HP DESIGN JETT 770

History

Putting isolation transformers into a UPS system is not new. In fact, some technologies relied on the transformer to create the power waveform (ferro-resonance). In most cases the need for the transformer was due to it’s ability to step up an AC voltage. This allowed an inverter to output a low AC voltage due to limitations on the voltage capacity on the power electronic components. More recently advances in power electronics have enabled the transformer to be removed and the inverter output connected directly to the load. This is called a high frequency design and is the basis for modern online double conversion UPS.

The 1/2V 10V Myth

Some UPS manufacturers include an isolation transformer to allow the Neutral to be bonded to the earth thereby creating a new N-E bond and eliminating any Neutral to Earth Voltage. Claims have been made that common mode voltage (and that means a voltage referenced to a common source – in this case the ground or earth conductor) of over V or normal mode (between live and neutral) of over 10V can cause equipment malfunction.

However, Neutral to Earth voltage does not cause malfunction with modern electrical equipment. This can be easily demonstrated by going to Germany and plugging something into the wall socket. You can then unplug it, turn the Schuko lead around by 180 degrees and plug it in again. Hey presto, what was once live is now neutral and vice versa and guess what – the electrical equipment works just the same without any problems at all, despite the neutral to earth voltage being 230V. Or you could simply rewire your mains lead to demonstrate.

Computer owners, if you are having a speed issue with your personal system or laptop and you keep asking yourself “why is my computer running so slow?”, the first thing you need to know is there is no definitive answer. There are many things which can slow down and mess with your system. Using a high quality anti adware and spyware software has helped to clear up my PC of annoying pop ups and increased its speed significantly.

Here are just some of the problems which can affect the way your operating system runs; check to see if you have too much memory stored. Sometimes we download and download and forget we actually have a limited amount of space. Other causes for slow running machines are viruses; these can be detrimental to your system.

The viruses which are most likely to slow your machine down are Trojan, adware, and spyware. So how does one go about finding the cause for the sluggish behavior of one’s system?. In this article I will be discussing in short the ways we can find and perhaps locate the reason for a slow machine.

Like I said above, the first and by far the easiest thing to do is check to see if your computer’s memory is full or close to full. Another possible reason can be the registry. The registry is the system which keeps your machine alive. Too free up space double click My Computer and you will see how much memory you have and have used. If your memory is almost full, you can go to the control panel which is located in the start menu and click “uninstall programs”.

Once this is open, you will see a list of programs. Go through the list and uninstall any programs you either never use or you think you can live without. If your computer is still lethargic, then that was not your problem. But I suggest giving it some time first before downloading all sorts of programs.

In the event that you have done this, and the machine is still running slowly, the cause is most probably viruses. What you will need to do is download an antivirus software or anti adware. Do not be fooled by antivirus software that you have to purchase; there are so many efficient and reliable free ones out there it does not pay to purchase unless you have to run a business from that computer.

When you have used your Windows machine for a while, you are quite likely to notice that its performance is comparatively much slower than it used to be. You may blame it on adware and viruses but you will be surprised to know that the slowing down of Windows over time is in fact absolutely normal. If the lethargic performance of your system is affecting the efficiency of your work, you will be happy to know that usually, you can deal with this problem quite easily and all on your own!

Your computer’s performance can be improved both through speeding up your software and your hardware. Software speeding up can be as simple as tweaking some of your windows settings, spring cleaning your memory or changing your program settings. On the hardware end, updating your hardware components and using the right BIOS settings can go a long way.

The simplest trick here is to ensure that you have the right hardware to support your Windows OS. Your processor version, RAM and hard drive configurations work together to facilitate your computer’s performance but updating the RAM alone can have a noticeable impact on system speed and operability. The BIOS is another often ignored but high influence option. Computer companies often update BIOS versions to address system errors, add features or simply to enhance performance, so make sure you are using the latest version of the BIOS at all times. Tweaking BIOS settings like Boot Order, Quick Power on Self Test and Chipset features can also speed up your system boot up. To enhance the performance of your installed hardware, check that you are using the latest versions of all device drivers.

Users can accumulate a lot of software and data over time which clutters up the computer and slows it down. Start by uninstalling some of your unused applications and program files like games, unused browsers, and messengers. Similarly, clean-up your desktop by organizing all your documents in your My Documents folder and sub-folders. Boot up is much faster with desktop shortcuts than the actual files sitting on your desktop. Another handy trick is to hasten Startup by shortening the list of programs that Windows runs. Remove unnecessary programs from the list and you can fasten the start up process significantly.