Dive Rite introduced oxygen tracking on a dive computer in 1992 with the launch of the Bridge, the first user programmable computer from 21% to 50%. It has since become the standard for any Nitrox computer. Oxygen tracking was developed by Randy Bohrer and the late Dr. Bill Hamilton for SEIKO EPSON. SEIKO EPSON went on to patent the technology of graphing oxygen tracking on dive computers, but decided it was too important not to be on all dive computers to enforce the patent. This led to the birth of the OLI (oxygen limits index), which was based on hyperbaric treatment studies. See this article for more information: A PROVISIONAL METHOD OF OXYGEN EXPOSURE MANAGEMENT FOR A RECREATIONAL DIVE COMPUTER
In the oxygen tracking algorithm, we don’t track OTUs at all. Hamilton’s OTU approach was used to manage long exposures, such as saturation type dives. For the dive computers, we track one value – the oxygen limit index. This index accounts for both CNS and chronic/whole body oxygen toxicity (or oxygen tolerance). The 90 minute half time for recovery is very conservative for CNS toxicity, since we know that it is possible to breathe oxygen at high partial pressures if a short air break is taken periodically. It is adequate for chronic/whole body toxicity, since it allows for full recovery in an amount of time that is sometimes used in respiratory therapy.
The Nitek Q has nine bars for tracking oxygen and nitrogen. At 80% of calculated maximum oxygen exposure the bar graph will start to flash once the 8th bar starts to fill up. The Nitek Q will assume oxygen loading for one hour after the dive. This is our conservative approach to oxygen tracking. With a 90 minute half life, the 8 bars lit will drop to 4 in 90 minutes, then drop to 2 bars in another 90 minutes, and to 1 bar in another 90 minutes. If your oxygen loading exceeds 100% the graph will flash until it is back into range.
Remember, tracking is only as good as the information supplied. Properly analyzing and entering the correct gas mixture is a good start.
Pictured: Dive Rite technical computers starting with the Bridge II through Nitek Q
The latest release of the WB 3.0.2 is on the web. This release was designed to push firmware updates to your Nitek Q computer. If you purchased one before firmware 2.0 (black USB cap), then you haven’t been able to use the WB logbook function. If you purchased a later model (red USB cap), then you have access to the WB.
The WB is a free download from our website, and I encourage you to download it and update the firmware on your computer. We are up to version 2.0.5 on the firmware. The update includes better animation during battery charging and a 10 hour countdown on battery life. It still checks voltage, but now has a 10 hour countdown on the time the display is active. Since the display has the highest power consumption, it gives you a better indicator of battery life with a reserve. The overall battery life hasn’t changed.
To use WB 3.0.2 on a PC, it needs to have Windows 7 or newer and you need to have administrator rights. Everyone believes they have administrator rights to their PC, but sometimes the wrong check box or another program can change it. One user that was having issues with installation and communications to load the program used this link http://www.mytechguide.org/106/how-to-log-on-as-administrator-in-windows-7/ to log on as administrator, and it worked for him.
MAC is easier, but I had an issue with a USB port not allowing enough communications/power to allow for the re-flash, but would still allow me to upload dives. I switched ports and now everything works.
Since the program is internet based you must have a high speed connection to install the program or get any firmware updates or upgrades. Look for more features now that we can push firmware updates to your Nitek Q.
To download Workbench for Mac or PC visit: http://www.diverite.com/products/catalog/computers/co-xxxx
One of the biggest challenges I’ve faced as a scuba diver hasn’t been how to clear a flooded mask or how to hover effortlessly in perfect trim, although both of those skills were challenging to learn. The biggest challenge I have found is to find gear that fits. In fact, my quest for well-fitted dive gear is what ultimately garnered me a job at Dive Rite…I was trying to learn how to sidemount and needed a rig designed for my petite frame. I knew Dive Rite was the only company that had gear designed for all shapes and sizes and if they couldn’t fit me, they would do a custom rig.
I happen to know that I’m not the only diver who is frustrated with gear designed for a 6-foot tall male or has a footprint the size of Sasquatch. The beauty of diving is the effortlessness that comes from being free of gravity. To glide rather than walk, to travel easily with speed, to move with grace and explore! The last thing I want is to take Sasquatch along for the ride.
This brings me to write this shout-out for the Dive Rite NiTek Q dive computer, which I love. The reason I love it? It has a tiny footprint, yet packs all the features required of a 2-gas or mixed-gas computer and displays them on a HUGE screen. Now I have a dive computer that sits upon my arm that I can read and easily scroll through the menus. Other dive computers are so big and heavy that they won’t stay put and flop around my wrist. I find myself constantly repositioning them on the dive, which is annoying and anti-productive.
Ah, thank you, Dive Rite, for once again delivering just what I need!
Kathleen Byars, Marketing Director
Too BIG! Screen too tiny This one is just right!
The NiTek Q Workbench software is ready for release and a link is available on our website. The Windows version was developed for Windows 7 and the Mac version is ready for Snow Leopard and Mountain Lion. The communications are plug and play, just follow the directions on screen to install, you must have a broadband internet connection to install the software. After it’s installed another screen will indicate when its ready for offline use. For best results try to have an internet connection when accessing the program so it can check for software updates. This version works with Nitek Q units with firmware 2.0 and higher. As soon as the next version is ready (later this month) computers with earlier firmware versions can be updated via the Workbench and will then work with all the functions in Workbench.
The bungee mount is available as an option for divers who prefer that mounting to a standard strap. See Dive Rite TV for installation instructions.
Nitek Q computers are in stock and available for immediate shipment. We have changed the USB plug to red along with the sealing o-ring so the diver has high contrast between the computer and seal. Whenever you remove the USB cable and activate the screen (by pushing either button) it displays “remember to replace the USB cap” and this screen will not go away until you hold the left (A button) for five seconds.
We have now repackaged the standard options to make it easy for divers. The basic model is two-gas, Nitrox and the Trimix model is full seven-gas, Trimix mode. All the other options can be purchased as desired and this keeps the price competitive based on the main features divers have asked us for.
The Nitek Q4 comes with full, seven-gas Trimix as well and closed circuit mode unlocked. When choosing between the Q and Q4 remember the only feature the Q4 has that the standard Q can’t do is monitor a 4th cell in a rebreather. The Q4 is more expensive because of the “Fischer” cable interface for direct connection to an oxygen sensor in the rebreather.
Thanks to all our customers for your patience during this long delay. This certainly wasn’t our goal and we appreciate everyone who stood by us along the way.