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How to change battery on a sherwood courier dive computer

It is the SPG type not a wrist type and has a rubber housing.

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SOURCE: the SPG seems to be stuck at 80Bar when ever u turn my air on.

the gauge is bad

Posted on Apr 21, 2009

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1 Answer

What are the main manufacturers of dive computers?


The main manufacturers of dive computers are: Oceanic, Aeris, Suunto, Mares, Sherwood, and Tusa.

Feb 06, 2013 | Scuba Diving & Snorkeling

2 Answers

What are the different types of dive computers?


The two main types of dive computers are wrist dive computers and console dive computers. Wrist dive computers are actually just like wrist-watches (a little bigger) and are worn on the diver's wrist. Right now, they are smallest dive computers available.

Console dive computers are attached to the diver's equipment by a hose. Main difference between console dive and wrist dive computers is that console dive computers include pressure devices in them.

Feb 06, 2013 | Scuba Diving & Snorkeling

1 Answer

My aqualung duplex alternates flashing seconds then "ER"in the lower display window, I've reset it as the manual instructs, after pushing the stem back in it beeps twice then starts the same...


This watch needs to be sent back to the factory to get the movement replaced. I am doing this for the second time in 4 years. Citizen Europe states it's a defective design. The watch goes into dive mode with sweat, humidity and washing your hands. The water sensor tells the computer it's gone diving but the pressure sensor isn't telling it the same thing which causes a fault with the computer. I was told to cover the water sensor with WAX by the factory repair facility. WAX on a $400 dive watch. Great. They shold have used the pressure sensor to initiate dive mode. Customer Service said it wasn't defective, so it was designed to need this part everytime the battery has to bre replace.

May 27, 2011 | Citizen Aqualand Duplex JP104009E Wrist...

1 Answer

I have packed my computer in my backpack and after a few hours now i picked it up and found that it's in the dive mode: top line normally shows no-deco time = so now it's showing 9:59 (like in the...


All dive computers will automatically come off dive mode when they are out of water. sounds like you may have water in it. I strongly recommend that you do not dive with this unit but send/take back to the place where you got it. I would guess it is still under warranty. Hope that helps

Oct 19, 2010 | Tusa Zen Wrist Dive Computer (IQ900)...

1 Answer

Extremely short battery life. How to fix?


Battery life is completely dependant on how often you use the computer to dive with. Batteries should generally be changed every two years regardless of use. An authorised dealer will also use the best recommended battery for the unit and not use cheap imported batteries. Hope that helps

Sep 19, 2010 | Uwatec Aladin Tec 2G Wrist Computer SCUBA...

1 Answer

Rapid depth reading variation during ascent


change the battery and use the reset button to manually reset the computer

Nov 09, 2009 | Dive Rite Nitek Duo Air/Nitrox Computer -...

1 Answer

I have a SR1 that had the breathing resistance knob on the 2nd stage fall off during a dive. Any clue where I can get a new one without sending the reg in for service?


Not likely a dive store or the manufacturer will sell such a part due to liability concerns. That being said, the knob should NOT fall out.
You could contact the place you bought it seeking warranty repair.
Ditto with the manufacturer. If you call Sherwood and describe the problem there's a good chance they will replace the part (in house) at no charge other then postage. However, most manufacturers require annual inspection/overhaul of life support equipment to maintain warranty status.

Sep 23, 2009 | Sherwood SR1 Regulator

1 Answer

How do you change the battery in a series 3100 luminex navy seal


Take it to a reputable jeweler, this model has a screw off back and you need a special tool to remove it...good luck :)

Jan 26, 2009 | Luminox Navy Seal Dive 3001 Wrist Watch

1 Answer

How and why scuba gauges give a diver critical information while scuba diving?


Scuba gauges give a diver three very important pieces of information: 1. Time 2. Depth 3. Air Consumption This information enables a diver to stay within safe time and depth limits and avoid running out of air. There are many different devices on the market to help with this, from simple gauges to complex digital consoles. Time If a diver is not using a dive computer to monitor their nitrogen, they dive according to approved dive tables. To use dive tables properly, a diver needs to track their downtime. This can be done with a good dive watch. Two things make a good dive watch: water resistance and a rotating bezel. 1. Water Resistance. Good dive watches are rated to a depth in meters or feet (e.g. 200 feet) or a pressure rating in atmospheres (e.g. 4atm). Even though most divers probably won’t dive below 130 feet (the recreational dive limit), a good dive watch should be rated to 200 feet. Note: There is a difference between “water resistance” and “waterproof”. A “waterproof” watch is what you would wear in the shower, but would probably start leaking at 15-20 feet. 2. Rotating Bezel. A bezel is an adjustable ring on the face of the dive watch with a pointer indicator. At the beginning of a dive, the pointer on the bezel is aligned with the minute hand where it stays though out the dive. At the end of the dive, you compare the difference between the bezel and the minute hand to find out the length of the dive. The bezel should only move “counterclockwise”. It is possible to accidently move the bezel during a dive. Because of this, watchmakers make sure any accidental movement will turn the time in a conservative direction, making the dive longer rather than shorter. Depth Another important part of scuba gauges is a depth gauge. A depth gauge enables a diver to keep track of their depth even if they cannot see the water’s surface. Gauges can be either an analog (needle-and-dial) device or a digital device. Both work in the same way. They measure the surrounding water pressure and convert this into an accurate reading of your depth. Another feature of a good depth gauge is a maximum depth indicator. This tells a diver their maximum during a dive and must be reset after each dive. Air Consumption Another equally important part of scuba gauges is a submersible pressure gauge (SPG). This is connected to the first stage with a high-pressure hose and measures the pressure of the air in the tank. The SPG is much like the gas gauge on a car. At the beginning of a dive, a diver starts with a full tank. This should be about 3000 psi or 200 bars. As the diver breathes during the dive, the gauge will move slowly downwards. This allows the diver to have enough air left in the tank to: 1. Make a slow, safe ascent 2. Make any necessary decompression stops 3. Inflate their BCD once at the surface 4. Breath from the regulator if the surface conditions are rough A submersible pressure gauge also allows a diver to stop diving with air still in the tank. This keeps contaminants from entering the tank due to no air pressure. Wrist Depth Gauge Scuba gauges come in two basic styles. Stand alone gauges or gauge consoles. Stand alone gauges such as a wrist mounted depth gauge or a submersible pressure gauge attached to the first stage of a regulator are great backups when using digital gauges. Gauge consoles allow divers to have all their gauges in one place. Although less easy to read, analog gauges sometimes give slightly more accurate readings than digital gauges, particularly at shallow depth. Submersible Pressure Gauge Choosing Scuba Gauges When choosing scuba gauges, remember to look for: 1. Easy-to-read numbers 2. Luminescent dial or back lighting options 3. Rotating/swivel mounting 4. Easy disassembly for cleaning or replacing parts 5. Good warranty

Dec 01, 2008 | Aeris Max Depth Analog 2 Gauge Console

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