taclite™ will never come on, if programmed to 99 the Taclite™... -
Page 20: Logbook Screens
Maximum Ceiling (Deco Dive) It is not necessary to exit the Logbook Mode prior to initiating a dive. Once the diver has descended below five feet, the COMMANDER will immediately enter the Dive Mode. NOTE: The overall Dive Number that is displayed on... - Page 21 Figures 36 & 38b display a Deco Dive.
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Page 22: Warning Indications
WARNING INDICATIONS: Failure to observe audible and/or visual warnings and take corrective action may result in injury or death. In general, if the WARNING legend is flashing, some other digits should be flashing to indicate the anomaly. • If the diver is ascending faster than the selected maximum ascent rate, then the top bar of the ascent bar graph will flash and the “WARNING”... -
Page 23: Sensor Warning Mode
Mode. If the Sensor Warning was for the temperature sensor it would display “S-t“. DATA STORAGE TYPES & CAPACITY: The COMMANDER has the following internal distinct data storage activities that can be recalled, viewed, and ® stored with the Analyst PC computer interface: •... -
Page 24: Inter-Dive Events
® Low Batteries, Sensor Malfunction, Analyst interface with Dive Computer. INTER-DIVE EVENTS: The COMMANDER stores important information between dives, even when the unit is not turned on. The information is stored as acquired and is called an “Inter-Dive Event”. These ®... - Page 25 Analyst Metric or Imperial: The diver may select whether the data is computed and displayed in Metric or Imperial units. The COMMANDER may be ordered either way as shipped from the factory. Selectable Ascent Rate Bar Graph (Fixed or...
- Page 26 If “On” the recent dive history is used to compensate the nitrogen loading for the current dive. The COMMANDER is shipped from the factory with this feature set to ‘On’. Temperature Dependent NDC Computations...
- Page 27 (Enabled or Disabled): This option enables the Training Mode for the COMMANDER. In this mode the COMMANDER will enter the Dive Mode at 2 feet instead of 5 feet and exit the Dive Mode at 1 foot instead of 3 feet. The Training Mode also permits the selection of an increased Post Dive Interval period from 10 to 30 minutes in one-minute increments.
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Page 28: Product Specifications
Training Mode Post Dive Interval Period (10 to 30): If the Training Mode is enabled this allows the user to select the duration of the Post Dive Interval period from a minimum of 10 minutes to a maximum of 30 minutes in one-minute increments. -
Page 29: Enhancements
Nitrox/PO computer. The Dive Profile Storage memory capacity can be upgraded from a base of 135 hours to 550 hours. The COMMANDER must be returned to the factory for all upgrades except to that of a one blend Nitrox. - Page 30 Nitrogen residuals. If the batteries are allowed to discharge too low, or if removed for too long, the COMMANDER may enter a state where it will not turn on even with new batteries. If this occurs, remove the batteries and allow the unit to set for 30 minutes and then install fresh batteries.
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Page 31: Assistance, Repair, & Maintenance
If this is not possible or is inconvenient due to a change in location, contact us for the name of the nearest Team Cochran Authorized Dealer. •... -
Page 32: Product Certifications
Consult the dealer or an experienced radio/TV technician for help. MODIFICATIONS Changes or modifications not expressly approved by Cochran Consulting, Inc. could void the user's authority to operate the equipment. SHIELDED CABLES This product is designed to be used only with the ®... -
Page 33: Limited Warranty And Liability Statement
Product to be free of defects in materials and workmanship under normal SCUBA use for 24 months from the date of shipment from COCHRAN to the Authorized Dealer or Distributor. For purposes of establishing warranty eligibility, this date of shipment may be noted on the original Product box, or can be determined by contacting COCHRAN. - Page 34 Cochran approved Analyst Interface. OWNER is responsible for shipping this Product to COCHRAN for service, and paying all associated costs, including shipping, insurance, and import duties. OWNER may take Product to an Authorized Dealer to arrange service under terms of this Limited Warranty.
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Page 35: User & Environmental Adaptation
COCHRAN and its distributors and retailers will not be held liable for any personal injuries or other damages resulting from its use, even if COCHRAN has been advised of such occurrences or damages. These products must be handled with care and properly maintained to assure the optimum performance. - Page 36 WATER TEMPERATURE: Diving in cold water can lead to a lower diver core and skin temperature which can affect the gas exchange rate of the body’s tissues. The COMMANDER features two modes of Temperature Compensation, Normal or Reduced. The COMMANDER progressively makes its nitrogen algorithms more conservative as the water temperature declines below 75 degrees F.
- Page 37 Diving in a medium different from what the dive computer is calibrated for will cause apparent depth errors. Only COCHRAN dive computers, including the COMMANDER, actually determine the type of diving medium and compensate the depth reading accordingly.
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Page 38: Metric & Imperial Modes
METRIC/IMPERIAL MODES: Most dive computers always compute in either Metric or Imperial units and merely convert the display to the other units. The COMMANDER actually computes and displays in the selected units giving maximum accuracy and user familiarity. If the computer is computing and displaying in Metric, the “METRIC”... -
Page 39: Low Battery Indications
LOW BATTERY INDICATIONS: Fresh ENERGIZER ® brand alkaline batteries should read about 3.2 volts on the Information Screen. When the battery voltage drops to 2.1 volts, the “BATT” legend will be illuminated. It is recommended to change the batteries at this point, but several dives might still remain possible. -
Page 40: Table Of Contents
TABLE OF CONTENTS Page Number Product Introduction Side Touch Contacts Turning the Product On & Off Main Operating Modes Surface Interval Dive Mode Ascent Rate Bar Graph Decompression Mode Post Dive Interval Confined Water Protocol (Training Mode) TACLITE™ Clock Programming Clock Programming Procedure Clock Programming Screens Touch Programming Procedure... -
Page 41: Figures Index
FIGURES INDEX Fig # Page Number Self-Test Screen Surface Interval - Primary Screen No Nitrogen Surface Interval - Primary Screen With Nitrogen 10a Dive Mode 12a Ascent Bar Graph PreDive Prediction 16d Deco Mode - Showing Total Time 17d Deco Mode - At zero depth Sensor Warning - Primary Screen - Showing Depth Sensor Post Dive Interval - Primary Screen... - Page 44 Cochran COMMANDER Owner's Manual English - Imperial Ver: CmdrAir-1.02 Manual Part Number: 4100811 1758 Firman Drive Richardson, Texas 75081, USA Phone 972-644-6284 972-644-6286 www.divecochran.com...
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Questions and answers
My Cochran dive watch is not giving me actual depth measurements. I’m diving at altitude and the dive depths are incorrect.How do I rest it?
The Cochran COMMANDER dive watch adapts to altitude automatically as part of its environmental adaptation features. There is no specific manual reset required. However, if depth measurements appear incorrect, ensure the unit is functioning properly by installing fresh batteries and verifying its settings via the Analyst® P.C. Interface. If issues persist, contact Cochran Customer Support.
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