Note: this was written on Monday August 13th, 2007 as Hurricane Flossie advanced on the Hawaiian islands.

As I write this, it's a bright and sunny day outside, with nothing to hint at the fact that we're under a hurricane advisory. Hurricane Flossie is bearing down on us and could hit tomorrow or Wednesday, so people are scurrying around all over the island stocking up on bottled water, food and other supplies.

But there's one thing they should have that most of them probably haven't thought of.

It's called a UPS -- not to be confused with the shipping company of the same name -- which stands for "Uninterruptible Power Supply", and it's an important thing to have to protect your computer even if you're not being threatened by a hurricane.

Let me explain what a UPS is, and what it does.

First off, let me back up a step and make sure you know what a surge suppressor is, since the two things are related.

A surge suppressor is a power strip with a bunch of power sockets in it that is designed to "take the bullet" for your computer if there is a "power surge".

In other words, the electricity that comes into your house is supposed to be at a certain level. Sometimes, like if there is a lightning strike, or the power goes out (like a blackout) and comes back on again, there is a "surge" of power.

Imagine a huge wave coming in on a beach -- normally the waves are within a certain level, and so are safe. But if a huge wave comes in (like a tsunami or tidal wave maybe, but not necessarily that big even) it can be dangerous.

So if a big surge of power comes up the line for whatever reason, if you don't have a surge suppressor to "suppress" the extra power, it can fry your computer's circuits -- or a TV or any electronic device for that matter.

So it's absolutely essential to at least have one of those to protect your computer and other electronics. And when you buy one, remember that power surges can come up phone lines and even cable lines (like if you have Roadrunner or other cable internet) and fry your machine that way. So when shopping for a suppressor, get one that covers everything.

So a UPS is like a surge suppressor, but it does even more to protect your computer.

A UPS basically is a big surge suppressor that has a battery inside it.

Because of this, if the power goes out, an alarm goes off (in case you didn't notice the lights go out, or it's daytime) and you have several minutes to save what you're doing and shut down the computer safely.

Every UPS is labeled with a number measured in VA -- the higher the number, the longer the power lasts. I suggest getting one that is at least 650VA.

The other benefit a lot of people don't know about that you get from having a UPS is that if you live in an area (like here on the Big Island) where the power grid is, shall we say, less than reliable, you get protection from brownouts.

Brownouts are when the power level falls but doesn't go away, so it's one step below a blackout. This can often happen without the lights dimming or anything visible happening. But it can still hurt your computer if this keeps happening.

Getting a UPS will protect you from the gradual damage done by brownouts, which you can think of as hurting your computer (or TV, etc.) the way that erosion gradually wears away at a beach.

So if you have a UPS you're protected both ways. For $100 or less, that's a good buy.

Oh, and one last thought -- another nice benefit of having one or more UPSes in your house is if the power goes out, you can plug a light into it and not have to sit in the dark!

This works best with fluorescent bulbs, of course. Since they use so much less electricity than an old fashioned "incandescent" bulb, the battery in the UPS lasts a lot longer.

A lot of times, if your TV and cable box (or cable modem for that matter, if you use cable internet) is hooked into a UPS too, the cable still works in a power outage -- so you get TV to entertain you, portable phones will probably work, and maybe even the Internet!

Worth Godwin is a computer coach with a dozen years' experience helping computer users of all levels, and has also worked for many years "in the trenches" as a hardware and software tech, solving real-world computer problems.

Worth has also been studying the human mind, and how people learn, since the early 1990s. He draws upon all of this, and his English and writing degrees, to teach people in a unique way with explanations that really make sense.

In 2006, Worth began putting his easy lessons together as audio & video lessons on CD, for both Windows & Mac. Designed to make it easy to learn at your own pace, for an affordable price. These lessons let you see each click of the mouse and every step of the lesson, while you hear Worth's clear explanations.

Everything comes with a full 1-year no-hassle money back guarantee.

More information, testimonials from happy clients, & the free report "5 Common & Costly Computer Mistakes and How to Avoid Making Them Yourself" are available at http://www.WorthGodwin.com.

¶ 6:36 PM 0 comments

Using air conditioning tools can make even simple jobs costly because of their specialized nature. Equipment that is designed to be used exclusively on air conditioning systems also adds to the cost of any repair work. Some tools that are used in air conditioning work can be used for other jobs while others have only that function.

When working on air conditioning systems it is important that the diagnosis of any problem is accurate. Otherwise, adjustments may be made which didnt have to be done, adding to the overall cost of the repairs.

Using the right air conditioning tool helps to ensure that these sorts of mistakes rarely happen. By using the correct air conditioning tool, the technician is able to more accurately diagnose what the problem is with a unit. In this way only the correct parts or repairs are put into place. These specialized tools are not cheap with many models ranging up to $2000, but because they ensure that the job is done right and professionally, the price is worth it.

Air conditioning uses pressure generated by a compressor inside the unit to move the cooling Freon gas through a series of cooling coils. Gauges are used to find out if the unit is working properly and help to show where any pressure may be leaking from the system. This tool is capable of showing where problems may develop within the compressor, the evaporator assembly or the condenser and is able to show any leakages in the units tubing.

What Gauges Are For

At the heart of the air conditioning system is a compressor with two ports. The first is an input port that pulls warm air in over the Freon-filled coils, creating cold air, which is pushed through the evaporator and condenser and then into your home or vehicle.

Gauges are used to monitor the suction and output pressures and are used to show when a problem is causing the unit not to work. The best air conditioning tools utilize both input and output gauges in the same unit.

Some tools are made to specifically locate Freon leakages within the system piping. Some even use ultraviolet lighting to find the leaks, which trained professionals find to be the fastest and best tools for the job.

A simple thermometer can be an important tool in finding the source of leakage in any air conditioning system, as the Freon leak will always be much colder than the ambient air around the unit. Any excess temperature within the unit may also mean that the unit may be having overheating problems and is not functioning as efficiently as it should be.

You can also find more info on Central Air Conditioning and Home Air Conditioning Units. Knowairconditioner.com is a comprehensive resource to know about Air Conditioner.

¶ 6:32 PM 0 comments